shithub: sox

Download patch

ref: 06c0942591b3e9bef658ef43342eb056743057e1
parent: e614255a43411b3d30ada69cd49afd21c2cf2244
author: Doug Cook <idigdoug@users.sourceforge.net>
date: Sat Apr 2 17:51:25 EDT 2011

Fix getopt to not use global state

Replace the existing getopt (uses global variables) with a new
implementation that uses no globals. The caller initializes an
lsx_getopt_t object via lsx_getopt_init, then repeatedly calls
lsx_getopt to get the parameters. The lsx_getopt API is fully
defined in sox.h, so sgetopt.h is no longer used). Deleted the
GNU implementation (getopt1.c is no longer used). Updated
effects.c to no longer adjust the global getopt state.
Updated effects and sox.c to use updated lsx_getopt.

Also deleted some of the dangling references to soxstdint.h.

--- a/configure.ac
+++ b/configure.ac
@@ -590,7 +590,6 @@
 AM_CONDITIONAL(STATIC_LIBSOX_ONLY, test "$enable_shared" = "no" -a "$enable_static" = "yes")
 
 dnl Generate output files.
-AX_CREATE_STDINT_H(src/soxstdint.h)
 AC_CONFIG_FILES(Makefile src/Makefile libgsm/Makefile lpc10/Makefile msvc9/Makefile msvc10/Makefile sox.pc)
 AC_OUTPUT
 
--- a/msvc10/LibSoX.vcxproj
+++ b/msvc10/LibSoX.vcxproj
@@ -122,7 +122,6 @@
     <ClInclude Include="..\src\rate_poly_fir.h" />
     <ClInclude Include="..\src\rate_poly_fir0.h" />
     <ClInclude Include="..\src\raw.h" />
-    <ClInclude Include="..\src\sgetopt.h" />
     <ClInclude Include="..\src\sox.h" />
     <ClInclude Include="..\src\sox_i.h" />
     <ClInclude Include="..\src\sox_sample_test.h" />
@@ -333,7 +332,6 @@
     <ClCompile Include="..\src\g723_40.c" />
     <ClCompile Include="..\src\g72x.c" />
     <ClCompile Include="..\src\getopt.c" />
-    <ClCompile Include="..\src\getopt1.c" />
     <ClCompile Include="..\src\libsox.c" />
     <ClCompile Include="..\src\libsox_i.c" />
     <ClCompile Include="..\src\raw.c" />
--- a/msvc10/LibSoX.vcxproj.filters
+++ b/msvc10/LibSoX.vcxproj.filters
@@ -106,9 +106,6 @@
     <ClInclude Include="..\src\raw.h">
       <Filter>Headers</Filter>
     </ClInclude>
-    <ClInclude Include="..\src\sgetopt.h">
-      <Filter>Headers</Filter>
-    </ClInclude>
     <ClInclude Include="..\src\sox.h">
       <Filter>Headers</Filter>
     </ClInclude>
@@ -589,9 +586,6 @@
       <Filter>Shared Sources</Filter>
     </ClCompile>
     <ClCompile Include="..\src\getopt.c">
-      <Filter>Shared Sources</Filter>
-    </ClCompile>
-    <ClCompile Include="..\src\getopt1.c">
       <Filter>Shared Sources</Filter>
     </ClCompile>
     <ClCompile Include="..\src\libsox.c">
--- a/msvc9/LibSoX.vcproj
+++ b/msvc9/LibSoX.vcproj
@@ -280,10 +280,6 @@
 				>
 			</File>
 			<File
-				RelativePath="..\src\sgetopt.h"
-				>
-			</File>
-			<File
 				RelativePath="..\src\sox.h"
 				>
 			</File>
@@ -1197,10 +1193,6 @@
 			</File>
 			<File
 				RelativePath="..\src\getopt.c"
-				>
-			</File>
-			<File
-				RelativePath="..\src\getopt1.c"
 				>
 			</File>
 			<File
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -4,7 +4,6 @@
 example?
 soxconfig.h.in
 soxconfig.h
-soxstdint.h
 .deps
 stamp-h1
 .libs
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,7 +57,7 @@
   effects                 formats_i               libsox_i
   effects_i               ${formats_srcs}         ${optional_srcs}
   effects_i_dsp           getopt
-  ${effects_srcs}         getopt1                 util
+  ${effects_srcs}         util
   formats                 libsox                  xmalloc
 )
 add_executable(${PROJECT_NAME} ${PROJECT_NAME}.c)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -61,7 +61,7 @@
 libsox_la_SOURCES = adpcms.c adpcms.h aiff.c aiff.h cvsd.c cvsd.h cvsdfilt.h \
 	  g711.c g711.h g721.c g723_24.c g723_40.c g72x.c g72x.h vox.c vox.h \
 	  raw.c raw.h formats.c formats.h formats_i.c sox_i.h skelform.c \
-	  xmalloc.c xmalloc.h getopt.c getopt1.c sgetopt.h \
+	  xmalloc.c xmalloc.h getopt.c \
 	  util.c util.h libsox.c libsox_i.c sox-fmt.c soxomp.h
 
 # Effects source
--- a/src/bend.c
+++ b/src/bend.c
@@ -33,7 +33,6 @@
 #endif
 
 #include "sox_i.h"
-#include "sgetopt.h"
 #include <assert.h>
 
 #define MAX_FRAME_LENGTH 8192
@@ -98,15 +97,17 @@
   priv_t *p = (priv_t *) effp->priv;
   char const * opts = "f:o:";
   int c;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, opts, NULL, lsx_getopt_flag_none, 1, &optstate);
 
   p->frame_rate = 25;
   p->ovsamp = 16;
-  while ((c = lsx_getopt(argc, argv, opts)) != -1) switch (c) {
-    GETOPT_NUMERIC('f', frame_rate, 10 , 80)
-    GETOPT_NUMERIC('o', ovsamp,  4 , 32)
-    default: lsx_fail("unknown option `-%c'", optopt); return lsx_usage(effp);
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
+    GETOPT_NUMERIC(optstate, 'f', frame_rate, 10 , 80)
+    GETOPT_NUMERIC(optstate, 'o', ovsamp,  4 , 32)
+    default: lsx_fail("unknown option `-%c'", optstate.opt); return lsx_usage(effp);
   }
-  argc -= lsx_optind, argv += lsx_optind;
+  argc -= optstate.ind, argv += optstate.ind;
 
   p->bends = lsx_calloc(p->nbends = argc, sizeof(*p->bends));
   return parse(effp, argv, 0.);     /* No rate yet; parse with dummy */
--- a/src/dither.c
+++ b/src/dither.c
@@ -20,7 +20,6 @@
 #endif
 
 #include "sox_i.h"
-#include "sgetopt.h"
 #include <assert.h>
 
 #undef RANQD1
@@ -329,20 +328,22 @@
 {
   priv_t * p = (priv_t *)effp->priv;
   int c;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, "+aSsf:rt", NULL, lsx_getopt_flag_none, 1, &optstate);
 
-  while ((c = lsx_getopt(argc, argv, "+aSsf:""rt")) != -1) switch (c) {
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
     case 'a': p->auto_detect = sox_true; break;
     case 'S': p->alt_tpdf = sox_true; break;
     case 'r': case 't': break; /* No longer in use */
     case 's': p->filter_name = Shape_shibata; break;
     case 'f':
-      p->filter_name = lsx_enum_option(c, filter_names);
+      p->filter_name = lsx_enum_option(c, optstate.arg, filter_names);
       if (p->filter_name == INT_MAX)
         return SOX_EOF;
       break;
-    default: lsx_fail("invalid option `-%c'", optopt); return lsx_usage(effp);
+    default: lsx_fail("invalid option `-%c'", optstate.opt); return lsx_usage(effp);
   }
-  argc -= lsx_optind, argv += lsx_optind;
+  argc -= optstate.ind, argv += optstate.ind;
   do {NUMERIC_PARAMETER(dummy, 0.5, 1)} while (0); /* No longer in use */
   return argc? lsx_usage(effp) : SOX_SUCCESS;
 }
--- a/src/effects.c
+++ b/src/effects.c
@@ -17,7 +17,6 @@
 
 #define LSX_EFF_ALIAS
 #include "sox_i.h"
-#include "sgetopt.h"
 #include <assert.h>
 #include <string.h>
 #ifdef HAVE_STRINGS_H
@@ -77,14 +76,12 @@
 
 int sox_effect_options(sox_effect_t *effp, int argc, char * const argv[])
 {
-  int result, callers_optind = lsx_optind, callers_opterr = opterr;
+  int result;
 
   char * * argv2 = lsx_malloc((argc + 1) * sizeof(*argv2));
   argv2[0] = (char *)effp->handler.name;
   memcpy(argv2 + 1, argv, argc * sizeof(*argv2));
-  lsx_optind = 1, opterr = 0;
   result = effp->handler.getopts(effp, argc + 1, argv2);
-  lsx_optind = callers_optind, opterr = callers_opterr;
   free(argv2);
   return result;
 } /* sox_effect_options */
--- a/src/getopt.c
+++ b/src/getopt.c
@@ -1,12 +1,7 @@
-#include "soxconfig.h"
-/* Getopt for GNU.
-   NOTE: getopt is now part of the C library, so if you don't know what
-   "Keep this file name-space clean" means, talk to drepper@gnu.org
-   before changing it!
-   Copyright (C) 1987,88,89,90,91,92,93,94,95,96,98,99,2000,2001,2002
-        Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
+/* lsx_getopt for SoX
+ *
+ * (c) 2011 Doug Cook and SoX contributors
+ *
  * This library is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as published by
  * the Free Software Foundation; either version 2.1 of the License, or (at
@@ -21,1277 +16,334 @@
  * along with this library; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
-
-/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
-   Ditto for AIX 3.2 and <stdlib.h>.  */
-#ifndef _NO_PROTO
-# define _NO_PROTO
-#endif
 
-#if 0
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-#endif
+#include "sox.h"
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
 
-#if !defined __STDC__ || !__STDC__
-/* This is a separate conditional since some stdc systems
-   reject `defined (const)'.  */
-# ifndef const
-#  define const
-# endif
-#endif
-
-#include <stdio.h>
-
-/* Comment out all this code if we are using the GNU C Library, and are not
-   actually compiling the library itself.  This code is part of the GNU C
-   Library, but also included in many other GNU distributions.  Compiling
-   and linking in this code is a waste when using the GNU C library
-   (especially if it is a shared library).  Rather than having every GNU
-   program understand `configure --with-gnu-libc' and omit the object files,
-   it is simpler to just do this in the source for each such file.  */
-
-#define GETOPT_INTERFACE_VERSION 2
-#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
-# include <gnu-versions.h>
-# if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
-#  define ELIDE_CODE
-# endif
-#endif
-
-/* Always compile for SoX. */
-#undef ELIDE_CODE
-
-#ifndef ELIDE_CODE
-
-
-/* This needs to come after some library #include
-   to get __GNU_LIBRARY__ defined.  */
-#ifdef  __GNU_LIBRARY__
-/* Don't include stdlib.h for non-GNU C libraries because some of them
-   contain conflicting prototypes for getopt.  */
-# include <stdlib.h>
-# include <unistd.h>
-#endif  /* GNU C library.  */
-
-#ifdef VMS
-# include <unixlib.h>
-# if HAVE_STRING_H - 0
-#  include <string.h>
-# endif
-#endif
-
-#ifndef _
-/* This is for other GNU distributions with internationalized messages.  */
-# if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
-#  include <libintl.h>
-#  ifndef _
-#   define _(msgid)     gettext (msgid)
-#  endif
-# else
-#  define _(msgid)      (msgid)
-# endif
-# if defined _LIBC && defined USE_IN_LIBIO
-#  include <wchar.h>
-# endif
-#endif
-
-#ifndef attribute_hidden
-# define attribute_hidden
-#endif
-
-/* This version of `getopt' appears to the caller like standard Unix `getopt'
-   but it behaves differently for the user, since it allows the user
-   to intersperse the options with the other arguments.
-
-   As `getopt' works, it permutes the elements of ARGV so that,
-   when it is done, all the options precede everything else.  Thus
-   all application programs are extended to handle flexible argument order.
-
-   Setting the environment variable POSIXLY_CORRECT disables permutation.
-   Then the behavior is completely standard.
-
-   GNU application programs can use a third alternative mode in which
-   they can distinguish the relative order of options and other arguments.  */
-
-#if 0
- #ifdef _LIBC
- # include <getopt.h>
- #else
- # include "getopt.h"
- #endif
-#endif
-#include "sgetopt.h"
-
-/* For communication from `getopt' to the caller.
-   When `getopt' finds an option that takes an argument,
-   the argument value is returned here.
-   Also, when `ordering' is RETURN_IN_ORDER,
-   each non-option ARGV-element is returned here.  */
-
-char *lsx_optarg = NULL;
-
-/* Index in ARGV of the next element to be scanned.
-   This is used for communication to and from the caller
-   and for communication between successive calls to `getopt'.
-
-   On entry to `getopt', zero means this is the first call; initialize.
-
-   When `getopt' returns -1, this is the index of the first of the
-   non-option elements that the caller should itself scan.
-
-   Otherwise, `optind' communicates from one call to the next
-   how much of ARGV has been scanned so far.  */
-
-/* 1003.2 says this must be 1 before any call.  */
-int lsx_optind = 1;
-
-/* Formerly, initialization of getopt depended on optind==0, which
-   causes problems with re-calling getopt as programs generally don't
-   know that. */
-
-int __getopt_initialized attribute_hidden;
-
-/* The next char to be scanned in the option-element
-   in which the last option character we returned was found.
-   This allows us to pick up the scan where we left off.
-
-   If this is zero, or a null string, it means resume the scan
-   by advancing to the next ARGV-element.  */
-
-static char *nextchar;
-
-/* Callers store zero here to inhibit the error message
-   for unrecognized options.  */
-
-int opterr = 1;
-
-/* Set to an option character which was unrecognized.
-   This must be initialized on some systems to avoid linking in the
-   system's own getopt implementation.  */
-
-int optopt = '?';
-
-/* Describe how to deal with options that follow non-option ARGV-elements.
-
-   If the caller did not specify anything,
-   the default is REQUIRE_ORDER if the environment variable
-   POSIXLY_CORRECT is defined, PERMUTE otherwise.
-
-   REQUIRE_ORDER means don't recognize them as options;
-   stop option processing when the first non-option is seen.
-   This is what Unix does.
-   This mode of operation is selected by either setting the environment
-   variable POSIXLY_CORRECT, or using `+' as the first character
-   of the list of option characters.
-
-   PERMUTE is the default.  We permute the contents of ARGV as we scan,
-   so that eventually all the non-options are at the end.  This allows options
-   to be given in any order, even with programs that were not written to
-   expect this.
-
-   RETURN_IN_ORDER is an option available to programs that were written
-   to expect options and other ARGV-elements in any order and that care about
-   the ordering of the two.  We describe each non-option ARGV-element
-   as if it were the argument of an option with character code 1.
-   Using `-' as the first character of the list of option characters
-   selects this mode of operation.
-
-   The special argument `--' forces an end of option-scanning regardless
-   of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
-   `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
-
-static enum
+void
+SOX_API lsx_getopt_init(
+    LSX_PARAM_IN             int argc,                      /* Number of arguments in argv */
+    LSX_PARAM_IN_COUNT(argc) char * const * argv,           /* Array of arguments */
+    LSX_PARAM_IN_Z           char const * shortopts,        /* Short option characters */
+    LSX_PARAM_IN_OPT         lsx_option_t const * longopts, /* Array of long option descriptors */
+    LSX_PARAM_IN             lsx_getopt_flags_t flags,      /* Flags for longonly and opterr */
+    LSX_PARAM_IN             int first,                     /* First argument to check (usually 1) */
+    LSX_PARAM_OUT            lsx_getopt_t * state)          /* State object to initialize */
 {
-  REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
-} ordering;
-
-/* Value of POSIXLY_CORRECT environment variable.  */
-static char *posixly_correct;
-
-#ifdef  __GNU_LIBRARY__
-/* We want to avoid inclusion of string.h with non-GNU libraries
-   because there are many ways it can cause trouble.
-   On some systems, it contains special magic macros that don't work
-   in GCC.  */
-# include <string.h>
-# define my_index       strchr
-#else
-
-# if HAVE_STRING_H
-#  include <string.h>
-# else
-#  include <strings.h>
-# endif
-
-/* Avoid depending on library functions or files
-   whose names are inconsistent.  */
-
-#ifndef getenv
-extern char *getenv (char const *);
-#endif
-
-static char *
-my_index (char const * str, int chr)
-{
-  while (*str)
+    assert(argc >= 0);
+    assert(argv != NULL);
+    assert(shortopts);
+    assert(first >= 0);
+    assert(first <= argc);
+    assert(state);
+    if (state)
     {
-      if (*str == chr)
-        return (char *) str;
-      str++;
-    }
-  return 0;
-}
-
-/* If using GCC, we can safely declare strlen this way.
-   If not using GCC, it is ok not to declare it.  */
-#ifdef __GNUC__
-/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
-   That was relevant to code that was here before.  */
-# if (!defined __STDC__ || !__STDC__) && !defined strlen
-/* gcc with -traditional declares the built-in strlen to return int,
-   and has done so at least since version 2.4.5. -- rms.  */
-extern int strlen (const char *);
-# endif /* not __STDC__ */
-#endif /* __GNUC__ */
-
-#endif /* not __GNU_LIBRARY__ */
-
-/* Handle permutation of arguments.  */
-
-/* Describe the part of ARGV that contains non-options that have
-   been skipped.  `first_nonopt' is the index in ARGV of the first of them;
-   `last_nonopt' is the index after the last of them.  */
-
-static int first_nonopt;
-static int last_nonopt;
-
-#ifdef _LIBC
-/* Stored original parameters.
-   XXX This is no good solution.  We should rather copy the args so
-   that we can compare them later.  But we must not use malloc(3).  */
-extern int __libc_argc;
-extern char **__libc_argv;
-
-/* Bash 2.0 gives us an environment variable containing flags
-   indicating ARGV elements that should not be considered arguments.  */
-
-# ifdef USE_NONOPTION_FLAGS
-/* Defined in getopt_init.c  */
-extern char *__getopt_nonoption_flags;
-
-static int nonoption_flags_max_len;
-static int nonoption_flags_len;
-# endif
-
-# ifdef USE_NONOPTION_FLAGS
-#  define SWAP_FLAGS(ch1, ch2) \
-  if (nonoption_flags_len > 0)                                                \
-    {                                                                         \
-      char __tmp = __getopt_nonoption_flags[ch1];                             \
-      __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2];          \
-      __getopt_nonoption_flags[ch2] = __tmp;                                  \
-    }
-# else
-#  define SWAP_FLAGS(ch1, ch2)
-# endif
-#else   /* !_LIBC */
-# define SWAP_FLAGS(ch1, ch2)
-#endif  /* _LIBC */
-
-/* Exchange two adjacent subsequences of ARGV.
-   One subsequence is elements [first_nonopt,last_nonopt)
-   which contains all the non-options that have been skipped so far.
-   The other is elements [last_nonopt,optind), which contains all
-   the options processed since those non-options were skipped.
-
-   `first_nonopt' and `last_nonopt' are relocated so that they describe
-   the new indices of the non-options in ARGV after they are moved.  */
-
-#if defined __STDC__ && __STDC__
-static void exchange (char **);
-#endif
-
-static void
-exchange (argv)
-     char **argv;
-{
-  int bottom = first_nonopt;
-  int middle = last_nonopt;
-  int top = lsx_optind;
-  char *tem;
-
-  /* Exchange the shorter segment with the far end of the longer segment.
-     That puts the shorter segment into the right place.
-     It leaves the longer segment in the right place overall,
-     but it consists of two parts that need to be swapped next.  */
-
-#if defined _LIBC && defined USE_NONOPTION_FLAGS
-  /* First make sure the handling of the `__getopt_nonoption_flags'
-     string can work normally.  Our top argument must be in the range
-     of the string.  */
-  if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
-    {
-      /* We must extend the array.  The user plays games with us and
-         presents new arguments.  */
-      char *new_str = lsx_malloc (top + 1);
-      if (new_str == NULL)
-        nonoption_flags_len = nonoption_flags_max_len = 0;
-      else
+        if (argc < 0 ||
+            !argv ||
+            !shortopts ||
+            first < 0 ||
+            first > argc)
         {
-          memset (__mempcpy (new_str, __getopt_nonoption_flags,
-                             nonoption_flags_max_len),
-                  '\0', top + 1 - nonoption_flags_max_len);
-          nonoption_flags_max_len = top + 1;
-          __getopt_nonoption_flags = new_str;
+            memset(state, 0, sizeof(*state));
         }
-    }
-#endif
-
-  while (top > middle && middle > bottom)
-    {
-      if (top - middle > middle - bottom)
+        else
         {
-          /* Bottom segment is the short one.  */
-          int len = middle - bottom;
-          register int i;
-
-          /* Swap it with the top part of the top segment.  */
-          for (i = 0; i < len; i++)
-            {
-              tem = argv[bottom + i];
-              argv[bottom + i] = argv[top - (middle - bottom) + i];
-              argv[top - (middle - bottom) + i] = tem;
-              SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
-            }
-          /* Exclude the moved bottom segment from further swapping.  */
-          top -= len;
+            state->argc = argc;
+            state->argv = argv;
+            state->shortopts =
+                (shortopts[0] == '+' || shortopts[0] == '-') /* Requesting GNU special behavior? */
+                ? shortopts + 1 /* Ignore request. */
+                : shortopts; /* No special behavior requested. */
+            state->longopts = longopts;
+            state->flags = flags;
+            state->curpos = NULL;
+            state->ind = first;
+            state->opt = '?';
+            state->arg = NULL;
+            state->lngind = -1;
         }
-      else
-        {
-          /* Top segment is the short one.  */
-          int len = top - middle;
-          register int i;
-
-          /* Swap it with the bottom part of the bottom segment.  */
-          for (i = 0; i < len; i++)
-            {
-              tem = argv[bottom + i];
-              argv[bottom + i] = argv[middle + i];
-              argv[middle + i] = tem;
-              SWAP_FLAGS (bottom + i, middle + i);
-            }
-          /* Exclude the moved top segment from further swapping.  */
-          bottom += len;
-        }
     }
-
-  /* Update records for the slots the non-options now occupy.  */
-
-  first_nonopt += (lsx_optind - last_nonopt);
-  last_nonopt = lsx_optind;
 }
 
-/* Initialize the internal data when the first call is made.  */
-
-#if defined __STDC__ && __STDC__
-static const char *_getopt_initialize (int, char *const *, const char *);
-#endif
-static const char *
-_getopt_initialize (argc, argv, optstring)
-     int argc;
-     char *const *argv;
-     const char *optstring;
+static void CheckCurPosEnd(
+    LSX_PARAM_INOUT lsx_getopt_t * state)
 {
-  /* Start processing options with ARGV-element 1 (since ARGV-element 0
-     is the program name); the sequence of previously skipped
-     non-option ARGV-elements is empty.  */
-
-  first_nonopt = last_nonopt = lsx_optind;
-
-  nextchar = NULL;
-
-  posixly_correct = getenv ("POSIXLY_CORRECT");
-
-  /* Determine how to handle the ordering of options and nonoptions.  */
-
-  if (optstring[0] == '-')
+    if (!state->curpos[0])
     {
-      ordering = RETURN_IN_ORDER;
-      ++optstring;
+        state->curpos = NULL;
+        state->ind++;
     }
-  else if (optstring[0] == '+')
-    {
-      ordering = REQUIRE_ORDER;
-      ++optstring;
-    }
-  else if (posixly_correct != NULL)
-    ordering = REQUIRE_ORDER;
-  else
-    ordering = PERMUTE;
-
-#if defined _LIBC && defined USE_NONOPTION_FLAGS
-  if (posixly_correct == NULL
-      && argc == __libc_argc && argv == __libc_argv)
-    {
-      if (nonoption_flags_max_len == 0)
-        {
-          if (__getopt_nonoption_flags == NULL
-              || __getopt_nonoption_flags[0] == '\0')
-            nonoption_flags_max_len = -1;
-          else
-            {
-              const char *orig_str = __getopt_nonoption_flags;
-              int len = nonoption_flags_max_len = strlen (orig_str);
-              if (nonoption_flags_max_len < argc)
-                nonoption_flags_max_len = argc;
-              __getopt_nonoption_flags =
-                lsx_malloc (nonoption_flags_max_len);
-              if (__getopt_nonoption_flags == NULL)
-                nonoption_flags_max_len = -1;
-              else
-                memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
-                        '\0', nonoption_flags_max_len - len);
-            }
-        }
-      nonoption_flags_len = nonoption_flags_max_len;
-    }
-  else
-    nonoption_flags_len = 0;
-#else
-  (void)argc, (void)argv;
-#endif
-
-  return optstring;
 }
-
-/* Scan elements of ARGV (whose length is ARGC) for option characters
-   given in OPTSTRING.
 
-   If an element of ARGV starts with '-', and is not exactly "-" or "--",
-   then it is an option element.  The characters of this element
-   (aside from the initial '-') are option characters.  If `getopt'
-   is called repeatedly, it returns successively each of the option characters
-   from each of the option elements.
-
-   If `getopt' finds another option character, it returns that character,
-   updating `optind' and `nextchar' so that the next call to `getopt' can
-   resume the scan with the following option character or ARGV-element.
-
-   If there are no more option characters, `getopt' returns -1.
-   Then `optind' is the index in ARGV of the first ARGV-element
-   that is not an option.  (The ARGV-elements have been permuted
-   so that those that are not options now come last.)
-
-   OPTSTRING is a string containing the legitimate option characters.
-   If an option character is seen that is not listed in OPTSTRING,
-   return '?' after printing an error message.  If you set `opterr' to
-   zero, the error message is suppressed but we still return '?'.
-
-   If a char in OPTSTRING is followed by a colon, that means it wants an arg,
-   so the following text in the same ARGV-element, or the text of the following
-   ARGV-element, is returned in `optarg'.  Two colons mean an option that
-   wants an optional arg; if there is text in the current ARGV-element,
-   it is returned in `optarg', otherwise `optarg' is set to zero.
-
-   If OPTSTRING starts with `-' or `+', it requests different methods of
-   handling the non-option ARGV-elements.
-   See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
-
-   Long-named options begin with `--' instead of `-'.
-   Their names may be abbreviated as long as the abbreviation is unique
-   or is an exact match for some defined option.  If they have an
-   argument, it follows the option name in the same ARGV-element, separated
-   from the option name by a `=', or else the in next ARGV-element.
-   When `getopt' finds a long-named option, it returns 0 if that option's
-   `flag' field is nonzero, the value of the option's `val' field
-   if the `flag' field is zero.
-
-   The elements of ARGV aren't really const, because we permute them.
-   But we pretend they're const in the prototype to be compatible
-   with other systems.
-
-   LONGOPTS is a vector of `struct option' terminated by an
-   element containing a name which is zero.
-
-   LONGIND returns the index in LONGOPT of the long-named option found.
-   It is only valid when a long-named option has been found by the most
-   recent call.
-
-   If LONG_ONLY is nonzero, '-' as well as '--' can introduce
-   long-named options.  */
-
 int
-_getopt_internal (
-     int argc,
-     char *const *argv,
-     const char *optstring,
-     const struct option *longopts,
-     int *longind,
-     int long_only);
-int
-_getopt_internal (
-     int argc,
-     char *const *argv,
-     const char *optstring,
-     const struct option *longopts,
-     int *longind,
-     int long_only)
+SOX_API lsx_getopt(
+    LSX_PARAM_INOUT lsx_getopt_t * state)
 {
-  int print_errors = opterr;
-  if (optstring[0] == ':')
-    print_errors = 0;
-
-  if (argc < 1)
-    return -1;
-
-  lsx_optarg = NULL;
-
-  if (lsx_optind == 0 || !__getopt_initialized)
+    int oerr;
+    assert(state);
+    if (!state)
     {
-      if (lsx_optind == 0)
-        lsx_optind = 1;     /* Don't scan ARGV[0], the program name.  */
-      optstring = _getopt_initialize (argc, argv, optstring);
-      __getopt_initialized = 1;
+        lsx_fail("lsx_getopt called with state=NULL");
+        return -1;
     }
 
-  /* Test whether ARGV[optind] points to a non-option argument.
-     Either it does not have option syntax, or there is an environment flag
-     from the shell indicating it is not an option.  The later information
-     is only used when the used in the GNU libc.  */
-#if defined _LIBC && defined USE_NONOPTION_FLAGS
-# define NONOPTION_P (argv[lsx_optind][0] != '-' || argv[lsx_optind][1] == '\0'       \
-                      || (lsx_optind < nonoption_flags_len                        \
-                          && __getopt_nonoption_flags[lsx_optind] == '1'))
-#else
-# define NONOPTION_P (argv[lsx_optind][0] != '-' || argv[lsx_optind][1] == '\0')
-#endif
+    assert(state->argc >= 0);
+    assert(state->argv != NULL);
+    assert(state->shortopts);
+    assert(state->ind >= 0);
+    assert(state->ind <= state->argc + 1);
 
-  if (nextchar == NULL || *nextchar == '\0')
-    {
-      /* Advance to the next ARGV-element.  */
+    oerr = 0 != (state->flags & lsx_getopt_flag_opterr);
+    state->opt = 0;
+    state->arg = NULL;
+    state->lngind = -1;
 
-      /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
-         moved back by the user (who may also have changed the arguments).  */
-      if (last_nonopt > lsx_optind)
-        last_nonopt = lsx_optind;
-      if (first_nonopt > lsx_optind)
-        first_nonopt = lsx_optind;
-
-      if (ordering == PERMUTE)
-        {
-          /* If we have just processed some options following some non-options,
-             exchange them so that the options come first.  */
-
-          if (first_nonopt != last_nonopt && last_nonopt != lsx_optind)
-            exchange ((char **) argv);
-          else if (last_nonopt != lsx_optind)
-            first_nonopt = lsx_optind;
-
-          /* Skip any additional non-options
-             and extend the range of non-options previously skipped.  */
-
-          while (lsx_optind < argc && NONOPTION_P)
-            lsx_optind++;
-          last_nonopt = lsx_optind;
-        }
-
-      /* The special ARGV-element `--' means premature end of options.
-         Skip it like a null option,
-         then exchange with previous non-options as if it were an option,
-         then skip everything else like a non-option.  */
-
-      if (lsx_optind != argc && !strcmp (argv[lsx_optind], "--"))
-        {
-          lsx_optind++;
-
-          if (first_nonopt != last_nonopt && last_nonopt != lsx_optind)
-            exchange ((char **) argv);
-          else if (first_nonopt == last_nonopt)
-            first_nonopt = lsx_optind;
-          last_nonopt = argc;
-
-          lsx_optind = argc;
-        }
-
-      /* If we have done all the ARGV-elements, stop the scan
-         and back over any non-options that we skipped and permuted.  */
-
-      if (lsx_optind == argc)
-        {
-          /* Set the next-arg-index to point at the non-options
-             that we previously skipped, so the caller will digest them.  */
-          if (first_nonopt != last_nonopt)
-            lsx_optind = first_nonopt;
-          nextchar = NULL;  /* SoX */
-          return -1;
-        }
-
-      /* If we have come to a non-option and did not permute it,
-         either stop the scan or describe it to the caller and pass it by.  */
-
-      if (NONOPTION_P)
-        {
-          if (ordering == REQUIRE_ORDER)
-            return -1;
-          lsx_optarg = argv[lsx_optind++];
-          return 1;
-        }
-
-      /* We have found another option-ARGV-element.
-         Skip the initial punctuation.  */
-
-      nextchar = (argv[lsx_optind] + 1
-                  + (longopts != NULL && argv[lsx_optind][1] == '-'));
+    if (state->argc < 0 ||
+        !state->argv ||
+        !state->shortopts ||
+        state->ind < 0)
+    { /* programmer error */
+        lsx_fail("lsx_getopt called with invalid information");
+        state->curpos = NULL;
+        return -1;
     }
+    else if (
+        state->argc <= state->ind ||
+        !state->argv[state->ind] ||
+        state->argv[state->ind][0] != '-' ||
+        state->argv[state->ind][1] == '\0')
+    { /* return no more options */
+        state->curpos = NULL;
+        return -1;
+    }
+    else if (state->argv[state->ind][1] == '-' && state->argv[state->ind][2] == '\0')
+    { /* skip "--", return no more options. */
+        state->curpos = NULL;
+        state->ind++;
+        return -1;
+    }
+    else
+    { /* Look for the next option */
+        char const * current = state->argv[state->ind];
+        char const * param = current + 1;
 
-  /* Decode the current option-ARGV-element.  */
+        if (state->curpos == NULL ||
+            state->curpos <= param ||
+            param + strlen(param) <= state->curpos)
+        { /* Start parsing a new parameter - check for a long option */
+            state->curpos = NULL;
 
-  /* Check whether the ARGV-element is a long option.
+            if (state->longopts &&
+                (param[0] == '-' || (state->flags & lsx_getopt_flag_longonly)))
+            {
+                size_t nameLen;
+                int doubleDash = param[0] == '-';
+                if (doubleDash)
+                {
+                    param++;
+                }
 
-     If long_only and the ARGV-element has the form "-f", where f is
-     a valid short option, don't consider it an abbreviated form of
-     a long option that starts with f.  Otherwise there would be no
-     way to give the -f short option.
+                for (nameLen = 0; param[nameLen] && param[nameLen] != '='; nameLen++)
+                {}
 
-     On the other hand, if there's a long option "fubar" and
-     the ARGV-element is "-fu", do consider that an abbreviation of
-     the long option, just like "--fu", and not "-f" with arg "u".
+                /* For single-dash, you have to specify at least two letters in the name. */
+                if (doubleDash || nameLen >= 2)
+                {
+                    lsx_option_t const * pCur;
+                    lsx_option_t const * pMatch = NULL;
+                    int matches = 0;
 
-     This distinction seems to be the most useful approach.  */
-
-  if (longopts != NULL
-      && (argv[lsx_optind][1] == '-'
-          || (long_only && (argv[lsx_optind][2] || !my_index (optstring, argv[lsx_optind][1])))))
-    {
-      char *nameend;
-      const struct option *p;
-      const struct option *pfound = NULL;
-      int exact = 0;
-      int ambig = 0;
-      int indfound = -1;
-      int option_index;
-
-      for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
-        /* Do nothing.  */ ;
-
-      /* Test all long options for either exact match
-         or abbreviated matches.  */
-      for (p = longopts, option_index = 0; p->name; p++, option_index++)
-        if (!strncmp (p->name, nextchar, (size_t)(nameend - nextchar)))
-          {
-            if ((unsigned int) (nameend - nextchar)
-                == (unsigned int) strlen (p->name))
-              {
-                /* Exact match found.  */
-                pfound = p;
-                indfound = option_index;
-                exact = 1;
-                break;
-              }
-            else if (pfound == NULL)
-              {
-                /* First nonexact match found.  */
-                pfound = p;
-                indfound = option_index;
-              }
-            else if (long_only
-                     || pfound->has_arg != p->has_arg
-                     || pfound->flag != p->flag
-                     || pfound->val != p->val)
-              /* Second or later nonexact match found.  */
-              ambig = 1;
-          }
+                    for (pCur = state->longopts; pCur->name; pCur++)
+                    {
+                        if (0 == strncmp(pCur->name, param, nameLen))
+                        { /* Prefix match. */
+                            matches++;
+                            pMatch = pCur;
+                            if (nameLen == strlen(pCur->name))
+                            { /* Exact match - no ambiguity, stop search. */
+                                matches = 1;
+                                break;
+                            }
+                        }
+                    }
 
-      if (ambig && !exact)
-        {
-          if (print_errors)
-            {
-#if defined _LIBC && defined USE_IN_LIBIO
-              char *buf;
+                    if (matches == 1)
+                    { /* Matched. */
+                        state->ind++;
 
-              if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"),
-                              argv[0], argv[lsx_optind]) >= 0)
-                {
-
-                  if (_IO_fwide (stderr, 0) > 0)
-                    __fwprintf (stderr, L"%s", buf);
-                  else
-                    fputs (buf, stderr);
-
-                  free (buf);
-                }
-#else
-              fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
-                       argv[0], argv[lsx_optind]);
-#endif
-            }
-          nextchar += strlen (nextchar);
-          lsx_optind++;
-          optopt = 0;
-          return '?';
-        }
-
-      if (pfound != NULL)
-        {
-          option_index = indfound;
-          lsx_optind++;
-          if (*nameend)
-            {
-              /* Don't test has_arg with >, because some C compilers don't
-                 allow it to be used on enums.  */
-              if (pfound->has_arg)
-                lsx_optarg = nameend + 1;
-              else
-                {
-                  if (print_errors)
-                    {
-#if defined _LIBC && defined USE_IN_LIBIO
-                      char *buf;
-                      int n;
-#endif
+                        if (param[nameLen])
+                        { /* --name=value */
+                            if (pMatch->has_arg)
+                            { /* Required or optional arg - done. */
+                                state->arg = param + nameLen + 1;
+                            }
+                            else
+                            { /* No arg expected. */
+                                if (oerr)
+                                {
+                                    lsx_warn("`%s' did not expect an argument from `%s'",
+                                        pMatch->name,
+                                        current);
+                                }
+                                return '?';
+                            }
+                        }
+                        else if (pMatch->has_arg == lsx_option_arg_required)
+                        { /* Arg required. */
+                            state->arg = state->argv[state->ind];
+                            state->ind++;
+                            if (state->ind > state->argc)
+                            {
+                                if (oerr)
+                                {
+                                    lsx_warn("`%s' requires an argument from `%s'",
+                                        pMatch->name,
+                                        current);
+                                }
+                                return state->shortopts[0] == ':' ? ':' : '?'; /* Missing required value. */
+                            }
+                        }
 
-                      if (argv[lsx_optind - 1][1] == '-')
+                        state->lngind = pMatch - state->longopts;
+                        if (pMatch->flag)
                         {
-                          /* --option */
-#if defined _LIBC && defined USE_IN_LIBIO
-                          n = __asprintf (&buf, _("\
-%s: option `--%s' doesn't allow an argument\n"),
-                                          argv[0], pfound->name);
-#else
-                          fprintf (stderr, _("\
-%s: option `--%s' doesn't allow an argument\n"),
-                                   argv[0], pfound->name);
-#endif
+                            *pMatch->flag = pMatch->val;
+                            return 0;
                         }
-                      else
+                        else
                         {
-                          /* +option or -option */
-#if defined _LIBC && defined USE_IN_LIBIO
-                          n = __asprintf (&buf, _("\
-%s: option `%c%s' doesn't allow an argument\n"),
-                                          argv[0], argv[lsx_optind - 1][0],
-                                          pfound->name);
-#else
-                          fprintf (stderr, _("\
-%s: option `%c%s' doesn't allow an argument\n"),
-                                   argv[0], argv[lsx_optind - 1][0], pfound->name);
-#endif
+                            return pMatch->val;
                         }
-
-#if defined _LIBC && defined USE_IN_LIBIO
-                      if (n >= 0)
+                    }
+                    else if (matches == 0 && doubleDash)
+                    { /* No match */
+                        if (oerr)
                         {
-                          if (_IO_fwide (stderr, 0) > 0)
-                            __fwprintf (stderr, L"%s", buf);
-                          else
-                            fputs (buf, stderr);
-
-                          free (buf);
+                            lsx_warn("parameter not recognized from `%s'", current);
                         }
-#endif
+                        state->ind++;
+                        return '?';
                     }
-
-                  nextchar += strlen (nextchar);
-
-                  optopt = pfound->val;
-                  return '?';
-                }
-            }
-          else if (pfound->has_arg == 1)
-            {
-              if (lsx_optind < argc)
-                lsx_optarg = argv[lsx_optind++];
-              else
-                {
-                  if (print_errors)
-                    {
-#if defined _LIBC && defined USE_IN_LIBIO
-                      char *buf;
-
-                      if (__asprintf (&buf, _("\
-%s: option `%s' requires an argument\n"),
-                                      argv[0], argv[lsx_optind - 1]) >= 0)
-                        {
-                          if (_IO_fwide (stderr, 0) > 0)
-                            __fwprintf (stderr, L"%s", buf);
-                          else
-                            fputs (buf, stderr);
-
-                          free (buf);
+                    else if (matches > 1)
+                    { /* Ambiguous. */
+                        if (oerr)
+                        {
+                            lsx_warn("parameter `%s' is ambiguous:", current);
+                            for (pCur = state->longopts; pCur->name; pCur++)
+                            {
+                                if (0 == strncmp(pCur->name, param, nameLen))
+                                {
+                                    lsx_warn("parameter `%s' could be `--%s'", current, pCur->name);
+                                }
+                            }
                         }
-#else
-                      fprintf (stderr,
-                               _("%s: option `%s' requires an argument\n"),
-                               argv[0], argv[lsx_optind - 1]);
-#endif
+                        state->ind++;
+                        return '?';
                     }
-                  nextchar += strlen (nextchar);
-                  optopt = pfound->val;
-                  return optstring[0] == ':' ? ':' : '?';
                 }
             }
-          nextchar += strlen (nextchar);
-          if (longind != NULL)
-            *longind = option_index;
-          if (pfound->flag)
-            {
-              *(pfound->flag) = pfound->val;
-              return 0;
-            }
-          return pfound->val;
+
+            state->curpos = param;
         }
 
-      /* Can't find it as a long option.  If this is not getopt_long_only,
-         or the option starts with '--' or is not a valid short
-         option, then it's an error.
-         Otherwise interpret it as a short option.  */
-      if (!long_only || argv[lsx_optind][1] == '-'
-          || my_index (optstring, *nextchar) == NULL)
-        {
-          if (print_errors)
+        state->opt = state->curpos[0];
+        if (state->opt == ':')
+        { /* ':' is never a valid short option character */
+            if (oerr)
             {
-#if defined _LIBC && defined USE_IN_LIBIO
-              char *buf;
-              int n;
-#endif
-
-              if (argv[lsx_optind][1] == '-')
-                {
-                  /* --option */
-#if defined _LIBC && defined USE_IN_LIBIO
-                  n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"),
-                                  argv[0], nextchar);
-#else
-                  fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
-                           argv[0], nextchar);
-#endif
-                }
-              else
-                {
-                  /* +option or -option */
-#if defined _LIBC && defined USE_IN_LIBIO
-                  n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"),
-                                  argv[0], argv[lsx_optind][0], nextchar);
-#else
-                  fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
-                           argv[0], argv[lsx_optind][0], nextchar);
-#endif
-                }
-
-#if defined _LIBC && defined USE_IN_LIBIO
-              if (n >= 0)
-                {
-                  if (_IO_fwide (stderr, 0) > 0)
-                    __fwprintf (stderr, L"%s", buf);
-                  else
-                    fputs (buf, stderr);
-
-                  free (buf);
-                }
-#endif
+                lsx_warn("option `%c' not recognized", state->opt);
             }
-          nextchar = (char *) "";
-          lsx_optind++;
-          optopt = 0;
-          return '?';
+            state->curpos++;
+            CheckCurPosEnd(state);
+            return '?'; /* unrecognized option */
         }
-    }
-
-  /* Look at and handle the next short option-character.  */
-
-  {
-    char c = *nextchar++;
-    char *temp = my_index (optstring, c);
-
-    /* Increment `optind' when we start to process its last character.  */
-    if (temp && *nextchar == '\0') /* SoX */
-      ++lsx_optind;
-
-    if (temp == NULL || c == ':')
-      {
-        if (print_errors)
-          {
-#if defined _LIBC && defined USE_IN_LIBIO
-              char *buf;
-              int n;
-#endif
-
-            if (posixly_correct)
-              {
-                /* 1003.2 specifies the format of this message.  */
-#if defined _LIBC && defined USE_IN_LIBIO
-                n = __asprintf (&buf, _("%s: illegal option -- %c\n"),
-                                argv[0], c);
-#else
-                fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c);
-#endif
-              }
-            else
-              {
-#if defined _LIBC && defined USE_IN_LIBIO
-                n = __asprintf (&buf, _("%s: invalid option -- %c\n"),
-                                argv[0], c);
-#else
-                fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c);
-#endif
-              }
-
-#if defined _LIBC && defined USE_IN_LIBIO
-            if (n >= 0)
-              {
-                if (_IO_fwide (stderr, 0) > 0)
-                  __fwprintf (stderr, L"%s", buf);
-                else
-                  fputs (buf, stderr);
-
-                free (buf);
-              }
-#endif
-          }
-        nextchar = (char *) "";  /* SoX */
-        optopt = c;
-        return '?';
-      }
-    /* Convenience. Treat POSIX -W foo same as long option --foo */
-    if (temp[0] == 'W' && temp[1] == ';')
-      {
-        char *nameend;
-        const struct option *p;
-        const struct option *pfound = NULL;
-        int exact = 0;
-        int ambig = 0;
-        int indfound = 0;
-        int option_index;
-
-        /* This is an option that requires an argument.  */
-        if (*nextchar != '\0')
-          {
-            lsx_optarg = nextchar;
-            /* If we end this ARGV-element by taking the rest as an arg,
-               we must advance to the next element now.  */
-            lsx_optind++;
-          }
-        else if (lsx_optind == argc)
-          {
-            if (print_errors)
-              {
-                /* 1003.2 specifies the format of this message.  */
-#if defined _LIBC && defined USE_IN_LIBIO
-                char *buf;
-
-                if (__asprintf (&buf,
-                                _("%s: option requires an argument -- %c\n"),
-                                argv[0], c) >= 0)
-                  {
-                    if (_IO_fwide (stderr, 0) > 0)
-                      __fwprintf (stderr, L"%s", buf);
-                    else
-                      fputs (buf, stderr);
-
-                    free (buf);
-                  }
-#else
-                fprintf (stderr, _("%s: option requires an argument -- %c\n"),
-                         argv[0], c);
-#endif
-              }
-            optopt = c;
-            if (optstring[0] == ':')
-              c = ':';
-            else
-              c = '?';
-            return c;
-          }
         else
-          /* We already incremented `optind' once;
-             increment it again when taking next ARGV-elt as argument.  */
-          lsx_optarg = argv[lsx_optind++];
+        { /* Short option needs to be matched from option list */
+            char const * pShortopt = strchr(state->shortopts, state->opt);
+            state->curpos++;
 
-        /* optarg is now the argument, see if it's in the
-           table of longopts.  */
-
-        for (nextchar = nameend = lsx_optarg; *nameend && *nameend != '='; nameend++)
-          /* Do nothing.  */ ;
-
-        /* Test all long options for either exact match
-           or abbreviated matches.  */
-        for (p = longopts, option_index = 0; p->name; p++, option_index++)
-          if (!strncmp (p->name, nextchar, (size_t)(nameend - nextchar)))
-            {
-              if ((unsigned int) (nameend - nextchar) == strlen (p->name))
+            if (!pShortopt)
+            { /* unrecognized option */
+                if (oerr)
                 {
-                  /* Exact match found.  */
-                  pfound = p;
-                  indfound = option_index;
-                  exact = 1;
-                  break;
+                    lsx_warn("option `%c' not recognized", state->opt);
                 }
-              else if (pfound == NULL)
-                {
-                  /* First nonexact match found.  */
-                  pfound = p;
-                  indfound = option_index;
-                }
-              else
-                /* Second or later nonexact match found.  */
-                ambig = 1;
+                CheckCurPosEnd(state);
+                return '?';
             }
-        if (ambig && !exact)
-          {
-            if (print_errors)
-              {
-#if defined _LIBC && defined USE_IN_LIBIO
-                char *buf;
-
-                if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"),
-                                argv[0], argv[lsx_optind]) >= 0)
-                  {
-                    if (_IO_fwide (stderr, 0) > 0)
-                      __fwprintf (stderr, L"%s", buf);
-                    else
-                      fputs (buf, stderr);
-
-                    free (buf);
-                  }
-#else
-                fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
-                         argv[0], argv[lsx_optind]);
-#endif
-              }
-            nextchar += strlen (nextchar);
-            lsx_optind++;
-            return '?';
-          }
-        if (pfound != NULL)
-          {
-            option_index = indfound;
-            if (*nameend)
-              {
-                /* Don't test has_arg with >, because some C compilers don't
-                   allow it to be used on enums.  */
-                if (pfound->has_arg)
-                  lsx_optarg = nameend + 1;
+            else if (pShortopt[1] == ':' && state->curpos[0])
+            { /* Return the rest of the parameter as the option's value */
+                state->arg = state->curpos;
+                state->curpos = NULL;
+                state->ind++;
+                return state->opt;
+            }
+            else if (pShortopt[1] == ':' && pShortopt[2] != ':')
+            { /* Option requires a value */
+                state->curpos = NULL;
+                state->ind++;
+                state->arg = state->argv[state->ind];
+                state->ind++;
+                if (state->ind <= state->argc)
+                { /* A value was present, so we're good. */
+                    return state->opt;
+                }
                 else
-                  {
-                    if (print_errors)
-                      {
-#if defined _LIBC && defined USE_IN_LIBIO
-                        char *buf;
-
-                        if (__asprintf (&buf, _("\
-%s: option `-W %s' doesn't allow an argument\n"),
-                                        argv[0], pfound->name) >= 0)
-                          {
-                            if (_IO_fwide (stderr, 0) > 0)
-                              __fwprintf (stderr, L"%s", buf);
-                            else
-                              fputs (buf, stderr);
-
-                            free (buf);
-                          }
-#else
-                        fprintf (stderr, _("\
-%s: option `-W %s' doesn't allow an argument\n"),
-                                 argv[0], pfound->name);
-#endif
-                      }
-
-                    nextchar += strlen (nextchar);
-                    return '?';
-                  }
-              }
-            else if (pfound->has_arg == 1)
-              {
-                if (lsx_optind < argc)
-                  lsx_optarg = argv[lsx_optind++];
-                else
-                  {
-                    if (print_errors)
-                      {
-#if defined _LIBC && defined USE_IN_LIBIO
-                        char *buf;
-
-                        if (__asprintf (&buf, _("\
-%s: option `%s' requires an argument\n"),
-                                        argv[0], argv[lsx_optind - 1]) >= 0)
-                          {
-                            if (_IO_fwide (stderr, 0) > 0)
-                              __fwprintf (stderr, L"%s", buf);
-                            else
-                              fputs (buf, stderr);
-
-                            free (buf);
-                          }
-#else
-                        fprintf (stderr,
-                                 _("%s: option `%s' requires an argument\n"),
-                                 argv[0], argv[lsx_optind - 1]);
-#endif
-                      }
-                    nextchar += strlen (nextchar);
-                    return optstring[0] == ':' ? ':' : '?';
-                  }
-              }
-            nextchar += strlen (nextchar);
-            if (longind != NULL)
-              *longind = option_index;
-            if (pfound->flag)
-              {
-                *(pfound->flag) = pfound->val;
-                return 0;
-              }
-            return pfound->val;
-          }
-          nextchar = NULL;
-          return 'W';   /* Let the application handle it.   */
-      }
-    if (temp[1] == ':')
-      {
-        if (temp[2] == ':')
-          {
-            /* This is an option that accepts an argument optionally.  */
-            if (*nextchar != '\0')
-              {
-                lsx_optarg = nextchar;
-                lsx_optind++;
-              }
-            else
-              lsx_optarg = NULL;
-            nextchar = NULL;
-          }
-        else
-          {
-            /* This is an option that requires an argument.  */
-            if (*nextchar != '\0')
-              {
-                lsx_optarg = nextchar;
-                /* If we end this ARGV-element by taking the rest as an arg,
-                   we must advance to the next element now.  */
-                lsx_optind++;
-              }
-            else if (lsx_optind == argc)
-              {
-                if (print_errors)
-                  {
-                    /* 1003.2 specifies the format of this message.  */
-#if defined _LIBC && defined USE_IN_LIBIO
-                    char *buf;
-
-                    if (__asprintf (&buf, _("\
-%s: option requires an argument -- %c\n"),
-                                    argv[0], c) >= 0)
-                      {
-                        if (_IO_fwide (stderr, 0) > 0)
-                          __fwprintf (stderr, L"%s", buf);
-                        else
-                          fputs (buf, stderr);
-
-                        free (buf);
-                      }
-#else
-                    fprintf (stderr,
-                             _("%s: option requires an argument -- %c\n"),
-                             argv[0], c);
-#endif
-                  }
-                optopt = c;
-                if (optstring[0] == ':')
-                  c = ':';
-                else
-                  c = '?';
-              }
-            else
-              /* We already incremented `optind' once;
-                 increment it again when taking next ARGV-elt as argument.  */
-              lsx_optarg = argv[lsx_optind++];
-            nextchar = NULL;
-          }
-      }
-    return c;
-  }
+                {  /* Missing required value. */
+                    if (oerr)
+                    {
+                        lsx_warn("option `%c' requires an argument",
+                            state->opt);
+                    }
+                    return state->shortopts[0] == ':' ? ':' : '?';
+                }
+            }
+            else
+            { /* Option without a value. */
+                CheckCurPosEnd(state);
+                return state->opt;
+            }
+        }
+    }
 }
 
-int
-lsx_getopt (int argc, char * const * argv, char const * optstring)
-{
-  return _getopt_internal (argc, argv, optstring,
-                           (const struct option *) 0,
-                           (int *) 0,
-                           0);
-}
+#ifdef TEST_GETOPT
 
-#endif  /* Not ELIDE_CODE.  */
-
-#ifdef TEST
+#include <stdio.h>
 
-/* Compile with -DTEST to make an executable for use in testing
-   the above definition of `getopt'.  */
-
-int
-main (argc, argv)
-     int argc;
-     char **argv;
+int main(int argc, char const * argv[])
 {
-  int c;
-  int digit_optind = 0;
-
-  while (1)
+    static int help = 0;
+    static lsx_option_t longopts[] =
     {
-      int this_option_optind = lsx_optind ? lsx_optind : 1;
+        {"a11",  0, 0, 101},
+        {"a12",  0, 0, 102},
+        {"a122", 0, 0, 103},
+        {"rarg", 1, 0, 104},
+        {"oarg", 2, 0, 105},
+        {"help", 0, &help, 106},
+        {0}
+    };
 
-      c = getopt (argc, argv, "abc:d:0123456789");
-      if (c == -1)
-        break;
+    int ch;
+    lsx_getopt_t state;
+    lsx_getopt_init(argc, argv, "abc:d:v::0123456789", longopts, sox_true, 1, &state);
 
-      switch (c)
-        {
-        case '0':
-        case '1':
-        case '2':
-        case '3':
-        case '4':
-        case '5':
-        case '6':
-        case '7':
-        case '8':
-        case '9':
-          if (digit_optind != 0 && digit_optind != this_option_optind)
-            printf ("digits occur in two different argv-elements.\n");
-          digit_optind = this_option_optind;
-          printf ("option %c\n", c);
-          break;
-
-        case 'a':
-          printf ("option a\n");
-          break;
-
-        case 'b':
-          printf ("option b\n");
-          break;
-
-        case 'c':
-          printf ("option c with value `%s'\n", lsx_optarg);
-          break;
-
-        case '?':
-          break;
-
-        default:
-          printf ("?? getopt returned character code 0%o ??\n", c);
-        }
-    }
-
-  if (lsx_optind < argc)
+    while (-1 != (ch = lsx_getopt(&state)))
     {
-      printf ("non-option ARGV-elements: ");
-      while (lsx_optind < argc)
-        printf ("%s ", argv[lsx_optind++]);
-      printf ("\n");
+        printf(
+            "H=%d ch=%d, ind=%d opt=%d lng=%d arg=%s\n",
+            help,
+            ch,
+            state.ind,
+            state.opt,
+            state.lngind,
+            state.arg ? state.arg : "NULL");
     }
 
-  exit (0);
+    return 0;
 }
 
-#endif /* TEST */
+#endif /* TEST_GETOPT */
--- a/src/getopt1.c
+++ /dev/null
@@ -1,221 +1,0 @@
-#include "soxconfig.h"
-/* getopt_long and getopt_long_only entry points for GNU getopt.
-   Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98
-     Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#if 0
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#endif
-
-#if 0
-#ifdef _LIBC
-# include <getopt.h>
-#else
-# include "getopt.h"
-#endif
-#endif
-#include "sgetopt.h"
-
-#if !defined __STDC__ || !__STDC__
-/* This is a separate conditional since some stdc systems
-   reject `defined (const)'.  */
-#ifndef const
-#define const
-#endif
-#endif
-
-#include <stdio.h>
-
-/* Comment out all this code if we are using the GNU C Library, and are not
-   actually compiling the library itself.  This code is part of the GNU C
-   Library, but also included in many other GNU distributions.  Compiling
-   and linking in this code is a waste when using the GNU C library
-   (especially if it is a shared library).  Rather than having every GNU
-   program understand `configure --with-gnu-libc' and omit the object files,
-   it is simpler to just do this in the source for each such file.  */
-
-#define GETOPT_INTERFACE_VERSION 2
-#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
-#include <gnu-versions.h>
-#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
-#define ELIDE_CODE
-#endif
-#endif
-
-/* Always compile for SoX. */
-#undef ELIDE_CODE
-
-#ifndef ELIDE_CODE
-
-
-/* This needs to come after some library #include
-   to get __GNU_LIBRARY__ defined.  */
-#ifdef __GNU_LIBRARY__
-#include <stdlib.h>
-#endif
-
-#ifndef NULL
-#define NULL 0
-#endif
-
-
-int
-lsx_getopt_long (
-     int argc,
-     char *const *argv,
-     const char *options,
-     const struct option *long_options,
-     int *opt_index);
-int
-lsx_getopt_long (
-     int argc,
-     char *const *argv,
-     const char *options,
-     const struct option *long_options,
-     int *opt_index)
-{
-  return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
-}
-
-/* Like getopt_long, but '-' as well as '--' can indicate a long option.
-   If an option that starts with '-' (not '--') doesn't match a long option,
-   but does match a short option, it is parsed as a short option
-   instead.  */
-
-int
-getopt_long_only (
-     int argc,
-     char *const *argv,
-     const char *options,
-     const struct option *long_options,
-     int *opt_index);
-int
-getopt_long_only (
-     int argc,
-     char *const *argv,
-     const char *options,
-     const struct option *long_options,
-     int *opt_index)
-{
-  return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
-}
-
-# ifdef _LIBC
-libc_hidden_def (lsx_getopt_long)
-libc_hidden_def (getopt_long_only)
-# endif
-
-#endif  /* Not ELIDE_CODE.  */
-
-#ifdef TEST
-
-#include <stdio.h>
-
-
-int
-main (argc, argv)
-     int argc;
-     char **argv;
-{
-  int c;
-  int digit_optind = 0;
-
-  while (1)
-    {
-      int this_option_optind = optind ? optind : 1;
-      int option_index = 0;
-      static struct option long_options[] =
-      {
-        {"add", 1, 0, 0},
-        {"append", 0, 0, 0},
-        {"delete", 1, 0, 0},
-        {"verbose", 0, 0, 0},
-        {"create", 0, 0, 0},
-        {"file", 1, 0, 0},
-        {0, 0, 0, 0}
-      };
-
-      c = lsx_getopt_long (argc, argv, "abc:d:0123456789",
-                       long_options, &option_index);
-      if (c == -1)
-        break;
-
-      switch (c)
-        {
-        case 0:
-          printf ("option %s", long_options[option_index].name);
-          if (optarg)
-            printf (" with arg %s", optarg);
-          printf ("\n");
-          break;
-
-        case '0':
-        case '1':
-        case '2':
-        case '3':
-        case '4':
-        case '5':
-        case '6':
-        case '7':
-        case '8':
-        case '9':
-          if (digit_optind != 0 && digit_optind != this_option_optind)
-            printf ("digits occur in two different argv-elements.\n");
-          digit_optind = this_option_optind;
-          printf ("option %c\n", c);
-          break;
-
-        case 'a':
-          printf ("option a\n");
-          break;
-
-        case 'b':
-          printf ("option b\n");
-          break;
-
-        case 'c':
-          printf ("option c with value `%s'\n", optarg);
-          break;
-
-        case 'd':
-          printf ("option d with value `%s'\n", optarg);
-          break;
-
-        case '?':
-          break;
-
-        default:
-          printf ("?? getopt returned character code 0%o ??\n", c);
-        }
-    }
-
-  if (optind < argc)
-    {
-      printf ("non-option ARGV-elements: ");
-      while (optind < argc)
-        printf ("%s ", argv[optind++]);
-      printf ("\n");
-    }
-
-  exit (0);
-}
-
-#endif /* TEST */
--- a/src/rate.c
+++ b/src/rate.c
@@ -25,7 +25,6 @@
 
 #include "sox_i.h"
 #include "fft4g.h"
-#include "sgetopt.h"
 #include "dft_filter.h"
 #include <assert.h>
 #include <string.h>
@@ -440,15 +439,17 @@
   priv_t * p = (priv_t *) effp->priv;
   int c;
   char * dummy_p, * found_at, * opts = "+i:b:p:MILasqlmhv", * qopts = opts +12;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, opts, NULL, lsx_getopt_flag_none, 1, &optstate);
 
   p->quality = -1;
   p->phase = 50;
   p->shared_ptr = &p->shared;
 
-  while ((c = lsx_getopt(argc, argv, opts)) != -1) switch (c) {
-    GETOPT_NUMERIC('i', coef_interp, 1 , 3)
-    GETOPT_NUMERIC('p', phase,  0 , 100)
-    GETOPT_NUMERIC('b', bandwidth,  100 - LSX_MAX_TBW3, 99.7)
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
+    GETOPT_NUMERIC(optstate, 'i', coef_interp, 1 , 3)
+    GETOPT_NUMERIC(optstate, 'p', phase,  0 , 100)
+    GETOPT_NUMERIC(optstate, 'b', bandwidth,  100 - LSX_MAX_TBW3, 99.7)
     case 'M': p->phase =  0; break;
     case 'I': p->phase = 25; break;
     case 'L': p->phase = 50; break;
@@ -455,9 +456,9 @@
     case 's': p->bandwidth = 99; break;
     case 'a': p->allow_aliasing = sox_true; break;
     default: if ((found_at = strchr(qopts, c))) p->quality = found_at - qopts;
-      else {lsx_fail("unknown option `-%c'", optopt); return lsx_usage(effp);}
+      else {lsx_fail("unknown option `-%c'", optstate.opt); return lsx_usage(effp);}
   }
-  argc -= lsx_optind, argv += lsx_optind;
+  argc -= optstate.ind, argv += optstate.ind;
 
   if ((unsigned)p->quality < 2 && (p->bandwidth || p->phase != 50 || p->allow_aliasing)) {
     lsx_fail("override options not allowed with this quality level");
--- a/src/sgetopt.h
+++ /dev/null
@@ -1,188 +1,0 @@
-/* Declarations for getopt.
-   Copyright (C) 1989-1994, 1996-1999, 2001 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#ifndef _SGETOPT_H
-#if defined __GNUC__
-  #pragma GCC system_header
-#elif defined __SUNPRO_CC
-  #pragma disable_warn
-#elif defined _MSC_VER
-  #pragma warning(push, 1)
-#endif
-
-#ifndef __need_getopt
-# define _GETOPT_H 1
-#endif
-
-/* If __GNU_LIBRARY__ is not already defined, either we are being used
-   standalone, or this is the first header included in the source file.
-   If we are being used with glibc, we need to include <features.h>, but
-   that does not exist if we are standalone.  So: if __GNU_LIBRARY__ is
-   not defined, include <ctype.h>, which will pull in <features.h> for us
-   if it's from glibc.  (Why ctype.h?  It's guaranteed to exist and it
-   doesn't flood the namespace with stuff the way some other headers do.)  */
-#if !defined __GNU_LIBRARY__
-# include <ctype.h>
-#endif
-
-#ifdef  __cplusplus
-extern "C" {
-#endif
-
-/* For communication from `getopt' to the caller.
-   When `getopt' finds an option that takes an argument,
-   the argument value is returned here.
-   Also, when `ordering' is RETURN_IN_ORDER,
-   each non-option ARGV-element is returned here.  */
-
-extern char *lsx_optarg;
-
-/* Index in ARGV of the next element to be scanned.
-   This is used for communication to and from the caller
-   and for communication between successive calls to `getopt'.
-
-   On entry to `getopt', zero means this is the first call; initialize.
-
-   When `getopt' returns -1, this is the index of the first of the
-   non-option elements that the caller should itself scan.
-
-   Otherwise, `optind' communicates from one call to the next
-   how much of ARGV has been scanned so far.  */
-
-extern int lsx_optind;
-
-/* Callers store zero here to inhibit the error message `getopt' prints
-   for unrecognized options.  */
-
-extern int opterr;
-
-/* Set to an option character which was unrecognized.  */
-
-extern int optopt;
-
-#ifndef __need_getopt
-/* Describe the long-named options requested by the application.
-   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
-   of `struct option' terminated by an element containing a name which is
-   zero.
-
-   The field `has_arg' is:
-   no_argument          (or 0) if the option does not take an argument,
-   required_argument    (or 1) if the option requires an argument,
-   optional_argument    (or 2) if the option takes an optional argument.
-
-   If the field `flag' is not NULL, it points to a variable that is set
-   to the value given in the field `val' when the option is found, but
-   left unchanged if the option is not found.
-
-   To have a long-named option do something other than set an `int' to
-   a compiled-in constant, such as set a value from `optarg', set the
-   option's `flag' field to zero and its `val' field to a nonzero
-   value (the equivalent single-letter option character, if there is
-   one).  For long options that have a zero `flag' field, `getopt'
-   returns the contents of the `val' field.  */
-
-struct option
-{
-# if (defined __STDC__ && __STDC__) || defined __cplusplus
-  const char *name;
-# else
-  char *name;
-# endif
-  /* has_arg can't be an enum because some compilers complain about
-     type mismatches in all the code that assumes it is an int.  */
-  int has_arg;
-  int *flag;
-  int val;
-};
-
-/* Names for the values of the `has_arg' field of `struct option'.  */
-
-# define no_argument            0
-# define required_argument      1
-# define optional_argument      2
-#endif  /* need getopt */
-
-
-/* Get definitions and prototypes for functions to process the
-   arguments in ARGV (ARGC of them, minus the program name) for
-   options given in OPTS.
-
-   Return the option character from OPTS just read.  Return -1 when
-   there are no more options.  For unrecognized options, or options
-   missing arguments, `optopt' is set to the option letter, and '?' is
-   returned.
-
-   The OPTS string is a list of characters which are recognized option
-   letters, optionally followed by colons, specifying that that letter
-   takes an argument, to be placed in `optarg'.
-
-   If a letter in OPTS is followed by two colons, its argument is
-   optional.  This behavior is specific to the GNU `getopt'.
-
-   The argument `--' causes premature termination of argument
-   scanning, explicitly telling `getopt' that there are no more
-   options.
-
-   If OPTS begins with `--', then non-option arguments are treated as
-   arguments to the option '\0'.  This behavior is specific to the GNU
-   `getopt'.  */
-
-#if (defined __STDC__ && __STDC__) || defined __cplusplus
-extern int lsx_getopt (int ___argc, char *const *___argv, const char *__shortopts);
-
-# ifndef __need_getopt
-extern int lsx_getopt_long (int ___argc, char *const *___argv,
-                        const char *__shortopts,
-                        const struct option *__longopts, int *__longind);
-extern int getopt_long_only (int ___argc, char *const *___argv,
-                             const char *__shortopts,
-                             const struct option *__longopts, int *__longind);
-
-/* Internal only.  Users should not call this directly.  */
-extern int _getopt_internal (int ___argc, char *const *___argv,
-                             const char *__shortopts,
-                             const struct option *__longopts, int *__longind,
-                             int __long_only);
-# endif
-#else /* not __STDC__ */
-extern int lsx_getopt ();
-# ifndef __need_getopt
-extern int lsx_getopt_long ();
-extern int getopt_long_only ();
-
-extern int _getopt_internal ();
-# endif
-#endif /* __STDC__ */
-
-#ifdef  __cplusplus
-}
-#endif
-
-/* Make sure we later can get all the definitions and declarations.  */
-#undef __need_getopt
-
-#endif /* getopt.h */
-
-#if defined __SUNPRO_CC
-  #pragma enable_warn
-#elif defined _MSC_VER
-  #pragma warning(pop)
-#endif
-
--- a/src/sinc.c
+++ b/src/sinc.c
@@ -17,7 +17,6 @@
 
 #include "sox_i.h"
 #include "dft_filter.h"
-#include "sgetopt.h"
 #include <string.h>
 
 typedef struct {
@@ -33,6 +32,8 @@
   dft_filter_priv_t * b = &p->base;
   char * parse_ptr = argv[0];
   int i = 0;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, "+ra:b:p:MILt:n:", NULL, lsx_getopt_flag_none, 1, &optstate);
 
   b->filter_ptr = &b->filter;
   p->phase = 50;
@@ -39,17 +40,17 @@
   p->beta = -1;
   while (i < 2) {
     int c = 1;
-    while (c && (c = lsx_getopt(argc, argv, "+ra:b:p:MILt:n:")) != -1) switch (c) {
+    while (c && (c = lsx_getopt(&optstate)) != -1) switch (c) {
       char * parse_ptr2;
       case 'r': p->round = sox_true; break;
-      GETOPT_NUMERIC('a', att,  40 , 180)
-      GETOPT_NUMERIC('b', beta,  0 , 256)
-      GETOPT_NUMERIC('p', phase, 0, 100)
+      GETOPT_NUMERIC(optstate, 'a', att,  40 , 180)
+      GETOPT_NUMERIC(optstate, 'b', beta,  0 , 256)
+      GETOPT_NUMERIC(optstate, 'p', phase, 0, 100)
       case 'M': p->phase =  0; break;
       case 'I': p->phase = 25; break;
       case 'L': p->phase = 50; break;
-      GETOPT_NUMERIC('n', num_taps[1], 11, 32767)
-      case 't': p->tbw1 = lsx_parse_frequency(lsx_optarg, &parse_ptr2);
+      GETOPT_NUMERIC(optstate, 'n', num_taps[1], 11, 32767)
+      case 't': p->tbw1 = lsx_parse_frequency(optstate.arg, &parse_ptr2);
         if (p->tbw1 < 1 || *parse_ptr2) return lsx_usage(effp);
         break;
       default: c = 0;
@@ -58,14 +59,14 @@
       return lsx_usage(effp);
     if (!i || !p->Fc1)
       p->tbw0 = p->tbw1, p->num_taps[0] = p->num_taps[1];
-    if (!i++ && lsx_optind < argc) {
-      if (*(parse_ptr = argv[lsx_optind++]) != '-')
+    if (!i++ && optstate.ind < argc) {
+      if (*(parse_ptr = argv[optstate.ind++]) != '-')
         p->Fc0 = lsx_parse_frequency(parse_ptr, &parse_ptr);
       if (*parse_ptr == '-')
         p->Fc1 = lsx_parse_frequency(parse_ptr + 1, &parse_ptr);
     }
   }
-  return lsx_optind != argc || p->Fc0 < 0 || p->Fc1 < 0 || *parse_ptr ?
+  return optstate.ind != argc || p->Fc0 < 0 || p->Fc1 < 0 || *parse_ptr ?
       lsx_usage(effp) : SOX_SUCCESS;
 }
 
--- a/src/sox.c
+++ b/src/sox.c
@@ -24,7 +24,6 @@
 #include "soxconfig.h"
 #include "sox.h"
 #include "util.h"
-#include "sgetopt.h"
 
 #include <ctype.h>
 #include <errno.h>
@@ -733,7 +732,7 @@
   eff_chain_count = 0;
 } /* delete_eff_chains */
 
-static sox_bool is_pseudo_effect(char *s)
+static sox_bool is_pseudo_effect(const char *s)
 {
   if (s)
   if (strcmp("newfile", s) == 0 ||
@@ -743,9 +742,9 @@
   return sox_false;
 } /* is_pseudo_effect */
 
-static void parse_effects(int argc, char **argv)
+static void parse_effects(int * argi, int argc, char ** argv)
 {
-  while (lsx_optind < argc) {
+  while (*argi < argc) {
     unsigned eff_offset;
     int j;
     int newline_mode = 0;
@@ -757,7 +756,7 @@
     }
 
     /* psuedo-effect ":" is used to create a new effects chain */
-    if (strcmp(argv[lsx_optind], ":") == 0)
+    if (strcmp(argv[*argi], ":") == 0)
     {
       /* Only create a new chain if current one has effects.
        * Error checking will be done when loop is restarted.
@@ -767,15 +766,15 @@
         eff_chain_count++;
         add_eff_chain();
       }
-      lsx_optind++;
+      (*argi)++;
       continue;
     }
 
-    if (strcmp(argv[lsx_optind], "newfile") == 0)
+    if (strcmp(argv[*argi], "newfile") == 0)
     {
       /* Start a new effect chain for newfile if user doesn't
        * manually do it.  Restart loop without advancing
-       * optind to do error checking.
+       * argi to do error checking.
        */
       if (nuser_effects[eff_chain_count] != 0)
       {
@@ -785,11 +784,11 @@
       }
       newline_mode = 1;
     }
-    else if (strcmp(argv[lsx_optind], "restart") == 0)
+    else if (strcmp(argv[*argi], "restart") == 0)
     {
       /* Start a new effect chain for restart if user doesn't
        * manually do it.  Restart loop without advancing
-       * optind to do error checking.
+       * argi to do error checking.
        */
       if (nuser_effects[eff_chain_count] != 0)
       {
@@ -801,13 +800,13 @@
     }
 
     /* Name should always be correct! */
-    user_effargs[eff_chain_count][eff_offset].name = strdup(argv[lsx_optind++]);
-    for (j = 0; j < argc - lsx_optind && !sox_find_effect(argv[lsx_optind + j]) &&
-         !is_pseudo_effect(argv[lsx_optind + j]); ++j)
-      user_effargs[eff_chain_count][eff_offset].argv[j] = strdup(argv[lsx_optind + j]);
+    user_effargs[eff_chain_count][eff_offset].name = strdup(argv[(*argi)++]);
+    for (j = 0; j < argc - *argi && !sox_find_effect(argv[*argi + j]) &&
+         !is_pseudo_effect(argv[*argi + j]); ++j)
+      user_effargs[eff_chain_count][eff_offset].argv[j] = strdup(argv[*argi + j]);
     user_effargs[eff_chain_count][eff_offset].argc = j;
 
-    lsx_optind += j; /* Skip past the effect arguments */
+    *argi += j; /* Skip past the effect arguments */
     nuser_effects[eff_chain_count]++;
     if (newline_mode)
     {
@@ -846,7 +845,7 @@
   return argv;
 }                                /* strtoargv */
 
-static void read_user_effects(char *filename)
+static void read_user_effects(char const *filename)
 {
     FILE *file = fopen(filename, "rt");
     char s[FILENAME_MAX];
@@ -878,6 +877,8 @@
       argv = strtoargv(s, &argc);
 
       if (argv) {
+        int argi;
+
         /* Make sure first option is an effect name. */
         if (!sox_find_effect(argv[0]) && !is_pseudo_effect(argv[0]))
         {
@@ -885,12 +886,8 @@
           exit(1);
         }
 
-        /* parse_effects normally parses options from command line.
-         * Reset opt index so it thinks its back at beginning of
-         * main()'s argv[].
-         */
-        lsx_optind = 0;
-        parse_effects(argc, argv);
+        argi = 0;
+        parse_effects(&argi, argc, argv);
 
         /* Advance to next effect but only if current chain has been
          * filled in.  This recovers from side affects of psuedo-effects.
@@ -2024,50 +2021,50 @@
 static char const * const getoptstr =
   "+ab:c:de:fghimnopqr:st:uv:xABC:DGLMNRSTUV::X12348";
 
-static struct option const long_options[] = {
-  {"add-comment"     , required_argument, NULL, 0},
-  {"buffer"          , required_argument, NULL, 0},
-  {"combine"         , required_argument, NULL, 0},
-  {"comment-file"    , required_argument, NULL, 0},
-  {"comment"         , required_argument, NULL, 0},
-  {"endian"          , required_argument, NULL, 0},
-  {"input-buffer"    , required_argument, NULL, 0},
-  {"interactive"     ,       no_argument, NULL, 0},
-  {"help-effect"     , required_argument, NULL, 0},
-  {"help-format"     , required_argument, NULL, 0},
-  {"no-glob"         ,       no_argument, NULL, 0},
-  {"plot"            , required_argument, NULL, 0},
-  {"replay-gain"     , required_argument, NULL, 0},
-  {"version"         ,       no_argument, NULL, 0},
-  {"output"          , required_argument, NULL, 0},
-  {"effects-file"    , required_argument, NULL, 0},
-  {"temp"            , required_argument, NULL, 0},
-  {"single-threaded" ,       no_argument, NULL, 0},
-  {"ignore-length"   ,       no_argument, NULL, 0},
-  {"norm"            ,       no_argument, NULL, 0},
-  {"magic"           ,       no_argument, NULL, 0},
-  {"play-rate-arg"   , required_argument, NULL, 0},
-  {"clobber"         ,       no_argument, NULL, 0},
-  {"no-clobber"      ,       no_argument, NULL, 0},
-  {"multi-threaded"  ,       no_argument, NULL, 0},
+static struct lsx_option_t const long_options[] = {
+  {"add-comment"     , lsx_option_arg_required, NULL, 0},
+  {"buffer"          , lsx_option_arg_required, NULL, 0},
+  {"combine"         , lsx_option_arg_required, NULL, 0},
+  {"comment-file"    , lsx_option_arg_required, NULL, 0},
+  {"comment"         , lsx_option_arg_required, NULL, 0},
+  {"endian"          , lsx_option_arg_required, NULL, 0},
+  {"input-buffer"    , lsx_option_arg_required, NULL, 0},
+  {"interactive"     , lsx_option_arg_none    , NULL, 0},
+  {"help-effect"     , lsx_option_arg_required, NULL, 0},
+  {"help-format"     , lsx_option_arg_required, NULL, 0},
+  {"no-glob"         , lsx_option_arg_none    , NULL, 0},
+  {"plot"            , lsx_option_arg_required, NULL, 0},
+  {"replay-gain"     , lsx_option_arg_required, NULL, 0},
+  {"version"         , lsx_option_arg_none    , NULL, 0},
+  {"output"          , lsx_option_arg_required, NULL, 0},
+  {"effects-file"    , lsx_option_arg_required, NULL, 0},
+  {"temp"            , lsx_option_arg_required, NULL, 0},
+  {"single-threaded" , lsx_option_arg_none    , NULL, 0},
+  {"ignore-length"   , lsx_option_arg_none    , NULL, 0},
+  {"norm"            , lsx_option_arg_none    , NULL, 0},
+  {"magic"           , lsx_option_arg_none    , NULL, 0},
+  {"play-rate-arg"   , lsx_option_arg_required, NULL, 0},
+  {"clobber"         , lsx_option_arg_none    , NULL, 0},
+  {"no-clobber"      , lsx_option_arg_none    , NULL, 0},
+  {"multi-threaded"  , lsx_option_arg_none    , NULL, 0},
 
-  {"bits"            , required_argument, NULL, 'b'},
-  {"channels"        , required_argument, NULL, 'c'},
-  {"compression"     , required_argument, NULL, 'C'},
-  {"default-device"  ,       no_argument, NULL, 'd'},
-  {"no-dither"       ,       no_argument, NULL, 'D'},
-  {"encoding"        , required_argument, NULL, 'e'},
-  {"help"            ,       no_argument, NULL, 'h'},
-  {"null"            ,       no_argument, NULL, 'n'},
-  {"no-show-progress",       no_argument, NULL, 'q'},
-  {"pipe"            ,       no_argument, NULL, 'p'},
-  {"rate"            , required_argument, NULL, 'r'},
-  {"reverse-bits"    ,       no_argument, NULL, 'X'},
-  {"reverse-nibbles" ,       no_argument, NULL, 'N'},
-  {"show-progress"   ,       no_argument, NULL, 'S'},
-  {"type"            , required_argument, NULL, 't'},
-  {"volume"          , required_argument, NULL, 'v'},
-  {"guard"           ,       no_argument, NULL, 'G'},
+  {"bits"            , lsx_option_arg_required, NULL, 'b'},
+  {"channels"        , lsx_option_arg_required, NULL, 'c'},
+  {"compression"     , lsx_option_arg_required, NULL, 'C'},
+  {"default-device"  , lsx_option_arg_none    , NULL, 'd'},
+  {"no-dither"       , lsx_option_arg_none    , NULL, 'D'},
+  {"encoding"        , lsx_option_arg_required, NULL, 'e'},
+  {"help"            , lsx_option_arg_none    , NULL, 'h'},
+  {"null"            , lsx_option_arg_none    , NULL, 'n'},
+  {"no-show-progress", lsx_option_arg_none    , NULL, 'q'},
+  {"pipe"            , lsx_option_arg_none    , NULL, 'p'},
+  {"rate"            , lsx_option_arg_required, NULL, 'r'},
+  {"reverse-bits"    , lsx_option_arg_none    , NULL, 'X'},
+  {"reverse-nibbles" , lsx_option_arg_none    , NULL, 'N'},
+  {"show-progress"   , lsx_option_arg_none    , NULL, 'S'},
+  {"type"            , lsx_option_arg_required, NULL, 't'},
+  {"volume"          , lsx_option_arg_required, NULL, 'v'},
+  {"guard"           , lsx_option_arg_none    , NULL, 'G'},
 
   {NULL, 0, NULL, 0}
 };
@@ -2122,9 +2119,9 @@
   {"a-law", encoding_a_law},
   {0, 0}};
 
-static int enum_option(int option_index, lsx_enum_item const * items)
+static int enum_option(char const * arg, int option_index, lsx_enum_item const * items)
 {
-  lsx_enum_item const * p = lsx_find_enum_text(lsx_optarg, items, 0);
+  lsx_enum_item const * p = lsx_find_enum_text(arg, items, 0);
   if (p == NULL) {
     size_t len = 1;
     char * set = lsx_malloc(len);
@@ -2134,7 +2131,7 @@
       strcat(set, ", "); strcat(set, p->text);
     }
     lsx_fail("--%s: `%s' is not one of: %s.",
-        long_options[option_index].name, lsx_optarg, set + 2);
+        long_options[option_index].name, arg, set + 2);
     free(set);
     exit(1);
   }
@@ -2141,29 +2138,32 @@
   return p->value;
 }
 
-static char parse_gopts_and_fopts(file_t * f, int argc, char **argv)
+static char parse_gopts_and_fopts(file_t * f, int * argi, int argc, char **argv)
 {
+  lsx_getopt_t optstate;
   const sox_version_info_t* info = sox_version_info();
+  lsx_getopt_init(argc, argv, getoptstr, long_options, lsx_getopt_flag_opterr, *argi, &optstate);
   while (sox_true) {
-    int c, option_index;
+    int c;
     int i; /* sscanf silently accepts negative numbers for %u :( */
     char dummy;     /* To check for extraneous chars in optarg. */
 
-    switch (c=lsx_getopt_long(argc, argv, getoptstr, long_options, &option_index)) {
+    switch (c=lsx_getopt(&optstate)) {
     case -1:        /* @ one of: file-name, effect name, end of arg-list. */
+      *argi = optstate.ind;
       return '\0'; /* i.e. not device. */
 
     case 0:         /* Long options with no short equivalent. */
-      switch (option_index) {
+      switch (optstate.lngind) {
       case 0:
-        if (lsx_optarg)
-          sox_append_comment(&f->oob.comments, lsx_optarg);
+        if (optstate.arg)
+          sox_append_comment(&f->oob.comments, optstate.arg);
         break;
 
       case 1:
 #define SOX_BUFMIN 16
-        if (sscanf(lsx_optarg, "%i %c", &i, &dummy) != 1 || i <= SOX_BUFMIN) {
-          lsx_fail("Buffer size `%s' must be > %d", lsx_optarg, SOX_BUFMIN);
+        if (sscanf(optstate.arg, "%i %c", &i, &dummy) != 1 || i <= SOX_BUFMIN) {
+          lsx_fail("Buffer size `%s' must be > %d", optstate.arg, SOX_BUFMIN);
           exit(1);
         }
         sox_globals.bufsiz = i;
@@ -2170,24 +2170,24 @@
         break;
 
       case 2:
-        combine_method = enum_option(option_index, combine_methods);
+        combine_method = enum_option(optstate.arg, optstate.lngind, combine_methods);
         break;
 
       case 3:
         sox_append_comment(&f->oob.comments, "");
-        read_comment_file(&f->oob.comments, lsx_optarg);
+        read_comment_file(&f->oob.comments, optstate.arg);
         break;
 
       case 4:
         sox_append_comment(&f->oob.comments, "");
-        if (*lsx_optarg)
-          sox_append_comment(&f->oob.comments, lsx_optarg);
+        if (*optstate.arg)
+          sox_append_comment(&f->oob.comments, optstate.arg);
         break;
 
       case 5:
         if (f->encoding.reverse_bytes != SOX_OPTION_DEFAULT || f->encoding.opposite_endian)
           usage("only one endian option per file is allowed");
-        switch (enum_option(option_index, endian_options)) {
+        switch (enum_option(optstate.arg, optstate.lngind, endian_options)) {
           case ENDIAN_little: f->encoding.reverse_bytes = MACHINE_IS_BIGENDIAN; break;
           case ENDIAN_big: f->encoding.reverse_bytes = MACHINE_IS_LITTLEENDIAN; break;
           case ENDIAN_swap: f->encoding.opposite_endian = sox_true; break;
@@ -2195,8 +2195,8 @@
         break;
 
       case 6:
-        if (sscanf(lsx_optarg, "%i %c", &i, &dummy) != 1 || i <= SOX_BUFMIN) {
-          lsx_fail("Buffer size `%s' must be > %d", lsx_optarg, SOX_BUFMIN);
+        if (sscanf(optstate.arg, "%i %c", &i, &dummy) != 1 || i <= SOX_BUFMIN) {
+          lsx_fail("Buffer size `%s' must be > %d", optstate.arg, SOX_BUFMIN);
           exit(1);
         }
         sox_globals.input_bufsiz = i;
@@ -2203,17 +2203,17 @@
         break;
 
       case 7: no_clobber = sox_true; break;
-      case 8: usage_effect(lsx_optarg); break;
-      case 9: usage_format(lsx_optarg); break;
+      case 8: usage_effect(optstate.arg); break;
+      case 9: usage_format(optstate.arg); break;
       case 10: f->no_glob = sox_true; break;
       case 11:
-        sox_effects_globals.plot = enum_option(option_index, plot_methods);
+        sox_effects_globals.plot = enum_option(optstate.arg, optstate.lngind, plot_methods);
         break;
-      case 12: replay_gain_mode = enum_option(option_index, rg_modes); break;
+      case 12: replay_gain_mode = enum_option(optstate.arg, optstate.lngind, rg_modes); break;
       case 13: display_SoX_version(stdout); exit(0); break;
       case 14: break;
-      case 15: effects_filename = strdup(lsx_optarg); break;
-      case 16: sox_globals.tmp_path = strdup(lsx_optarg); break;
+      case 15: effects_filename = strdup(optstate.arg); break;
+      case 16: sox_globals.tmp_path = strdup(optstate.arg); break;
       case 17: sox_globals.use_threads = sox_false; break;
       case 18: f->signal.length = SOX_IGNORE_LENGTH; break;
       case 19: do_guarded_norm = is_guarded = sox_true; break;
@@ -2223,7 +2223,7 @@
         else
           lsx_warn("this build of SoX does not include `magic'");
         break;
-      case 21: play_rate_arg = strdup(lsx_optarg); break;
+      case 21: play_rate_arg = strdup(optstate.arg); break;
       case 22: no_clobber = sox_false; break;
       case 23: no_clobber = sox_true; break;
       case 24: sox_globals.use_threads = sox_true; break;
@@ -2240,8 +2240,8 @@
       break;
 
     case 'd': case 'n': case 'p':
+      *argi = optstate.ind;
       return c;
-      break;
 
     case 'h':
       usage(NULL);
@@ -2252,7 +2252,7 @@
       break;
 
     case 't':
-      f->filetype = lsx_optarg;
+      f->filetype = optstate.arg;
       if (f->filetype[0] == '.')
         f->filetype++;
       break;
@@ -2259,9 +2259,9 @@
 
     case 'r': {
       char k = 0;
-      size_t n = sscanf(lsx_optarg, "%lf %c %c", &f->signal.rate, &k, &dummy);
+      size_t n = sscanf(optstate.arg, "%lf %c %c", &f->signal.rate, &k, &dummy);
       if (n < 1 || f->signal.rate <= 0 || (n > 1 && k != 'k') || n > 2) {
-        lsx_fail("Rate value `%s' is not a positive number", lsx_optarg);
+        lsx_fail("Rate value `%s' is not a positive number", optstate.arg);
         exit(1);
       }
       f->signal.rate *= k == 'k'? 1000. : 1.;
@@ -2269,8 +2269,8 @@
     }
 
     case 'v':
-      if (sscanf(lsx_optarg, "%lf %c", &f->volume, &dummy) != 1) {
-        lsx_fail("Volume value `%s' is not a number", lsx_optarg);
+      if (sscanf(optstate.arg, "%lf %c", &f->volume, &dummy) != 1) {
+        lsx_fail("Volume value `%s' is not a number", optstate.arg);
         exit(1);
       }
       uservolume = sox_true;
@@ -2280,8 +2280,8 @@
       break;
 
     case 'c':
-      if (sscanf(lsx_optarg, "%d %c", &i, &dummy) != 1 || i <= 0) {
-        lsx_fail("Channels value `%s' is not a positive integer", lsx_optarg);
+      if (sscanf(optstate.arg, "%d %c", &i, &dummy) != 1 || i <= 0) {
+        lsx_fail("Channels value `%s' is not a positive integer", optstate.arg);
         exit(1);
       }
       f->signal.channels = i;
@@ -2288,21 +2288,21 @@
       break;
 
     case 'C':
-      if (sscanf(lsx_optarg, "%lf %c", &f->encoding.compression, &dummy) != 1) {
-        lsx_fail("Compression value `%s' is not a number", lsx_optarg);
+      if (sscanf(optstate.arg, "%lf %c", &f->encoding.compression, &dummy) != 1) {
+        lsx_fail("Compression value `%s' is not a number", optstate.arg);
         exit(1);
       }
       break;
 
     case 'b':
-      if (sscanf(lsx_optarg, "%d %c", &i, &dummy) != 1 || i <= 0) {
-        lsx_fail("Bits value `%s' is not a positive integer", lsx_optarg);
+      if (sscanf(optstate.arg, "%d %c", &i, &dummy) != 1 || i <= 0) {
+        lsx_fail("Bits value `%s' is not a positive integer", optstate.arg);
         exit(1);
       }
       f->encoding.bits_per_sample = i;
       break;
 
-    case 'e': switch (enum_option(opt_index('e'), encodings)) {
+    case 'e': switch (enum_option(optstate.arg, opt_index('e'), encodings)) {
       case encoding_signed_integer:   f->encoding.encoding = SOX_ENCODING_SIGN2;     break;
       case encoding_unsigned_integer: f->encoding.encoding = SOX_ENCODING_UNSIGNED;  break;
       case encoding_floating_point:   f->encoding.encoding = SOX_ENCODING_FLOAT;     break;
@@ -2362,12 +2362,12 @@
     case 'D': no_dither = sox_true; break;
 
     case 'V':
-      if (lsx_optarg == NULL)
+      if (optstate.arg == NULL)
         ++sox_globals.verbosity;
       else {
-        if (sscanf(lsx_optarg, "%d %c", &i, &dummy) != 1 || i < 0) {
+        if (sscanf(optstate.arg, "%d %c", &i, &dummy) != 1 || i < 0) {
           sox_globals.verbosity = 2;
-          lsx_fail("Verbosity value `%s' is not a non-negative integer", lsx_optarg);
+          lsx_fail("Verbosity value `%s' is not a non-negative integer", optstate.arg);
           exit(1);
         }
         sox_globals.verbosity = (unsigned)i;
@@ -2466,7 +2466,7 @@
   f->replay_gain = HUGE_VAL;
 }
 
-static void parse_options_and_filenames(int argc, char **argv)
+static void parse_options_and_filenames(int * argi, int argc, char **argv)
 {
   char const * env_opts = getenv(SOX_OPTS);
   file_t opts, opts_none;
@@ -2478,21 +2478,21 @@
   if (env_opts && *env_opts) {
     char * * argv2, * str = lsx_malloc(strlen(argv[0]) + strlen(env_opts) + 2);
     int argc2;
+    int argi2 = 1;
     strcpy(str, argv[0]);
     strcat(str, " ");
     strcat(str, env_opts);
     argv2 = strtoargv(str, &argc2);
-    if (parse_gopts_and_fopts(&opts, argc2, argv2)) {
+    if (parse_gopts_and_fopts(&opts, &argi2, argc2, argv2)) {
       lsx_fail("invalid option for "SOX_OPTS);
       exit(1);
     }
-    lsx_optind = 1, opterr = 0;
     free(str);
     free(argv2);
   }
 
-  for (; lsx_optind < argc && !sox_find_effect(argv[lsx_optind]); init_file(&opts)) {
-    char c = parse_gopts_and_fopts(&opts, argc, argv);
+  for (; *argi < argc && !sox_find_effect(argv[*argi]); init_file(&opts)) {
+    char c = parse_gopts_and_fopts(&opts, argi, argc, argv);
     if (c == 'n') { /* is null file? */
       if (opts.filetype != NULL && strcmp(opts.filetype, "null") != 0)
         lsx_warn("ignoring `-t %s'.", opts.filetype);
@@ -2507,11 +2507,11 @@
       opts.filetype = "sox";
       add_file(&opts, "-");
     }
-    else if (lsx_optind >= argc || sox_find_effect(argv[lsx_optind]))
+    else if (*argi >= argc || sox_find_effect(argv[*argi]))
       break;
-    else if (!sox_is_playlist(argv[lsx_optind]))
-      add_glob_file(&opts, argv[lsx_optind++]);
-    else if (sox_parse_playlist((sox_playlist_callback_t)add_file, &opts, argv[lsx_optind++]) != SOX_SUCCESS)
+    else if (!sox_is_playlist(argv[*argi]))
+      add_glob_file(&opts, argv[(*argi)++]);
+    else if (sox_parse_playlist((sox_playlist_callback_t)add_file, &opts, argv[(*argi)++]) != SOX_SUCCESS)
       exit(1);
   }
   if (env_opts && *env_opts) {
@@ -2530,7 +2530,7 @@
 typedef enum {Full, Type, Rate, Channels, Samples, Duration, Duration_secs,
     Bits, Bitrate, Encoding, Annotation} soxi_t;
 
-static int soxi1(soxi_t const * type, char * filename)
+static int soxi1(soxi_t const * type, char const * filename)
 {
   sox_format_t * ft = sox_open_read(filename, NULL, NULL, NULL);
   double secs;
@@ -2594,25 +2594,27 @@
   exit(return_code);
 }
 
-static int soxi(int argc, char * const * argv)
+static int soxi(int * argi, int argc, char * const * argv)
 {
   static char const opts[] = "trcsdDbBea?TV::";
   soxi_t type = Full;
   int opt, num_errors = 0;
   sox_bool do_total = sox_false;
+  lsx_getopt_t optstate;
 
-  if (argc < 2)
+  if (argc - *argi < 1)
     soxi_usage(0);
-  while ((opt = lsx_getopt(argc, argv, opts)) > 0) /* act only on last option */
+  lsx_getopt_init(argc, argv, opts, NULL, lsx_getopt_flag_opterr, *argi, &optstate);
+  while ((opt = lsx_getopt(&optstate)) > 0) /* act only on last option */
     if (opt == 'V') {
       int i; /* sscanf silently accepts negative numbers for %u :( */
-      char dummy;     /* To check for extraneous chars in optarg. */
-      if (lsx_optarg == NULL)
+      char dummy;     /* To check for extraneous chars in optstate.arg. */
+      if (optstate.arg == NULL)
         ++sox_globals.verbosity;
       else {
-        if (sscanf(lsx_optarg, "%d %c", &i, &dummy) != 1 || i < 0) {
+        if (sscanf(optstate.arg, "%d %c", &i, &dummy) != 1 || i < 0) {
           sox_globals.verbosity = 2;
-          lsx_fail("Verbosity value `%s' is not a non-negative integer", lsx_optarg);
+          lsx_fail("Verbosity value `%s' is not a non-negative integer", optstate.arg);
           exit(1);
         }
         sox_globals.verbosity = (unsigned)i;
@@ -2630,10 +2632,10 @@
     do_total = sox_false;
   }
   soxi_total = -!do_total;
-  for (; lsx_optind < argc; ++lsx_optind) {
-    if (sox_is_playlist(argv[lsx_optind]))
-      num_errors += (sox_parse_playlist((sox_playlist_callback_t)soxi1, &type, argv[lsx_optind]) != SOX_SUCCESS);
-    else num_errors += soxi1(&type, argv[lsx_optind]);
+  for (; optstate.ind < argc; ++optstate.ind) {
+    if (sox_is_playlist(argv[optstate.ind]))
+      num_errors += (sox_parse_playlist((sox_playlist_callback_t)soxi1, &type, argv[optstate.ind]) != SOX_SUCCESS);
+    else num_errors += soxi1(&type, argv[optstate.ind]);
   }
   if (type == Full) {
     if (soxi_file_count > 1 && soxi_total > 0)
@@ -2698,6 +2700,7 @@
 int main(int argc, char **argv)
 {
   size_t i;
+  int argi = 1;
 
   myname = argv[0];
   sox_globals.output_message_handler = output_message;
@@ -2711,7 +2714,7 @@
 
   if (!sox_mode && argc > 1 &&
       (!strcmp(argv[1], "--i") || !strcmp(argv[1], "--info")))
-    --argc, ++argv, sox_mode = sox_soxi;
+    ++argi, sox_mode = sox_soxi;
 
   if (sox_init() != SOX_SUCCESS)
     exit(1);
@@ -2722,9 +2725,9 @@
   atexit(cleanup);
 
   if (sox_mode == sox_soxi)
-    exit(soxi(argc, argv));
+    exit(soxi(&argi, argc, argv));
 
-  parse_options_and_filenames(argc, argv);
+  parse_options_and_filenames(&argi, argc, argv);
 
 #if defined(__CYGWIN__) || defined(__MINGW32__) 
   /* Workarounds for a couple of cygwin/mingw problems: */
@@ -2832,7 +2835,7 @@
   init_eff_chains();
 
   /* Loop through the rest of the arguments looking for effects */
-  parse_effects(argc, argv);
+  parse_effects(&argi, argc, argv);
   if (eff_chain_count == 0 || nuser_effects[eff_chain_count] > 0)
   {
     eff_chain_count++;
--- a/src/sox.h
+++ b/src/sox.h
@@ -1297,16 +1297,17 @@
 SOX_API lsx_find_enum_value(
     unsigned value,
     LSX_PARAM_IN lsx_enum_item const * lsx_enum_items);
-int
-SOX_API LSX_RETURN_PURE lsx_enum_option(
+LSX_RETURN_PURE int
+SOX_API lsx_enum_option(
     int c,
+    LSX_PARAM_IN_Z char const * arg,
     LSX_PARAM_IN lsx_enum_item const * items);
-sox_bool
-SOX_API LSX_RETURN_PURE lsx_strends(
+LSX_RETURN_PURE sox_bool
+SOX_API lsx_strends(
     LSX_PARAM_IN_Z char const * str,
     LSX_PARAM_IN_Z char const * end);
-LSX_RETURN_VALID_Z char const *
-SOX_API LSX_RETURN_PURE lsx_find_file_extension(
+LSX_RETURN_VALID_Z LSX_RETURN_PURE char const *
+SOX_API lsx_find_file_extension(
     LSX_PARAM_IN_Z char const * pathname);
 LSX_RETURN_VALID_Z char const *
 SOX_API lsx_sigfigs3(
@@ -1318,15 +1319,69 @@
 SOX_API lsx_realloc(
     LSX_PARAM_IN_OPT void *ptr,
     size_t newsize);
-int
-SOX_API LSX_RETURN_PURE lsx_strcasecmp(
+LSX_RETURN_PURE int
+SOX_API lsx_strcasecmp(
     LSX_PARAM_IN_Z const char * s1,
     LSX_PARAM_IN_Z const char * s2);
-int
-SOX_API LSX_RETURN_PURE lsx_strncasecmp(
+LSX_RETURN_PURE int
+SOX_API lsx_strncasecmp(
     LSX_PARAM_IN_Z char const * s1,
     LSX_PARAM_IN_Z char const * s2,
     size_t n);
+
+typedef enum lsx_option_arg_t {
+    lsx_option_arg_none,
+    lsx_option_arg_required,
+    lsx_option_arg_optional
+} lsx_option_arg_t;
+
+typedef struct lsx_option_t {
+    char const *     name;
+    lsx_option_arg_t has_arg;
+    int *            flag;
+    int              val;
+} lsx_option_t;
+
+typedef enum lsx_getopt_flags_t {
+    lsx_getopt_flag_none = 0,      /* no flags (no output, not long-only) */
+    lsx_getopt_flag_opterr = 1,    /* if set, invalid options trigger lsx_warn output */
+    lsx_getopt_flag_longonly = 2   /* if set, recognize accept -option as a long option */
+} lsx_getopt_flags_t;
+
+typedef struct lsx_getopt_t {
+    int                  argc;     /* IN    argc:      Number of arguments in argv */
+    char * const *       argv;     /* IN    argv:      Array of arguments */
+    char const *         shortopts;/* IN    shortopts: Short option characters */
+    lsx_option_t const * longopts; /* IN    longopts:  Array of long option descriptors */
+    lsx_getopt_flags_t   flags;    /* IN    flags:     Flags for longonly and opterr */
+    char const *         curpos;   /* INOUT curpos:    Maintains state between calls to lsx_getopt */
+    int                  ind;      /* INOUT optind:    Maintains the index of next element to be processed */
+    int                  opt;      /* OUT   optopt:    Receives the option character that caused error */
+    char const *         arg;      /* OUT   optarg:    Receives the value of the option's argument */
+    int                  lngind;   /* OUT   lngind:    Receives the index of the matched long option or -1 if not a long option */
+} lsx_getopt_t;
+
+/* Initializes an lsx_getopt_t structure for use with lsx_getopt. */
+void
+SOX_API lsx_getopt_init(
+    LSX_PARAM_IN             int argc,                      /* Number of arguments in argv */
+    LSX_PARAM_IN_COUNT(argc) char * const * argv,           /* Array of arguments */
+    LSX_PARAM_IN_Z           char const * shortopts,        /* Short options, i.e. ":abc:def::ghi" (+/- not supported) */
+    LSX_PARAM_IN_OPT         lsx_option_t const * longopts, /* Array of long option descriptors */
+    LSX_PARAM_IN             lsx_getopt_flags_t flags,      /* Flags for longonly and opterr */
+    LSX_PARAM_IN             int first,                     /* First argv to check (usually 1) */
+    LSX_PARAM_OUT            lsx_getopt_t * state);         /* State object to be initialized */
+
+/* Gets the next option. Options are parameters that start with "-" or "--".
+ * If no more options, returns -1. If unrecognized short option, returns '?'.
+ * If a recognized short option is missing a required argument,
+ * return (shortopts[0]==':' ? ':' : '?'). If successfully recognized short
+ * option, return the recognized character. If successfully recognized long
+ * option, returns (option.flag ? 0 : option.val).
+ * Note: lsx_getopt does not permute the non-option arguments. */
+int /* Returns option character (short), val or 0 (long), or -1 (no more) */
+SOX_API lsx_getopt(
+    LSX_PARAM_INOUT lsx_getopt_t * state);
 
 /* WARNING END */
 
--- a/src/sox_i.h
+++ b/src/sox_i.h
@@ -287,10 +287,10 @@
   } \
 }
 
-#define GETOPT_NUMERIC(ch, name, min, max) case ch:{ \
+#define GETOPT_NUMERIC(state, ch, name, min, max) case ch:{ \
   char * end_ptr; \
-  double d = strtod(lsx_optarg, &end_ptr); \
-  if (end_ptr == lsx_optarg || d < min || d > max || *end_ptr != '\0') {\
+  double d = strtod(state.arg, &end_ptr); \
+  if (end_ptr == state.arg || d < min || d > max || *end_ptr != '\0') {\
     lsx_fail("parameter `%s' must be between %g and %g", #name, (double)min, (double)max); \
     return lsx_usage(effp); \
   } \
--- a/src/spectrogram.c
+++ b/src/spectrogram.c
@@ -21,7 +21,6 @@
 
 #include "sox_i.h"
 #include "fft4g.h"
-#include "sgetopt.h"
 #include <assert.h>
 #include <math.h>
 #ifdef HAVE_LIBPNG_PNG_H
@@ -96,21 +95,23 @@
   size_t duration;
   char const * next;
   int c;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, "+S:d:x:X:y:Y:z:Z:q:p:W:w:st:c:AarmlhTo:", NULL, lsx_getopt_flag_none, 1, &optstate);
 
   p->dB_range = 120, p->spectrum_points = 249, p->perm = 1; /* Non-0 defaults */
   p->out_name = "spectrogram.png", p->comment = "Created by SoX";
 
-  while ((c = lsx_getopt(argc, argv, "+S:d:x:X:y:Y:z:Z:q:p:W:w:st:c:AarmlhTo:")) != -1) switch (c) {
-    GETOPT_NUMERIC('x', x_size0       , 100, 5000)
-    GETOPT_NUMERIC('X', pixels_per_sec,  1 , 5000)
-    GETOPT_NUMERIC('y', y_size        , 64 , 1200)
-    GETOPT_NUMERIC('Y', Y_size        , 130, MAX_FFT_SIZE / 2 + 2)
-    GETOPT_NUMERIC('z', dB_range      , 20 , 180)
-    GETOPT_NUMERIC('Z', gain          ,-100, 100)
-    GETOPT_NUMERIC('q', spectrum_points, 0 , p->spectrum_points)
-    GETOPT_NUMERIC('p', perm          ,  1 , 6)
-    GETOPT_NUMERIC('W', window_adjust , -10, 10)
-    case 'w': p->win_type = lsx_enum_option(c, window_options);   break;
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
+    GETOPT_NUMERIC(optstate, 'x', x_size0       , 100, 5000)
+    GETOPT_NUMERIC(optstate, 'X', pixels_per_sec,  1 , 5000)
+    GETOPT_NUMERIC(optstate, 'y', y_size        , 64 , 1200)
+    GETOPT_NUMERIC(optstate, 'Y', Y_size        , 130, MAX_FFT_SIZE / 2 + 2)
+    GETOPT_NUMERIC(optstate, 'z', dB_range      , 20 , 180)
+    GETOPT_NUMERIC(optstate, 'Z', gain          ,-100, 100)
+    GETOPT_NUMERIC(optstate, 'q', spectrum_points, 0 , p->spectrum_points)
+    GETOPT_NUMERIC(optstate, 'p', perm          ,  1 , 6)
+    GETOPT_NUMERIC(optstate, 'W', window_adjust , -10, 10)
+    case 'w': p->win_type = lsx_enum_option(c, optstate.arg, window_options);   break;
     case 's': p->slack_overlap    = sox_true;   break;
     case 'A': p->alt_palette      = sox_true;   break;
     case 'a': p->no_axes          = sox_true;   break;
@@ -119,16 +120,16 @@
     case 'l': p->light_background = sox_true;   break;
     case 'h': p->high_colour      = sox_true;   break;
     case 'T': p->truncate         = sox_true;   break;
-    case 't': p->title            = lsx_optarg; break;
-    case 'c': p->comment          = lsx_optarg; break;
-    case 'o': p->out_name         = lsx_optarg; break;
-    case 'S': next = lsx_parsesamples(1e5, lsx_optarg, &duration, 't');
+    case 't': p->title            = optstate.arg; break;
+    case 'c': p->comment          = optstate.arg; break;
+    case 'o': p->out_name         = optstate.arg; break;
+    case 'S': next = lsx_parsesamples(1e5, optstate.arg, &duration, 't');
       if (next && !*next) {p->start_time = duration * 1e-5; break;}
       return lsx_usage(effp);
-    case 'd': next = lsx_parsesamples(1e5, lsx_optarg, &duration, 't');
+    case 'd': next = lsx_parsesamples(1e5, optstate.arg, &duration, 't');
       if (next && !*next) {p->duration = duration * 1e-5; break;}
       return lsx_usage(effp);
-    default: lsx_fail("invalid option `-%c'", optopt); return lsx_usage(effp);
+    default: lsx_fail("invalid option `-%c'", optstate.opt); return lsx_usage(effp);
   }
   if (!!p->x_size0 + !!p->pixels_per_sec + !!p->duration > 2) {
     lsx_fail("only two of -x, -X, -d may be given");
@@ -144,7 +145,7 @@
   if (p->alt_palette)
     p->spectrum_points = min(p->spectrum_points, (int)alt_palette_len);
   p->shared_ptr = &p->shared;
-  return lsx_optind !=argc || p->win_type == INT_MAX? lsx_usage(effp) : SOX_SUCCESS;
+  return optstate.ind !=argc || p->win_type == INT_MAX? lsx_usage(effp) : SOX_SUCCESS;
 }
 
 static double make_window(priv_t * p, int end)
--- a/src/stats.c
+++ b/src/stats.c
@@ -16,7 +16,6 @@
  */
 
 #include "sox_i.h"
-#include "sgetopt.h"
 #include <ctype.h>
 #include <string.h>
 
@@ -34,19 +33,21 @@
 {
   priv_t * p = (priv_t *)effp->priv;
   int c;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, "+x:b:w:s:", NULL, lsx_getopt_flag_none, 1, &optstate);
 
   p->time_constant = .05;
   p->scale = 1;
-  while ((c = lsx_getopt(argc, argv, "+x:b:w:s:")) != -1) switch (c) {
-    GETOPT_NUMERIC('x', hex_bits      ,  2 , 32)
-    GETOPT_NUMERIC('b', scale_bits    ,  2 , 32)
-    GETOPT_NUMERIC('w', time_constant ,  .01 , 10)
-    GETOPT_NUMERIC('s', scale         ,  -99, 99)
-    default: lsx_fail("invalid option `-%c'", optopt); return lsx_usage(effp);
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
+    GETOPT_NUMERIC(optstate, 'x', hex_bits      ,  2 , 32)
+    GETOPT_NUMERIC(optstate, 'b', scale_bits    ,  2 , 32)
+    GETOPT_NUMERIC(optstate, 'w', time_constant ,  .01 , 10)
+    GETOPT_NUMERIC(optstate, 's', scale         ,  -99, 99)
+    default: lsx_fail("invalid option `-%c'", optstate.opt); return lsx_usage(effp);
   }
   if (p->hex_bits)
     p->scale_bits = p->hex_bits;
-  return lsx_optind != argc? lsx_usage(effp) : SOX_SUCCESS;
+  return optstate.ind != argc? lsx_usage(effp) : SOX_SUCCESS;
 }
 
 static int start(sox_effect_t * effp)
--- a/src/tempo.c
+++ b/src/tempo.c
@@ -19,7 +19,6 @@
 
 #include "sox_i.h"
 #include "fifo.h"
-#include "sgetopt.h"
 #include <math.h>
 
 typedef struct {
@@ -216,16 +215,18 @@
   static const double overlaps_div[] = {6.833, 7,  2.5 , 2};
   static const double searches_div[] = {5.587, 6,  2.14, 2};
   int c;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, "+qmls", NULL, lsx_getopt_flag_none, 1, &optstate);
 
   p->segment_ms = p->search_ms = p->overlap_ms = HUGE_VAL;
-  while ((c = lsx_getopt(argc, argv, "+qmls")) != -1) switch (c) {
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
     case 'q': p->quick_search  = sox_true;   break;
     case 'm': profile = Music; break;
     case 's': profile = Speech; break;
     case 'l': profile = Linear; p->search_ms = 0; break;
-    default: lsx_fail("unknown option `-%c'", optopt); return lsx_usage(effp);
+    default: lsx_fail("unknown option `-%c'", optstate.opt); return lsx_usage(effp);
   }
-  argc -= lsx_optind, argv += lsx_optind;
+  argc -= optstate.ind, argv += optstate.ind;
   do {                    /* break-able block */
     NUMERIC_PARAMETER(factor      ,0.1 , 100 )
     NUMERIC_PARAMETER(segment_ms  , 10 , 120)
--- a/src/util.c
+++ b/src/util.c
@@ -17,7 +17,6 @@
  */
 
 #include "sox_i.h"
-#include "sgetopt.h"
 #include <ctype.h>
 #include <stdio.h>
 
@@ -96,9 +95,9 @@
   return NULL;
 }
 
-int lsx_enum_option(int c, lsx_enum_item const * items)
+int lsx_enum_option(int c, char const * arg, lsx_enum_item const * items)
 {
-  lsx_enum_item const * p = lsx_find_enum_text(lsx_optarg, items, sox_false);
+  lsx_enum_item const * p = lsx_find_enum_text(arg, items, sox_false);
   if (p == NULL) {
     size_t len = 1;
     char * set = lsx_malloc(len);
@@ -107,7 +106,7 @@
       set = lsx_realloc(set, len += 2 + strlen(p->text));
       strcat(set, ", "); strcat(set, p->text);
     }
-    lsx_fail("-%c: `%s' is not one of: %s.", c, lsx_optarg, set + 2);
+    lsx_fail("-%c: `%s' is not one of: %s.", c, arg, set + 2);
     free(set);
     return INT_MAX;
   }
--- a/src/vad.c
+++ b/src/vad.c
@@ -16,7 +16,6 @@
  */
 
 #include "sox_i.h"
-#include "sgetopt.h"
 #include <string.h>
 
 typedef struct {
@@ -41,8 +40,8 @@
   chan_t    * channels;
 } priv_t;
 
-#define GETOPT_FREQ(c, name, min) \
-    case c: p->name = lsx_parse_frequency(lsx_optarg, &parseIndex); \
+#define GETOPT_FREQ(optstate, c, name, min) \
+    case c: p->name = lsx_parse_frequency(optstate.arg, &parseIndex); \
       if (p->name < min || *parseIndex) return lsx_usage(effp); \
       break;
 
@@ -51,6 +50,8 @@
   priv_t * p = (priv_t *)effp->priv;
   #define opt_str "+b:N:n:r:f:m:M:h:l:H:L:T:t:s:g:p:"
   int c;
+  lsx_getopt_t optstate;
+  lsx_getopt_init(argc, argv, opt_str, NULL, lsx_getopt_flag_none, 1, &optstate);
 
   p->bootTime        = .35;
   p->noiseTcUp       = .1;
@@ -72,27 +73,27 @@
   p->searchTime      = 1;
   p->gapTime         = .25;
 
-  while ((c = lsx_getopt(argc, argv, opt_str)) != -1) switch (c) {
+  while ((c = lsx_getopt(&optstate)) != -1) switch (c) {
     char * parseIndex;
-    GETOPT_NUMERIC('b', bootTime      ,  .1 , 10)
-    GETOPT_NUMERIC('N', noiseTcUp     ,  .1 , 10)
-    GETOPT_NUMERIC('n', noiseTcDown   ,.001 , .1)
-    GETOPT_NUMERIC('r', noiseReductionAmount,0 , 2)
-    GETOPT_NUMERIC('f', measureFreq   ,   5 , 50)
-    GETOPT_NUMERIC('m', measureDuration, .01 , 1)
-    GETOPT_NUMERIC('M', measureTc     ,  .1 , 1)
-    GETOPT_FREQ(   'h', hpFilterFreq  ,  10)
-    GETOPT_FREQ(   'l', lpFilterFreq  ,  1000)
-    GETOPT_FREQ(   'H', hpLifterFreq  ,  10)
-    GETOPT_FREQ(   'L', lpLifterFreq  ,  1000)
-    GETOPT_NUMERIC('T', triggerTc     , .01 , 1)
-    GETOPT_NUMERIC('t', triggerLevel  ,   0 , 20)
-    GETOPT_NUMERIC('s', searchTime    ,  .1 , 4)
-    GETOPT_NUMERIC('g', gapTime       ,  .1 , 1)
-    GETOPT_NUMERIC('p', preTriggerTime,   0 , 4)
-    default: lsx_fail("invalid option `-%c'", optopt); return lsx_usage(effp);
+    GETOPT_NUMERIC(optstate, 'b', bootTime      ,  .1 , 10)
+    GETOPT_NUMERIC(optstate, 'N', noiseTcUp     ,  .1 , 10)
+    GETOPT_NUMERIC(optstate, 'n', noiseTcDown   ,.001 , .1)
+    GETOPT_NUMERIC(optstate, 'r', noiseReductionAmount,0 , 2)
+    GETOPT_NUMERIC(optstate, 'f', measureFreq   ,   5 , 50)
+    GETOPT_NUMERIC(optstate, 'm', measureDuration, .01 , 1)
+    GETOPT_NUMERIC(optstate, 'M', measureTc     ,  .1 , 1)
+    GETOPT_FREQ(   optstate, 'h', hpFilterFreq  ,  10)
+    GETOPT_FREQ(   optstate, 'l', lpFilterFreq  ,  1000)
+    GETOPT_FREQ(   optstate, 'H', hpLifterFreq  ,  10)
+    GETOPT_FREQ(   optstate, 'L', lpLifterFreq  ,  1000)
+    GETOPT_NUMERIC(optstate, 'T', triggerTc     , .01 , 1)
+    GETOPT_NUMERIC(optstate, 't', triggerLevel  ,   0 , 20)
+    GETOPT_NUMERIC(optstate, 's', searchTime    ,  .1 , 4)
+    GETOPT_NUMERIC(optstate, 'g', gapTime       ,  .1 , 1)
+    GETOPT_NUMERIC(optstate, 'p', preTriggerTime,   0 , 4)
+    default: lsx_fail("invalid option `-%c'", optstate.opt); return lsx_usage(effp);
   }
-  return lsx_optind !=argc? lsx_usage(effp) : SOX_SUCCESS;
+  return optstate.ind !=argc? lsx_usage(effp) : SOX_SUCCESS;
 }
 
 static int start(sox_effect_t * effp)