ref: 671f0330ac07dac46c5800005c2ef9590dfdf43e
dir: /src/util.c/
/* General purpose, i.e. non SoX specific, utility functions.
* Copyright (c) 2007-8 robs@users.sourceforge.net
*
* 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
*/
#include "sox_i.h"
#include <ctype.h>
#include <stdio.h>
int lsx_strcasecmp(const char * s1, const char * s2)
{
#if defined(HAVE_STRCASECMP)
return strcasecmp(s1, s2);
#elif defined(_MSC_VER)
return _stricmp(s1, s2);
#else
while (*s1 && (toupper(*s1) == toupper(*s2)))
s1++, s2++;
return toupper(*s1) - toupper(*s2);
#endif
}
int lsx_strncasecmp(char const * s1, char const * s2, size_t n)
{
#if defined(HAVE_STRCASECMP)
return strncasecmp(s1, s2, n);
#elif defined(_MSC_VER)
return _strnicmp(s1, s2, n);
#else
while (--n && *s1 && (toupper(*s1) == toupper(*s2)))
s1++, s2++;
return toupper(*s1) - toupper(*s2);
#endif
}
sox_bool lsx_strends(char const * str, char const * end)
{
size_t str_len = strlen(str), end_len = strlen(end);
return str_len >= end_len && !strcmp(str + str_len - end_len, end);
}
char const * lsx_find_file_extension(char const * pathname)
{
/* First, chop off any path portions of filename. This
* prevents the next search from considering that part. */
char const * result = LAST_SLASH(pathname);
if (!result)
result = pathname;
/* Now look for an filename extension */
result = strrchr(result, '.');
if (result)
++result;
return result;
}
lsx_enum_item const * lsx_find_enum_text(char const * text, lsx_enum_item const * enum_items, int flags)
{
lsx_enum_item const * result = NULL; /* Assume not found */
sox_bool sensitive = !!(flags & lsx_find_enum_item_case_sensitive);
while (enum_items->text) {
if ((!sensitive && !strcasecmp(text, enum_items->text)) ||
( sensitive && ! strcmp(text, enum_items->text)))
return enum_items; /* Found exact match */
if ((!sensitive && !strncasecmp(text, enum_items->text, strlen(text))) ||
( sensitive && ! strncmp(text, enum_items->text, strlen(text)))) {
if (result != NULL && result->value != enum_items->value)
return NULL; /* Found ambiguity */
result = enum_items; /* Found sub-string match */
}
++enum_items;
}
return result;
}
lsx_enum_item const * lsx_find_enum_value(unsigned value, lsx_enum_item const * enum_items)
{
for (;enum_items->text; ++enum_items)
if (value == enum_items->value)
return enum_items;
return NULL;
}
int lsx_enum_option(int c, char const * arg, lsx_enum_item const * items)
{
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);
*set = 0;
for (p = items; p->text; ++p) {
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, arg, set + 2);
free(set);
return INT_MAX;
}
return p->value;
}
char const * lsx_sigfigs3(double number)
{
static char const symbols[] = "\0kMGTPEZY";
static char string[16][10]; /* FIXME: not thread-safe */
static unsigned n; /* ditto */
unsigned a, b, c;
sprintf(string[n = (n+1) & 15], "%#.3g", number);
switch (sscanf(string[n], "%u.%ue%u", &a, &b, &c)) {
case 2: if (b) return string[n]; /* Can fall through */
case 1: c = 2; break;
case 3: a = 100*a + b; break;
}
if (c < array_length(symbols) * 3 - 3) switch (c%3) {
case 0: sprintf(string[n], "%u.%02u%c", a/100,a%100, symbols[c/3]); break;
case 1: sprintf(string[n], "%u.%u%c" , a/10 ,a%10 , symbols[c/3]); break;
case 2: sprintf(string[n], "%u%c" , a , symbols[c/3]); break;
}
return string[n];
}
char const * lsx_sigfigs3p(double percentage)
{
static char string[16][10];
static unsigned n;
sprintf(string[n = (n+1) & 15], "%.1f%%", percentage);
if (strlen(string[n]) < 5)
sprintf(string[n], "%.2f%%", percentage);
else if (strlen(string[n]) > 5)
sprintf(string[n], "%.0f%%", percentage);
return string[n];
}
int lsx_open_dllibrary(
int show_error_on_failure,
const char* library_description,
const char* const library_names[] UNUSED,
const lsx_dlfunction_info func_infos[],
lsx_dlptr selected_funcs[],
lsx_dlhandle* pdl)
{
int failed = 0;
lsx_dlhandle dl = NULL;
/* Track enough information to give a good error message about one failure.
* Let failed symbol load override failed library open, and let failed
* library open override missing static symbols.
*/
const char* failed_libname = NULL;
const char* failed_funcname = NULL;
#ifdef HAVE_LIBLTDL
if (library_names && library_names[0])
{
const char* const* libname;
if (lt_dlinit())
{
lsx_fail(
"Unable to load %s - failed to initialize ltdl.",
library_description);
return 1;
}
for (libname = library_names; *libname; libname++)
{
lsx_debug("Attempting to open %s (%s).", library_description, *libname);
dl = lt_dlopenext(*libname);
if (dl)
{
size_t i;
lsx_debug("Opened %s (%s).", library_description, *libname);
for (i = 0; func_infos[i].name; i++)
{
union {lsx_dlptr fn; lt_ptr ptr;} func;
func.ptr = lt_dlsym(dl, func_infos[i].name);
selected_funcs[i] = func.fn ? func.fn : func_infos[i].stub_func;
if (!selected_funcs[i])
{
lt_dlclose(dl);
dl = NULL;
failed_libname = *libname;
failed_funcname = func_infos[i].name;
lsx_debug("Cannot use %s (%s) - missing function \"%s\".", library_description, failed_libname, failed_funcname);
break;
}
}
if (dl)
break;
}
else if (!failed_libname)
{
failed_libname = *libname;
}
}
if (!dl)
lt_dlexit();
}
#endif /* HAVE_LIBLTDL */
if (!dl)
{
size_t i;
for (i = 0; func_infos[i].name; i++)
{
selected_funcs[i] =
func_infos[i].static_func
? func_infos[i].static_func
: func_infos[i].stub_func;
if (!selected_funcs[i])
{
if (!failed_libname)
{
failed_libname = "static";
failed_funcname = func_infos[i].name;
}
failed = 1;
break;
}
}
}
if (failed)
{
size_t i;
for (i = 0; func_infos[i].name; i++)
selected_funcs[i] = NULL;
#ifdef HAVE_LIBLTDL
#define LTDL_MISSING ""
#else
#define LTDL_MISSING " (Dynamic library support not configured.)"
#endif /* HAVE_LIBLTDL */
if (failed_funcname)
{
if (show_error_on_failure)
lsx_fail(
"Unable to load %s (%s) function \"%s\"." LTDL_MISSING,
library_description,
failed_libname,
failed_funcname);
else
lsx_report(
"Unable to load %s (%s) function \"%s\"." LTDL_MISSING,
library_description,
failed_libname,
failed_funcname);
}
else if (failed_libname)
{
if (show_error_on_failure)
lsx_fail(
"Unable to load %s (%s)." LTDL_MISSING,
library_description,
failed_libname);
else
lsx_report(
"Unable to load %s (%s)." LTDL_MISSING,
library_description,
failed_libname);
}
else
{
if (show_error_on_failure)
lsx_fail(
"Unable to load %s - no dynamic library names selected." LTDL_MISSING,
library_description);
else
lsx_report(
"Unable to load %s - no dynamic library names selected." LTDL_MISSING,
library_description);
}
}
*pdl = dl;
return failed;
}
void lsx_close_dllibrary(
lsx_dlhandle dl UNUSED)
{
#ifdef HAVE_LIBLTDL
if (dl)
{
lt_dlclose(dl);
lt_dlexit();
}
#endif /* HAVE_LIBLTDL */
}