ref: 397265f5791291defa76487c2388e1898e2e433c
dir: /src/utils/cst_args.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2001 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: November 2001 */
/*************************************************************************/
/* */
/* Argument/usage command parser (like that in EST) */
/* */
/*************************************************************************/
#include "cst_tokenstream.h"
#include "cst_features.h"
static void parse_description(const char *description, cst_features *f);
static void parse_usage(const char *progname,
const char *s1, const char *s2,
const char *description);
cst_val *cst_args(char **argv, int argc,
const char *description,
cst_features *args)
{
/* parses the given arguments wrt the description */
cst_features *op_types = new_features();
cst_val *files = NULL;
int i;
const char *type;
parse_description(description,op_types);
for (i=1; i<argc; i++)
{
if (argv[i][0] == '-')
{
if ((!feat_present(op_types,argv[i])) ||
(cst_streq("-h",argv[i])) ||
(cst_streq("-?",argv[i])) ||
(cst_streq("--help",argv[i])) ||
(cst_streq("-help",argv[i])))
parse_usage(argv[0],"","",description);
else
{
type = feat_string(op_types,argv[i]);
if (cst_streq("<binary>",type))
feat_set_string(args,argv[i],"true");
else
{
if (i+1 == argc)
parse_usage(argv[0],
"missing argument for ",argv[i],
description);
if (cst_streq("<int>",type))
feat_set_int(args,argv[i],atoi(argv[i+1]));
else if (cst_streq("<float>",type))
feat_set_float(args,argv[i],atof(argv[i+1]));
else if (cst_streq("<string>",type))
feat_set_string(args,argv[i],argv[i+1]);
else
parse_usage(argv[0],
"unknown arg type ",type,
description);
i++;
}
}
}
else
files = cons_val(string_val(argv[i]),files);
}
delete_features(op_types);
return val_reverse(files);
}
static void parse_usage(const char *progname,
const char *s1, const char *s2,
const char *description)
{
cst_errmsg("%s: %s %s\n", progname,s1,s2);
cst_errmsg("%s\n",description);
exit(0);
}
static void parse_description(const char *description, cst_features *f)
{
/* parse the description into something more usable */
cst_tokenstream *ts;
const char *arg;
char *op;
const char *xop;
ts = ts_open_string(description,
" \t\r\n", /* whitespace */
"{}[]|", /* singlecharsymbols */
"", /* prepunctuation */
""); /* postpunctuation */
while (!ts_eof(ts))
{
op = cst_strdup(ts_get(ts));
if ((op[0] == '-') && (cst_strchr(ts->whitespace,'\n') != 0))
{ /* got an option */
xop = feat_own_string(f,op);
arg = ts_get(ts);
if (arg[0] == '<')
feat_set_string(f,xop,arg);
else
feat_set_string(f,xop,"<binary>");
}
cst_free(op);
}
ts_close(ts);
}