strfuncs.c
/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
* Copyright (c) 1999-2006 Carnegie Mellon University. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
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* 1. Redistributions of source code must retain the above copyright
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* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* This work was supported in part by funding from the Defense Advanced
* Research Projects Agency and the National Science Foundation of the
* United States of America, and the CMU Sphinx Speech Consortium.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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*/
/*
* strfuncs.c -- String functions
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <stdarg.h>
#include "sphinxbase/ckd_alloc.h"
#include "sphinxbase/strfuncs.h"
/* Defined in dtoa.c */
double sb_strtod(const char *s00, char **se);
double
atof_c(char const *str)
{
return sb_strtod(str, NULL);
}
char *
string_join(const char *base, ...)
{
va_list args;
size_t len;
const char *c;
char *out;
va_start(args, base);
len = strlen(base);
while ((c = va_arg(args, const char *)) != NULL) {
len += strlen(c);
}
len++;
va_end(args);
out = ckd_calloc(len, 1);
va_start(args, base);
strcpy(out, base);
while ((c = va_arg(args, const char *)) != NULL) {
strcat(out, c);
}
va_end(args);
return out;
}
char *
string_trim(char *string, enum string_edge_e which)
{
size_t len;
len = strlen(string);
if (which == STRING_START || which == STRING_BOTH) {
size_t sub = strspn(string, " \t\n\r\f");
if (sub > 0) {
memmove(string, string + sub, len + 1 - sub);
len -= sub;
}
}
if (which == STRING_END || which == STRING_BOTH) {
long sub = len;
while (--sub >= 0)
if (strchr(" \t\n\r\f", string[sub]) == NULL)
break;
if (sub == -1)
string[0] = '\0';
else
string[sub+1] = '\0';
}
return string;
}
int32
str2words(char *line, char **ptr, int32 max_ptr)
{
int32 i, n;
n = 0; /* #words found so far */
i = 0; /* For scanning through the input string */
while (1) {
/* Skip whitespace before next word */
while (line[i] && isspace((unsigned char)line[i]))
++i;
if (!line[i])
break;
if (ptr != NULL && n >= max_ptr) {
/*
* Pointer array size insufficient. Restore NULL chars inserted so far
* to space chars. Not a perfect restoration, but better than nothing.
*/
for (; i >= 0; --i)
if (line[i] == '\0')
line[i] = ' ';
return -1;
}
/* Scan to end of word */
if (ptr != NULL)
ptr[n] = line + i;
++n;
while (line[i] && !isspace((unsigned char)line[i]))
++i;
if (!line[i])
break;
if (ptr != NULL)
line[i] = '\0';
++i;
}
return n;
}
int32
nextword(char *line, const char *delim, char **word, char *delimfound)
{
const char *d;
char *w;
/* Skip past any preceding delimiters */
for (w = line; *w; w++) {
for (d = delim; *d && (*d != *w); d++);
if (!*d)
break;
}
if (!*w)
return -1;
*word = w; /* Beginning of word */
/* Skip until first delimiter char */
for (w++; *w; w++) {
for (d = delim; *d && (*d != *w); d++);
if (*d)
break;
}
/* Replace delimiter with NULL char, but return the original first */
*delimfound = *w;
*w = '\0';
return (w - *word);
}
strfuncs.h
Miscellaneous useful string functions.
STRING_START
Beginning of string.
Definition: strfuncs.h:71
ckd_calloc
#define ckd_calloc(n, sz)
Macros to simplify the use of above functions.
Definition: ckd_alloc.h:248
ckd_alloc.h
Sphinx's memory allocation/deallocation routines.
atof_c
SPHINXBASE_EXPORT double atof_c(char const *str)
Locale independent version of atof().
Definition: strfuncs.c:56
STRING_BOTH
Both ends of string.
Definition: strfuncs.h:73
STRING_END
End of string.
Definition: strfuncs.h:72
str2words
SPHINXBASE_EXPORT int32 str2words(char *line, char **wptr, int32 n_wptr)
Convert a line to an array of "words", based on whitespace separators.
Definition: strfuncs.c:115
string_join
SPHINXBASE_EXPORT char * string_join(const char *base,...)
Concatenate a NULL-terminated argument list of strings, returning a newly allocated string...
Definition: strfuncs.c:62
nextword
SPHINXBASE_EXPORT int32 nextword(char *line, const char *delim, char **word, char *delimfound)
Yet another attempt at a clean "next-word-in-string" function.
Definition: strfuncs.c:158
string_trim
SPHINXBASE_EXPORT char * string_trim(char *string, enum string_edge_e which)
Remove whitespace from a string, modifying it in-place.
Definition: strfuncs.c:89
string_edge_e
string_edge_e
Which end of a string to operate on for string_trim().
Definition: strfuncs.h:70