newlib-cygwin/newlib/libc/argz/envz_entry.c

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/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
#include <errno.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <envz.h>
extern int buf_findstr(const char *str, char **buf, size_t *buf_len);
char *
envz_entry (const char *envz, size_t envz_len, const char *name)
{
const char *buf_ptr = envz;
size_t buf_len = envz_len;
while(buf_len)
{
if (buf_findstr(name, &buf_ptr, &buf_len))
{
if (buf_ptr)
{
if (*buf_ptr == '=' || *buf_ptr == '\0')
{
buf_ptr--;
/* Move buf_ptr back to start of entry. */
while(*buf_ptr != '\0' && buf_ptr != envz) buf_ptr--;
if(*buf_ptr == '\0')
buf_ptr++;
return buf_ptr;
}
}
}
}
return 0;
}