SRB2/src/string.c

94 lines
2 KiB
C

// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 2006 by Graue.
// Copyright (C) 2006-2023 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file string.c
/// \brief String functions that we need but are missing on some
/// operating systems.
#include <stddef.h>
#include <string.h>
#include "doomdef.h"
#ifndef SRB2_HAVE_STRLCPY
// Like the OpenBSD version, but it doesn't check for src not being a valid
// C string.
size_t strlcat(char *dst, const char *src, size_t siz)
{
size_t dstlen, n = siz;
char *p = dst;
dstlen = strlen(dst);
n -= dstlen;
p += dstlen;
while (n > 1 && *src != '\0')
{
*p++ = *src++;
n--;
}
if (n >= 1)
*p = '\0';
return strlen(src) + dstlen;
}
size_t strlcpy(char *dst, const char *src, size_t siz)
{
if (siz == 0)
return strlen(dst);
dst[0] = '\0';
return strlcat(dst, src, siz);
}
#endif
#include "strcasestr.c"
int startswith(const char *path, const char *tag)
{
return !strncmp(path, tag, strlen(tag));
}
int endswith(const char *base, const char *tag)
{
const size_t base_length = strlen(base);
const size_t tag_length = strlen(tag);
if (tag_length > base_length)
return false;
return !memcmp(&base[base_length - tag_length], tag, tag_length);
}
// strtok version that only skips over one delimiter at a time
char *xstrtok(char *line, const char *delims)
{
static char *saveline = NULL;
char *p;
if(line != NULL)
saveline = line;
// see if we have reached the end of the line
if(saveline == NULL || *saveline == '\0')
return NULL;
p = saveline; // save start of this token
saveline += strcspn(saveline, delims); // get the number of non-delims characters, go past delimiter
if(*saveline != '\0') // trash the delim if necessary
*saveline++ = '\0';
return p;
}