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/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Platform independent functions for string manipulation.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#ifndef U_STRING_H_
#define U_STRING_H_
#if !defined(XF86_LIBC_H)
#include <stdio.h>
#endif
#include <stddef.h>
#include <stdarg.h>
#include "util/macros.h" // PRINTFLIKE
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _GNU_SOURCE
#define util_strchrnul strchrnul
#else
static inline char *
util_strchrnul(const char *s, char c)
{
for (; *s && *s != c; ++s);
return (char *)s;
}
#endif
#ifdef _WIN32
static inline int
util_vsnprintf(char *str, size_t size, const char *format, va_list ap)
{
/* We need to use _vscprintf to calculate the length as vsnprintf returns -1
* if the number of characters to write is greater than count.
*/
va_list ap_copy;
int ret;
va_copy(ap_copy, ap);
ret = _vsnprintf(str, size, format, ap);
if (ret < 0) {
ret = _vscprintf(format, ap_copy);
}
return ret;
}
static inline int
PRINTFLIKE(3, 4)
util_snprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
int ret;
va_start(ap, format);
ret = util_vsnprintf(str, size, format, ap);
va_end(ap);
return ret;
}
static inline void
util_vsprintf(char *str, const char *format, va_list ap)
{
util_vsnprintf(str, (size_t)-1, format, ap);
}
static inline void
PRINTFLIKE(2, 3)
util_sprintf(char *str, const char *format, ...)
{
va_list ap;
va_start(ap, format);
util_vsnprintf(str, (size_t)-1, format, ap);
va_end(ap);
}
static inline int
util_vasprintf(char **ret, const char *format, va_list ap)
{
va_list ap_copy;
/* Compute length of output string first */
va_copy(ap_copy, ap);
int r = util_vsnprintf(NULL, 0, format, ap);
va_end(ap_copy);
if (r < 0)
return -1;
*ret = (char *) malloc(r + 1);
if (!ret)
return -1;
/* Print to buffer */
return util_vsnprintf(*ret, r + 1, format, ap);
}
static inline char *
util_strchr(const char *s, char c)
{
char *p = util_strchrnul(s, c);
return *p ? p : NULL;
}
static inline char*
util_strncat(char *dst, const char *src, size_t n)
{
char *p = dst + strlen(dst);
const char *q = src;
size_t i;
for (i = 0; i < n && *q != '\0'; ++i)
*p++ = *q++;
*p = '\0';
return dst;
}
static inline int
util_strcmp(const char *s1, const char *s2)
{
unsigned char u1, u2;
while (1) {
u1 = (unsigned char) *s1++;
u2 = (unsigned char) *s2++;
if (u1 != u2)
return u1 - u2;
if (u1 == '\0')
return 0;
}
return 0;
}
static inline int
util_strncmp(const char *s1, const char *s2, size_t n)
{
unsigned char u1, u2;
while (n-- > 0) {
u1 = (unsigned char) *s1++;
u2 = (unsigned char) *s2++;
if (u1 != u2)
return u1 - u2;
if (u1 == '\0')
return 0;
}
return 0;
}
static inline char *
util_strstr(const char *haystack, const char *needle)
{
const char *p = haystack;
size_t len = strlen(needle);
for (; (p = util_strchr(p, *needle)) != 0; p++) {
if (util_strncmp(p, needle, len) == 0) {
return (char *)p;
}
}
return NULL;
}
#define util_strcasecmp stricmp
#else
#define util_vsnprintf vsnprintf
#define util_snprintf snprintf
#define util_vsprintf vsprintf
#define util_vasprintf vasprintf
#define util_sprintf sprintf
#define util_strchr strchr
#define util_strcmp strcmp
#define util_strncmp strncmp
#define util_strncat strncat
#define util_strstr strstr
#define util_strcasecmp strcasecmp
#endif
#ifdef __cplusplus
}
#endif
#endif /* U_STRING_H_ */
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