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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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 TUNGSTEN GRAPHICS 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 <jrfonseca@tungstengraphics.com>
*/
#ifndef U_STRING_H_
#define U_STRING_H_
#if !defined(_WIN32) && !defined(XF86_LIBC_H)
#include <stdio.h>
#endif
#include <stddef.h>
#include <stdarg.h>
#include "pipe/p_compiler.h"
#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
int util_vsnprintf(char *, size_t, const char *, va_list);
int util_snprintf(char *str, size_t size, const char *format, ...);
static INLINE void
util_vsprintf(char *str, const char *format, va_list ap)
{
util_vsnprintf(str, (size_t)-1, format, ap);
}
static INLINE void
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 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;
}
static INLINE void *
util_memmove(void *dest, const void *src, size_t n)
{
char *p = (char *)dest;
const char *q = (const char *)src;
if (dest < src) {
while (n--)
*p++ = *q++;
}
else
{
p += n;
q += n;
while (n--)
*--p = *--q;
}
return dest;
}
#else
#define util_vsnprintf vsnprintf
#define util_snprintf snprintf
#define util_vsprintf vsprintf
#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_memmove memmove
#endif
/**
* Printable string buffer
*/
struct util_strbuf
{
char *str;
char *ptr;
size_t left;
};
static INLINE void
util_strbuf_init(struct util_strbuf *sbuf, char *str, size_t size)
{
sbuf->str = str;
sbuf->str[0] = 0;
sbuf->ptr = sbuf->str;
sbuf->left = size;
}
static INLINE void
util_strbuf_printf(struct util_strbuf *sbuf, const char *format, ...)
{
if(sbuf->left > 1) {
size_t written;
va_list ap;
va_start(ap, format);
written = util_vsnprintf(sbuf->ptr, sbuf->left, format, ap);
va_end(ap);
sbuf->ptr += written;
sbuf->left -= written;
}
}
#ifdef __cplusplus
}
#endif
#endif /* U_STRING_H_ */
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