src/gallium/auxiliary/util/u_string.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * Platform independent functions for string manipulation.
  31  *
  32  * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
  33  */
  34
  35 #ifndef U_STRING_H_
  36 #define U_STRING_H_
  37
  38 #ifndef WIN32
  39 #include <stdio.h>
  40 #endif
  41 #include <stddef.h>
  42 #include <stdarg.h>
  43
  44 #include "pipe/p_compiler.h"
  45
  46
  47 #ifdef __cplusplus
  48 extern "C" {
  49 #endif
  50
  51
  52 #ifdef WIN32
  53
  54 int util_vsnprintf(char *, size_t, const char *, va_list);
  55 int util_snprintf(char *str, size_t size, const char *format, ...);
  56
  57 static INLINE void
  58 util_sprintf(char *str, const char *format, ...)
  59 {
  60    va_list ap;
  61    va_start(ap, format);
  62    util_vsnprintf(str, (size_t)-1, format, ap);
  63    va_end(ap);
  64 }
  65
  66 static INLINE char *
  67 util_strchr(const char *s, char c)
  68 {
  69    while(*s) {
  70       if(*s == c)
  71          return (char *)s;
  72       ++s;
  73    }
  74    return NULL;
  75 }
  76
  77 static INLINE char*
  78 util_strncat(char *dst, const char *src, size_t n)
  79 {
  80    char *p = dst + strlen(dst);
  81    const char *q = src;
  82    size_t i;
  83
  84    for (i = 0; i < n && *q != '\0'; ++i)
  85        *p++ = *q++;
  86    *p = '\0';
  87
  88    return dst;
  89 }
  90
  91 static INLINE int
  92 util_strcmp(const char *s1, const char *s2)
  93 {
  94    unsigned char u1, u2;
  95
  96    while (1) {
  97       u1 = (unsigned char) *s1++;
  98       u2 = (unsigned char) *s2++;
  99       if (u1 != u2)
 100          return u1 - u2;
 101       if (u1 == '\0')
 102          return 0;
 103    }
 104    return 0;
 105 }
 106
 107 static INLINE int
 108 util_strncmp(const char *s1, const char *s2, size_t n)
 109 {
 110    unsigned char u1, u2;
 111
 112    while (n-- > 0) {
 113       u1 = (unsigned char) *s1++;
 114       u2 = (unsigned char) *s2++;
 115       if (u1 != u2)
 116          return u1 - u2;
 117       if (u1 == '\0')
 118          return 0;
 119    }
 120    return 0;
 121 }
 122
 123 static INLINE char *
 124 util_strstr(const char *haystack, const char *needle)
 125 {
 126    const char *p = haystack;
 127    int len = strlen(needle);
 128
 129    for (; (p = util_strchr(p, *needle)) != 0; p++) {
 130       if (util_strncmp(p, needle, len) == 0) {
 131          return (char *)p;
 132       }
 133    }
 134    return NULL;
 135 }
 136
 137 static INLINE void *
 138 util_memmove(void *dest, const void *src, size_t n)
 139 {
 140    char *p = (char *)dest;
 141    const char *q = (const char *)src;
 142    if (dest < src) {
 143       while (n--)
 144          *p++ = *q++;
 145    }
 146    else
 147    {
 148       p += n;
 149       q += n;
 150       while (n--)
 151          *--p = *--q;
 152    }
 153    return dest;
 154 }
 155
 156
 157 #else
 158
 159 #define util_vsnprintf vsnprintf
 160 #define util_snprintf snprintf
 161 #define util_sprintf sprintf
 162 #define util_strchr strchr
 163 #define util_strcmp strcmp
 164 #define util_strncmp strncmp
 165 #define util_strncat strncat
 166 #define util_strstr strstr
 167 #define util_memmove memmove
 168
 169 #endif
 170
 171
 172 #ifdef __cplusplus
 173 }
 174 #endif
 175
 176 #endif /* U_STRING_H_ */