cutils.c

   1 /*
   2  * Simple C functions to supplement the C library
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "vl.h"
  25
  26 void pstrcpy(char *buf, int buf_size, const char *str)
  27 {
  28     int c;
  29     char *q = buf;
  30
  31     if (buf_size <= 0)
  32         return;
  33
  34     for(;;) {
  35         c = *str++;
  36         if (c == 0 || q >= buf + buf_size - 1)
  37             break;
  38         *q++ = c;
  39     }
  40     *q = '\0';
  41 }
  42
  43 /* strcat and truncate. */
  44 char *pstrcat(char *buf, int buf_size, const char *s)
  45 {
  46     int len;
  47     len = strlen(buf);
  48     if (len < buf_size)
  49         pstrcpy(buf + len, buf_size - len, s);
  50     return buf;
  51 }
  52
  53 int strstart(const char *str, const char *val, const char **ptr)
  54 {
  55     const char *p, *q;
  56     p = str;
  57     q = val;
  58     while (*q != '\0') {
  59         if (*p != *q)
  60             return 0;
  61         p++;
  62         q++;
  63     }
  64     if (ptr)
  65         *ptr = p;
  66     return 1;
  67 }
  68
  69 int stristart(const char *str, const char *val, const char **ptr)
  70 {
  71     const char *p, *q;
  72     p = str;
  73     q = val;
  74     while (*q != '\0') {
  75         if (toupper(*p) != toupper(*q))
  76             return 0;
  77         p++;
  78         q++;
  79     }
  80     if (ptr)
  81         *ptr = p;
  82     return 1;
  83 }
  84 /*
  85  * Simple C functions to supplement the C library
  86  *
  87  * Copyright (c) 2006 Fabrice Bellard
  88  *
  89  * Permission is hereby granted, free of charge, to any person obtaining a copy
  90  * of this software and associated documentation files (the "Software"), to deal
  91  * in the Software without restriction, including without limitation the rights
  92  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  93  * copies of the Software, and to permit persons to whom the Software is
  94  * furnished to do so, subject to the following conditions:
  95  *
  96  * The above copyright notice and this permission notice shall be included in
  97  * all copies or substantial portions of the Software.
  98  *
  99  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 100  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 101  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 102  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 103  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 104  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 105  * THE SOFTWARE.
 106  */
 107 #include "vl.h"
 108
 109 void pstrcpy(char *buf, int buf_size, const char *str)
 110 {
 111     int c;
 112     char *q = buf;
 113
 114     if (buf_size <= 0)
 115         return;
 116
 117     for(;;) {
 118         c = *str++;
 119         if (c == 0 || q >= buf + buf_size - 1)
 120             break;
 121         *q++ = c;
 122     }
 123     *q = '\0';
 124 }
 125
 126 /* strcat and truncate. */
 127 char *pstrcat(char *buf, int buf_size, const char *s)
 128 {
 129     int len;
 130     len = strlen(buf);
 131     if (len < buf_size)
 132         pstrcpy(buf + len, buf_size - len, s);
 133     return buf;
 134 }
 135
 136 int strstart(const char *str, const char *val, const char **ptr)
 137 {
 138     const char *p, *q;
 139     p = str;
 140     q = val;
 141     while (*q != '\0') {
 142         if (*p != *q)
 143             return 0;
 144         p++;
 145         q++;
 146     }
 147     if (ptr)
 148         *ptr = p;
 149     return 1;
 150 }
 151
 152 int stristart(const char *str, const char *val, const char **ptr)
 153 {
 154     const char *p, *q;
 155     p = str;
 156     q = val;
 157     while (*q != '\0') {
 158         if (toupper(*p) != toupper(*q))
 159             return 0;
 160         p++;
 161         q++;
 162     }
 163     if (ptr)
 164         *ptr = p;
 165     return 1;
 166 }