libyahoo2/yahoo_util.c

   1 /*
   2  * libyahoo2: yahoo_util.c
   3  *
   4  * Copyright (C) 2002-2004, Philip S Tellis <philip.tellis AT gmx.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #if HAVE_CONFIG_H
  23 # include <config.h>
  24 #endif
  25
  26 #if STDC_HEADERS
  27 # include <string.h>
  28 #else
  29 # if !HAVE_STRCHR
  30 #  define strchr index
  31 #  define strrchr rindex
  32 # endif
  33 char *strchr(), *strrchr();
  34 # if !HAVE_MEMCPY
  35 #  define memcpy(d, s, n) bcopy ((s), (d), (n))
  36 #  define memmove(d, s, n) bcopy ((s), (d), (n))
  37 # endif
  38 #endif
  39
  40 #include "yahoo_util.h"
  41
  42 char *y_string_append(char *string, char *append)
  43 {
  44         int size = strlen(string) + strlen(append) + 1;
  45         char *new_string = y_renew(char, string, size);
  46
  47         if (new_string == NULL) {
  48                 new_string = y_new(char, size);
  49                 strcpy(new_string, string);
  50                 FREE(string);
  51         }
  52
  53         strcat(new_string, append);
  54
  55         return new_string;
  56 }
  57
  58 char *y_str_to_utf8(const char *in)
  59 {
  60         unsigned int n, i = 0;
  61         char *result = NULL;
  62
  63         if (in == NULL || *in == '\0')
  64                 return strdup("");
  65
  66         result = y_new(char, strlen(in) * 2 + 1);
  67
  68         /* convert a string to UTF-8 Format */
  69         for (n = 0; n < strlen(in); n++) {
  70                 unsigned char c = (unsigned char)in[n];
  71
  72                 if (c < 128) {
  73                         result[i++] = (char)c;
  74                 } else {
  75                         result[i++] = (char)((c >> 6) | 192);
  76                         result[i++] = (char)((c & 63) | 128);
  77                 }
  78         }
  79         result[i] = '\0';
  80         return result;
  81 }
  82
  83 char *y_utf8_to_str(const char *in)
  84 {
  85         int i = 0;
  86         unsigned int n;
  87         char *result = NULL;
  88
  89         if (in == NULL || *in == '\0')
  90                 return strdup("");
  91
  92         result = y_new(char, strlen(in) + 1);
  93
  94         /* convert a string from UTF-8 Format */
  95         for (n = 0; n < strlen(in); n++) {
  96                 unsigned char c = in[n];
  97
  98                 if (c < 128) {
  99                         result[i++] = (char)c;
 100                 } else {
 101                         result[i++] = (c << 6) | (in[++n] & 63);
 102                 }
 103         }
 104         result[i] = '\0';
 105         return result;
 106 }
 107
 108 #if !HAVE_GLIB
 109
 110 void y_strfreev(char **vector)
 111 {
 112         char **v;
 113         for (v = vector; *v; v++) {
 114                 FREE(*v);
 115         }
 116         FREE(vector);
 117 }
 118
 119 char **y_strsplit(char *str, char *sep, int nelem)
 120 {
 121         char **vector;
 122         char *s, *p;
 123         int i = 0;
 124         int l = strlen(sep);
 125         if (nelem <= 0) {
 126                 char *s;
 127                 nelem = 0;
 128                 if (*str) {
 129                         for (s = strstr(str, sep); s;
 130                                 s = strstr(s + l, sep), nelem++) ;
 131                         if (strcmp(str + strlen(str) - l, sep))
 132                                 nelem++;
 133                 }
 134         }
 135
 136         vector = y_new(char *, nelem + 1);
 137
 138         for (p = str, s = strstr(p, sep); i < nelem && s;
 139                 p = s + l, s = strstr(p, sep), i++) {
 140                 int len = s - p;
 141                 vector[i] = y_new(char, len + 1);
 142                 strncpy(vector[i], p, len);
 143                 vector[i][len] = '\0';
 144         }
 145
 146         if (i < nelem && *str)  /* str didn't end with sep, and str isn't empty */
 147                 vector[i++] = strdup(p);
 148
 149         vector[i] = NULL;
 150
 151         return vector;
 152 }
 153
 154 void *y_memdup(const void *addr, int n)
 155 {
 156         void *new_chunk = malloc(n);
 157         if (new_chunk)
 158                 memcpy(new_chunk, addr, n);
 159         return new_chunk;
 160 }
 161
 162 #endif