eglib/src/gstring.c

   1 /*
   2  * String functions
   3  *
   4  * Author:
   5  *   Miguel de Icaza (miguel@novell.com)
   6  *   Aaron Bockover (abockover@novell.com)
   7  *
   8  * (C) 2006 Novell, Inc.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining
  11  * a copy of this software and associated documentation files (the
  12  * "Software"), to deal in the Software without restriction, including
  13  * without limitation the rights to use, copy, modify, merge, publish,
  14  * distribute, sublicense, and/or sell copies of the Software, and to
  15  * permit persons to whom the Software is furnished to do so, subject to
  16  * the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be
  19  * included in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28  */
  29 #include <stdio.h>
  30 #include <glib.h>
  31
  32 #define GROW_IF_NECESSARY(s,l) { \
  33         if(s->len + l >= s->allocated_len) { \
  34                 s->allocated_len = (s->allocated_len + l + 16) * 2; \
  35                 s->str = g_realloc(s->str, s->allocated_len); \
  36         } \
  37 }
  38
  39 GString *
  40 g_string_new_len (const gchar *init, gssize len)
  41 {
  42         GString *ret = g_new (GString, 1);
  43
  44         ret->len = len < 0 ? strlen(init) : len;
  45         ret->allocated_len = MAX(ret->len + 1, 16);
  46         ret->str = g_malloc(ret->allocated_len);
  47         memcpy(ret->str, init, ret->len);
  48         ret->str[ret->len] = 0;
  49
  50         return ret;
  51 }
  52
  53 GString *
  54 g_string_new (const gchar *init)
  55 {
  56         return g_string_new_len(init, -1);
  57 }
  58
  59 GString *
  60 g_string_sized_new (gsize default_size)
  61 {
  62         GString *ret = g_new (GString, 1);
  63
  64         ret->str = g_malloc (default_size);
  65         ret->str [0] = 0;
  66         ret->len = 0;
  67         ret->allocated_len = default_size;
  68
  69         return ret;
  70 }
  71
  72 gchar *
  73 g_string_free (GString *string, gboolean free_segment)
  74 {
  75         gchar *data;
  76
  77         g_return_val_if_fail (string != NULL, NULL);
  78
  79         data = string->str;
  80         g_free(string);
  81
  82         if(!free_segment) {
  83                 return data;
  84         }
  85
  86         g_free(data);
  87         return NULL;
  88 }
  89
  90 GString *
  91 g_string_append_len (GString *string, const gchar *val, gssize len)
  92 {
  93         g_return_val_if_fail(string != NULL, NULL);
  94         g_return_val_if_fail(val != NULL, string);
  95
  96         if(len < 0) {
  97                 len = strlen(val);
  98         }
  99
 100         GROW_IF_NECESSARY(string, len);
 101         memcpy(string->str + string->len, val, len);
 102         string->len += len;
 103         string->str[string->len] = 0;
 104
 105         return string;
 106 }
 107
 108 GString *
 109 g_string_append (GString *string, const gchar *val)
 110 {
 111         g_return_val_if_fail(string != NULL, NULL);
 112         g_return_val_if_fail(val != NULL, string);
 113
 114         return g_string_append_len(string, val, -1);
 115 }
 116
 117 GString *
 118 g_string_append_c (GString *string, gchar c)
 119 {
 120         g_return_val_if_fail(string != NULL, NULL);
 121
 122         GROW_IF_NECESSARY(string, 1);
 123
 124         string->str[string->len] = c;
 125         string->str[string->len + 1] = 0;
 126         string->len++;
 127
 128         return string;
 129 }
 130
 131 GString *
 132 g_string_prepend (GString *string, const gchar *val)
 133 {
 134         gssize len;
 135
 136         g_return_val_if_fail (string != NULL, string);
 137         g_return_val_if_fail (val != NULL, string);
 138
 139         len = strlen (val);
 140
 141         GROW_IF_NECESSARY(string, len);
 142         memmove(string->str + len, string->str, string->len + 1);
 143         memcpy(string->str, val, len);
 144
 145         return string;
 146 }
 147
 148 void
 149 g_string_append_printf (GString *string, const gchar *format, ...)
 150 {
 151         char *ret;
 152         va_list args;
 153
 154         g_return_if_fail (string != NULL);
 155         g_return_if_fail (format != NULL);
 156
 157         va_start (args, format);
 158         ret = g_strdup_vprintf (format, args);
 159         va_end (args);
 160         g_string_append (string, ret);
 161
 162         free (ret);
 163 }
 164
 165 void
 166 g_string_printf (GString *string, const gchar *format, ...)
 167 {
 168         va_list args;
 169
 170         g_return_if_fail (string != NULL);
 171         g_return_if_fail (format != NULL);
 172
 173         g_free (string->str);
 174
 175         va_start (args, format);
 176         string->str = g_strdup_vprintf (format, args);
 177         va_end (args);
 178
 179         string->len = strlen (string->str);
 180         string->allocated_len = string->len+1;
 181 }
 182
 183 GString *
 184 g_string_truncate (GString *string, gsize len)
 185 {
 186         g_return_val_if_fail (string != NULL, string);
 187
 188         /* Silent return */
 189         if (len < 0 || len >= string->len) {
 190                 return string;
 191         }
 192
 193         string->len = len;
 194         string->str[len] = 0;
 195         return string;
 196 }
 197