wsutil/str_util.c

   1 /* str_util.c
   2  * String utility routines
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <glib.h>
  28 #include "str_util.h"
  29
  30 #include <ctype.h>
  31
  32 /* Convert all ASCII letters to lower case, in place. */
  33 gchar *
  34 ascii_strdown_inplace(gchar *str)
  35 {
  36         gchar *s;
  37
  38         for (s = str; *s; s++)
  39                 *s = g_ascii_tolower (*s);
  40
  41         return (str);
  42 }
  43
  44 /* Convert all ASCII letters to upper case, in place. */
  45 gchar *
  46 ascii_strup_inplace(gchar *str)
  47 {
  48         gchar *s;
  49
  50         for (s = str; *s; s++)
  51                 *s = g_ascii_toupper (*s);
  52
  53         return (str);
  54 }
  55
  56 /* Check if an entire string is printable. */
  57 gboolean
  58 isprint_string(const gchar *str)
  59 {
  60         guint pos;
  61
  62         /* Loop until we reach the end of the string (a null) */
  63         for(pos = 0; str[pos] != '\0'; pos++){
  64                 if(!isprint(str[pos])){
  65                         /* The string contains a non-printable character */
  66                         return FALSE;
  67                 }
  68         }
  69
  70         /* The string contains only printable characters */
  71         return TRUE;
  72 }
  73
  74 /* Check if an entire string is digits. */
  75 gboolean
  76 isdigit_string(guchar *str)
  77 {
  78         guint pos;
  79
  80         /* Loop until we reach the end of the string (a null) */
  81         for(pos = 0; str[pos] != '\0'; pos++){
  82                 if(!isdigit(str[pos])){
  83                         /* The string contains a non-digit character */
  84                         return FALSE;
  85                 }
  86         }
  87
  88         /* The string contains only digits */
  89         return TRUE;
  90 }
  91
  92 #define FORMAT_SIZE_UNIT_MASK 0x00ff
  93 #define FORMAT_SIZE_PFX_MASK 0xff00
  94
  95 #ifdef HAVE_GLIB_PRINTF_GROUPING
  96 #define GROUP_FLAG "'"
  97 #else
  98 #define GROUP_FLAG ""
  99 #endif
 100
 101 /* Given a size, return its value in a human-readable format */
 102 gchar *format_size(gint64 size, format_size_flags_e flags) {
 103         GString *human_str = g_string_new("");
 104         int power = 1000;
 105         int pfx_off = 0;
 106         gboolean is_small = FALSE;
 107         static const gchar *prefix[] = {"T", "G", "M", "k", "Ti", "Gi", "Mi", "Ki"};
 108         gchar *ret_val;
 109
 110         if ((flags & FORMAT_SIZE_PFX_MASK) == format_size_prefix_iec) {
 111                 pfx_off = 4;
 112                 power = 1024;
 113         }
 114
 115         if (size / power / power / power / power >= 10) {
 116                 g_string_printf(human_str, "%" GROUP_FLAG G_GINT64_MODIFIER "d %s", size / power / power / power / power, prefix[pfx_off]);
 117         } else if (size / power / power / power >= 10) {
 118                 g_string_printf(human_str, "%" GROUP_FLAG G_GINT64_MODIFIER "d %s", size / power / power / power, prefix[pfx_off+1]);
 119         } else if (size / power / power >= 10) {
 120                 g_string_printf(human_str, "%" GROUP_FLAG G_GINT64_MODIFIER "d %s", size / power / power, prefix[pfx_off+2]);
 121         } else if (size / power >= 10) {
 122                 g_string_printf(human_str, "%" GROUP_FLAG G_GINT64_MODIFIER "d %s", size / power, prefix[pfx_off+3]);
 123         } else {
 124                 g_string_printf(human_str, "%" GROUP_FLAG G_GINT64_MODIFIER "d ", size);
 125                 is_small = TRUE;
 126         }
 127
 128         switch (flags & FORMAT_SIZE_UNIT_MASK) {
 129                 case format_size_unit_none:
 130                         break;
 131                 case format_size_unit_bytes:
 132                         g_string_append(human_str, is_small ? "bytes" : "B");
 133                         break;
 134                 case format_size_unit_bits:
 135                         g_string_append(human_str, is_small ? "bits" : "b");
 136                         break;
 137                 case format_size_unit_bits_s:
 138                         g_string_append(human_str, is_small ? "bits/s" : "bps");
 139                         break;
 140                 case format_size_unit_bytes_s:
 141                         g_string_append(human_str, is_small ? "bytes/s" : "Bps");
 142                         break;
 143                 default:
 144                         g_assert_not_reached();
 145         }
 146
 147         ret_val = human_str->str;
 148         g_string_free(human_str, FALSE);
 149         return ret_val;
 150 }