cups/string.c

   1 /*
   2  * "$Id: string.c,v 1.6 2002/01/02 17:58:40 mike Exp $"
   3  *
   4  *   String functions for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 1997-2002 by Easy Software Products.
   7  *
   8  *   These coded instructions, statements, and computer programs are the
   9  *   property of Easy Software Products and are protected by Federal
  10  *   copyright law.  Distribution and use rights are outlined in the file
  11  *   "LICENSE.txt" which should have been included with this file.  If this
  12  *   file is missing or damaged please contact Easy Software Products
  13  *   at:
  14  *
  15  *       Attn: CUPS Licensing Information
  16  *       Easy Software Products
  17  *       44141 Airport View Drive, Suite 204
  18  *       Hollywood, Maryland 20636-3111 USA
  19  *
  20  *       Voice: (301) 373-9603
  21  *       EMail: cups-info@cups.org
  22  *         WWW: http://www.cups.org
  23  *
  24  * Contents:
  25  *
  26  *   strdup()      - Duplicate a string.
  27  *   strcasecmp()  - Do a case-insensitive comparison.
  28  *   strncasecmp() - Do a case-insensitive comparison on up to N chars.
  29  */
  30
  31 /*
  32  * Include necessary headers...
  33  */
  34
  35 #include "string.h"
  36
  37
  38 /*
  39  * 'strdup()' - Duplicate a string.
  40  */
  41
  42 #  ifndef HAVE_STRDUP
  43 char *                  /* O - New string pointer */
  44 strdup(const char *s)   /* I - String to duplicate */
  45 {
  46   char  *t;             /* New string pointer */
  47
  48
  49   if (s == NULL)
  50     return (NULL);
  51
  52   if ((t = malloc(strlen(s) + 1)) == NULL)
  53     return (NULL);
  54
  55   return (strcpy(t, s));
  56 }
  57 #  endif /* !HAVE_STRDUP */
  58
  59
  60 /*
  61  * 'strcasecmp()' - Do a case-insensitive comparison.
  62  */
  63
  64 #  ifndef HAVE_STRCASECMP
  65 int                             /* O - Result of comparison (-1, 0, or 1) */
  66 strcasecmp(const char *s,       /* I - First string */
  67            const char *t)       /* I - Second string */
  68 {
  69   while (*s != '\0' && *t != '\0')
  70   {
  71     if (tolower(*s) < tolower(*t))
  72       return (-1);
  73     else if (tolower(*s) > tolower(*t))
  74       return (1);
  75
  76     s ++;
  77     t ++;
  78   }
  79
  80   if (*s == '\0' && *t == '\0')
  81     return (0);
  82   else if (*s != '\0')
  83     return (1);
  84   else
  85     return (-1);
  86 }
  87 #  endif /* !HAVE_STRCASECMP */
  88
  89 /*
  90  * 'strncasecmp()' - Do a case-insensitive comparison on up to N chars.
  91  */
  92
  93 #  ifndef HAVE_STRNCASECMP
  94 int                             /* O - Result of comparison (-1, 0, or 1) */
  95 strncasecmp(const char *s,      /* I - First string */
  96             const char *t,      /* I - Second string */
  97             size_t     n)       /* I - Maximum number of characters to compare */
  98 {
  99   while (*s != '\0' && *t != '\0' && n > 0)
 100   {
 101     if (tolower(*s) < tolower(*t))
 102       return (-1);
 103     else if (tolower(*s) > tolower(*t))
 104       return (1);
 105
 106     s ++;
 107     t ++;
 108     n --;
 109   }
 110
 111   if (n == 0)
 112     return (0);
 113   else if (*s == '\0' && *t == '\0')
 114     return (0);
 115   else if (*s != '\0')
 116     return (1);
 117   else
 118     return (-1);
 119 }
 120 #  endif /* !HAVE_STRNCASECMP */
 121
 122
 123 /*
 124  * End of "$Id: string.c,v 1.6 2002/01/02 17:58:40 mike Exp $".
 125  */