cups/string.c

   1 /*
   2  * "$Id: string.c,v 1.5.2.4 2002/05/09 02:22:09 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  *   This file is subject to the Apple OS-Developed Software exception.
  25  *
  26  * Contents:
  27  *
  28  *   ipp_strdup()      - Duplicate a string.
  29  *   ipp_strcasecmp()  - Do a case-insensitive comparison.
  30  *   ipp_strncasecmp() - Do a case-insensitive comparison on up to N chars.
  31  */
  32
  33 /*
  34  * Include necessary headers...
  35  */
  36
  37 #include "string.h"
  38
  39
  40 /*
  41  * 'ipp_strdup()' - Duplicate a string.
  42  */
  43
  44 #  ifndef HAVE_STRDUP
  45 char *                          /* O - New string pointer */
  46 ipp_strdup(const char *s)       /* I - String to duplicate */
  47 {
  48   char  *t;                     /* New string pointer */
  49
  50
  51   if (s == NULL)
  52     return (NULL);
  53
  54   if ((t = malloc(strlen(s) + 1)) == NULL)
  55     return (NULL);
  56
  57   return (strcpy(t, s));
  58 }
  59 #  endif /* !HAVE_STRDUP */
  60
  61
  62 /*
  63  * 'ipp_strcasecmp()' - Do a case-insensitive comparison.
  64  */
  65
  66 #  ifndef HAVE_STRCASECMP
  67 int                             /* O - Result of comparison (-1, 0, or 1) */
  68 ipp_strcasecmp(const char *s,   /* I - First string */
  69                const char *t)   /* I - Second string */
  70 {
  71   while (*s != '\0' && *t != '\0')
  72   {
  73     if (tolower(*s) < tolower(*t))
  74       return (-1);
  75     else if (tolower(*s) > tolower(*t))
  76       return (1);
  77
  78     s ++;
  79     t ++;
  80   }
  81
  82   if (*s == '\0' && *t == '\0')
  83     return (0);
  84   else if (*s != '\0')
  85     return (1);
  86   else
  87     return (-1);
  88 }
  89 #  endif /* !HAVE_STRCASECMP */
  90
  91 /*
  92  * 'ipp_strncasecmp()' - Do a case-insensitive comparison on up to N chars.
  93  */
  94
  95 #  ifndef HAVE_STRNCASECMP
  96 int                             /* O - Result of comparison (-1, 0, or 1) */
  97 ipp_strncasecmp(const char *s,  /* I - First string */
  98                 const char *t,  /* I - Second string */
  99                 size_t     n)   /* I - Maximum number of characters to compare */
 100 {
 101   while (*s != '\0' && *t != '\0' && n > 0)
 102   {
 103     if (tolower(*s) < tolower(*t))
 104       return (-1);
 105     else if (tolower(*s) > tolower(*t))
 106       return (1);
 107
 108     s ++;
 109     t ++;
 110     n --;
 111   }
 112
 113   if (n == 0)
 114     return (0);
 115   else if (*s == '\0' && *t == '\0')
 116     return (0);
 117   else if (*s != '\0')
 118     return (1);
 119   else
 120     return (-1);
 121 }
 122 #  endif /* !HAVE_STRNCASECMP */
 123
 124
 125 /*
 126  * End of "$Id: string.c,v 1.5.2.4 2002/05/09 02:22:09 mike Exp $".
 127  */