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  1. /*
  2.  * Copyright (c) 2006 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup libc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef LIBC_CTYPE_H_
  36. #define LIBC_CTYPE_H_
  37.  
  38. static inline int islower(int c)
  39. {
  40.     return ((c >= 'a') && (c <= 'z'));
  41. }
  42.  
  43. static inline int isupper(int c)
  44. {
  45.     return ((c >= 'A') && (c <= 'Z'));
  46. }
  47.  
  48. static inline int isalpha(int c)
  49. {
  50.     return (islower(c) || isupper(c));
  51. }
  52.  
  53. static inline int isdigit(int c)
  54. {
  55.     return ((c >= '0') && (c <= '9'));
  56. }
  57.  
  58. static inline int isalnum(int c)
  59. {
  60.     return (isalpha(c) || isdigit(c));
  61. }
  62.  
  63. static inline int isspace(int c)
  64. {
  65.     switch (c) {
  66.     case ' ':
  67.     case '\n':
  68.     case '\t':
  69.     case '\f':
  70.     case '\r':
  71.     case '\v':
  72.         return 1;
  73.         break;
  74.     default:
  75.         return 0;
  76.     }
  77. }
  78.  
  79. static inline int tolower(int c)
  80. {
  81.     if (isupper(c))
  82.         return (c + ('a' - 'A'));
  83.     else
  84.         return c;
  85. }
  86.  
  87. static inline int toupper(int c)
  88. {
  89.     if (islower(c))
  90.         return (c + ('A' - 'a'));
  91.     else
  92.         return c;
  93. }
  94.  
  95. #endif
  96.  
  97. /** @}
  98.  */
  99.