libguile/strorder.c

   1 /*      Copyright (C) 1995, 1996, 1999, 2000, 2004 Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16  */
  17
  18 \f
  19
  20 #include "libguile/_scm.h"
  21 #include "libguile/chars.h"
  22 #include "libguile/strings.h"
  23 #include "libguile/symbols.h"
  24
  25 #include "libguile/validate.h"
  26 #include "libguile/strorder.h"
  27 #include "libguile/srfi-13.h"
  28 \f
  29
  30 SCM_C_INLINE_KEYWORD static SCM
  31 srfi13_cmp (SCM s1, SCM s2, SCM (*cmp) (SCM, SCM, SCM, SCM, SCM, SCM))
  32 {
  33   if (scm_is_true (cmp (s1, s2,
  34                         SCM_UNDEFINED, SCM_UNDEFINED,
  35                         SCM_UNDEFINED, SCM_UNDEFINED)))
  36     return SCM_BOOL_T;
  37   else
  38     return SCM_BOOL_F;
  39 }
  40
  41 SCM_DEFINE1 (scm_string_equal_p, "string=?", scm_tc7_rpsubr,
  42              (SCM s1, SCM s2),
  43             "Lexicographic equality predicate; return @code{#t} if the two\n"
  44             "strings are the same length and contain the same characters in\n"
  45             "the same positions, otherwise return @code{#f}.\n"
  46             "\n"
  47             "The procedure @code{string-ci=?} treats upper and lower case\n"
  48             "letters as though they were the same character, but\n"
  49             "@code{string=?} treats upper and lower case as distinct\n"
  50             "characters.")
  51 #define FUNC_NAME s_scm_string_equal_p
  52 {
  53   return srfi13_cmp (s1, s2, scm_string_eq);
  54 }
  55 #undef FUNC_NAME
  56
  57 SCM_DEFINE1 (scm_string_ci_equal_p, "string-ci=?", scm_tc7_rpsubr,
  58              (SCM s1, SCM s2),
  59             "Case-insensitive string equality predicate; return @code{#t} if\n"
  60             "the two strings are the same length and their component\n"
  61             "characters match (ignoring case) at each position; otherwise\n"
  62             "return @code{#f}.")
  63 #define FUNC_NAME s_scm_string_ci_equal_p
  64 {
  65   return srfi13_cmp (s1, s2, scm_string_ci_eq);
  66 }
  67 #undef FUNC_NAME
  68
  69 SCM_DEFINE1 (scm_string_less_p, "string<?", scm_tc7_rpsubr,
  70              (SCM s1, SCM s2),
  71             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
  72             "is lexicographically less than @var{s2}.")
  73 #define FUNC_NAME s_scm_string_less_p
  74 {
  75   return srfi13_cmp (s1, s2, scm_string_lt);
  76 }
  77 #undef FUNC_NAME
  78
  79 SCM_DEFINE1 (scm_string_leq_p, "string<=?", scm_tc7_rpsubr,
  80              (SCM s1, SCM s2),
  81             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
  82             "is lexicographically less than or equal to @var{s2}.")
  83 #define FUNC_NAME s_scm_string_leq_p
  84 {
  85   return srfi13_cmp (s1, s2, scm_string_le);
  86 }
  87 #undef FUNC_NAME
  88
  89 SCM_DEFINE1 (scm_string_gr_p, "string>?", scm_tc7_rpsubr,
  90              (SCM s1, SCM s2),
  91             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
  92             "is lexicographically greater than @var{s2}.")
  93 #define FUNC_NAME s_scm_string_gr_p
  94 {
  95   return srfi13_cmp (s1, s2, scm_string_gt);
  96 }
  97 #undef FUNC_NAME
  98
  99 SCM_DEFINE1 (scm_string_geq_p, "string>=?", scm_tc7_rpsubr,
 100              (SCM s1, SCM s2),
 101             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
 102             "is lexicographically greater than or equal to @var{s2}.")
 103 #define FUNC_NAME s_scm_string_geq_p
 104 {
 105   return srfi13_cmp (s1, s2, scm_string_ge);
 106 }
 107 #undef FUNC_NAME
 108
 109 SCM_DEFINE1 (scm_string_ci_less_p, "string-ci<?", scm_tc7_rpsubr,
 110              (SCM s1, SCM s2),
 111             "Case insensitive lexicographic ordering predicate; return\n"
 112             "@code{#t} if @var{s1} is lexicographically less than @var{s2}\n"
 113             "regardless of case.")
 114 #define FUNC_NAME s_scm_string_ci_less_p
 115 {
 116   return srfi13_cmp (s1, s2, scm_string_ci_lt);
 117 }
 118 #undef FUNC_NAME
 119
 120 SCM_DEFINE1 (scm_string_ci_leq_p, "string-ci<=?", scm_tc7_rpsubr,
 121              (SCM s1, SCM s2),
 122             "Case insensitive lexicographic ordering predicate; return\n"
 123             "@code{#t} if @var{s1} is lexicographically less than or equal\n"
 124             "to @var{s2} regardless of case.")
 125 #define FUNC_NAME s_scm_string_ci_leq_p
 126 {
 127   return srfi13_cmp (s1, s2, scm_string_ci_le);
 128 }
 129 #undef FUNC_NAME
 130
 131 SCM_DEFINE1 (scm_string_ci_gr_p, "string-ci>?", scm_tc7_rpsubr,
 132              (SCM s1, SCM s2),
 133             "Case insensitive lexicographic ordering predicate; return\n"
 134             "@code{#t} if @var{s1} is lexicographically greater than\n"
 135             "@var{s2} regardless of case.")
 136 #define FUNC_NAME s_scm_string_ci_gr_p
 137 {
 138   return srfi13_cmp (s1, s2, scm_string_ci_gt);
 139 }
 140 #undef FUNC_NAME
 141
 142 SCM_DEFINE1 (scm_string_ci_geq_p, "string-ci>=?", scm_tc7_rpsubr,
 143              (SCM s1, SCM s2),
 144             "Case insensitive lexicographic ordering predicate; return\n"
 145             "@code{#t} if @var{s1} is lexicographically greater than or\n"
 146             "equal to @var{s2} regardless of case.")
 147 #define FUNC_NAME s_scm_string_ci_geq_p
 148 {
 149   return srfi13_cmp (s1, s2, scm_string_ci_ge);
 150 }
 151 #undef FUNC_NAME
 152
 153 \f
 154
 155 void
 156 scm_init_strorder ()
 157 {
 158 #include "libguile/strorder.x"
 159 }
 160
 161
 162 /*
 163   Local Variables:
 164   c-file-style: "gnu"
 165   End:
 166 */