libguile/strorder.c

   1 /*      Copyright (C) 1995, 1996, 1999, 2000, 2004, 2006, 2008 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 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 #include "libguile/_scm.h"
  24 #include "libguile/chars.h"
  25 #include "libguile/strings.h"
  26 #include "libguile/symbols.h"
  27
  28 #include "libguile/validate.h"
  29 #include "libguile/strorder.h"
  30 #include "libguile/srfi-13.h"
  31 \f
  32
  33 SCM_C_INLINE_KEYWORD static SCM
  34 srfi13_cmp (SCM s1, SCM s2, SCM (*cmp) (SCM, SCM, SCM, SCM, SCM, SCM))
  35 {
  36   if (scm_is_true (cmp (s1, s2,
  37                         SCM_UNDEFINED, SCM_UNDEFINED,
  38                         SCM_UNDEFINED, SCM_UNDEFINED)))
  39     return SCM_BOOL_T;
  40   else
  41     return SCM_BOOL_F;
  42 }
  43
  44 SCM_DEFINE1 (scm_string_equal_p, "string=?", scm_tc7_rpsubr,
  45              (SCM s1, SCM s2),
  46             "Lexicographic equality predicate; return @code{#t} if the two\n"
  47             "strings are the same length and contain the same characters in\n"
  48             "the same positions, otherwise return @code{#f}.\n"
  49             "\n"
  50             "The procedure @code{string-ci=?} treats upper and lower case\n"
  51             "letters as though they were the same character, but\n"
  52             "@code{string=?} treats upper and lower case as distinct\n"
  53             "characters.")
  54 #define FUNC_NAME s_scm_string_equal_p
  55 {
  56   return srfi13_cmp (s1, s2, scm_string_eq);
  57 }
  58 #undef FUNC_NAME
  59
  60 SCM_DEFINE1 (scm_string_ci_equal_p, "string-ci=?", scm_tc7_rpsubr,
  61              (SCM s1, SCM s2),
  62             "Case-insensitive string equality predicate; return @code{#t} if\n"
  63             "the two strings are the same length and their component\n"
  64             "characters match (ignoring case) at each position; otherwise\n"
  65             "return @code{#f}.")
  66 #define FUNC_NAME s_scm_string_ci_equal_p
  67 {
  68   return srfi13_cmp (s1, s2, scm_string_ci_eq);
  69 }
  70 #undef FUNC_NAME
  71
  72 SCM_DEFINE1 (scm_string_less_p, "string<?", scm_tc7_rpsubr,
  73              (SCM s1, SCM s2),
  74             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
  75             "is lexicographically less than @var{s2}.")
  76 #define FUNC_NAME s_scm_string_less_p
  77 {
  78   return srfi13_cmp (s1, s2, scm_string_lt);
  79 }
  80 #undef FUNC_NAME
  81
  82 SCM_DEFINE1 (scm_string_leq_p, "string<=?", scm_tc7_rpsubr,
  83              (SCM s1, SCM s2),
  84             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
  85             "is lexicographically less than or equal to @var{s2}.")
  86 #define FUNC_NAME s_scm_string_leq_p
  87 {
  88   return srfi13_cmp (s1, s2, scm_string_le);
  89 }
  90 #undef FUNC_NAME
  91
  92 SCM_DEFINE1 (scm_string_gr_p, "string>?", scm_tc7_rpsubr,
  93              (SCM s1, SCM s2),
  94             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
  95             "is lexicographically greater than @var{s2}.")
  96 #define FUNC_NAME s_scm_string_gr_p
  97 {
  98   return srfi13_cmp (s1, s2, scm_string_gt);
  99 }
 100 #undef FUNC_NAME
 101
 102 SCM_DEFINE1 (scm_string_geq_p, "string>=?", scm_tc7_rpsubr,
 103              (SCM s1, SCM s2),
 104             "Lexicographic ordering predicate; return @code{#t} if @var{s1}\n"
 105             "is lexicographically greater than or equal to @var{s2}.")
 106 #define FUNC_NAME s_scm_string_geq_p
 107 {
 108   return srfi13_cmp (s1, s2, scm_string_ge);
 109 }
 110 #undef FUNC_NAME
 111
 112 SCM_DEFINE1 (scm_string_ci_less_p, "string-ci<?", scm_tc7_rpsubr,
 113              (SCM s1, SCM s2),
 114             "Case insensitive lexicographic ordering predicate; return\n"
 115             "@code{#t} if @var{s1} is lexicographically less than @var{s2}\n"
 116             "regardless of case.")
 117 #define FUNC_NAME s_scm_string_ci_less_p
 118 {
 119   return srfi13_cmp (s1, s2, scm_string_ci_lt);
 120 }
 121 #undef FUNC_NAME
 122
 123 SCM_DEFINE1 (scm_string_ci_leq_p, "string-ci<=?", scm_tc7_rpsubr,
 124              (SCM s1, SCM s2),
 125             "Case insensitive lexicographic ordering predicate; return\n"
 126             "@code{#t} if @var{s1} is lexicographically less than or equal\n"
 127             "to @var{s2} regardless of case.")
 128 #define FUNC_NAME s_scm_string_ci_leq_p
 129 {
 130   return srfi13_cmp (s1, s2, scm_string_ci_le);
 131 }
 132 #undef FUNC_NAME
 133
 134 SCM_DEFINE1 (scm_string_ci_gr_p, "string-ci>?", scm_tc7_rpsubr,
 135              (SCM s1, SCM s2),
 136             "Case insensitive lexicographic ordering predicate; return\n"
 137             "@code{#t} if @var{s1} is lexicographically greater than\n"
 138             "@var{s2} regardless of case.")
 139 #define FUNC_NAME s_scm_string_ci_gr_p
 140 {
 141   return srfi13_cmp (s1, s2, scm_string_ci_gt);
 142 }
 143 #undef FUNC_NAME
 144
 145 SCM_DEFINE1 (scm_string_ci_geq_p, "string-ci>=?", scm_tc7_rpsubr,
 146              (SCM s1, SCM s2),
 147             "Case insensitive lexicographic ordering predicate; return\n"
 148             "@code{#t} if @var{s1} is lexicographically greater than or\n"
 149             "equal to @var{s2} regardless of case.")
 150 #define FUNC_NAME s_scm_string_ci_geq_p
 151 {
 152   return srfi13_cmp (s1, s2, scm_string_ci_ge);
 153 }
 154 #undef FUNC_NAME
 155
 156 \f
 157
 158 void
 159 scm_init_strorder ()
 160 {
 161 #include "libguile/strorder.x"
 162 }
 163
 164
 165 /*
 166   Local Variables:
 167   c-file-style: "gnu"
 168   End:
 169 */