libguile/strorder.c

   1 /*      Copyright (C) 1995, 1996, 1999 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program 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
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41
  42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
  43    gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
  44 \f
  45
  46 #include <stdio.h>
  47 #include "_scm.h"
  48 #include "chars.h"
  49
  50 #include "scm_validate.h"
  51 #include "strorder.h"
  52 \f
  53
  54 SCM_DEFINE1 (scm_string_equal_p, "string=?", scm_tc7_rpsubr,
  55              (SCM s1, SCM s2),
  56 "")
  57 #define FUNC_NAME s_scm_string_equal_p
  58 {
  59   register scm_sizet i;
  60   register unsigned char *c1, *c2;
  61   SCM_VALIDATE_ROSTRING (1,s1);
  62   SCM_VALIDATE_ROSTRING (2,s2);
  63
  64   i = SCM_ROLENGTH (s2);
  65   if (SCM_ROLENGTH (s1) != i)
  66     {
  67       return SCM_BOOL_F;
  68     }
  69   c1 = SCM_ROUCHARS (s1);
  70   c2 = SCM_ROUCHARS (s2);
  71   while (0 != i--)
  72     if (*c1++ != *c2++)
  73       return SCM_BOOL_F;
  74   return SCM_BOOL_T;
  75 }
  76 #undef FUNC_NAME
  77
  78 SCM_DEFINE1 (scm_string_ci_equal_p, "string-ci=?", scm_tc7_rpsubr,
  79              (SCM s1, SCM s2),
  80 "")
  81 #define FUNC_NAME s_scm_string_ci_equal_p
  82 {
  83   register scm_sizet i;
  84   register unsigned char *c1, *c2;
  85   SCM_VALIDATE_ROSTRING (1,s1);
  86   SCM_VALIDATE_ROSTRING (2,s2);
  87
  88   i = SCM_ROLENGTH (s2);
  89   if (SCM_ROLENGTH (s1) != i)
  90     {
  91       return SCM_BOOL_F;
  92     }
  93   c1 = SCM_ROUCHARS (s1);
  94   c2 = SCM_ROUCHARS (s2);
  95   while (0 != i--)
  96     if (scm_upcase(*c1++) != scm_upcase(*c2++))
  97       return SCM_BOOL_F;
  98   return SCM_BOOL_T;
  99 }
 100 #undef FUNC_NAME
 101
 102 SCM_DEFINE1 (scm_string_less_p, "string<?", scm_tc7_rpsubr,
 103              (SCM s1, SCM s2),
 104 "")
 105 #define FUNC_NAME s_scm_string_less_p
 106 {
 107   register scm_sizet i, len, s2len;
 108   register unsigned char *c1, *c2;
 109   register int c;
 110
 111   SCM_VALIDATE_ROSTRING (1,s1);
 112   SCM_VALIDATE_ROSTRING (2,s2);
 113   len = SCM_ROLENGTH (s1);
 114   s2len = SCM_ROLENGTH (s2);
 115   if (len>s2len) len = s2len;
 116   c1 = SCM_ROUCHARS (s1);
 117   c2 = SCM_ROUCHARS (s2);
 118
 119   for (i = 0;i<len;i++) {
 120     c = (*c1++ - *c2++);
 121     if (c>0)
 122       return SCM_BOOL_F;
 123     if (c<0)
 124       return SCM_BOOL_T;
 125   }
 126   {
 127     SCM answer;
 128     answer = SCM_BOOL(s2len != len);
 129     return answer;
 130   }
 131 }
 132 #undef FUNC_NAME
 133
 134 SCM_DEFINE1 (scm_string_leq_p, "string<=?", scm_tc7_rpsubr,
 135              (SCM s1, SCM s2),
 136 "")
 137 #define FUNC_NAME s_scm_string_leq_p
 138 {
 139   return SCM_BOOL_NOT (scm_string_less_p (s2, s1));
 140 }
 141 #undef FUNC_NAME
 142
 143 SCM_DEFINE1 (scm_string_gr_p, "string>?", scm_tc7_rpsubr,
 144              (SCM s1, SCM s2),
 145 "")
 146 #define FUNC_NAME s_scm_string_gr_p
 147 {
 148   return scm_string_less_p (s2, s1);
 149 }
 150 #undef FUNC_NAME
 151
 152 SCM_DEFINE1 (scm_string_geq_p, "string>=?", scm_tc7_rpsubr,
 153              (SCM s1, SCM s2),
 154 "")
 155 #define FUNC_NAME s_scm_string_geq_p
 156 {
 157   return SCM_BOOL_NOT (scm_string_less_p (s1, s2));
 158 }
 159 #undef FUNC_NAME
 160
 161 SCM_DEFINE1 (scm_string_ci_less_p, "string-ci<?", scm_tc7_rpsubr,
 162              (SCM s1, SCM s2),
 163 "")
 164 #define FUNC_NAME s_scm_string_ci_less_p
 165 {
 166   register scm_sizet i, len, s2len;
 167   register unsigned char *c1, *c2;
 168   register int c;
 169   SCM_VALIDATE_ROSTRING (1,s1);
 170   SCM_VALIDATE_ROSTRING (2,s2);
 171   len = SCM_ROLENGTH (s1);
 172   s2len = SCM_ROLENGTH (s2);
 173   if (len>s2len) len = s2len;
 174   c1 = SCM_ROUCHARS (s1);
 175   c2 = SCM_ROUCHARS (s2);
 176   for (i = 0;i<len;i++) {
 177     c = (scm_upcase(*c1++) - scm_upcase(*c2++));
 178     if (c>0) return SCM_BOOL_F;
 179     if (c<0) return SCM_BOOL_T;
 180   }
 181   return SCM_BOOL(s2len != len);
 182 }
 183 #undef FUNC_NAME
 184
 185 SCM_DEFINE1 (scm_string_ci_leq_p, "string-ci<=?", scm_tc7_rpsubr,
 186              (SCM s1, SCM s2),
 187 "")
 188 #define FUNC_NAME s_scm_string_ci_leq_p
 189 {
 190   return SCM_BOOL_NOT (scm_string_ci_less_p (s2, s1));
 191 }
 192 #undef FUNC_NAME
 193
 194 SCM_DEFINE1 (scm_string_ci_gr_p, "string-ci>?", scm_tc7_rpsubr,
 195              (SCM s1, SCM s2),
 196 "")
 197 #define FUNC_NAME s_scm_string_ci_gr_p
 198 {
 199   return scm_string_ci_less_p (s2, s1);
 200 }
 201 #undef FUNC_NAME
 202
 203 SCM_DEFINE1 (scm_string_ci_geq_p, "string-ci>=?", scm_tc7_rpsubr,
 204              (SCM s1, SCM s2),
 205 "")
 206 #define FUNC_NAME s_scm_string_ci_geq_p
 207 {
 208   return SCM_BOOL_NOT (scm_string_ci_less_p (s1, s2));
 209 }
 210 #undef FUNC_NAME
 211
 212 \f
 213
 214 void
 215 scm_init_strorder ()
 216 {
 217 #include "strorder.x"
 218 }
 219