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238 lines
7.6 KiB
C
238 lines
7.6 KiB
C
/* Copyright (C) 1995, 1996, 1999 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include <stdio.h>
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#include "_scm.h"
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#include "chars.h"
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#include "scm_validate.h"
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#include "strorder.h"
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SCM_DEFINE1 (scm_string_equal_p, "string=?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Lexicographic equality predicate; \n"
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"Returns @t{#t} if the two strings are the same length and contain the same\n"
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"characters in the same positions, otherwise returns @t{#f}. (r5rs)\n\n"
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"@samp{String-ci=?} treats\n"
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"upper and lower case letters as though they were the same character, but\n"
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"@samp{string=?} treats upper and lower case as distinct characters.")
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#define FUNC_NAME s_scm_string_equal_p
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{
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register scm_sizet i;
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register unsigned char *c1, *c2;
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SCM_VALIDATE_ROSTRING (1,s1);
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SCM_VALIDATE_ROSTRING (2,s2);
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i = SCM_ROLENGTH (s2);
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if (SCM_ROLENGTH (s1) != i)
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{
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return SCM_BOOL_F;
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}
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c1 = SCM_ROUCHARS (s1);
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c2 = SCM_ROUCHARS (s2);
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while (0 != i--)
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if (*c1++ != *c2++)
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return SCM_BOOL_F;
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return SCM_BOOL_T;
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_ci_equal_p, "string-ci=?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Case-insensitive string equality predicate; returns @t{#t} if\n"
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"the two strings are the same length and their component characters\n"
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"match (ignoring case) at each position; otherwise returns @t{#f}. (r5rs)")
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#define FUNC_NAME s_scm_string_ci_equal_p
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{
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register scm_sizet i;
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register unsigned char *c1, *c2;
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SCM_VALIDATE_ROSTRING (1,s1);
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SCM_VALIDATE_ROSTRING (2,s2);
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i = SCM_ROLENGTH (s2);
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if (SCM_ROLENGTH (s1) != i)
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{
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return SCM_BOOL_F;
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}
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c1 = SCM_ROUCHARS (s1);
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c2 = SCM_ROUCHARS (s2);
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while (0 != i--)
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if (scm_upcase(*c1++) != scm_upcase(*c2++))
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return SCM_BOOL_F;
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return SCM_BOOL_T;
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_less_p, "string<?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Lexicographic ordering predicate; returns @t{#t} if @var{s1}\n"
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"is lexicographically less than @var{s2}. (r5rs)")
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#define FUNC_NAME s_scm_string_less_p
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{
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register scm_sizet i, len, s2len;
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register unsigned char *c1, *c2;
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register int c;
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SCM_VALIDATE_ROSTRING (1,s1);
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SCM_VALIDATE_ROSTRING (2,s2);
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len = SCM_ROLENGTH (s1);
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s2len = SCM_ROLENGTH (s2);
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if (len>s2len) len = s2len;
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c1 = SCM_ROUCHARS (s1);
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c2 = SCM_ROUCHARS (s2);
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for (i = 0;i<len;i++) {
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c = (*c1++ - *c2++);
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if (c>0)
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return SCM_BOOL_F;
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if (c<0)
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return SCM_BOOL_T;
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}
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{
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SCM answer;
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answer = SCM_BOOL(s2len != len);
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return answer;
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}
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_leq_p, "string<=?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Lexicographic ordering predicate; returns @t{#t} if @var{s1}\n"
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"is lexicographically less than or equal to @var{s2}. (r5rs)")
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#define FUNC_NAME s_scm_string_leq_p
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{
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return SCM_BOOL_NOT (scm_string_less_p (s2, s1));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_gr_p, "string>?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Lexicographic ordering predicate; returns @t{#t} if @var{s1}\n"
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"is lexicographically greater than @var{s2}. (r5rs)")
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#define FUNC_NAME s_scm_string_gr_p
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{
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return scm_string_less_p (s2, s1);
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_geq_p, "string>=?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Lexicographic ordering predicate; returns @t{#t} if @var{s1}\n"
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"is lexicographically greater than or equal to @var{s2}. (r5rs)")
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#define FUNC_NAME s_scm_string_geq_p
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{
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return SCM_BOOL_NOT (scm_string_less_p (s1, s2));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_ci_less_p, "string-ci<?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Case insensitive lexicographic ordering predicate; \n"
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"returns @t{#t} if @var{s1} is lexicographically less than\n"
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"@var{s2} regardless of case. (r5rs)")
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#define FUNC_NAME s_scm_string_ci_less_p
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{
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register scm_sizet i, len, s2len;
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register unsigned char *c1, *c2;
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register int c;
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SCM_VALIDATE_ROSTRING (1,s1);
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SCM_VALIDATE_ROSTRING (2,s2);
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len = SCM_ROLENGTH (s1);
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s2len = SCM_ROLENGTH (s2);
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if (len>s2len) len = s2len;
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c1 = SCM_ROUCHARS (s1);
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c2 = SCM_ROUCHARS (s2);
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for (i = 0;i<len;i++) {
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c = (scm_upcase(*c1++) - scm_upcase(*c2++));
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if (c>0) return SCM_BOOL_F;
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if (c<0) return SCM_BOOL_T;
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}
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return SCM_BOOL(s2len != len);
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_ci_leq_p, "string-ci<=?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Case insensitive lexicographic ordering predicate; \n"
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"returns @t{#t} if @var{s1} is lexicographically less than\n"
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"or equal to @var{s2} regardless of case. (r5rs)")
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#define FUNC_NAME s_scm_string_ci_leq_p
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{
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return SCM_BOOL_NOT (scm_string_ci_less_p (s2, s1));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_ci_gr_p, "string-ci>?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Case insensitive lexicographic ordering predicate; \n"
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"returns @t{#t} if @var{s1} is lexicographically greater than\n"
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"@var{s2} regardless of case. (r5rs)")
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#define FUNC_NAME s_scm_string_ci_gr_p
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{
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return scm_string_ci_less_p (s2, s1);
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_string_ci_geq_p, "string-ci>=?", scm_tc7_rpsubr,
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(SCM s1, SCM s2),
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"Case insensitive lexicographic ordering predicate; \n"
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"returns @t{#t} if @var{s1} is lexicographically greater than\n"
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"or equal to @var{s2} regardless of case. (r5rs)")
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#define FUNC_NAME s_scm_string_ci_geq_p
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{
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return SCM_BOOL_NOT (scm_string_ci_less_p (s1, s2));
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}
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#undef FUNC_NAME
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void
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scm_init_strorder ()
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{
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#include "strorder.x"
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}
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