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guile/srfi/srfi-13.c
Neil Jerram 9401323e63 * Documentation work.
2001-11-11 15:01:52 +00:00

3045 lines
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/* srfi-13.c --- SRFI-13 procedures for Guile
*
* Copyright (C) 2001 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives
* permission for additional uses of the text contained in its release
* of GUILE.
*
* The exception is that, if you link the GUILE library with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. Your use of that executable is in no way restricted on
* account of linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public
* License.
*
* This exception applies only to the code released by the Free
* Software Foundation under the name GUILE. If you copy code from
* other Free Software Foundation releases into a copy of GUILE, as
* the General Public License permits, the exception does not apply to
* the code that you add in this way. To avoid misleading anyone as
* to the status of such modified files, you must delete this
* exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
#include <string.h>
#include <ctype.h>
#include <libguile.h>
#include "srfi-13.h"
#include "srfi-14.h"
SCM_DEFINE (scm_string_any, "string-any", 2, 2, 0,
(SCM pred, SCM s, SCM start, SCM end),
"Check if the predicate @var{pred} is true for any character in\n"
"the string @var{s}, proceeding from left (index @var{start}) to\n"
"right (index @var{end}). If @code{string-any} returns true,\n"
"the returned true value is the one produced by the first\n"
"successful application of @var{pred}.")
#define FUNC_NAME s_scm_string_any
{
char * cstr;
int cstart, cend;
SCM res;
SCM_VALIDATE_PROC (1, pred);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s, cstr,
3, start, cstart,
4, end, cend);
cstr += cstart;
while (cstart < cend)
{
res = scm_call_1 (pred, SCM_MAKE_CHAR (*cstr));
if (!SCM_FALSEP (res))
return res;
cstr++;
cstart++;
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_every, "string-every", 2, 2, 0,
(SCM pred, SCM s, SCM start, SCM end),
"Check if the predicate @var{pred} is true for every character\n"
"in the string @var{s}, proceeding from left (index @var{start})\n"
"to right (index @var{end}). If @code{string-every} returns\n"
"true, the returned true value is the one produced by the final\n"
"application of @var{pred} to the last character of @var{s}.")
#define FUNC_NAME s_scm_string_every
{
char * cstr;
int cstart, cend;
SCM res;
SCM_VALIDATE_PROC (1, pred);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s, cstr,
3, start, cstart,
4, end, cend);
res = SCM_BOOL_F;
cstr += cstart;
while (cstart < cend)
{
res = scm_call_1 (pred, SCM_MAKE_CHAR (*cstr));
if (SCM_FALSEP (res))
return res;
cstr++;
cstart++;
}
return res;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_tabulate, "string-tabulate", 2, 0, 0,
(SCM proc, SCM len),
"@var{proc} is an integer->char procedure. Construct a string\n"
"of size @var{len} by applying @var{proc} to each index to\n"
"produce the corresponding string element. The order in which\n"
"@var{proc} is applied to the indices is not specified.")
#define FUNC_NAME s_scm_string_tabulate
{
int clen, i;
SCM res;
SCM ch;
char * p;
SCM_VALIDATE_PROC (1, proc);
SCM_VALIDATE_INUM_COPY (2, len, clen);
SCM_ASSERT_RANGE (2, len, clen >= 0);
res = scm_allocate_string (clen);
p = SCM_STRING_CHARS (res);
i = 0;
while (i < clen)
{
ch = scm_call_1 (proc, SCM_MAKINUM (i));
if (!SCM_CHARP (ch))
SCM_MISC_ERROR ("procedure ~S returned non-char", scm_list_1 (proc));
*p++ = SCM_CHAR (ch);
i++;
}
return res;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_to_listS, "string->list", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Convert the string @var{str} into a list of characters.")
#define FUNC_NAME s_scm_string_to_listS
{
char * cstr;
int cstart, cend;
SCM result = SCM_EOL;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
while (cstart < cend)
{
cend--;
result = scm_cons (SCM_MAKE_CHAR (cstr[cend]), result);
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_reverse_list_to_string, "reverse-list->string", 1, 0, 0,
(SCM chrs),
"An efficient implementation of @code{(compose string->list\n"
"reverse)}:\n"
"\n"
"@smalllisp\n"
"(reverse-list->string '(#\a #\B #\c)) @result{} \"cBa\"\n"
"@end smalllisp")
#define FUNC_NAME s_scm_reverse_list_to_string
{
SCM result;
long i = scm_ilength (chrs);
if (i < 0)
SCM_WRONG_TYPE_ARG (1, chrs);
result = scm_allocate_string (i);
{
unsigned char *data = SCM_STRING_UCHARS (result) + i;
while (!SCM_NULLP (chrs))
{
SCM elt = SCM_CAR (chrs);
SCM_VALIDATE_CHAR (SCM_ARGn, elt);
data--;
*data = SCM_CHAR (elt);
chrs = SCM_CDR (chrs);
}
}
return result;
}
#undef FUNC_NAME
SCM_SYMBOL (scm_sym_infix, "infix");
SCM_SYMBOL (scm_sym_strict_infix, "strict-infix");
SCM_SYMBOL (scm_sym_suffix, "suffix");
SCM_SYMBOL (scm_sym_prefix, "prefix");
SCM_DEFINE (scm_string_join, "string-join", 1, 2, 0,
(SCM ls, SCM delimiter, SCM grammar),
"Append the string in the string list @var{ls}, using the string\n"
"@var{delim} as a delimiter between the elements of @var{ls}.\n"
"@var{grammar} is a symbol which specifies how the delimiter is\n"
"placed between the strings, and defaults to the symbol\n"
"@code{infix}.\n"
"\n"
"@table @code\n"
"@item infix\n"
"Insert the separator between list elements. An empty string\n"
"will produce an empty list.\n"
"@item string-infix\n"
"Like @code{infix}, but will raise an error if given the empty\n"
"list.\n"
"@item suffix\n"
"Insert the separator after every list element.\n"
"@item prefix\n"
"Insert the separator before each list element.\n"
"@end table")
#define FUNC_NAME s_scm_string_join
{
#define GRAM_INFIX 0
#define GRAM_STRICT_INFIX 1
#define GRAM_SUFFIX 2
#define GRAM_PREFIX 3
SCM tmp;
SCM result;
int gram = GRAM_INFIX;
int del_len = 0, extra_len = 0;
int len = 0;
char * p;
long strings = scm_ilength (ls);
/* Validate the string list. */
if (strings < 0)
SCM_WRONG_TYPE_ARG (1, ls);
/* Validate the delimiter and record its length. */
if (SCM_UNBNDP (delimiter))
{
delimiter = scm_makfrom0str (" ");
del_len = 1;
}
else
{
SCM_VALIDATE_STRING (2, delimiter);
del_len = SCM_STRING_LENGTH (delimiter);
}
/* Validate the grammar symbol and remember the grammar. */
if (SCM_UNBNDP (grammar))
gram = GRAM_INFIX;
else if (SCM_EQ_P (grammar, scm_sym_infix))
gram = GRAM_INFIX;
else if (SCM_EQ_P (grammar, scm_sym_strict_infix))
gram = GRAM_STRICT_INFIX;
else if (SCM_EQ_P (grammar, scm_sym_suffix))
gram = GRAM_SUFFIX;
else if (SCM_EQ_P (grammar, scm_sym_prefix))
gram = GRAM_PREFIX;
else
SCM_WRONG_TYPE_ARG (3, grammar);
/* Check grammar constraints and calculate the space required for
the delimiter(s). */
switch (gram)
{
case GRAM_INFIX:
if (!SCM_NULLP (ls))
extra_len = (strings > 0) ? ((strings - 1) * del_len) : 0;
break;
case GRAM_STRICT_INFIX:
if (strings == 0)
SCM_MISC_ERROR ("strict-infix grammar requires non-empty list",
SCM_EOL);
extra_len = (strings - 1) * del_len;
break;
default:
extra_len = strings * del_len;
break;
}
tmp = ls;
while (SCM_CONSP (tmp))
{
SCM elt = SCM_CAR (tmp);
SCM_VALIDATE_STRING (1, elt);
len += SCM_STRING_LENGTH (elt);
tmp = SCM_CDR (tmp);
}
result = scm_allocate_string (len + extra_len);
p = SCM_STRING_CHARS (result);
tmp = ls;
switch (gram)
{
case GRAM_INFIX:
case GRAM_STRICT_INFIX:
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
memmove (p, SCM_STRING_CHARS (elt),
SCM_STRING_LENGTH (elt) * sizeof (char));
p += SCM_STRING_LENGTH (elt);
if (!SCM_NULLP (SCM_CDR (tmp)) && del_len > 0)
{
memmove (p, SCM_STRING_CHARS (delimiter),
SCM_STRING_LENGTH (delimiter) * sizeof (char));
p += del_len;
}
tmp = SCM_CDR (tmp);
}
break;
case GRAM_SUFFIX:
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
memmove (p, SCM_STRING_CHARS (elt),
SCM_STRING_LENGTH (elt) * sizeof (char));
p += SCM_STRING_LENGTH (elt);
if (del_len > 0)
{
memmove (p, SCM_STRING_CHARS (delimiter),
SCM_STRING_LENGTH (delimiter) * sizeof (char));
p += del_len;
}
tmp = SCM_CDR (tmp);
}
break;
case GRAM_PREFIX:
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
if (del_len > 0)
{
memmove (p, SCM_STRING_CHARS (delimiter),
SCM_STRING_LENGTH (delimiter) * sizeof (char));
p += del_len;
}
memmove (p, SCM_STRING_CHARS (elt),
SCM_STRING_LENGTH (elt) * sizeof (char));
p += SCM_STRING_LENGTH (elt);
tmp = SCM_CDR (tmp);
}
break;
}
return result;
#undef GRAM_INFIX
#undef GRAM_STRICT_INFIX
#undef GRAM_SUFFIX
#undef GRAM_PREFIX
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_copyS, "string-copy", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Return a freshly allocated copy of the string @var{str}. If\n"
"given, @var{start} and @var{end} delimit the portion of\n"
"@var{str} which is copied.")
#define FUNC_NAME s_scm_string_copyS
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return scm_mem2string (cstr + cstart, cend - cstart);
}
#undef FUNC_NAME
SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0,
(SCM str, SCM start, SCM end),
"Like @code{substring}, but the result may share memory with the\n"
"argument @var{str}.")
#define FUNC_NAME s_scm_substring_shared
{
SCM_VALIDATE_STRING (1, str);
SCM_VALIDATE_INUM (2, start);
if (SCM_UNBNDP (end))
end = SCM_MAKINUM (SCM_STRING_LENGTH (str));
else
SCM_VALIDATE_INUM (3, end);
if (SCM_INUM (start) == 0 &&
SCM_INUM (end) == SCM_STRING_LENGTH (str))
return str;
return scm_substring (str, start, end);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_copy_x, "string-copy!", 3, 2, 0,
(SCM target, SCM tstart, SCM s, SCM start, SCM end),
"Copy the sequence of characters from index range [@var{start},\n"
"@var{end}) in string @var{s} to string @var{target}, beginning\n"
"at index @var{tstart}. The characters are copied left-to-right\n"
"or right-to-left as needed -- the copy is guaranteed to work,\n"
"even if @var{target} and @var{s} are the same string. It is an\n"
"error if the copy operation runs off the end of the target\n"
"string.")
#define FUNC_NAME s_scm_string_copy_x
{
char * cstr, * ctarget;
int cstart, cend, ctstart, dummy;
int len;
SCM sdummy = SCM_UNDEFINED;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, target, ctarget,
2, tstart, ctstart,
2, sdummy, dummy);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (3, s, cstr,
4, start, cstart,
5, end, cend);
len = cend - cstart;
SCM_ASSERT_RANGE (3, s, len <= SCM_STRING_LENGTH (target) - ctstart);
memmove (SCM_STRING_CHARS (target) + ctstart,
SCM_STRING_CHARS (s) + cstart,
len * sizeof (char));
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_take, "string-take", 2, 0, 0,
(SCM s, SCM n),
"Return the @var{n} first characters of @var{s}.")
#define FUNC_NAME s_scm_string_take
{
char * cstr;
int cn;
SCM_VALIDATE_STRING_COPY (1, s, cstr);
SCM_VALIDATE_INUM_COPY (2, n, cn);
SCM_ASSERT_RANGE (2, n, cn >= 0 && cn <= SCM_STRING_LENGTH (s));
return scm_mem2string (cstr, cn);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_drop, "string-drop", 2, 0, 0,
(SCM s, SCM n),
"Return all but the first @var{n} characters of @var{s}.")
#define FUNC_NAME s_scm_string_drop
{
char * cstr;
int cn;
SCM_VALIDATE_STRING_COPY (1, s, cstr);
SCM_VALIDATE_INUM_COPY (2, n, cn);
SCM_ASSERT_RANGE (2, n, cn >= 0 && cn <= SCM_STRING_LENGTH (s));
return scm_mem2string (cstr + cn, SCM_STRING_LENGTH (s) - cn);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_take_right, "string-take-right", 2, 0, 0,
(SCM s, SCM n),
"Return the @var{n} last characters of @var{s}.")
#define FUNC_NAME s_scm_string_take_right
{
char * cstr;
int cn;
SCM_VALIDATE_STRING_COPY (1, s, cstr);
SCM_VALIDATE_INUM_COPY (2, n, cn);
SCM_ASSERT_RANGE (2, n, cn >= 0 && cn <= SCM_STRING_LENGTH (s));
return scm_mem2string (cstr + SCM_STRING_LENGTH (s) - cn, cn);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_drop_right, "string-drop-right", 2, 0, 0,
(SCM s, SCM n),
"Return all but the last @var{n} characters of @var{s}.")
#define FUNC_NAME s_scm_string_drop_right
{
char * cstr;
int cn;
SCM_VALIDATE_STRING_COPY (1, s, cstr);
SCM_VALIDATE_INUM_COPY (2, n, cn);
SCM_ASSERT_RANGE (2, n, cn >= 0 && cn <= SCM_STRING_LENGTH (s));
return scm_mem2string (cstr, SCM_STRING_LENGTH (s) - cn);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_pad, "string-pad", 2, 3, 0,
(SCM s, SCM len, SCM chr, SCM start, SCM end),
"Take that characters from @var{start} to @var{end} from the\n"
"string @var{s} and return a new string, right-padded by the\n"
"character @var{chr} to length @var{len}. If the resulting\n"
"string is longer than @var{len}, it is truncated on the right.")
#define FUNC_NAME s_scm_string_pad
{
char cchr;
char * cstr;
int cstart, cend, clen;
SCM result;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
4, start, cstart,
5, end, cend);
SCM_VALIDATE_INUM_COPY (2, len, clen);
if (SCM_UNBNDP (chr))
cchr = ' ';
else
{
SCM_VALIDATE_CHAR (3, chr);
cchr = SCM_CHAR (chr);
}
result = scm_allocate_string (clen);
if (clen < (cend - cstart))
memmove (SCM_STRING_CHARS (result),
cstr + cend - clen,
clen * sizeof (char));
else
{
memset (SCM_STRING_CHARS (result), cchr,
(clen - (cend - cstart)) * sizeof (char));
memmove (SCM_STRING_CHARS (result) + (clen - (cend - cstart)),
cstr + cstart,
(cend - cstart) * sizeof (char));
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_pad_right, "string-pad-right", 2, 3, 0,
(SCM s, SCM len, SCM chr, SCM start, SCM end),
"Take that characters from @var{start} to @var{end} from the\n"
"string @var{s} and return a new string, left-padded by the\n"
"character @var{chr} to length @var{len}. If the resulting\n"
"string is longer than @var{len}, it is truncated on the left.")
#define FUNC_NAME s_scm_string_pad_right
{
char cchr;
char * cstr;
int cstart, cend, clen;
SCM result;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
4, start, cstart,
5, end, cend);
SCM_VALIDATE_INUM_COPY (2, len, clen);
if (SCM_UNBNDP (chr))
cchr = ' ';
else
{
SCM_VALIDATE_CHAR (3, chr);
cchr = SCM_CHAR (chr);
}
result = scm_allocate_string (clen);
if (clen < (cend - cstart))
memmove (SCM_STRING_CHARS (result), cstr + cstart, clen * sizeof (char));
else
{
memset (SCM_STRING_CHARS (result) + (cend - cstart),
cchr, (clen - (cend - cstart)) * sizeof (char));
memmove (SCM_STRING_CHARS (result), cstr + cstart,
(cend - cstart) * sizeof (char));
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_trim, "string-trim", 1, 3, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Trim @var{s} by skipping over all characters on the left\n"
"that satisfy the parameter @var{char_pred}:\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"if it is the character @var{ch}, characters equal to\n"
"@var{ch} are trimmed,\n"
"\n"
"@item\n"
"if it is a procedure @var{pred} characters that\n"
"satisfy @var{pred} are trimmed,\n"
"\n"
"@item\n"
"if it is a character set, characters in that set are trimmed.\n"
"@end itemize\n"
"\n"
"If called without a @var{char_pred} argument, all whitespace is\n"
"trimmed.")
#define FUNC_NAME s_scm_string_trim
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_UNBNDP (char_pred))
{
while (cstart < cend)
{
if (!isspace(cstr[cstart]))
break;
cstart++;
}
}
else if (SCM_CHARP (char_pred))
{
char chr = SCM_CHAR (char_pred);
while (cstart < cend)
{
if (chr != cstr[cstart])
break;
cstart++;
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
if (!SCM_CHARSET_GET (char_pred, cstr[cstart]))
break;
cstart++;
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cstart]));
if (SCM_FALSEP (res))
break;
cstart++;
}
}
return scm_mem2string (cstr + cstart, cend - cstart);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_trim_right, "string-trim-right", 1, 3, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Trim @var{s} by skipping over all characters on the rightt\n"
"that satisfy the parameter @var{char_pred}:\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"if it is the character @var{ch}, characters equal to @var{ch}\n"
"are trimmed,\n"
"\n"
"@item\n"
"if it is a procedure @var{pred} characters that satisfy\n"
"@var{pred} are trimmed,\n"
"\n"
"@item\n"
"if it is a character sets, all characters in that set are\n"
"trimmed.\n"
"@end itemize\n"
"\n"
"If called without a @var{char_pred} argument, all whitespace is\n"
"trimmed.")
#define FUNC_NAME s_scm_string_trim_right
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_UNBNDP (char_pred))
{
while (cstart < cend)
{
if (!isspace(cstr[cend - 1]))
break;
cend--;
}
}
else if (SCM_CHARP (char_pred))
{
char chr = SCM_CHAR (char_pred);
while (cstart < cend)
{
if (chr != cstr[cend - 1])
break;
cend--;
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
if (!SCM_CHARSET_GET (char_pred, cstr[cend - 1]))
break;
cend--;
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cend - 1]));
if (SCM_FALSEP (res))
break;
cend--;
}
}
return scm_mem2string (cstr + cstart, cend - cstart);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_trim_both, "string-trim-both", 1, 3, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Trim @var{s} by skipping over all characters on both sides of\n"
"the string that satisfy the parameter @var{char_pred}:\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"if it is the character @var{ch}, characters equal to @var{ch}\n"
"are trimmed,\n"
"\n"
"@item\n"
"if it is a procedure @var{pred} characters that satisfy\n"
"@var{pred} are trimmed,\n"
"\n"
"@item\n"
"if it is a character set, the characters in the set are\n"
"trimmed.\n"
"@end itemize\n"
"\n"
"If called without a @var{char_pred} argument, all whitespace is\n"
"trimmed.")
#define FUNC_NAME s_scm_string_trim_both
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_UNBNDP (char_pred))
{
while (cstart < cend)
{
if (!isspace(cstr[cstart]))
break;
cstart++;
}
while (cstart < cend)
{
if (!isspace(cstr[cend - 1]))
break;
cend--;
}
}
else if (SCM_CHARP (char_pred))
{
char chr = SCM_CHAR (char_pred);
while (cstart < cend)
{
if (chr != cstr[cstart])
break;
cstart++;
}
while (cstart < cend)
{
if (chr != cstr[cend - 1])
break;
cend--;
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
if (!SCM_CHARSET_GET (char_pred, cstr[cstart]))
break;
cstart++;
}
while (cstart < cend)
{
if (!SCM_CHARSET_GET (char_pred, cstr[cend - 1]))
break;
cend--;
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cstart]));
if (SCM_FALSEP (res))
break;
cstart++;
}
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cend - 1]));
if (SCM_FALSEP (res))
break;
cend--;
}
}
return scm_mem2string (cstr + cstart, cend - cstart);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_fill_xS, "string-fill!", 2, 2, 0,
(SCM str, SCM chr, SCM start, SCM end),
"Stores @var{chr} in every element of the given @var{str} and\n"
"returns an unspecified value.")
#define FUNC_NAME s_scm_string_fill_xS
{
char * cstr;
int cstart, cend;
int c;
long k;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
3, start, cstart,
4, end, cend);
SCM_VALIDATE_CHAR_COPY (2, chr, c);
for (k = cstart; k < cend; k++)
cstr[k] = c;
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_compare, "string-compare", 5, 4, 0,
(SCM s1, SCM s2, SCM proc_lt, SCM proc_eq, SCM proc_gt, SCM start1, SCM end1, SCM start2, SCM end2),
"Apply @var{proc_lt}, @var{proc_eq}, @var{proc_gt} to the\n"
"mismatch index, depending upon whether @var{s1} is less than,\n"
"equal to, or greater than @var{s2}. The mismatch index is the\n"
"largest index @var{i} such that for every 0 <= @var{j} <\n"
"@var{i}, @var{s1}[@var{j}] = @var{s2}[@var{j}] -- that is,\n"
"@var{i} is the first position that does not match.")
#define FUNC_NAME s_scm_string_compare
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
6, start1, cstart1,
7, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
8, start2, cstart2,
9, end2, cend2);
SCM_VALIDATE_PROC (3, proc_lt);
SCM_VALIDATE_PROC (4, proc_eq);
SCM_VALIDATE_PROC (5, proc_gt);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return scm_call_1 (proc_lt, SCM_MAKINUM (cstart1));
else if (cstr1[cstart1] > cstr2[cstart2])
return scm_call_1 (proc_gt, SCM_MAKINUM (cstart1));
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return scm_call_1 (proc_gt, SCM_MAKINUM (cstart1));
else if (cstart2 < cend2)
return scm_call_1 (proc_lt, SCM_MAKINUM (cstart1));
else
return scm_call_1 (proc_eq, SCM_MAKINUM (cstart1));
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_compare_ci, "string-compare-ci", 5, 4, 0,
(SCM s1, SCM s2, SCM proc_lt, SCM proc_eq, SCM proc_gt, SCM start1, SCM end1, SCM start2, SCM end2),
"Apply @var{proc_lt}, @var{proc_eq}, @var{proc_gt} to the\n"
"mismatch index, depending upon whether @var{s1} is less than,\n"
"equal to, or greater than @var{s2}. The mismatch index is the\n"
"largest index @var{i} such that for every 0 <= @var{j} <\n"
"@var{i}, @var{s1}[@var{j}] = @var{s2}[@var{j}] -- that is,\n"
"@var{i} is the first position that does not match. The\n"
"character comparison is done case-insensitively.")
#define FUNC_NAME s_scm_string_compare_ci
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
6, start1, cstart1,
7, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
8, start2, cstart2,
9, end2, cend2);
SCM_VALIDATE_PROC (3, proc_lt);
SCM_VALIDATE_PROC (4, proc_eq);
SCM_VALIDATE_PROC (5, proc_gt);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return scm_call_1 (proc_lt, SCM_MAKINUM (cstart1));
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return scm_call_1 (proc_gt, SCM_MAKINUM (cstart1));
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return scm_call_1 (proc_gt, SCM_MAKINUM (cstart1));
else if (cstart2 < cend2)
return scm_call_1 (proc_lt, SCM_MAKINUM (cstart1));
else
return scm_call_1 (proc_eq, SCM_MAKINUM (cstart1));
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_eq, "string=", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} and @var{s2} are not equal, a true\n"
"value otherwise.")
#define FUNC_NAME s_scm_string_eq
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return SCM_BOOL_F;
else if (cstr1[cstart1] > cstr2[cstart2])
return SCM_BOOL_F;
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_BOOL_F;
else if (cstart2 < cend2)
return SCM_BOOL_F;
else
return SCM_MAKINUM (cstart1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_neq, "string<>", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} and @var{s2} are equal, a true\n"
"value otherwise.")
#define FUNC_NAME s_scm_string_neq
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return SCM_MAKINUM (cstart1);
else if (cstr1[cstart1] > cstr2[cstart2])
return SCM_MAKINUM (cstart1);
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_MAKINUM (cstart1);
else if (cstart2 < cend2)
return SCM_MAKINUM (cstart1);
else
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_lt, "string<", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is greater or equal to @var{s2}, a\n"
"true value otherwise.")
#define FUNC_NAME s_scm_string_lt
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return SCM_MAKINUM (cstart1);
else if (cstr1[cstart1] > cstr2[cstart2])
return SCM_BOOL_F;
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_BOOL_F;
else if (cstart2 < cend2)
return SCM_MAKINUM (cstart1);
else
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_gt, "string>", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is less or equal to @var{s2}, a\n"
"true value otherwise.")
#define FUNC_NAME s_scm_string_gt
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return SCM_BOOL_F;
else if (cstr1[cstart1] > cstr2[cstart2])
return SCM_MAKINUM (cstart1);
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_MAKINUM (cstart1);
else if (cstart2 < cend2)
return SCM_BOOL_F;
else
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_le, "string<=", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is greater to @var{s2}, a true\n"
"value otherwise.")
#define FUNC_NAME s_scm_string_le
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return SCM_MAKINUM (cstart1);
else if (cstr1[cstart1] > cstr2[cstart2])
return SCM_BOOL_F;
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_BOOL_F;
else if (cstart2 < cend2)
return SCM_MAKINUM (cstart1);
else
return SCM_MAKINUM (cstart1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ge, "string>=", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is less to @var{s2}, a true value\n"
"otherwise.")
#define FUNC_NAME s_scm_string_ge
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] < cstr2[cstart2])
return SCM_BOOL_F;
else if (cstr1[cstart1] > cstr2[cstart2])
return SCM_MAKINUM (cstart1);
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_MAKINUM (cstart1);
else if (cstart2 < cend2)
return SCM_BOOL_F;
else
return SCM_MAKINUM (cstart1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_eq, "string-ci=", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} and @var{s2} are not equal, a true\n"
"value otherwise. The character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_ci_eq
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return SCM_BOOL_F;
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return SCM_BOOL_F;
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_BOOL_F;
else if (cstart2 < cend2)
return SCM_BOOL_F;
else
return SCM_MAKINUM (cstart1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_neq, "string-ci<>", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} and @var{s2} are equal, a true\n"
"value otherwise. The character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_ci_neq
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (cstart1);
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (cstart1);
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_MAKINUM (cstart1);
else if (cstart2 < cend2)
return SCM_MAKINUM (cstart1);
else
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_lt, "string-ci<", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is greater or equal to @var{s2}, a\n"
"true value otherwise. The character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_ci_lt
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (cstart1);
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return SCM_BOOL_F;
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_BOOL_F;
else if (cstart2 < cend2)
return SCM_MAKINUM (cstart1);
else
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_gt, "string-ci>", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is less or equal to @var{s2}, a\n"
"true value otherwise. The character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_ci_gt
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return SCM_BOOL_F;
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (cstart1);
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_MAKINUM (cstart1);
else if (cstart2 < cend2)
return SCM_BOOL_F;
else
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_le, "string-ci<=", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is greater to @var{s2}, a true\n"
"value otherwise. The character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_ci_le
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (cstart1);
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return SCM_BOOL_F;
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_BOOL_F;
else if (cstart2 < cend2)
return SCM_MAKINUM (cstart1);
else
return SCM_MAKINUM (cstart1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_ge, "string-ci>=", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return @code{#f} if @var{s1} is less to @var{s2}, a true value\n"
"otherwise. The character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_ci_ge
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) < scm_downcase (cstr2[cstart2]))
return SCM_BOOL_F;
else if (scm_downcase (cstr1[cstart1]) > scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (cstart1);
cstart1++;
cstart2++;
}
if (cstart1 < cend1)
return SCM_MAKINUM (cstart1);
else if (cstart2 < cend2)
return SCM_BOOL_F;
else
return SCM_MAKINUM (cstart1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_prefix_length, "string-prefix-length", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return the length of the longest common prefix of the two\n"
"strings.")
#define FUNC_NAME s_scm_string_prefix_length
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] != cstr2[cstart2])
return SCM_MAKINUM (len);
len++;
cstart1++;
cstart2++;
}
return SCM_MAKINUM (len);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_prefix_length_ci, "string-prefix-length-ci", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return the length of the longest common prefix of the two\n"
"strings, ignoring character case.")
#define FUNC_NAME s_scm_string_prefix_length_ci
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) != scm_downcase (cstr2[cstart2]))
return SCM_MAKINUM (len);
len++;
cstart1++;
cstart2++;
}
return SCM_MAKINUM (len);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_suffix_length, "string-suffix-length", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return the length of the longest common suffix of the two\n"
"strings.")
#define FUNC_NAME s_scm_string_suffix_length
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
cend1--;
cend2--;
if (cstr1[cend1] != cstr2[cend2])
return SCM_MAKINUM (len);
len++;
}
return SCM_MAKINUM (len);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_suffix_length_ci, "string-suffix-length-ci", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return the length of the longest common suffix of the two\n"
"strings, ignoring character case.")
#define FUNC_NAME s_scm_string_suffix_length_ci
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
while (cstart1 < cend1 && cstart2 < cend2)
{
cend1--;
cend2--;
if (scm_downcase (cstr1[cend1]) != scm_downcase (cstr2[cend2]))
return SCM_MAKINUM (len);
len++;
}
return SCM_MAKINUM (len);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_prefix_p, "string-prefix?", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Is @var{s1} a prefix of @var{s2}?")
#define FUNC_NAME s_scm_string_prefix_p
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0, len1;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
len1 = cend1 - cstart1;
while (cstart1 < cend1 && cstart2 < cend2)
{
if (cstr1[cstart1] != cstr2[cstart2])
return SCM_BOOL (len == len1);
len++;
cstart1++;
cstart2++;
}
return SCM_BOOL (len == len1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_prefix_ci_p, "string-prefix-ci?", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Is @var{s1} a prefix of @var{s2}, ignoring character case?")
#define FUNC_NAME s_scm_string_prefix_ci_p
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0, len1;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
len1 = cend1 - cstart1;
while (cstart1 < cend1 && cstart2 < cend2)
{
if (scm_downcase (cstr1[cstart1]) != scm_downcase (cstr2[cstart2]))
return SCM_BOOL (len == len1);
len++;
cstart1++;
cstart2++;
}
return SCM_BOOL (len == len1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_suffix_p, "string-suffix?", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Is @var{s1} a suffix of @var{s2}?")
#define FUNC_NAME s_scm_string_suffix_p
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0, len1;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
len1 = cend1 - cstart1;
while (cstart1 < cend1 && cstart2 < cend2)
{
cend1--;
cend2--;
if (cstr1[cend1] != cstr2[cend2])
return SCM_BOOL (len == len1);
len++;
}
return SCM_BOOL (len == len1);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_suffix_ci_p, "string-suffix-ci?", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Is @var{s1} a suffix of @var{s2}, ignoring character case?")
#define FUNC_NAME s_scm_string_suffix_ci_p
{
char * cstr1, * cstr2;
int cstart1, cend1, cstart2, cend2;
int len = 0, len1;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
len1 = cend1 - cstart1;
while (cstart1 < cend1 && cstart2 < cend2)
{
cend1--;
cend2--;
if (scm_downcase (cstr1[cend1]) != scm_downcase (cstr2[cend2]))
return SCM_BOOL (len == len1);
len++;
}
return SCM_BOOL (len == len1);
}
#undef FUNC_NAME
/* FIXME::martin: The `S' is to avoid a name clash with the procedure
in the core, which does not accept a predicate. */
SCM_DEFINE (scm_string_indexS, "string-index", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Search through the string @var{s} from left to right, returning\n"
"the index of the first occurence of a character which\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"equals @var{char_pred}, if it is character,\n"
"\n"
"@item\n"
"satisifies the predicate @var{char_pred}, if it is a procedure,\n"
"\n"
"@item\n"
"is in the set @var{char_pred}, if it is a character set.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_indexS
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
char cchr = SCM_CHAR (char_pred);
while (cstart < cend)
{
if (cchr == cstr[cstart])
return SCM_MAKINUM (cstart);
cstart++;
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
if (SCM_CHARSET_GET (char_pred, cstr[cstart]))
return SCM_MAKINUM (cstart);
cstart++;
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cstart]));
if (!SCM_FALSEP (res))
return SCM_MAKINUM (cstart);
cstart++;
}
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_index_right, "string-index-right", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Search through the string @var{s} from right to left, returning\n"
"the index of the last occurence of a character which\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"equals @var{char_pred}, if it is character,\n"
"\n"
"@item\n"
"satisifies the predicate @var{char_pred}, if it is a procedure,\n"
"\n"
"@item\n"
"is in the set if @var{char_pred} is a character set.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_index_right
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
char cchr = SCM_CHAR (char_pred);
while (cstart < cend)
{
cend--;
if (cchr == cstr[cend])
return SCM_MAKINUM (cend);
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
cend--;
if (SCM_CHARSET_GET (char_pred, cstr[cend]))
return SCM_MAKINUM (cend);
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
cend--;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cend]));
if (!SCM_FALSEP (res))
return SCM_MAKINUM (cend);
}
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_skip, "string-skip", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Search through the string @var{s} from left to right, returning\n"
"the index of the first occurence of a character which\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"does not equal @var{char_pred}, if it is character,\n"
"\n"
"@item\n"
"does not satisify the predicate @var{char_pred}, if it is a\n"
"procedure,\n"
"\n"
"@item\n"
"is not in the set if @var{char_pred} is a character set.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_skip
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
char cchr = SCM_CHAR (char_pred);
while (cstart < cend)
{
if (cchr != cstr[cstart])
return SCM_MAKINUM (cstart);
cstart++;
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
if (!SCM_CHARSET_GET (char_pred, cstr[cstart]))
return SCM_MAKINUM (cstart);
cstart++;
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cstart]));
if (SCM_FALSEP (res))
return SCM_MAKINUM (cstart);
cstart++;
}
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_skip_right, "string-skip-right", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Search through the string @var{s} from right to left, returning\n"
"the index of the last occurence of a character which\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"does not equal @var{char_pred}, if it is character,\n"
"\n"
"@item\n"
"does not satisifie the predicate @var{char_pred}, if it is a\n"
"procedure,\n"
"\n"
"@item\n"
"is not in the set if @var{char_pred} is a character set.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_skip_right
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
char cchr = SCM_CHAR (char_pred);
while (cstart < cend)
{
cend--;
if (cchr != cstr[cend])
return SCM_MAKINUM (cend);
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
cend--;
if (!SCM_CHARSET_GET (char_pred, cstr[cend]))
return SCM_MAKINUM (cend);
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
cend--;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cend]));
if (SCM_FALSEP (res))
return SCM_MAKINUM (cend);
}
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_count, "string-count", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Return the count of the number of characters in the string\n"
"@var{s} which\n"
"\n"
"@itemize @bullet\n"
"@item\n"
"equals @var{char_pred}, if it is character,\n"
"\n"
"@item\n"
"satisifies the predicate @var{char_pred}, if it is a procedure.\n"
"\n"
"@item\n"
"is in the set @var{char_pred}, if it is a character set.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_count
{
char * cstr;
int cstart, cend;
int count = 0;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
char cchr = SCM_CHAR (char_pred);
while (cstart < cend)
{
if (cchr == cstr[cstart])
count++;
cstart++;
}
}
else if (SCM_CHARSETP (char_pred))
{
while (cstart < cend)
{
if (SCM_CHARSET_GET (char_pred, cstr[cstart]))
count++;
cstart++;
}
}
else
{
SCM_VALIDATE_PROC (2, char_pred);
while (cstart < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[cstart]));
if (!SCM_FALSEP (res))
count++;
cstart++;
}
}
return SCM_MAKINUM (count);
}
#undef FUNC_NAME
/* FIXME::martin: This should definitely get implemented more
efficiently -- maybe with Knuth-Morris-Pratt, like in the reference
implementation. */
SCM_DEFINE (scm_string_contains, "string-contains", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Does string @var{s1} contain string @var{s2}? Return the index\n"
"in @var{s1} where @var{s2} occurs as a substring, or false.\n"
"The optional start/end indices restrict the operation to the\n"
"indicated substrings.")
#define FUNC_NAME s_scm_string_contains
{
char * cs1, * cs2;
int cstart1, cend1, cstart2, cend2;
int len2, i, j;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cs1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cs2,
5, start2, cstart2,
6, end2, cend2);
len2 = cend2 - cstart2;
while (cstart1 <= cend1 - len2)
{
i = cstart1;
j = cstart2;
while (i < cend1 && j < cend2 && cs1[i] == cs2[j])
{
i++;
j++;
}
if (j == cend2)
return SCM_MAKINUM (cstart1);
cstart1++;
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
/* FIXME::martin: This should definitely get implemented more
efficiently -- maybe with Knuth-Morris-Pratt, like in the reference
implementation. */
SCM_DEFINE (scm_string_contains_ci, "string-contains-ci", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Does string @var{s1} contain string @var{s2}? Return the index\n"
"in @var{s1} where @var{s2} occurs as a substring, or false.\n"
"The optional start/end indices restrict the operation to the\n"
"indicated substrings. Character comparison is done\n"
"case-insensitively.")
#define FUNC_NAME s_scm_string_contains_ci
{
char * cs1, * cs2;
int cstart1, cend1, cstart2, cend2;
int len2, i, j;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cs1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cs2,
5, start2, cstart2,
6, end2, cend2);
len2 = cend2 - cstart2;
while (cstart1 <= cend1 - len2)
{
i = cstart1;
j = cstart2;
while (i < cend1 && j < cend2 &&
scm_downcase (cs1[i]) == scm_downcase (cs2[j]))
{
i++;
j++;
}
if (j == cend2)
return SCM_MAKINUM (cstart1);
cstart1++;
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
/* Helper function for the string uppercase conversion functions.
* No argument checking is performed. */
static SCM
string_upcase_x (SCM v, int start, int end)
{
unsigned long k;
for (k = start; k < end; ++k)
SCM_STRING_UCHARS (v) [k] = scm_upcase (SCM_STRING_UCHARS (v) [k]);
return v;
}
/* FIXME::martin: The `S' is to avoid a name clash with the procedure
in the core, which does not accept start/end indices */
SCM_DEFINE (scm_string_upcase_xS, "string-upcase!", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Destructively upcase every character in @code{str}.\n"
"\n"
"@lisp\n"
"(string-upcase! y)\n"
"@result{} \"ARRDEFG\"\n"
"y\n"
"@result{} \"ARRDEFG\"\n"
"@end lisp")
#define FUNC_NAME s_scm_string_upcase_xS
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return string_upcase_x (str, cstart, cend);
}
#undef FUNC_NAME
/* FIXME::martin: The `S' is to avoid a name clash with the procedure
in the core, which does not accept start/end indices */
SCM_DEFINE (scm_string_upcaseS, "string-upcase", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Upcase every character in @code{str}.")
#define FUNC_NAME s_scm_string_upcaseS
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return string_upcase_x (scm_string_copy (str), cstart, cend);
}
#undef FUNC_NAME
/* Helper function for the string lowercase conversion functions.
* No argument checking is performed. */
static SCM
string_downcase_x (SCM v, int start, int end)
{
unsigned long k;
for (k = start; k < end; ++k)
SCM_STRING_UCHARS (v) [k] = scm_downcase (SCM_STRING_UCHARS (v) [k]);
return v;
}
/* FIXME::martin: The `S' is to avoid a name clash with the procedure
in the core, which does not accept start/end indices */
SCM_DEFINE (scm_string_downcase_xS, "string-downcase!", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Destructively downcase every character in @var{str}.\n"
"\n"
"@lisp\n"
"y\n"
"@result{} \"ARRDEFG\"\n"
"(string-downcase! y)\n"
"@result{} \"arrdefg\"\n"
"y\n"
"@result{} \"arrdefg\"\n"
"@end lisp")
#define FUNC_NAME s_scm_string_downcase_xS
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return string_downcase_x (str, cstart, cend);
}
#undef FUNC_NAME
/* FIXME::martin: The `S' is to avoid a name clash with the procedure
in the core, which does not accept start/end indices */
SCM_DEFINE (scm_string_downcaseS, "string-downcase", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Downcase every character in @var{str}.")
#define FUNC_NAME s_scm_string_downcaseS
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return string_downcase_x (scm_string_copy (str), cstart, cend);
}
#undef FUNC_NAME
/* Helper function for the string capitalization functions.
* No argument checking is performed. */
static SCM
string_titlecase_x (SCM str, int start, int end)
{
char * sz;
int i, in_word = 0;
sz = SCM_STRING_CHARS (str);
for(i = start; i < end; i++)
{
if (!SCM_FALSEP (scm_char_alphabetic_p (SCM_MAKE_CHAR (sz[i]))))
{
if (!in_word)
{
sz[i] = scm_upcase(sz[i]);
in_word = 1;
}
else
{
sz[i] = scm_downcase(sz[i]);
}
}
else
in_word = 0;
}
return str;
}
SCM_DEFINE (scm_string_titlecase_x, "string-titlecase!", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Destructively titlecase every first character in a word in\n"
"@var{str}.")
#define FUNC_NAME s_scm_string_titlecase_x
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return string_titlecase_x (str, cstart, cend);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_titlecase, "string-titlecase", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Titlecase every first character in a word in @var{str}.")
#define FUNC_NAME s_scm_string_titlecase
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
return string_titlecase_x (scm_string_copy (str), cstart, cend);
}
#undef FUNC_NAME
/* Reverse the portion of @var{str} between str[cstart] (including)
and str[cend] excluding. */
static void
string_reverse_x (char * str, int cstart, int cend)
{
char tmp;
cend--;
while (cstart < cend)
{
tmp = str[cstart];
str[cstart] = str[cend];
str[cend] = tmp;
cstart++;
cend--;
}
}
SCM_DEFINE (scm_string_reverse, "string-reverse", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Reverse the string @var{str}. The optional arguments\n"
"@var{start} and @var{end} delimit the region of @var{str} to\n"
"operate on.")
#define FUNC_NAME s_scm_string_reverse
{
char * cstr;
int cstart;
int cend;
SCM result;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
result = scm_string_copy (str);
string_reverse_x (SCM_STRING_CHARS (result), cstart, cend);
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_reverse_x, "string-reverse!", 1, 2, 0,
(SCM str, SCM start, SCM end),
"Reverse the string @var{str} in-place. The optional arguments\n"
"@var{start} and @var{end} delimit the region of @var{str} to\n"
"operate on. The return value is unspecified.")
#define FUNC_NAME s_scm_string_reverse_x
{
char * cstr;
int cstart;
int cend;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, cstr,
2, start, cstart,
3, end, cend);
string_reverse_x (SCM_STRING_CHARS (str), cstart, cend);
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_append_shared, "string-append/shared", 0, 0, 1,
(SCM ls),
"Like @code{string-append}, but the result may share memory\n"
"with the argument strings.")
#define FUNC_NAME s_scm_string_append_shared
{
long i;
SCM_VALIDATE_REST_ARGUMENT (ls);
/* Optimize the one-argument case. */
i = scm_ilength (ls);
if (i == 1)
return SCM_CAR (ls);
else
return scm_string_append (ls);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_concatenate, "string-concatenate", 1, 0, 0,
(SCM ls),
"Append the elements of @var{ls} (which must be strings)\n"
"together into a single string. Guaranteed to return a freshly\n"
"allocated string.")
#define FUNC_NAME s_scm_string_concatenate
{
long strings = scm_ilength (ls);
SCM tmp, result;
int len = 0;
char * p;
/* Validate the string list. */
if (strings < 0)
SCM_WRONG_TYPE_ARG (1, ls);
/* Calculate the size of the result string. */
tmp = ls;
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
SCM_VALIDATE_STRING (1, elt);
len += SCM_STRING_LENGTH (elt);
tmp = SCM_CDR (tmp);
}
result = scm_allocate_string (len);
/* Copy the list elements into the result. */
p = SCM_STRING_CHARS (result);
tmp = ls;
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
memmove (p, SCM_STRING_CHARS (elt),
SCM_STRING_LENGTH (elt) * sizeof (char));
p += SCM_STRING_LENGTH (elt);
tmp = SCM_CDR (tmp);
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_concatenate_reverse, "string-concatenate-reverse", 1, 2, 0,
(SCM ls, SCM final_string, SCM end),
"Without optional arguments, this procedure is equivalent to\n"
"\n"
"@smalllisp\n"
"(string-concatenate (reverse ls))\n"
"@end smalllisp\n"
"\n"
"If the optional argument @var{final_string} is specified, it is\n"
"consed onto the beginning to @var{ls} before performing the\n"
"list-reverse and string-concatenate operations. If @var{end}\n"
"is given, only the characters of @var{final_string} up to index\n"
"@var{end} are used.\n"
"\n"
"Guaranteed to return a freshly allocated string.")
#define FUNC_NAME s_scm_string_concatenate_reverse
{
long strings;
SCM tmp, result;
int len = 0;
char * p;
int cend = 0;
/* Check the optional arguments and calculate the additional length
of the result string. */
if (!SCM_UNBNDP (final_string))
{
SCM_VALIDATE_STRING (2, final_string);
if (!SCM_UNBNDP (end))
{
SCM_VALIDATE_INUM_COPY (3, end, cend);
SCM_ASSERT_RANGE (3, end,
(cend >= 0) &&
(cend <= SCM_STRING_LENGTH (final_string)));
}
else
{
cend = SCM_STRING_LENGTH (final_string);
}
len += cend;
}
strings = scm_ilength (ls);
/* Validate the string list. */
if (strings < 0)
SCM_WRONG_TYPE_ARG (1, ls);
/* Calculate the length of the result string. */
tmp = ls;
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
SCM_VALIDATE_STRING (1, elt);
len += SCM_STRING_LENGTH (elt);
tmp = SCM_CDR (tmp);
}
result = scm_allocate_string (len);
p = SCM_STRING_CHARS (result) + len;
/* Construct the result string, possibly by using the optional final
string. */
if (!SCM_UNBNDP (final_string))
{
p -= cend;
memmove (p, SCM_STRING_CHARS (final_string), cend * sizeof (char));
}
tmp = ls;
while (!SCM_NULLP (tmp))
{
SCM elt = SCM_CAR (tmp);
p -= SCM_STRING_LENGTH (elt);
memmove (p, SCM_STRING_CHARS (elt),
SCM_STRING_LENGTH (elt) * sizeof (char));
tmp = SCM_CDR (tmp);
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_concatenate_shared, "string-concatenate/shared", 1, 0, 0,
(SCM ls),
"Like @code{string-concatenate}, but the result may share memory\n"
"with the strings in the list @var{ls}.")
#define FUNC_NAME s_scm_string_concatenate_shared
{
/* Optimize the one-string case. */
long i = scm_ilength (ls);
if (i == 1)
{
SCM_VALIDATE_STRING (1, SCM_CAR (ls));
return SCM_CAR (ls);
}
return scm_string_concatenate (ls);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_concatenate_reverse_shared, "string-concatenate-reverse/shared", 1, 2, 0,
(SCM ls, SCM final_string, SCM end),
"Like @code{string-concatenate-reverse}, but the result may\n"
"share memory with the the strings in the @var{ls} arguments.")
#define FUNC_NAME s_scm_string_concatenate_reverse_shared
{
/* Just call the non-sharing version. */
return scm_string_concatenate_reverse (ls, final_string, end);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_map, "string-map", 2, 2, 0,
(SCM proc, SCM s, SCM start, SCM end),
"@var{proc} is a char->char procedure, it is mapped over\n"
"@var{s}. The order in which the procedure is applied to the\n"
"string elements is not specified.")
#define FUNC_NAME s_scm_string_map
{
char * cstr, *p;
int cstart, cend;
SCM result;
SCM_VALIDATE_PROC (1, proc);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s, cstr,
3, start, cstart,
4, end, cend);
result = scm_allocate_string (cend - cstart);
p = SCM_STRING_CHARS (result);
while (cstart < cend)
{
SCM ch = scm_call_1 (proc, SCM_MAKE_CHAR (cstr[cstart]));
if (!SCM_CHARP (ch))
SCM_MISC_ERROR ("procedure ~S returned non-char", scm_list_1 (proc));
cstart++;
*p++ = SCM_CHAR (ch);
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_map_x, "string-map!", 2, 2, 0,
(SCM proc, SCM s, SCM start, SCM end),
"@var{proc} is a char->char procedure, it is mapped over\n"
"@var{s}. The order in which the procedure is applied to the\n"
"string elements is not specified. The string @var{s} is\n"
"modified in-place, the return value is not specified.")
#define FUNC_NAME s_scm_string_map_x
{
char * cstr, *p;
int cstart, cend;
SCM_VALIDATE_PROC (1, proc);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s, cstr,
3, start, cstart,
4, end, cend);
p = SCM_STRING_CHARS (s) + cstart;
while (cstart < cend)
{
SCM ch = scm_call_1 (proc, SCM_MAKE_CHAR (cstr[cstart]));
if (!SCM_CHARP (ch))
SCM_MISC_ERROR ("procedure ~S returned non-char", scm_list_1 (proc));
cstart++;
*p++ = SCM_CHAR (ch);
}
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_fold, "string-fold", 3, 2, 0,
(SCM kons, SCM knil, SCM s, SCM start, SCM end),
"Fold @var{kons} over the characters of @var{s}, with @var{knil}\n"
"as the terminating element, from left to right. @var{kons}\n"
"must expect two arguments: The actual character and the last\n"
"result of @var{kons}' application.")
#define FUNC_NAME s_scm_string_fold
{
char * cstr;
int cstart, cend;
SCM result;
SCM_VALIDATE_PROC (1, kons);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (3, s, cstr,
4, start, cstart,
5, end, cend);
result = knil;
while (cstart < cend)
{
result = scm_call_2 (kons, SCM_MAKE_CHAR (cstr[cstart]), result);
cstart++;
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_fold_right, "string-fold-right", 3, 2, 0,
(SCM kons, SCM knil, SCM s, SCM start, SCM end),
"Fold @var{kons} over the characters of @var{s}, with @var{knil}\n"
"as the terminating element, from right to left. @var{kons}\n"
"must expect two arguments: The actual character and the last\n"
"result of @var{kons}' application.")
#define FUNC_NAME s_scm_string_fold_right
{
char * cstr;
int cstart, cend;
SCM result;
SCM_VALIDATE_PROC (1, kons);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (3, s, cstr,
4, start, cstart,
5, end, cend);
result = knil;
while (cstart < cend)
{
result = scm_call_2 (kons, SCM_MAKE_CHAR (cstr[cend - 1]), result);
cend--;
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_unfold, "string-unfold", 4, 2, 0,
(SCM p, SCM f, SCM g, SCM seed, SCM base, SCM make_final),
"@itemize @bullet\n"
"@item @var{g} is used to generate a series of @emph{seed}\n"
"values from the initial @var{seed}: @var{seed}, (@var{g}\n"
"@var{seed}), (@var{g}^2 @var{seed}), (@var{g}^3 @var{seed}),\n"
"@dots{}\n"
"@item @var{p} tells us when to stop -- when it returns true\n"
"when applied to one of these seed values.\n"
"@item @var{f} maps each seed value to the corresponding\n"
"character in the result string. These chars are assembled\n"
"into the string in a left-to-right order.\n"
"@item @var{base} is the optional initial/leftmost portion\n"
"of the constructed string; it default to the empty\n"
"string.\n"
"@item @var{make_final} is applied to the terminal seed\n"
"value (on which @var{p} returns true) to produce\n"
"the final/rightmost portion of the constructed string.\n"
"It defaults to @code{(lambda (x) "")}.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_unfold
{
SCM res, ans;
SCM_VALIDATE_PROC (1, p);
SCM_VALIDATE_PROC (2, f);
SCM_VALIDATE_PROC (3, g);
if (!SCM_UNBNDP (base))
{
SCM_VALIDATE_STRING (5, base);
ans = base;
}
else
ans = scm_allocate_string (0);
if (!SCM_UNBNDP (make_final))
SCM_VALIDATE_PROC (6, make_final);
res = scm_call_1 (p, seed);
while (SCM_FALSEP (res))
{
SCM str;
SCM ch = scm_call_1 (f, seed);
if (!SCM_CHARP (ch))
SCM_MISC_ERROR ("procedure ~S returned non-char", scm_list_1 (f));
str = scm_allocate_string (1);
*SCM_STRING_CHARS (str) = SCM_CHAR (ch);
ans = scm_string_append (scm_list_2 (ans, str));
seed = scm_call_1 (g, seed);
res = scm_call_1 (p, seed);
}
if (!SCM_UNBNDP (make_final))
{
res = scm_call_1 (make_final, seed);
return scm_string_append (scm_list_2 (ans, res));
}
else
return ans;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_unfold_right, "string-unfold-right", 4, 2, 0,
(SCM p, SCM f, SCM g, SCM seed, SCM base, SCM make_final),
"@itemize @bullet\n"
"@item @var{g} is used to generate a series of @emph{seed}\n"
"values from the initial @var{seed}: @var{seed}, (@var{g}\n"
"@var{seed}), (@var{g}^2 @var{seed}), (@var{g}^3 @var{seed}),\n"
"@dots{}\n"
"@item @var{p} tells us when to stop -- when it returns true\n"
"when applied to one of these seed values.\n"
"@item @var{f} maps each seed value to the corresponding\n"
"character in the result string. These chars are assembled\n"
"into the string in a right-to-left order.\n"
"@item @var{base} is the optional initial/rightmost portion\n"
"of the constructed string; it default to the empty\n"
"string.\n"
"@item @var{make_final} is applied to the terminal seed\n"
"value (on which @var{p} returns true) to produce\n"
"the final/leftmost portion of the constructed string.\n"
"It defaults to @code{(lambda (x) "")}.\n"
"@end itemize")
#define FUNC_NAME s_scm_string_unfold_right
{
SCM res, ans;
SCM_VALIDATE_PROC (1, p);
SCM_VALIDATE_PROC (2, f);
SCM_VALIDATE_PROC (3, g);
if (!SCM_UNBNDP (base))
{
SCM_VALIDATE_STRING (5, base);
ans = base;
}
else
ans = scm_allocate_string (0);
if (!SCM_UNBNDP (make_final))
SCM_VALIDATE_PROC (6, make_final);
res = scm_call_1 (p, seed);
while (SCM_FALSEP (res))
{
SCM str;
SCM ch = scm_call_1 (f, seed);
if (!SCM_CHARP (ch))
SCM_MISC_ERROR ("procedure ~S returned non-char", scm_list_1 (f));
str = scm_allocate_string (1);
*SCM_STRING_CHARS (str) = SCM_CHAR (ch);
ans = scm_string_append (scm_list_2 (str, ans));
seed = scm_call_1 (g, seed);
res = scm_call_1 (p, seed);
}
if (!SCM_UNBNDP (make_final))
{
res = scm_call_1 (make_final, seed);
return scm_string_append (scm_list_2 (res, ans));
}
else
return ans;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_for_each, "string-for-each", 2, 2, 0,
(SCM proc, SCM s, SCM start, SCM end),
"@var{proc} is mapped over @var{s} in left-to-right order. The\n"
"return value is not specified.")
#define FUNC_NAME s_scm_string_for_each
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_PROC (1, proc);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s, cstr,
3, start, cstart,
4, end, cend);
while (cstart < cend)
{
scm_call_1 (proc, SCM_MAKE_CHAR (cstr[cstart]));
cstart++;
}
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_for_each_index, "string-for-each-index", 2, 2, 0,
(SCM proc, SCM s, SCM start, SCM end),
"@var{proc} is mapped over @var{s} in left-to-right order. The\n"
"return value is not specified.")
#define FUNC_NAME s_scm_string_for_each
{
char * cstr;
int cstart, cend;
SCM_VALIDATE_PROC (1, proc);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s, cstr,
3, start, cstart,
4, end, cend);
while (cstart < cend)
{
scm_call_1 (proc, SCM_MAKINUM (cstart));
cstart++;
}
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_xsubstring, "xsubstring", 2, 3, 0,
(SCM s, SCM from, SCM to, SCM start, SCM end),
"This is the @emph{extended substring} procedure that implements\n"
"replicated copying of a substring of some string.\n"
"\n"
"@var{s} is a string, @var{start} and @var{end} are optional\n"
"arguments that demarcate a substring of @var{s}, defaulting to\n"
"0 and the length of @var{s}. Replicate this substring up and\n"
"down index space, in both the positive and negative directions.\n"
"@code{xsubstring} returns the substring of this string\n"
"beginning at index @var{from}, and ending at @var{to}, which\n"
"defaults to @var{from} + (@var{end} - @var{start}).")
#define FUNC_NAME s_scm_xsubstring
{
char * cs, * p;
int cstart, cend, cfrom, cto;
SCM result;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cs,
4, start, cstart,
5, end, cend);
SCM_VALIDATE_INUM_COPY (2, from, cfrom);
SCM_VALIDATE_INUM_DEF_COPY (3, to, cfrom + (cend - cstart), cto);
if (cstart == cend && cfrom != cto)
SCM_MISC_ERROR ("start and end indices must not be equal", SCM_EOL);
result = scm_allocate_string (cto - cfrom);
p = SCM_STRING_CHARS (result);
while (cfrom < cto)
{
int t = ((cfrom < 0) ? -cfrom : cfrom) % (cend - cstart);
if (cfrom < 0)
*p = cs[(cend - cstart) - t];
else
*p = cs[t];
cfrom++;
p++;
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_xcopy_x, "string-xcopy!", 4, 3, 0,
(SCM target, SCM tstart, SCM s, SCM sfrom, SCM sto, SCM start, SCM end),
"Exactly the same as @code{xsubstring}, but the extracted text\n"
"is written into the string @var{target} starting at index\n"
"@var{tstart}. The operation is not defined if @code{(eq?\n"
"@var{target} @var{s})} or these arguments share storage -- you\n"
"cannot copy a string on top of itself.")
#define FUNC_NAME s_scm_string_xcopy_x
{
char * ctarget, * cs, * p;
int ctstart, csfrom, csto, cstart, cend;
SCM dummy = SCM_UNDEFINED;
int cdummy;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, target, ctarget,
2, tstart, ctstart,
2, dummy, cdummy);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (3, s, cs,
6, start, cstart,
7, end, cend);
SCM_VALIDATE_INUM_COPY (4, sfrom, csfrom);
SCM_VALIDATE_INUM_DEF_COPY (5, sto, csfrom + (cend - cstart), csto);
if (cstart == cend && csfrom != csto)
SCM_MISC_ERROR ("start and end indices must not be equal", SCM_EOL);
SCM_ASSERT_RANGE (1, tstart,
ctstart + (csto - csfrom) <= SCM_STRING_LENGTH (target));
p = ctarget + ctstart;
while (csfrom < csto)
{
int t = ((csfrom < 0) ? -csfrom : csfrom) % (cend - cstart);
if (csfrom < 0)
*p = cs[(cend - cstart) - t];
else
*p = cs[t];
csfrom++;
p++;
}
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_replace, "string-replace", 2, 4, 0,
(SCM s1, SCM s2, SCM start1, SCM end1, SCM start2, SCM end2),
"Return the string @var{s1}, but with the characters\n"
"@var{start1} @dots{} @var{end1} replaced by the characters\n"
"@var{start2} @dots{} @var{end2} from @var{s2}.")
#define FUNC_NAME s_scm_string_replace
{
char * cstr1, * cstr2, * p;
int cstart1, cend1, cstart2, cend2;
SCM result;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s1, cstr1,
3, start1, cstart1,
4, end1, cend1);
SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, s2, cstr2,
5, start2, cstart2,
6, end2, cend2);
result = scm_allocate_string (cstart1 + (cend2 - cstart2) +
SCM_STRING_LENGTH (s1) - cend1);
p = SCM_STRING_CHARS (result);
memmove (p, cstr1, cstart1 * sizeof (char));
memmove (p + cstart1, cstr2 + cstart2, (cend2 - cstart2) * sizeof (char));
memmove (p + cstart1 + (cend2 - cstart2),
cstr1 + cend1,
(SCM_STRING_LENGTH (s1) - cend1) * sizeof (char));
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_tokenize, "string-tokenize", 1, 3, 0,
(SCM s, SCM token_char, SCM start, SCM end),
"Split the string @var{s} into a list of substrings, where each\n"
"substring is a maximal non-empty contiguous sequence of\n"
"characters equal to the character @var{token_char}, or\n"
"whitespace, if @var{token_char} is not given. If\n"
"@var{token_char} is a character set, it is used for finding the\n"
"token borders.")
#define FUNC_NAME s_scm_string_tokenize
{
char * cstr;
int cstart, cend;
SCM result = SCM_EOL;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_UNBNDP (token_char))
{
int idx;
while (cstart < cend)
{
while (cstart < cend)
{
if (!isspace (cstr[cend - 1]))
break;
cend--;
}
if (cstart >= cend)
break;
idx = cend;
while (cstart < cend)
{
if (isspace (cstr[cend - 1]))
break;
cend--;
}
result = scm_cons (scm_mem2string (cstr + cend, idx - cend), result);
}
}
else if (SCM_CHARSETP (token_char))
{
int idx;
while (cstart < cend)
{
while (cstart < cend)
{
if (!SCM_CHARSET_GET (token_char, cstr[cend - 1]))
break;
cend--;
}
if (cstart >= cend)
break;
idx = cend;
while (cstart < cend)
{
if (SCM_CHARSET_GET (token_char, cstr[cend - 1]))
break;
cend--;
}
result = scm_cons (scm_mem2string (cstr + cend, idx - cend), result);
}
}
else
{
int idx;
char chr;
SCM_VALIDATE_CHAR (2, token_char);
chr = SCM_CHAR (token_char);
while (cstart < cend)
{
while (cstart < cend)
{
if (cstr[cend - 1] != chr)
break;
cend--;
}
if (cstart >= cend)
break;
idx = cend;
while (cstart < cend)
{
if (cstr[cend - 1] == chr)
break;
cend--;
}
result = scm_cons (scm_mem2string (cstr + cend, idx - cend), result);
}
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_filter, "string-filter", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Filter the string @var{s}, retaining only those characters that\n"
"satisfy the @var{char_pred} argument. If the argument is a\n"
"procedure, it is applied to each character as a predicate, if\n"
"it is a character, it is tested for equality and if it is a\n"
"character set, it is tested for membership.")
#define FUNC_NAME s_scm_string_filter
{
char * cstr;
int cstart, cend;
SCM result;
int idx;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
SCM ls = SCM_EOL;
char chr;
chr = SCM_CHAR (char_pred);
idx = cstart;
while (idx < cend)
{
if (cstr[idx] == chr)
ls = scm_cons (SCM_MAKE_CHAR (cstr[idx]), ls);
idx++;
}
result = scm_reverse_list_to_string (ls);
}
else if (SCM_CHARSETP (char_pred))
{
SCM ls = SCM_EOL;
idx = cstart;
while (idx < cend)
{
if (SCM_CHARSET_GET (char_pred, cstr[idx]))
ls = scm_cons (SCM_MAKE_CHAR (cstr[idx]), ls);
idx++;
}
result = scm_reverse_list_to_string (ls);
}
else
{
SCM ls = SCM_EOL;
SCM_VALIDATE_PROC (2, char_pred);
idx = cstart;
while (idx < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[idx]));
if (!SCM_FALSEP (res))
ls = scm_cons (SCM_MAKE_CHAR (cstr[idx]), ls);
idx++;
}
result = scm_reverse_list_to_string (ls);
}
return result;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_delete, "string-delete", 2, 2, 0,
(SCM s, SCM char_pred, SCM start, SCM end),
"Filter the string @var{s}, retaining only those characters that\n"
"do not satisfy the @var{char_pred} argument. If the argument\n"
"is a procedure, it is applied to each character as a predicate,\n"
"if it is a character, it is tested for equality and if it is a\n"
"character set, it is tested for membership.")
#define FUNC_NAME s_scm_string_delete
{
char * cstr;
int cstart, cend;
SCM result;
int idx;
SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, s, cstr,
3, start, cstart,
4, end, cend);
if (SCM_CHARP (char_pred))
{
SCM ls = SCM_EOL;
char chr;
chr = SCM_CHAR (char_pred);
idx = cstart;
while (idx < cend)
{
if (cstr[idx] != chr)
ls = scm_cons (SCM_MAKE_CHAR (cstr[idx]), ls);
idx++;
}
result = scm_reverse_list_to_string (ls);
}
else if (SCM_CHARSETP (char_pred))
{
SCM ls = SCM_EOL;
idx = cstart;
while (idx < cend)
{
if (!SCM_CHARSET_GET (char_pred, cstr[idx]))
ls = scm_cons (SCM_MAKE_CHAR (cstr[idx]), ls);
idx++;
}
result = scm_reverse_list_to_string (ls);
}
else
{
SCM ls = SCM_EOL;
SCM_VALIDATE_PROC (2, char_pred);
idx = cstart;
while (idx < cend)
{
SCM res;
res = scm_call_1 (char_pred, SCM_MAKE_CHAR (cstr[idx]));
if (SCM_FALSEP (res))
ls = scm_cons (SCM_MAKE_CHAR (cstr[idx]), ls);
idx++;
}
result = scm_reverse_list_to_string (ls);
}
return result;
}
#undef FUNC_NAME
/* Initialize the SRFI-13 module. This function will be called by the
loading Scheme module. */
void
scm_init_srfi_13 (void)
{
/* We initialize the SRFI-14 module here, because the string
primitives need the charset smob type created by that module. */
scm_c_init_srfi_14 ();
/* Install the string primitives. */
#ifndef SCM_MAGIC_SNARFER
#include "srfi/srfi-13.x"
#endif
}
/* End of srfi-13.c. */
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