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/* classes: src_files */
/* Copyright (C) 1994,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include "libguile/_scm.h"
#include "libguile/chars.h"
#include "libguile/strings.h"
#include "libguile/validate.h"
#include "libguile/strop.h"
#include "libguile/read.h" /*For SCM_CASE_INSENSITIVE_P*/
#ifdef HAVE_STRING_H
#include <string.h>
#endif
/*
xSCM_DEFINE (scm_i_index, "i-index", 2, 2, 0,
(SCM str, SCM chr, SCM frm, SCM to),
"@deftypefn {Internal C Function} {static int} scm_i_index (SCM *@var{str},\n"
"SCM @var{chr}, int @var{direction}, SCM @var{sub_start}, SCM @var{sub_end}, char *@var{why})
"This is a workhorse function that performs either an @code{index} or\n"
"@code{rindex} function, depending on the value of @var{direction}."
*/
/* implements index if direction > 0 otherwise rindex. */
static long
scm_i_index (SCM *str, SCM chr, int direction, SCM sub_start,
SCM sub_end, const char *why)
{
unsigned char * p;
long x;
long lower;
long upper;
int ch;
SCM_ASSERT (SCM_STRINGP (*str), *str, SCM_ARG1, why);
SCM_ASSERT (SCM_CHARP (chr), chr, SCM_ARG2, why);
if (scm_is_false (sub_start))
sub_start = SCM_I_MAKINUM (0);
SCM_ASSERT (SCM_INUMP (sub_start), sub_start, SCM_ARG3, why);
lower = SCM_INUM (sub_start);
if (lower < 0 || lower > SCM_STRING_LENGTH (*str))
scm_out_of_range (why, sub_start);
if (scm_is_false (sub_end))
sub_end = SCM_I_MAKINUM (SCM_STRING_LENGTH (*str));
SCM_ASSERT (SCM_INUMP (sub_end), sub_end, SCM_ARG4, why);
upper = SCM_INUM (sub_end);
if (upper < SCM_INUM (sub_start) || upper > SCM_STRING_LENGTH (*str))
scm_out_of_range (why, sub_end);
if (direction > 0)
{
p = SCM_STRING_UCHARS (*str) + lower;
ch = SCM_CHAR (chr);
for (x = SCM_INUM (sub_start); x < upper; ++x, ++p)
if (*p == ch)
return x;
}
else
{
p = upper - 1 + SCM_STRING_UCHARS (*str);
ch = SCM_CHAR (chr);
for (x = upper - 1; x >= lower; --x, --p)
if (*p == ch)
return x;
}
return -1;
}
SCM_DEFINE (scm_string_index, "string-index", 2, 2, 0,
(SCM str, SCM chr, SCM frm, SCM to),
"Return the index of the first occurrence of @var{chr} in\n"
"@var{str}. The optional integer arguments @var{frm} and\n"
"@var{to} limit the search to a portion of the string. This\n"
"procedure essentially implements the @code{index} or\n"
"@code{strchr} functions from the C library.\n"
"\n"
"@lisp\n"
"(string-index \"weiner\" #\\e)\n"
"@result{} 1\n\n"
"(string-index \"weiner\" #\\e 2)\n"
"@result{} 4\n\n"
"(string-index \"weiner\" #\\e 2 4)\n"
"@result{} #f\n"
"@end lisp")
#define FUNC_NAME s_scm_string_index
{
long pos;
if (SCM_UNBNDP (frm))
frm = SCM_BOOL_F;
if (SCM_UNBNDP (to))
to = SCM_BOOL_F;
pos = scm_i_index (&str, chr, 1, frm, to, FUNC_NAME);
return (pos < 0
? SCM_BOOL_F
: SCM_I_MAKINUM (pos));
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_rindex, "string-rindex", 2, 2, 0,
(SCM str, SCM chr, SCM frm, SCM to),
"Like @code{string-index}, but search from the right of the\n"
"string rather than from the left. This procedure essentially\n"
"implements the @code{rindex} or @code{strrchr} functions from\n"
"the C library.\n"
"\n"
"@lisp\n"
"(string-rindex \"weiner\" #\\e)\n"
"@result{} 4\n\n"
"(string-rindex \"weiner\" #\\e 2 4)\n"
"@result{} #f\n\n"
"(string-rindex \"weiner\" #\\e 2 5)\n"
"@result{} 4\n"
"@end lisp")
#define FUNC_NAME s_scm_string_rindex
{
long pos;
if (SCM_UNBNDP (frm))
frm = SCM_BOOL_F;
if (SCM_UNBNDP (to))
to = SCM_BOOL_F;
pos = scm_i_index (&str, chr, -1, frm, to, FUNC_NAME);
return (pos < 0
? SCM_BOOL_F
: SCM_I_MAKINUM (pos));
}
#undef FUNC_NAME
SCM_DEFINE (scm_substring_move_x, "substring-move!", 5, 0, 0,
(SCM str1, SCM start1, SCM end1, SCM str2, SCM start2),
"Copy the substring of @var{str1} bounded by @var{start1} and @var{end1}\n"
"into @var{str2} beginning at position @var{start2}.\n"
"@var{str1} and @var{str2} can be the same string.")
#define FUNC_NAME s_scm_substring_move_x
{
long s1, s2, e, len;
SCM_VALIDATE_STRING (1, str1);
SCM_VALIDATE_INUM_COPY (2, start1, s1);
SCM_VALIDATE_INUM_COPY (3, end1, e);
SCM_VALIDATE_STRING (4, str2);
SCM_VALIDATE_INUM_COPY (5, start2, s2);
len = e - s1;
SCM_ASSERT_RANGE (3, end1, len >= 0);
SCM_ASSERT_RANGE (2, start1, s1 <= SCM_STRING_LENGTH (str1) && s1 >= 0);
SCM_ASSERT_RANGE (5, start2, s2 <= SCM_STRING_LENGTH (str2) && s2 >= 0);
SCM_ASSERT_RANGE (3, end1, e <= SCM_STRING_LENGTH (str1) && e >= 0);
SCM_ASSERT_RANGE (5, start2, len+s2 <= SCM_STRING_LENGTH (str2));
SCM_SYSCALL(memmove((void *)(&(SCM_STRING_CHARS(str2)[s2])),
(void *)(&(SCM_STRING_CHARS(str1)[s1])),
len));
return scm_return_first(SCM_UNSPECIFIED, str1, str2);
}
#undef FUNC_NAME
SCM_DEFINE (scm_substring_fill_x, "substring-fill!", 4, 0, 0,
(SCM str, SCM start, SCM end, SCM fill),
"Change every character in @var{str} between @var{start} and\n"
"@var{end} to @var{fill}.\n"
"\n"
"@lisp\n"
"(define y \"abcdefg\")\n"
"(substring-fill! y 1 3 #\\r)\n"
"y\n"
"@result{} \"arrdefg\"\n"
"@end lisp")
#define FUNC_NAME s_scm_substring_fill_x
{
long i, e;
char c;
SCM_VALIDATE_STRING (1, str);
SCM_VALIDATE_INUM_COPY (2, start, i);
SCM_VALIDATE_INUM_COPY (3, end, e);
SCM_VALIDATE_CHAR_COPY (4, fill, c);
SCM_ASSERT_RANGE (2, start, i <= SCM_STRING_LENGTH (str) && i >= 0);
SCM_ASSERT_RANGE (3, end, e <= SCM_STRING_LENGTH (str) && e >= 0);
while (i<e) SCM_STRING_CHARS (str)[i++] = c;
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_null_p, "string-null?", 1, 0, 0,
(SCM str),
"Return @code{#t} if @var{str}'s length is zero, and\n"
"@code{#f} otherwise.\n"
"@lisp\n"
"(string-null? \"\") @result{} #t\n"
"y @result{} \"foo\"\n"
"(string-null? y) @result{} #f\n"
"@end lisp")
#define FUNC_NAME s_scm_string_null_p
{
SCM_VALIDATE_STRING (1, str);
return scm_from_bool (SCM_STRING_LENGTH (str) == 0);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_to_list, "string->list", 1, 0, 0,
(SCM str),
"Return a newly allocated list of the characters that make up\n"
"the given string @var{str}. @code{string->list} and\n"
"@code{list->string} are inverses as far as @samp{equal?} is\n"
"concerned.")
#define FUNC_NAME s_scm_string_to_list
{
long i;
SCM res = SCM_EOL;
unsigned char *src;
SCM_VALIDATE_STRING (1, str);
src = SCM_STRING_UCHARS (str);
for (i = SCM_STRING_LENGTH (str)-1;i >= 0;i--) res = scm_cons (SCM_MAKE_CHAR (src[i]), res);
return res;
}
#undef FUNC_NAME
/* Helper function for the string copy and string conversion functions.
* No argument checking is performed. */
static SCM
string_copy (SCM str)
{
const char* chars = SCM_STRING_CHARS (str);
size_t length = SCM_STRING_LENGTH (str);
SCM new_string = scm_mem2string (chars, length);
scm_remember_upto_here_1 (str);
return new_string;
}
SCM_DEFINE (scm_string_copy, "string-copy", 1, 0, 0,
(SCM str),
"Return a newly allocated copy of the given @var{string}.")
#define FUNC_NAME s_scm_string_copy
{
SCM_VALIDATE_STRING (1, str);
return string_copy (str);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_fill_x, "string-fill!", 2, 0, 0,
(SCM str, SCM chr),
"Store @var{char} in every element of the given @var{string} and\n"
"return an unspecified value.")
#define FUNC_NAME s_scm_string_fill_x
{
register char *dst, c;
register long k;
SCM_VALIDATE_STRING_COPY (1, str, dst);
SCM_VALIDATE_CHAR_COPY (2, chr, c);
for (k = SCM_STRING_LENGTH (str)-1;k >= 0;k--) dst[k] = c;
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
/* Helper function for the string uppercase conversion functions.
* No argument checking is performed. */
static SCM
string_upcase_x (SCM v)
{
unsigned long k;
for (k = 0; k < SCM_STRING_LENGTH (v); ++k)
SCM_STRING_UCHARS (v) [k] = scm_c_upcase (SCM_STRING_UCHARS (v) [k]);
return v;
}
SCM_DEFINE (scm_string_upcase_x, "string-upcase!", 1, 0, 0,
(SCM str),
"Destructively upcase every character in @var{str} and return\n"
"@var{str}.\n"
"@lisp\n"
"y @result{} \"arrdefg\"\n"
"(string-upcase! y) @result{} \"ARRDEFG\"\n"
"y @result{} \"ARRDEFG\"\n"
"@end lisp")
#define FUNC_NAME s_scm_string_upcase_x
{
SCM_VALIDATE_STRING (1, str);
return string_upcase_x (str);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_upcase, "string-upcase", 1, 0, 0,
(SCM str),
"Return a freshly allocated string containing the characters of\n"
"@var{str} in upper case.")
#define FUNC_NAME s_scm_string_upcase
{
SCM_VALIDATE_STRING (1, str);
return string_upcase_x (string_copy (str));
}
#undef FUNC_NAME
/* Helper function for the string lowercase conversion functions.
* No argument checking is performed. */
static SCM
string_downcase_x (SCM v)
{
unsigned long k;
for (k = 0; k < SCM_STRING_LENGTH (v); ++k)
SCM_STRING_UCHARS (v) [k] = scm_c_downcase (SCM_STRING_UCHARS (v) [k]);
return v;
}
SCM_DEFINE (scm_string_downcase_x, "string-downcase!", 1, 0, 0,
(SCM str),
"Destructively downcase every character in @var{str} and return\n"
"@var{str}.\n"
"@lisp\n"
"y @result{} \"ARRDEFG\"\n"
"(string-downcase! y) @result{} \"arrdefg\"\n"
"y @result{} \"arrdefg\"\n"
"@end lisp")
#define FUNC_NAME s_scm_string_downcase_x
{
SCM_VALIDATE_STRING (1, str);
return string_downcase_x (str);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_downcase, "string-downcase", 1, 0, 0,
(SCM str),
"Return a freshly allocation string containing the characters in\n"
"@var{str} in lower case.")
#define FUNC_NAME s_scm_string_downcase
{
SCM_VALIDATE_STRING (1, str);
return string_downcase_x (string_copy (str));
}
#undef FUNC_NAME
/* Helper function for the string capitalization functions.
* No argument checking is performed. */
static SCM
string_capitalize_x (SCM str)
{
unsigned char *sz;
long i, len;
int in_word=0;
len = SCM_STRING_LENGTH(str);
sz = SCM_STRING_UCHARS (str);
for(i=0; i<len; i++) {
if (scm_is_true (scm_char_alphabetic_p (SCM_MAKE_CHAR (sz[i])))) {
if(!in_word) {
sz[i] = scm_c_upcase(sz[i]);
in_word = 1;
} else {
sz[i] = scm_c_downcase(sz[i]);
}
}
else in_word = 0;
}
return str;
}
SCM_DEFINE (scm_string_capitalize_x, "string-capitalize!", 1, 0, 0,
(SCM str),
"Upcase the first character of every word in @var{str}\n"
"destructively and return @var{str}.\n"
"\n"
"@lisp\n"
"y @result{} \"hello world\"\n"
"(string-capitalize! y) @result{} \"Hello World\"\n"
"y @result{} \"Hello World\"\n"
"@end lisp")
#define FUNC_NAME s_scm_string_capitalize_x
{
SCM_VALIDATE_STRING (1, str);
return string_capitalize_x (str);
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_capitalize, "string-capitalize", 1, 0, 0,
(SCM str),
"Return a freshly allocated string with the characters in\n"
"@var{str}, where the first character of every word is\n"
"capitalized.")
#define FUNC_NAME s_scm_string_capitalize
{
SCM_VALIDATE_STRING (1, str);
return string_capitalize_x (string_copy (str));
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_split, "string-split", 2, 0, 0,
(SCM str, SCM chr),
"Split the string @var{str} into the a list of the substrings delimited\n"
"by appearances of the character @var{chr}. Note that an empty substring\n"
"between separator characters will result in an empty string in the\n"
"result list.\n"
"\n"
"@lisp\n"
"(string-split \"root:x:0:0:root:/root:/bin/bash\" #\\:)\n"
"@result{}\n"
"(\"root\" \"x\" \"0\" \"0\" \"root\" \"/root\" \"/bin/bash\")\n"
"\n"
"(string-split \"::\" #\\:)\n"
"@result{}\n"
"(\"\" \"\" \"\")\n"
"\n"
"(string-split \"\" #\\:)\n"
"@result{}\n"
"(\"\")\n"
"@end lisp")
#define FUNC_NAME s_scm_string_split
{
long idx, last_idx;
char * p;
int ch;
SCM res = SCM_EOL;
SCM_VALIDATE_STRING (1, str);
SCM_VALIDATE_CHAR (2, chr);
idx = SCM_STRING_LENGTH (str);
p = SCM_STRING_CHARS (str);
ch = SCM_CHAR (chr);
while (idx >= 0)
{
last_idx = idx;
while (idx > 0 && p[idx - 1] != ch)
idx--;
if (idx >= 0)
{
res = scm_cons (scm_mem2string (p + idx, last_idx - idx), res);
idx--;
}
}
scm_remember_upto_here_1 (str);
return res;
}
#undef FUNC_NAME
SCM_DEFINE (scm_string_ci_to_symbol, "string-ci->symbol", 1, 0, 0,
(SCM str),
"Return the symbol whose name is @var{str}. @var{str} is\n"
"converted to lowercase before the conversion is done, if Guile\n"
"is currently reading symbols case-insensitively.")
#define FUNC_NAME s_scm_string_ci_to_symbol
{
return scm_string_to_symbol (SCM_CASE_INSENSITIVE_P
? scm_string_downcase(str)
: str);
}
#undef FUNC_NAME
void
scm_init_strop ()
{
#include "libguile/strop.x"
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
|