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9a8351bc15
strop.c: Use SCM_VALIDATE_ICHR, SCM_VALIDATE_ICHR_COPY instead of SCM_VALIDATE_CHAR, SCM_VALIDATE_CHAR_COPY. Change made for consistency with the other macros dealing with immediate characters. (Similar to INT -> INUM change a week or so ago).
369 lines
9.9 KiB
C
369 lines
9.9 KiB
C
/* classes: src_files */
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/* Copyright (C) 1994, 1996, 1997, 1999 Free Software Foundation, Inc.
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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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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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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 the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA */
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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 "strop.h"
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#include "read.h" /*For SCM_CASE_INSENSITIVE_P*/
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/* implements index if direction > 0 otherwise rindex. */
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static int
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scm_i_index (SCM *str, SCM chr, int direction, SCM sub_start,
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SCM sub_end, const char *why)
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{
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unsigned char * p;
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int x;
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int lower;
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int upper;
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int ch;
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SCM_ASSERT (SCM_ROSTRINGP (*str), *str, SCM_ARG1, why);
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SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG2, why);
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if (sub_start == SCM_BOOL_F)
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sub_start = SCM_MAKINUM (0);
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SCM_ASSERT (SCM_INUMP (sub_start), sub_start, SCM_ARG3, why);
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lower = SCM_INUM (sub_start);
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if (lower < 0
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|| lower > SCM_ROLENGTH (*str))
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scm_out_of_range (why, sub_start);
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if (sub_end == SCM_BOOL_F)
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sub_end = SCM_MAKINUM (SCM_ROLENGTH (*str));
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SCM_ASSERT (SCM_INUMP (sub_end), sub_end, SCM_ARG4, why);
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upper = SCM_INUM (sub_end);
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if (upper < SCM_INUM (sub_start)
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|| upper > SCM_ROLENGTH (*str))
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scm_out_of_range (why, sub_end);
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if (direction > 0)
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{
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p = (unsigned char *)SCM_ROCHARS (*str) + lower;
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ch = SCM_ICHR (chr);
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for (x = SCM_INUM (sub_start); x < upper; ++x, ++p)
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if (*p == ch)
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return x;
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}
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else
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{
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p = upper - 1 + (unsigned char *)SCM_ROCHARS (*str);
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ch = SCM_ICHR (chr);
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for (x = upper - 1; x >= lower; --x, --p)
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if (*p == ch)
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return x;
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}
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return -1;
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}
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SCM_DEFINE (scm_string_index, "string-index", 2, 2, 0,
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(SCM str, SCM chr, SCM frm, SCM to),
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"Return the index of the first occurrence of @var{chr} in @var{str}. The
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optional integer arguments @var{frm} and @var{to} limit the search to
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a portion of the string. This procedure essentially implements the
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@code{index} or @code{strchr} functions from the C library.")
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#define FUNC_NAME s_scm_string_index
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{
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int pos;
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if (frm == SCM_UNDEFINED)
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frm = SCM_BOOL_F;
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if (to == SCM_UNDEFINED)
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to = SCM_BOOL_F;
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pos = scm_i_index (&str, chr, 1, frm, to, FUNC_NAME);
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return (pos < 0
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? SCM_BOOL_F
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: SCM_MAKINUM (pos));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_rindex, "string-rindex", 2, 2, 0,
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(SCM str, SCM chr, SCM frm, SCM to),
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"Like @code{string-index}, but search from the right of the string rather
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than from the left. This procedure essentially implements the
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@code{rindex} or @code{strrchr} functions from the C library.")
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#define FUNC_NAME s_scm_string_rindex
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{
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int pos;
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if (frm == SCM_UNDEFINED)
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frm = SCM_BOOL_F;
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if (to == SCM_UNDEFINED)
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to = SCM_BOOL_F;
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pos = scm_i_index (&str, chr, -1, frm, to, FUNC_NAME);
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return (pos < 0
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? SCM_BOOL_F
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: SCM_MAKINUM (pos));
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}
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#undef FUNC_NAME
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SCM_REGISTER_PROC(s_substring_move_left_x, "substring-move-left!", 5, 0, 0, scm_substring_move_x);
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SCM_REGISTER_PROC(s_substring_move_right_x, "substring-move-right!", 5, 0, 0, scm_substring_move_x);
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SCM_DEFINE (scm_substring_move_x, "substring-move!", 5, 0, 0,
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(SCM str1, SCM start1, SCM end1, SCM str2, SCM start2),
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"Copy the substring of @var{str1} bounded by @var{start1} and @var{end1}
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into @var{str2} beginning at position @var{end2}.
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@code{substring-move-right!} begins copying from the rightmost character
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and moves left, and @code{substring-move-left!} copies from the leftmost
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character moving right.
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It is useful to have two functions that copy in different directions so
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that substrings can be copied back and forth within a single string. If
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you wish to copy text from the left-hand side of a string to the
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right-hand side of the same string, and the source and destination
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overlap, you must be careful to copy the rightmost characters of the
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text first, to avoid clobbering your data. Hence, when @var{str1} and
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@var{str2} are the same string, you should use
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@code{substring-move-right!} when moving text from left to right, and
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@code{substring-move-left!} otherwise. If @code{str1} and @samp{str2}
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are different strings, it does not matter which function you use.")
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#define FUNC_NAME s_scm_substring_move_x
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{
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long s1, s2, e, len;
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SCM_VALIDATE_STRING (1,str1);
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SCM_VALIDATE_INUM_COPY (2,start1,s1);
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SCM_VALIDATE_INUM_COPY (3,end1,e);
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SCM_VALIDATE_STRING (4,str2);
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SCM_VALIDATE_INUM_COPY (5,start2,s2);
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len = e - s1;
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SCM_ASSERT_RANGE (3,end1,len >= 0);
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SCM_ASSERT_RANGE (2,start1,s1 <= SCM_LENGTH (str1) && s1 >= 0);
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SCM_ASSERT_RANGE (5,start2,s2 <= SCM_LENGTH (str2) && s2 >= 0);
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SCM_ASSERT_RANGE (3,end1,e <= SCM_LENGTH (str1) && e >= 0);
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SCM_ASSERT_RANGE (5,start2,len+s2 <= SCM_LENGTH (str2));
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SCM_SYSCALL(memmove((void *)(&(SCM_CHARS(str2)[s2])),
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(void *)(&(SCM_CHARS(str1)[s1])),
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len));
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return scm_return_first(SCM_UNSPECIFIED, str1, str2);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_substring_fill_x, "substring-fill!", 4, 0, 0,
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(SCM str, SCM start, SCM end, SCM fill),
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"Change every character in @var{str} between @var{start} and @var{end} to
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@var{fill-char}.")
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#define FUNC_NAME s_scm_substring_fill_x
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{
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long i, e;
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char c;
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SCM_VALIDATE_STRING (1,str);
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SCM_VALIDATE_INUM_COPY (2,start,i);
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SCM_VALIDATE_INUM_COPY (3,end,e);
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SCM_VALIDATE_ICHR_COPY (4,fill,c);
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SCM_ASSERT_RANGE (2,start,i <= SCM_LENGTH (str) && i >= 0);
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SCM_ASSERT_RANGE (3,end,e <= SCM_LENGTH (str) && e >= 0);
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while (i<e) SCM_CHARS (str)[i++] = c;
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_null_p, "string-null?", 1, 0, 0,
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(SCM str),
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"Return @code{#t} if @var{str}'s length is nonzero, and @code{#f}
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otherwise.")
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#define FUNC_NAME s_scm_string_null_p
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{
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SCM_VALIDATE_ROSTRING (1,str);
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return SCM_NEGATE_BOOL(SCM_ROLENGTH (str));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_to_list, "string->list", 1, 0, 0,
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(SCM str),
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"")
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#define FUNC_NAME s_scm_string_to_list
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{
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long i;
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SCM res = SCM_EOL;
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unsigned char *src;
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SCM_VALIDATE_ROSTRING (1,str);
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src = SCM_ROUCHARS (str);
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for (i = SCM_ROLENGTH (str)-1;i >= 0;i--) res = scm_cons ((SCM)SCM_MAKICHR (src[i]), res);
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return res;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_copy, "string-copy", 1, 0, 0,
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(SCM str),
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"")
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#define FUNC_NAME s_scm_string_copy
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{
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SCM_VALIDATE_STRINGORSUBSTR (1,str);
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return scm_makfromstr (SCM_ROCHARS (str), (scm_sizet)SCM_ROLENGTH (str), 0);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_fill_x, "string-fill!", 2, 0, 0,
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(SCM str, SCM chr),
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"")
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#define FUNC_NAME s_scm_string_fill_x
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{
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register char *dst, c;
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register long k;
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SCM_VALIDATE_STRING_COPY (1,str,dst);
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SCM_VALIDATE_ICHR_COPY (2,chr,c);
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for (k = SCM_LENGTH (str)-1;k >= 0;k--) dst[k] = c;
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_upcase_x, "string-upcase!", 1, 0, 0,
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(SCM v),
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"@deffnx primitive string-downcase! str
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Upcase or downcase every character in @code{str}, respectively.")
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#define FUNC_NAME s_scm_string_upcase_x
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{
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register long k;
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register unsigned char *cs;
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SCM_ASRTGO (SCM_NIMP (v), badarg1);
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k = SCM_LENGTH (v);
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switch SCM_TYP7
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(v)
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{
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case scm_tc7_string:
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cs = SCM_UCHARS (v);
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while (k--)
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cs[k] = scm_upcase(cs[k]);
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break;
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default:
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badarg1:SCM_WTA (1,v);
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}
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return v;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_upcase, "string-upcase", 1, 0, 0,
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(SCM str),
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"")
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#define FUNC_NAME s_scm_string_upcase
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{
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return scm_string_upcase_x(scm_string_copy(str));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_downcase_x, "string-downcase!", 1, 0, 0,
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(SCM v),
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"")
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#define FUNC_NAME s_scm_string_downcase_x
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{
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register long k;
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register unsigned char *cs;
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SCM_ASRTGO (SCM_NIMP (v), badarg1);
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k = SCM_LENGTH (v);
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switch (SCM_TYP7(v))
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{
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case scm_tc7_string:
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cs = SCM_UCHARS (v);
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while (k--)
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cs[k] = scm_downcase(cs[k]);
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break;
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default:
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badarg1:SCM_WTA (1,v);
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}
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return v;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_downcase, "string-downcase", 1, 0, 0,
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(SCM str),
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"")
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#define FUNC_NAME s_scm_string_downcase
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{
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SCM_VALIDATE_STRING (1,str);
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return scm_string_downcase_x(scm_string_copy(str));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_capitalize_x, "string-capitalize!", 1, 0, 0,
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(SCM s),
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"")
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#define FUNC_NAME s_scm_string_capitalize_x
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{
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char *str;
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int i, len, in_word=0;
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SCM_VALIDATE_STRING (1,s);
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len = SCM_LENGTH(s);
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str = SCM_CHARS(s);
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for(i=0; i<len; i++) {
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if(SCM_NFALSEP(scm_char_alphabetic_p(SCM_MAKICHR(str[i])))) {
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if(!in_word) {
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str[i] = scm_upcase(str[i]);
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in_word = 1;
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} else {
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str[i] = scm_downcase(str[i]);
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}
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}
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else in_word = 0;
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}
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return s;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_capitalize, "string-capitalize", 1, 0, 0,
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(SCM s),
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"")
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#define FUNC_NAME s_scm_string_capitalize
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{
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SCM_VALIDATE_STRING (1,s);
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return scm_string_capitalize_x(scm_string_copy(s));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_string_ci_to_symbol, "string-ci->symbol", 1, 0, 0,
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(SCM str),
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"")
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#define FUNC_NAME s_scm_string_ci_to_symbol
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{
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return scm_string_to_symbol (SCM_CASE_INSENSITIVE_P
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? scm_string_downcase(str)
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: str);
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}
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#undef FUNC_NAME
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void
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scm_init_strop ()
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{
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#include "strop.x"
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}
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