libguile/strop.c

   1 /* classes: src_files */
   2
   3 /*      Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this software; see the file COPYING.  If not, write to the
  17 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18 02111-1307 USA */
  19
  20 \f
  21
  22 #include <stdio.h>
  23 #include "_scm.h"
  24 #include "chars.h"
  25
  26 #include "strop.h"
  27 #include "read.h" /*For SCM_CASE_INSENSITIVE_P*/
  28 \f
  29
  30
  31 /* implements index if direction > 0 otherwise rindex.  */
  32 static int
  33 scm_i_index (SCM *str, SCM chr, int direction, SCM sub_start,
  34              SCM sub_end, const char *why)
  35
  36 {
  37   unsigned char * p;
  38   int x;
  39   int lower;
  40   int upper;
  41   int ch;
  42
  43   SCM_ASSERT (SCM_NIMP (*str) && SCM_ROSTRINGP (*str), *str, SCM_ARG1, why);
  44   SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG2, why);
  45
  46   if (sub_start == SCM_BOOL_F)
  47     sub_start = SCM_MAKINUM (0);
  48
  49   SCM_ASSERT (SCM_INUMP (sub_start), sub_start, SCM_ARG3, why);
  50   lower = SCM_INUM (sub_start);
  51   if (lower < 0
  52       || lower > SCM_ROLENGTH (*str))
  53     scm_out_of_range (why, sub_start);
  54
  55   if (sub_end == SCM_BOOL_F)
  56     sub_end = SCM_MAKINUM (SCM_ROLENGTH (*str));
  57
  58   SCM_ASSERT (SCM_INUMP (sub_end), sub_end, SCM_ARG4, why);
  59   upper = SCM_INUM (sub_end);
  60   if (upper < SCM_INUM (sub_start)
  61       || upper > SCM_ROLENGTH (*str))
  62     scm_out_of_range (why, sub_end);
  63
  64   if (direction > 0)
  65     {
  66       p = (unsigned char *)SCM_ROCHARS (*str) + lower;
  67       ch = SCM_ICHR (chr);
  68
  69       for (x = SCM_INUM (sub_start); x < upper; ++x, ++p)
  70         if (*p == ch)
  71           return x;
  72     }
  73   else
  74     {
  75       p = upper - 1 + (unsigned char *)SCM_ROCHARS (*str);
  76       ch = SCM_ICHR (chr);
  77       for (x = upper - 1; x >= lower; --x, --p)
  78         if (*p == ch)
  79           return x;
  80     }
  81
  82   return -1;
  83 }
  84
  85 SCM_PROC(s_string_index, "string-index", 2, 2, 0, scm_string_index);
  86
  87 SCM
  88 scm_string_index (SCM str, SCM chr, SCM frm, SCM to)
  89 {
  90   int pos;
  91
  92   if (frm == SCM_UNDEFINED)
  93     frm = SCM_BOOL_F;
  94   if (to == SCM_UNDEFINED)
  95     to = SCM_BOOL_F;
  96   pos = scm_i_index (&str, chr, 1, frm, to, s_string_index);
  97   return (pos < 0
  98           ? SCM_BOOL_F
  99           : SCM_MAKINUM (pos));
 100 }
 101
 102 SCM_PROC(s_string_rindex, "string-rindex", 2, 2, 0, scm_string_rindex);
 103
 104 SCM
 105 scm_string_rindex (SCM str, SCM chr, SCM frm, SCM to)
 106 {
 107   int pos;
 108
 109   if (frm == SCM_UNDEFINED)
 110     frm = SCM_BOOL_F;
 111   if (to == SCM_UNDEFINED)
 112     to = SCM_BOOL_F;
 113   pos = scm_i_index (&str, chr, -1, frm, to, s_string_rindex);
 114   return (pos < 0
 115           ? SCM_BOOL_F
 116           : SCM_MAKINUM (pos));
 117 }
 118
 119
 120 SCM_PROC(s_substring_move_left_x, "substring-move-left!", 5, 0, 0, scm_substring_move_x);
 121 SCM_PROC(s_substring_move_right_x, "substring-move-right!", 5, 0, 0, scm_substring_move_x);
 122 SCM_PROC(s_substring_move_x, "substring-move!", 5, 0, 0, scm_substring_move_x);
 123
 124 SCM
 125 scm_substring_move_x (SCM str1, SCM start1, SCM end1,
 126                       SCM str2, SCM start2)
 127
 128 {
 129   long s1, s2, e, len;
 130
 131   SCM_ASSERT (SCM_NIMP (str1) && SCM_STRINGP (str1), str1,
 132               SCM_ARG1, s_substring_move_x);
 133   SCM_ASSERT (SCM_INUMP (start1), start1, SCM_ARG2, s_substring_move_x);
 134   SCM_ASSERT (SCM_INUMP (end1), end1, SCM_ARG3, s_substring_move_x);
 135   SCM_ASSERT (SCM_NIMP (str2) && SCM_STRINGP (str2), str2,
 136               SCM_ARG4, s_substring_move_x);
 137   SCM_ASSERT (SCM_INUMP (start2), start2, SCM_ARG5, s_substring_move_x);
 138
 139   s1 = SCM_INUM (start1), s2 = SCM_INUM (start2), e = SCM_INUM (end1);
 140   len = e - s1;
 141   SCM_ASSERT (s1 <= SCM_LENGTH (str1) && s1 >= 0, start1,
 142               SCM_OUTOFRANGE, s_substring_move_x);
 143   SCM_ASSERT (s2 <= SCM_LENGTH (str2) && s2 >= 0, start2,
 144               SCM_OUTOFRANGE, s_substring_move_x);
 145   SCM_ASSERT (e <= SCM_LENGTH (str1) && e >= 0, end1,
 146               SCM_OUTOFRANGE, s_substring_move_x);
 147   SCM_ASSERT (len+s2 <= SCM_LENGTH (str2), start2,
 148               SCM_OUTOFRANGE, s_substring_move_x);
 149
 150   SCM_SYSCALL(memmove((void *)(&(SCM_CHARS(str2)[s2])),
 151                       (void *)(&(SCM_CHARS(str1)[s1])),
 152                       len));
 153
 154   return scm_return_first(SCM_UNSPECIFIED, str1, str2);
 155 }
 156
 157
 158 SCM_PROC(s_substring_fill_x, "substring-fill!", 4, 0, 0, scm_substring_fill_x);
 159
 160 SCM
 161 scm_substring_fill_x (SCM str, SCM start, SCM end, SCM fill)
 162
 163 {
 164   long i, e;
 165   char c;
 166   SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_substring_fill_x);
 167   SCM_ASSERT (SCM_INUMP (start), start, SCM_ARG2, s_substring_fill_x);
 168   SCM_ASSERT (SCM_INUMP (end), end, SCM_ARG3, s_substring_fill_x);
 169   SCM_ASSERT (SCM_ICHRP (fill), fill, SCM_ARG4, s_substring_fill_x);
 170   i = SCM_INUM (start), e = SCM_INUM (end);c = SCM_ICHR (fill);
 171   SCM_ASSERT (i <= SCM_LENGTH (str) && i >= 0, start,
 172               SCM_OUTOFRANGE, s_substring_fill_x);
 173   SCM_ASSERT (e <= SCM_LENGTH (str) && e >= 0, end,
 174               SCM_OUTOFRANGE, s_substring_fill_x);
 175   while (i<e) SCM_CHARS (str)[i++] = c;
 176   return SCM_UNSPECIFIED;
 177 }
 178
 179
 180 SCM_PROC(s_string_null_p, "string-null?", 1, 0, 0, scm_string_null_p);
 181
 182 SCM
 183 scm_string_null_p (str)
 184      SCM str;
 185 {
 186   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_string_null_p);
 187   return (SCM_ROLENGTH (str)
 188           ? SCM_BOOL_F
 189           : SCM_BOOL_T);
 190 }
 191
 192
 193 SCM_PROC(s_string_to_list, "string->list", 1, 0, 0, scm_string_to_list);
 194
 195 SCM
 196 scm_string_to_list (str)
 197      SCM str;
 198 {
 199   long i;
 200   SCM res = SCM_EOL;
 201   unsigned char *src;
 202   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_string_to_list);
 203   src = SCM_ROUCHARS (str);
 204   for (i = SCM_ROLENGTH (str)-1;i >= 0;i--) res = scm_cons ((SCM)SCM_MAKICHR (src[i]), res);
 205   return res;
 206 }
 207
 208
 209
 210 SCM_PROC(s_string_copy, "string-copy", 1, 0, 0, scm_string_copy);
 211
 212 SCM
 213 scm_string_copy (str)
 214      SCM str;
 215 {
 216   SCM_ASSERT (SCM_NIMP (str) && (SCM_STRINGP (str) || SCM_SUBSTRP (str)),
 217               str, SCM_ARG1, s_string_copy);
 218   return scm_makfromstr (SCM_ROCHARS (str), (scm_sizet)SCM_ROLENGTH (str), 0);
 219 }
 220
 221
 222 SCM_PROC(s_string_fill_x, "string-fill!", 2, 0, 0, scm_string_fill_x);
 223
 224 SCM
 225 scm_string_fill_x (str, chr)
 226      SCM str;
 227      SCM chr;
 228 {
 229   register char *dst, c;
 230   register long k;
 231   SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_string_fill_x);
 232   SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG2, s_string_fill_x);
 233   c = SCM_ICHR (chr);
 234   dst = SCM_CHARS (str);
 235   for (k = SCM_LENGTH (str)-1;k >= 0;k--) dst[k] = c;
 236   return SCM_UNSPECIFIED;
 237 }
 238
 239 SCM_PROC(s_string_upcase_x, "string-upcase!", 1, 0, 0, scm_string_upcase_x);
 240
 241 SCM
 242 scm_string_upcase_x (v)
 243      SCM v;
 244 {
 245   register long k;
 246   register unsigned char *cs;
 247   SCM_ASRTGO (SCM_NIMP (v), badarg1);
 248   k = SCM_LENGTH (v);
 249   switch SCM_TYP7
 250     (v)
 251     {
 252     case scm_tc7_string:
 253       cs = SCM_UCHARS (v);
 254       while (k--)
 255         cs[k] = scm_upcase(cs[k]);
 256       break;
 257     default:
 258     badarg1:scm_wta (v, (char *) SCM_ARG1, s_string_upcase_x);
 259     }
 260   return v;
 261 }
 262
 263 SCM_PROC(s_string_upcase, "string-upcase", 1, 0, 0, scm_string_upcase);
 264
 265 SCM
 266 scm_string_upcase(SCM str)
 267 {
 268   return scm_string_upcase_x(scm_string_copy(str));
 269 }
 270
 271 SCM_PROC(s_string_downcase_x, "string-downcase!", 1, 0, 0, scm_string_downcase_x);
 272
 273 SCM
 274 scm_string_downcase_x (v)
 275      SCM v;
 276 {
 277   register long k;
 278   register unsigned char *cs;
 279   SCM_ASRTGO (SCM_NIMP (v), badarg1);
 280   k = SCM_LENGTH (v);
 281   switch (SCM_TYP7(v))
 282     {
 283       case scm_tc7_string:
 284         cs = SCM_UCHARS (v);
 285         while (k--)
 286           cs[k] = scm_downcase(cs[k]);
 287         break;
 288       default:
 289     badarg1:scm_wta (v, (char *) SCM_ARG1, s_string_downcase_x);
 290     }
 291   return v;
 292 }
 293
 294 SCM_PROC(s_string_downcase, "string-downcase", 1, 0, 0, scm_string_downcase);
 295
 296 SCM
 297 scm_string_downcase(SCM str)
 298 {
 299   SCM_ASSERT(SCM_NIMP(str) && SCM_STRINGP(str), str, SCM_ARG1, s_string_downcase);
 300   return scm_string_downcase_x(scm_string_copy(str));
 301 }
 302
 303 SCM_PROC(s_string_capitalize_x, "string-capitalize!", 1, 0, 0, scm_string_capitalize_x);
 304
 305 SCM
 306 scm_string_capitalize_x (SCM s)
 307 {
 308   char *str;
 309   int i, len, in_word=0;
 310   SCM_ASSERT(SCM_NIMP(s) && SCM_STRINGP(s), s, SCM_ARG1, s_string_capitalize_x);
 311   len = SCM_LENGTH(s);
 312   str = SCM_CHARS(s);
 313   for(i=0; i<len;  i++) {
 314     if(SCM_NFALSEP(scm_char_alphabetic_p(SCM_MAKICHR(str[i])))) {
 315       if(!in_word) {
 316         str[i] = scm_upcase(str[i]);
 317         in_word = 1;
 318       } else {
 319         str[i] = scm_downcase(str[i]);
 320       }
 321     }
 322     else in_word = 0;
 323   }
 324   return s;
 325 }
 326
 327 SCM_PROC(s_string_capitalize, "string-capitalize", 1, 0, 0, scm_string_capitalize);
 328
 329 SCM
 330 scm_string_capitalize(SCM s)
 331 {
 332   SCM_ASSERT((SCM_NIMP(s)) && (SCM_STRINGP(s)), s, SCM_ARG1, s_string_capitalize);
 333   return scm_string_capitalize_x(scm_string_copy(s));
 334 }
 335
 336 SCM_PROC(s_string_ci_to_symbol, "string-ci->symbol", 1, 0, 0, scm_string_ci_to_symbol);
 337
 338 SCM
 339 scm_string_ci_to_symbol(SCM str)
 340 {
 341   return scm_string_to_symbol (SCM_CASE_INSENSITIVE_P
 342                                ? scm_string_downcase(str)
 343                                : str);
 344 }
 345
 346 void
 347 scm_init_strop ()
 348 {
 349 #include "strop.x"
 350 }
 351