libguile/strop.c

   1 /* classes: src_files */
   2
   3 /*      Copyright (C) 1994, 1996, 1997, 1999 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 (len >= 0, end1, SCM_OUTOFRANGE, s_substring_move_x);
 142   SCM_ASSERT (s1 <= SCM_LENGTH (str1) && s1 >= 0, start1,
 143               SCM_OUTOFRANGE, s_substring_move_x);
 144   SCM_ASSERT (s2 <= SCM_LENGTH (str2) && s2 >= 0, start2,
 145               SCM_OUTOFRANGE, s_substring_move_x);
 146   SCM_ASSERT (e <= SCM_LENGTH (str1) && e >= 0, end1,
 147               SCM_OUTOFRANGE, s_substring_move_x);
 148   SCM_ASSERT (len+s2 <= SCM_LENGTH (str2), start2,
 149               SCM_OUTOFRANGE, s_substring_move_x);
 150
 151   SCM_SYSCALL(memmove((void *)(&(SCM_CHARS(str2)[s2])),
 152                       (void *)(&(SCM_CHARS(str1)[s1])),
 153                       len));
 154
 155   return scm_return_first(SCM_UNSPECIFIED, str1, str2);
 156 }
 157
 158
 159 SCM_PROC(s_substring_fill_x, "substring-fill!", 4, 0, 0, scm_substring_fill_x);
 160
 161 SCM
 162 scm_substring_fill_x (SCM str, SCM start, SCM end, SCM fill)
 163
 164 {
 165   long i, e;
 166   char c;
 167   SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_substring_fill_x);
 168   SCM_ASSERT (SCM_INUMP (start), start, SCM_ARG2, s_substring_fill_x);
 169   SCM_ASSERT (SCM_INUMP (end), end, SCM_ARG3, s_substring_fill_x);
 170   SCM_ASSERT (SCM_ICHRP (fill), fill, SCM_ARG4, s_substring_fill_x);
 171   i = SCM_INUM (start), e = SCM_INUM (end);c = SCM_ICHR (fill);
 172   SCM_ASSERT (i <= SCM_LENGTH (str) && i >= 0, start,
 173               SCM_OUTOFRANGE, s_substring_fill_x);
 174   SCM_ASSERT (e <= SCM_LENGTH (str) && e >= 0, end,
 175               SCM_OUTOFRANGE, s_substring_fill_x);
 176   while (i<e) SCM_CHARS (str)[i++] = c;
 177   return SCM_UNSPECIFIED;
 178 }
 179
 180
 181 SCM_PROC(s_string_null_p, "string-null?", 1, 0, 0, scm_string_null_p);
 182
 183 SCM
 184 scm_string_null_p (str)
 185      SCM str;
 186 {
 187   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_string_null_p);
 188   return (SCM_ROLENGTH (str)
 189           ? SCM_BOOL_F
 190           : SCM_BOOL_T);
 191 }
 192
 193
 194 SCM_PROC(s_string_to_list, "string->list", 1, 0, 0, scm_string_to_list);
 195
 196 SCM
 197 scm_string_to_list (str)
 198      SCM str;
 199 {
 200   long i;
 201   SCM res = SCM_EOL;
 202   unsigned char *src;
 203   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_string_to_list);
 204   src = SCM_ROUCHARS (str);
 205   for (i = SCM_ROLENGTH (str)-1;i >= 0;i--) res = scm_cons ((SCM)SCM_MAKICHR (src[i]), res);
 206   return res;
 207 }
 208
 209
 210
 211 SCM_PROC(s_string_copy, "string-copy", 1, 0, 0, scm_string_copy);
 212
 213 SCM
 214 scm_string_copy (str)
 215      SCM str;
 216 {
 217   SCM_ASSERT (SCM_NIMP (str) && (SCM_STRINGP (str) || SCM_SUBSTRP (str)),
 218               str, SCM_ARG1, s_string_copy);
 219   return scm_makfromstr (SCM_ROCHARS (str), (scm_sizet)SCM_ROLENGTH (str), 0);
 220 }
 221
 222
 223 SCM_PROC(s_string_fill_x, "string-fill!", 2, 0, 0, scm_string_fill_x);
 224
 225 SCM
 226 scm_string_fill_x (str, chr)
 227      SCM str;
 228      SCM chr;
 229 {
 230   register char *dst, c;
 231   register long k;
 232   SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_string_fill_x);
 233   SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG2, s_string_fill_x);
 234   c = SCM_ICHR (chr);
 235   dst = SCM_CHARS (str);
 236   for (k = SCM_LENGTH (str)-1;k >= 0;k--) dst[k] = c;
 237   return SCM_UNSPECIFIED;
 238 }
 239
 240 SCM_PROC(s_string_upcase_x, "string-upcase!", 1, 0, 0, scm_string_upcase_x);
 241
 242 SCM
 243 scm_string_upcase_x (v)
 244      SCM v;
 245 {
 246   register long k;
 247   register unsigned char *cs;
 248   SCM_ASRTGO (SCM_NIMP (v), badarg1);
 249   k = SCM_LENGTH (v);
 250   switch SCM_TYP7
 251     (v)
 252     {
 253     case scm_tc7_string:
 254       cs = SCM_UCHARS (v);
 255       while (k--)
 256         cs[k] = scm_upcase(cs[k]);
 257       break;
 258     default:
 259     badarg1:scm_wta (v, (char *) SCM_ARG1, s_string_upcase_x);
 260     }
 261   return v;
 262 }
 263
 264 SCM_PROC(s_string_upcase, "string-upcase", 1, 0, 0, scm_string_upcase);
 265
 266 SCM
 267 scm_string_upcase(SCM str)
 268 {
 269   return scm_string_upcase_x(scm_string_copy(str));
 270 }
 271
 272 SCM_PROC(s_string_downcase_x, "string-downcase!", 1, 0, 0, scm_string_downcase_x);
 273
 274 SCM
 275 scm_string_downcase_x (v)
 276      SCM v;
 277 {
 278   register long k;
 279   register unsigned char *cs;
 280   SCM_ASRTGO (SCM_NIMP (v), badarg1);
 281   k = SCM_LENGTH (v);
 282   switch (SCM_TYP7(v))
 283     {
 284       case scm_tc7_string:
 285         cs = SCM_UCHARS (v);
 286         while (k--)
 287           cs[k] = scm_downcase(cs[k]);
 288         break;
 289       default:
 290     badarg1:scm_wta (v, (char *) SCM_ARG1, s_string_downcase_x);
 291     }
 292   return v;
 293 }
 294
 295 SCM_PROC(s_string_downcase, "string-downcase", 1, 0, 0, scm_string_downcase);
 296
 297 SCM
 298 scm_string_downcase(SCM str)
 299 {
 300   SCM_ASSERT(SCM_NIMP(str) && SCM_STRINGP(str), str, SCM_ARG1, s_string_downcase);
 301   return scm_string_downcase_x(scm_string_copy(str));
 302 }
 303
 304 SCM_PROC(s_string_capitalize_x, "string-capitalize!", 1, 0, 0, scm_string_capitalize_x);
 305
 306 SCM
 307 scm_string_capitalize_x (SCM s)
 308 {
 309   char *str;
 310   int i, len, in_word=0;
 311   SCM_ASSERT(SCM_NIMP(s) && SCM_STRINGP(s), s, SCM_ARG1, s_string_capitalize_x);
 312   len = SCM_LENGTH(s);
 313   str = SCM_CHARS(s);
 314   for(i=0; i<len;  i++) {
 315     if(SCM_NFALSEP(scm_char_alphabetic_p(SCM_MAKICHR(str[i])))) {
 316       if(!in_word) {
 317         str[i] = scm_upcase(str[i]);
 318         in_word = 1;
 319       } else {
 320         str[i] = scm_downcase(str[i]);
 321       }
 322     }
 323     else in_word = 0;
 324   }
 325   return s;
 326 }
 327
 328 SCM_PROC(s_string_capitalize, "string-capitalize", 1, 0, 0, scm_string_capitalize);
 329
 330 SCM
 331 scm_string_capitalize(SCM s)
 332 {
 333   SCM_ASSERT((SCM_NIMP(s)) && (SCM_STRINGP(s)), s, SCM_ARG1, s_string_capitalize);
 334   return scm_string_capitalize_x(scm_string_copy(s));
 335 }
 336
 337 SCM_PROC(s_string_ci_to_symbol, "string-ci->symbol", 1, 0, 0, scm_string_ci_to_symbol);
 338
 339 SCM
 340 scm_string_ci_to_symbol(SCM str)
 341 {
 342   return scm_string_to_symbol (SCM_CASE_INSENSITIVE_P
 343                                ? scm_string_downcase(str)
 344                                : str);
 345 }
 346
 347 void
 348 scm_init_strop ()
 349 {
 350 #include "strop.x"
 351 }
 352