1 /* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
4 * 2001, 2002, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
17 str_numset(register STR *str, double num)
20 str->str_pok = 0; /* invalidate pointer */
21 str->str_nok = 1; /* validate number */
25 str_2ptr(register STR *str)
31 GROWSTR(&(str->str_ptr), &(str->str_len), 24);
34 sprintf(s,"%.20g",str->str_nval);
38 str->str_cur = s - str->str_ptr;
42 fprintf(stderr,"0x%lx ptr(%s)\n",(unsigned long)str,str->str_ptr);
48 str_2num(register STR *str)
52 if (str->str_len && str->str_pok)
53 str->str_nval = atof(str->str_ptr);
59 fprintf(stderr,"0x%lx num(%g)\n",(unsigned long)str,str->str_nval);
65 str_sset(STR *dstr, register STR *sstr)
69 else if (sstr->str_nok)
70 str_numset(dstr,sstr->str_nval);
71 else if (sstr->str_pok)
72 str_nset(dstr,sstr->str_ptr,sstr->str_cur);
78 str_nset(register STR *str, register char *ptr, register int len)
80 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
81 memcpy(str->str_ptr,ptr,len);
83 *(str->str_ptr+str->str_cur) = '\0';
84 str->str_nok = 0; /* invalidate number */
85 str->str_pok = 1; /* validate pointer */
89 str_set(register STR *str, register char *ptr)
96 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
97 memcpy(str->str_ptr,ptr,len+1);
99 str->str_nok = 0; /* invalidate number */
100 str->str_pok = 1; /* validate pointer */
104 str_chop(register STR *str, register char *ptr) /* like set but assuming ptr is in str */
110 str->str_cur -= (ptr - str->str_ptr);
111 memcpy(str->str_ptr, ptr, str->str_cur + 1);
112 str->str_nok = 0; /* invalidate number */
113 str->str_pok = 1; /* validate pointer */
117 str_ncat(register STR *str, register char *ptr, register int len)
121 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
122 memcpy(str->str_ptr+str->str_cur, ptr, len);
124 *(str->str_ptr+str->str_cur) = '\0';
125 str->str_nok = 0; /* invalidate number */
126 str->str_pok = 1; /* validate pointer */
130 str_scat(STR *dstr, register STR *sstr)
132 if (!(sstr->str_pok))
135 str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
139 str_cat(register STR *str, register char *ptr)
148 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
149 memcpy(str->str_ptr+str->str_cur, ptr, len+1);
151 str->str_nok = 0; /* invalidate number */
152 str->str_pok = 1; /* validate pointer */
156 str_append_till(register STR *str, register char *from, register int delim, char *keeplist)
164 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
165 str->str_nok = 0; /* invalidate number */
166 str->str_pok = 1; /* validate pointer */
167 to = str->str_ptr+str->str_cur;
168 for (; *from; from++,to++) {
169 if (*from == '\\' && from[1] && delim != '\\') {
171 if (from[1] == delim || from[1] == '\\')
176 else if (strchr(keeplist,from[1]))
181 else if (*from == delim)
186 str->str_cur = to - str->str_ptr;
197 freestrroot = str->str_link.str_next;
200 str = (STR *) safemalloc(sizeof(STR));
201 memset((char*)str,0,sizeof(STR));
204 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
209 str_grow(register STR *str, int len)
212 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
215 /* make str point to what nstr did */
218 str_replace(register STR *str, register STR *nstr)
220 safefree(str->str_ptr);
221 str->str_ptr = nstr->str_ptr;
222 str->str_len = nstr->str_len;
223 str->str_cur = nstr->str_cur;
224 str->str_pok = nstr->str_pok;
225 if ((str->str_nok = nstr->str_nok))
226 str->str_nval = nstr->str_nval;
227 safefree((char*)nstr);
231 str_free(register STR *str)
236 str->str_ptr[0] = '\0';
240 str->str_link.str_next = freestrroot;
245 str_len(register STR *str)
258 str_gets(register STR *str, register FILE *fp)
260 #if defined(USE_STDIO_PTR) && defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
261 /* Here is some breathtakingly efficient cheating */
263 register char *bp; /* we're going to steal some values */
264 register int cnt; /* from the stdio struct and put EVERYTHING */
265 register STDCHAR *ptr; /* in the innermost loop into registers */
266 register char newline = '\n'; /* (assuming at least 6 registers) */
271 /* An ungetc()d char is handled separately from the regular
272 * buffer, so we getc() it back out and stuff it in the buffer.
275 if (i == EOF) return Nullch;
276 *(--((*fp)->_ptr)) = (unsigned char) i;
280 cnt = FILE_cnt(fp); /* get count into register */
281 str->str_nok = 0; /* invalidate number */
282 str->str_pok = 1; /* validate pointer */
283 if (str->str_len <= cnt) /* make sure we have the room */
284 GROWSTR(&(str->str_ptr), &(str->str_len), cnt+1);
285 bp = str->str_ptr; /* move these two too to registers */
286 ptr = (STDCHAR*)FILE_ptr(fp);
289 if ((*bp++ = *ptr++) == newline) {
290 if (bp <= str->str_ptr || bp[-2] != '\\')
291 goto thats_all_folks;
299 FILE_cnt(fp) = cnt; /* deregisterize cnt and ptr */
300 FILE_ptr(fp) = (void*)ptr; /* LHS STDCHAR* cast non-portable */
301 i = getc(fp); /* get more characters */
303 ptr = (STDCHAR*)FILE_ptr(fp); /* reregisterize cnt and ptr */
305 bpx = bp - str->str_ptr; /* prepare for possible relocation */
306 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + cnt + 1);
307 bp = str->str_ptr + bpx; /* reconstitute our pointer */
309 if (i == newline) { /* all done for now? */
311 goto thats_all_folks;
313 else if (i == EOF) /* all done for ever? */
314 goto thats_all_folks;
315 *bp++ = i; /* now go back to screaming loop */
319 FILE_cnt(fp) = cnt; /* put these back or we're in trouble */
320 FILE_ptr(fp) = (void*)ptr; /* LHS STDCHAR* cast non-portable */
322 str->str_cur = bp - str->str_ptr; /* set length */
324 #else /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
325 /* The big, slow, and stupid way */
327 static char buf[4192];
329 if (fgets(buf, sizeof buf, fp) != Nullch)
334 #endif /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
336 return str->str_cur ? str->str_ptr : Nullch;
340 str_inc(register STR *str)
347 str->str_nval += 1.0;
356 for (d = str->str_ptr; *d && *d != '.'; d++) ;
358 if (!isDIGIT(*str->str_ptr) || !isDIGIT(*d) ) {
359 str_numset(str,atof(str->str_ptr) + 1.0); /* punt */
362 while (d >= str->str_ptr) {
367 /* oh,oh, the number grew */
368 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + 2);
370 for (d = str->str_ptr + str->str_cur; d > str->str_ptr; d--)
376 str_dec(register STR *str)
383 str->str_nval -= 1.0;
388 str->str_nval = -1.0;
392 for (d = str->str_ptr; *d && *d != '.'; d++) ;
394 if (!isDIGIT(*str->str_ptr) || !isDIGIT(*d) || (*d == '0' && d == str->str_ptr)) {
395 str_numset(str,atof(str->str_ptr) - 1.0); /* punt */
398 while (d >= str->str_ptr) {
405 /* make a string that will exist for the duration of the expression eval */
408 str_mortal(STR *oldstr)
410 register STR *str = str_new(0);
411 static long tmps_size = -1;
413 str_sset(str,oldstr);
414 if (++tmps_max > tmps_size) {
415 tmps_size = tmps_max;
416 if (!(tmps_size & 127)) {
418 tmps_list = (STR**)saferealloc((char*)tmps_list,
419 (tmps_size + 128) * sizeof(STR*) );
421 tmps_list = (STR**)safemalloc(128 * sizeof(char*));
424 tmps_list[tmps_max] = str;
431 register STR *str = str_new(0);
440 register STR *str = str_new(0);