1 /* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
3 * Copyright (c) 1991, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
21 str->str_pok = 0; /* invalidate pointer */
22 str->str_nok = 1; /* validate number */
33 GROWSTR(&(str->str_ptr), &(str->str_len), 24);
36 sprintf(s,"%.20g",str->str_nval);
40 str->str_cur = s - str->str_ptr;
44 fprintf(stderr,"0x%lx ptr(%s)\n",str,str->str_ptr);
55 if (str->str_len && str->str_pok)
56 str->str_nval = atof(str->str_ptr);
62 fprintf(stderr,"0x%lx num(%g)\n",str,str->str_nval);
73 else if (sstr->str_nok)
74 str_numset(dstr,sstr->str_nval);
75 else if (sstr->str_pok)
76 str_nset(dstr,sstr->str_ptr,sstr->str_cur);
86 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
87 bcopy(ptr,str->str_ptr,len);
89 *(str->str_ptr+str->str_cur) = '\0';
90 str->str_nok = 0; /* invalidate number */
91 str->str_pok = 1; /* validate pointer */
103 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
104 bcopy(ptr,str->str_ptr,len+1);
106 str->str_nok = 0; /* invalidate number */
107 str->str_pok = 1; /* validate pointer */
110 str_chop(str,ptr) /* like set but assuming ptr is in str */
116 str->str_cur -= (ptr - str->str_ptr);
117 bcopy(ptr,str->str_ptr, str->str_cur + 1);
118 str->str_nok = 0; /* invalidate number */
119 str->str_pok = 1; /* validate pointer */
122 str_ncat(str,ptr,len)
129 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
130 bcopy(ptr,str->str_ptr+str->str_cur,len);
132 *(str->str_ptr+str->str_cur) = '\0';
133 str->str_nok = 0; /* invalidate number */
134 str->str_pok = 1; /* validate pointer */
141 if (!(sstr->str_pok))
144 str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
158 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
159 bcopy(ptr,str->str_ptr+str->str_cur,len+1);
161 str->str_nok = 0; /* invalidate number */
162 str->str_pok = 1; /* validate pointer */
166 str_append_till(str,from,delim,keeplist)
178 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
179 str->str_nok = 0; /* invalidate number */
180 str->str_pok = 1; /* validate pointer */
181 to = str->str_ptr+str->str_cur;
182 for (; *from; from++,to++) {
183 if (*from == '\\' && from[1] && delim != '\\') {
185 if (from[1] == delim || from[1] == '\\')
190 else if (strchr(keeplist,from[1]))
195 else if (*from == delim)
200 str->str_cur = to - str->str_ptr;
212 freestrroot = str->str_link.str_next;
215 str = (STR *) safemalloc(sizeof(STR));
216 bzero((char*)str,sizeof(STR));
219 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
229 GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
232 /* make str point to what nstr did */
235 str_replace(str,nstr)
239 safefree(str->str_ptr);
240 str->str_ptr = nstr->str_ptr;
241 str->str_len = nstr->str_len;
242 str->str_cur = nstr->str_cur;
243 str->str_pok = nstr->str_pok;
244 if (str->str_nok = nstr->str_nok)
245 str->str_nval = nstr->str_nval;
246 safefree((char*)nstr);
256 str->str_ptr[0] = '\0';
260 str->str_link.str_next = freestrroot;
282 #ifdef USE_STD_STDIO /* Here is some breathtakingly efficient cheating */
284 register char *bp; /* we're going to steal some values */
285 register int cnt; /* from the stdio struct and put EVERYTHING */
286 register STDCHAR *ptr; /* in the innermost loop into registers */
287 register char newline = '\n'; /* (assuming at least 6 registers) */
291 cnt = fp->_cnt; /* get count into register */
292 str->str_nok = 0; /* invalidate number */
293 str->str_pok = 1; /* validate pointer */
294 if (str->str_len <= cnt) /* make sure we have the room */
295 GROWSTR(&(str->str_ptr), &(str->str_len), cnt+1);
296 bp = str->str_ptr; /* move these two too to registers */
300 if ((*bp++ = *ptr++) == newline)
301 if (bp <= str->str_ptr || bp[-2] != '\\')
302 goto thats_all_folks;
309 fp->_cnt = cnt; /* deregisterize cnt and ptr */
311 i = _filbuf(fp); /* get more characters */
313 ptr = fp->_ptr; /* reregisterize cnt and ptr */
315 bpx = bp - str->str_ptr; /* prepare for possible relocation */
316 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + cnt + 1);
317 bp = str->str_ptr + bpx; /* reconstitute our pointer */
319 if (i == newline) { /* all done for now? */
321 goto thats_all_folks;
323 else if (i == EOF) /* all done for ever? */
324 goto thats_all_folks;
325 *bp++ = i; /* now go back to screaming loop */
329 fp->_cnt = cnt; /* put these back or we're in trouble */
332 str->str_cur = bp - str->str_ptr; /* set length */
334 #else /* !USE_STD_STDIO */ /* The big, slow, and stupid way */
336 static char buf[4192];
338 if (fgets(buf, sizeof buf, fp) != Nullch)
343 #endif /* USE_STD_STDIO */
345 return str->str_cur ? str->str_ptr : Nullch;
357 str->str_nval += 1.0;
366 for (d = str->str_ptr; *d && *d != '.'; d++) ;
368 if (!isdigit(*str->str_ptr) || !isdigit(*d) ) {
369 str_numset(str,atof(str->str_ptr) + 1.0); /* punt */
372 while (d >= str->str_ptr) {
377 /* oh,oh, the number grew */
378 GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + 2);
380 for (d = str->str_ptr + str->str_cur; d > str->str_ptr; d--)
394 str->str_nval -= 1.0;
399 str->str_nval = -1.0;
403 for (d = str->str_ptr; *d && *d != '.'; d++) ;
405 if (!isdigit(*str->str_ptr) || !isdigit(*d) || (*d == '0' && d == str->str_ptr)) {
406 str_numset(str,atof(str->str_ptr) - 1.0); /* punt */
409 while (d >= str->str_ptr) {
416 /* make a string that will exist for the duration of the expression eval */
422 register STR *str = str_new(0);
423 static long tmps_size = -1;
425 str_sset(str,oldstr);
426 if (++tmps_max > tmps_size) {
427 tmps_size = tmps_max;
428 if (!(tmps_size & 127)) {
430 tmps_list = (STR**)saferealloc((char*)tmps_list,
431 (tmps_size + 128) * sizeof(STR*) );
433 tmps_list = (STR**)safemalloc(128 * sizeof(char*));
436 tmps_list[tmps_max] = str;
444 register STR *str = str_new(0);
454 register STR *str = str_new(0);