443 lines
9.8 KiB
C
443 lines
9.8 KiB
C
/* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
|
|
*
|
|
* Copyright (c) 1991-2001, Larry Wall
|
|
*
|
|
* You may distribute under the terms of either the GNU General Public
|
|
* License or the Artistic License, as specified in the README file.
|
|
*
|
|
* $Log: str.c,v $
|
|
*/
|
|
|
|
#include "EXTERN.h"
|
|
#include "a2p.h"
|
|
#include "util.h"
|
|
|
|
void
|
|
str_numset(register STR *str, double num)
|
|
{
|
|
str->str_nval = num;
|
|
str->str_pok = 0; /* invalidate pointer */
|
|
str->str_nok = 1; /* validate number */
|
|
}
|
|
|
|
char *
|
|
str_2ptr(register STR *str)
|
|
{
|
|
register char *s;
|
|
|
|
if (!str)
|
|
return "";
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), 24);
|
|
s = str->str_ptr;
|
|
if (str->str_nok) {
|
|
sprintf(s,"%.20g",str->str_nval);
|
|
while (*s) s++;
|
|
}
|
|
*s = '\0';
|
|
str->str_cur = s - str->str_ptr;
|
|
str->str_pok = 1;
|
|
#ifdef DEBUGGING
|
|
if (debug & 32)
|
|
fprintf(stderr,"0x%lx ptr(%s)\n",(unsigned long)str,str->str_ptr);
|
|
#endif
|
|
return str->str_ptr;
|
|
}
|
|
|
|
double
|
|
str_2num(register STR *str)
|
|
{
|
|
if (!str)
|
|
return 0.0;
|
|
if (str->str_len && str->str_pok)
|
|
str->str_nval = atof(str->str_ptr);
|
|
else
|
|
str->str_nval = 0.0;
|
|
str->str_nok = 1;
|
|
#ifdef DEBUGGING
|
|
if (debug & 32)
|
|
fprintf(stderr,"0x%lx num(%g)\n",(unsigned long)str,str->str_nval);
|
|
#endif
|
|
return str->str_nval;
|
|
}
|
|
|
|
void
|
|
str_sset(STR *dstr, register STR *sstr)
|
|
{
|
|
if (!sstr)
|
|
str_nset(dstr,No,0);
|
|
else if (sstr->str_nok)
|
|
str_numset(dstr,sstr->str_nval);
|
|
else if (sstr->str_pok)
|
|
str_nset(dstr,sstr->str_ptr,sstr->str_cur);
|
|
else
|
|
str_nset(dstr,"",0);
|
|
}
|
|
|
|
void
|
|
str_nset(register STR *str, register char *ptr, register int len)
|
|
{
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
|
|
bcopy(ptr,str->str_ptr,len);
|
|
str->str_cur = len;
|
|
*(str->str_ptr+str->str_cur) = '\0';
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
}
|
|
|
|
void
|
|
str_set(register STR *str, register char *ptr)
|
|
{
|
|
register int len;
|
|
|
|
if (!ptr)
|
|
ptr = "";
|
|
len = strlen(ptr);
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
|
|
bcopy(ptr,str->str_ptr,len+1);
|
|
str->str_cur = len;
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
}
|
|
|
|
void
|
|
str_chop(register STR *str, register char *ptr) /* like set but assuming ptr is in str */
|
|
|
|
|
|
{
|
|
if (!(str->str_pok))
|
|
str_2ptr(str);
|
|
str->str_cur -= (ptr - str->str_ptr);
|
|
bcopy(ptr,str->str_ptr, str->str_cur + 1);
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
}
|
|
|
|
void
|
|
str_ncat(register STR *str, register char *ptr, register int len)
|
|
{
|
|
if (!(str->str_pok))
|
|
str_2ptr(str);
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
|
|
bcopy(ptr,str->str_ptr+str->str_cur,len);
|
|
str->str_cur += len;
|
|
*(str->str_ptr+str->str_cur) = '\0';
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
}
|
|
|
|
void
|
|
str_scat(STR *dstr, register STR *sstr)
|
|
{
|
|
if (!(sstr->str_pok))
|
|
str_2ptr(sstr);
|
|
if (sstr)
|
|
str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
|
|
}
|
|
|
|
void
|
|
str_cat(register STR *str, register char *ptr)
|
|
{
|
|
register int len;
|
|
|
|
if (!ptr)
|
|
return;
|
|
if (!(str->str_pok))
|
|
str_2ptr(str);
|
|
len = strlen(ptr);
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
|
|
bcopy(ptr,str->str_ptr+str->str_cur,len+1);
|
|
str->str_cur += len;
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
}
|
|
|
|
char *
|
|
str_append_till(register STR *str, register char *from, register int delim, char *keeplist)
|
|
{
|
|
register char *to;
|
|
register int len;
|
|
|
|
if (!from)
|
|
return Nullch;
|
|
len = strlen(from);
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
to = str->str_ptr+str->str_cur;
|
|
for (; *from; from++,to++) {
|
|
if (*from == '\\' && from[1] && delim != '\\') {
|
|
if (!keeplist) {
|
|
if (from[1] == delim || from[1] == '\\')
|
|
from++;
|
|
else
|
|
*to++ = *from++;
|
|
}
|
|
else if (strchr(keeplist,from[1]))
|
|
*to++ = *from++;
|
|
else
|
|
from++;
|
|
}
|
|
else if (*from == delim)
|
|
break;
|
|
*to = *from;
|
|
}
|
|
*to = '\0';
|
|
str->str_cur = to - str->str_ptr;
|
|
return from;
|
|
}
|
|
|
|
STR *
|
|
str_new(int len)
|
|
{
|
|
register STR *str;
|
|
|
|
if (freestrroot) {
|
|
str = freestrroot;
|
|
freestrroot = str->str_link.str_next;
|
|
}
|
|
else {
|
|
str = (STR *) safemalloc(sizeof(STR));
|
|
bzero((char*)str,sizeof(STR));
|
|
}
|
|
if (len)
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
|
|
return str;
|
|
}
|
|
|
|
void
|
|
str_grow(register STR *str, int len)
|
|
{
|
|
if (len && str)
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
|
|
}
|
|
|
|
/* make str point to what nstr did */
|
|
|
|
void
|
|
str_replace(register STR *str, register STR *nstr)
|
|
{
|
|
safefree(str->str_ptr);
|
|
str->str_ptr = nstr->str_ptr;
|
|
str->str_len = nstr->str_len;
|
|
str->str_cur = nstr->str_cur;
|
|
str->str_pok = nstr->str_pok;
|
|
if (str->str_nok = nstr->str_nok)
|
|
str->str_nval = nstr->str_nval;
|
|
safefree((char*)nstr);
|
|
}
|
|
|
|
void
|
|
str_free(register STR *str)
|
|
{
|
|
if (!str)
|
|
return;
|
|
if (str->str_len)
|
|
str->str_ptr[0] = '\0';
|
|
str->str_cur = 0;
|
|
str->str_nok = 0;
|
|
str->str_pok = 0;
|
|
str->str_link.str_next = freestrroot;
|
|
freestrroot = str;
|
|
}
|
|
|
|
int
|
|
str_len(register STR *str)
|
|
{
|
|
if (!str)
|
|
return 0;
|
|
if (!(str->str_pok))
|
|
str_2ptr(str);
|
|
if (str->str_len)
|
|
return str->str_cur;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
char *
|
|
str_gets(register STR *str, register FILE *fp)
|
|
{
|
|
#if defined(USE_STDIO_PTR) && defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
|
|
/* Here is some breathtakingly efficient cheating */
|
|
|
|
register char *bp; /* we're going to steal some values */
|
|
register int cnt; /* from the stdio struct and put EVERYTHING */
|
|
register STDCHAR *ptr; /* in the innermost loop into registers */
|
|
register char newline = '\n'; /* (assuming at least 6 registers) */
|
|
int i;
|
|
int bpx;
|
|
|
|
#if defined(VMS)
|
|
/* An ungetc()d char is handled separately from the regular
|
|
* buffer, so we getc() it back out and stuff it in the buffer.
|
|
*/
|
|
i = getc(fp);
|
|
if (i == EOF) return Nullch;
|
|
*(--((*fp)->_ptr)) = (unsigned char) i;
|
|
(*fp)->_cnt++;
|
|
#endif
|
|
|
|
cnt = FILE_cnt(fp); /* get count into register */
|
|
str->str_nok = 0; /* invalidate number */
|
|
str->str_pok = 1; /* validate pointer */
|
|
if (str->str_len <= cnt) /* make sure we have the room */
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), cnt+1);
|
|
bp = str->str_ptr; /* move these two too to registers */
|
|
ptr = FILE_ptr(fp);
|
|
for (;;) {
|
|
while (--cnt >= 0) {
|
|
if ((*bp++ = *ptr++) == newline)
|
|
if (bp <= str->str_ptr || bp[-2] != '\\')
|
|
goto thats_all_folks;
|
|
else {
|
|
line++;
|
|
bp -= 2;
|
|
}
|
|
}
|
|
|
|
FILE_cnt(fp) = cnt; /* deregisterize cnt and ptr */
|
|
FILE_ptr(fp) = ptr;
|
|
i = getc(fp); /* get more characters */
|
|
cnt = FILE_cnt(fp);
|
|
ptr = FILE_ptr(fp); /* reregisterize cnt and ptr */
|
|
|
|
bpx = bp - str->str_ptr; /* prepare for possible relocation */
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + cnt + 1);
|
|
bp = str->str_ptr + bpx; /* reconstitute our pointer */
|
|
|
|
if (i == newline) { /* all done for now? */
|
|
*bp++ = i;
|
|
goto thats_all_folks;
|
|
}
|
|
else if (i == EOF) /* all done for ever? */
|
|
goto thats_all_folks;
|
|
*bp++ = i; /* now go back to screaming loop */
|
|
}
|
|
|
|
thats_all_folks:
|
|
FILE_cnt(fp) = cnt; /* put these back or we're in trouble */
|
|
FILE_ptr(fp) = ptr;
|
|
*bp = '\0';
|
|
str->str_cur = bp - str->str_ptr; /* set length */
|
|
|
|
#else /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
|
|
/* The big, slow, and stupid way */
|
|
|
|
static char buf[4192];
|
|
|
|
if (fgets(buf, sizeof buf, fp) != Nullch)
|
|
str_set(str, buf);
|
|
else
|
|
str_set(str, No);
|
|
|
|
#endif /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
|
|
|
|
return str->str_cur ? str->str_ptr : Nullch;
|
|
}
|
|
|
|
void
|
|
str_inc(register STR *str)
|
|
{
|
|
register char *d;
|
|
|
|
if (!str)
|
|
return;
|
|
if (str->str_nok) {
|
|
str->str_nval += 1.0;
|
|
str->str_pok = 0;
|
|
return;
|
|
}
|
|
if (!str->str_pok) {
|
|
str->str_nval = 1.0;
|
|
str->str_nok = 1;
|
|
return;
|
|
}
|
|
for (d = str->str_ptr; *d && *d != '.'; d++) ;
|
|
d--;
|
|
if (!isdigit(*str->str_ptr) || !isdigit(*d) ) {
|
|
str_numset(str,atof(str->str_ptr) + 1.0); /* punt */
|
|
return;
|
|
}
|
|
while (d >= str->str_ptr) {
|
|
if (++*d <= '9')
|
|
return;
|
|
*(d--) = '0';
|
|
}
|
|
/* oh,oh, the number grew */
|
|
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + 2);
|
|
str->str_cur++;
|
|
for (d = str->str_ptr + str->str_cur; d > str->str_ptr; d--)
|
|
*d = d[-1];
|
|
*d = '1';
|
|
}
|
|
|
|
void
|
|
str_dec(register STR *str)
|
|
{
|
|
register char *d;
|
|
|
|
if (!str)
|
|
return;
|
|
if (str->str_nok) {
|
|
str->str_nval -= 1.0;
|
|
str->str_pok = 0;
|
|
return;
|
|
}
|
|
if (!str->str_pok) {
|
|
str->str_nval = -1.0;
|
|
str->str_nok = 1;
|
|
return;
|
|
}
|
|
for (d = str->str_ptr; *d && *d != '.'; d++) ;
|
|
d--;
|
|
if (!isdigit(*str->str_ptr) || !isdigit(*d) || (*d == '0' && d == str->str_ptr)) {
|
|
str_numset(str,atof(str->str_ptr) - 1.0); /* punt */
|
|
return;
|
|
}
|
|
while (d >= str->str_ptr) {
|
|
if (--*d >= '0')
|
|
return;
|
|
*(d--) = '9';
|
|
}
|
|
}
|
|
|
|
/* make a string that will exist for the duration of the expression eval */
|
|
|
|
STR *
|
|
str_mortal(STR *oldstr)
|
|
{
|
|
register STR *str = str_new(0);
|
|
static long tmps_size = -1;
|
|
|
|
str_sset(str,oldstr);
|
|
if (++tmps_max > tmps_size) {
|
|
tmps_size = tmps_max;
|
|
if (!(tmps_size & 127)) {
|
|
if (tmps_size)
|
|
tmps_list = (STR**)saferealloc((char*)tmps_list,
|
|
(tmps_size + 128) * sizeof(STR*) );
|
|
else
|
|
tmps_list = (STR**)safemalloc(128 * sizeof(char*));
|
|
}
|
|
}
|
|
tmps_list[tmps_max] = str;
|
|
return str;
|
|
}
|
|
|
|
STR *
|
|
str_make(char *s)
|
|
{
|
|
register STR *str = str_new(0);
|
|
|
|
str_set(str,s);
|
|
return str;
|
|
}
|
|
|
|
STR *
|
|
str_nmake(double n)
|
|
{
|
|
register STR *str = str_new(0);
|
|
|
|
str_numset(str,n);
|
|
return str;
|
|
}
|