[p5sagit/p5-mst-13.2.git] / x2p / str.c

/* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
 *
 *    Copyright (c) 1991, 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 $
 * Revision 4.1  92/08/07  18:29:26  lwall
 * 
 * Revision 4.0.1.1  91/06/07  12:20:08  lwall
 * patch4: new copyright notice
 * 
 * Revision 4.0  91/03/20  01:58:15  lwall
 * 4.0 baseline.
 * 
 */

#include "handy.h"
#include "EXTERN.h"
#include "util.h"
#include "a2p.h"

str_numset(str,num)
register STR *str;
double num;
{
    str->str_nval = num;
    str->str_pok = 0;		/* invalidate pointer */
    str->str_nok = 1;		/* validate number */
}

char *
str_2ptr(str)
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",str,str->str_ptr);
#endif
    return str->str_ptr;
}

double
str_2num(str)
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",str,str->str_nval);
#endif
    return str->str_nval;
}

str_sset(dstr,sstr)
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);
}

str_nset(str,ptr,len)
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 */
}

str_set(str,ptr)
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 */
}

str_chop(str,ptr)	/* like set but assuming ptr is in str */
register STR *str;
register char *ptr;
{
    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 */
}

str_ncat(str,ptr,len)
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 */
}

str_scat(dstr,sstr)
STR *dstr;
register STR *sstr;
{
    if (!(sstr->str_pok))
	str_2ptr(sstr);
    if (sstr)
	str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
}

str_cat(str,ptr)
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(str,from,delim,keeplist)
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 (index(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(len)
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(str,len)
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(str,nstr)
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(str)
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;
}

str_len(str)
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(str,fp)
register STR *str;
register FILE *fp;
{
#ifdef STDSTDIO		/* 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;

    cnt = fp->_cnt;			/* 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 = fp->_ptr;
    for (;;) {
	while (--cnt >= 0) {
	    if ((*bp++ = *ptr++) == newline)
		if (bp <= str->str_ptr || bp[-2] != '\\')
		    goto thats_all_folks;
		else {
		    line++;
		    bp -= 2;
		}
	}
	
	fp->_cnt = cnt;			/* deregisterize cnt and ptr */
	fp->_ptr = ptr;
	i = _filbuf(fp);		/* get more characters */
	cnt = fp->_cnt;
	ptr = fp->_ptr;			/* 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:
    fp->_cnt = cnt;			/* put these back or we're in trouble */
    fp->_ptr = ptr;
    *bp = '\0';
    str->str_cur = bp - str->str_ptr;	/* set length */

#else /* !STDSTDIO */	/* 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 /* STDSTDIO */

    return str->str_cur ? str->str_ptr : Nullch;
}

void
str_inc(str)
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(str)
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(oldstr)
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(s)
char *s;
{
    register STR *str = str_new(0);

    str_set(str,s);
    return str;
}

STR *
str_nmake(n)
double n;
{
    register STR *str = str_new(0);

    str_numset(str,n);
    return str;
}
Commit	Line	Data
79072805	1	/* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
a687059c	2	*
d48672a2	3	* Copyright (c) 1991, Larry Wall
a687059c	4	*
d48672a2	5	* You may distribute under the terms of either the GNU General Public
d48672a2	6	* License or the Artistic License, as specified in the README file.
8d063cd8	7	*
8d063cd8	8	* $Log: str.c,v $
79072805	9	* Revision 4.1 92/08/07 18:29:26 lwall
79072805	10	*
d48672a2	11	* Revision 4.0.1.1 91/06/07 12:20:08 lwall
	12	* patch4: new copyright notice
	13	*
fe14fcc3	14	* Revision 4.0 91/03/20 01:58:15 lwall
fe14fcc3	15	* 4.0 baseline.
8d063cd8	16	*
	17	*/
	18
	19	#include "handy.h"
	20	#include "EXTERN.h"
	21	#include "util.h"
	22	#include "a2p.h"
	23
	24	str_numset(str,num)
	25	register STR *str;
	26	double num;
	27	{
	28	str->str_nval = num;
	29	str->str_pok = 0; /* invalidate pointer */
	30	str->str_nok = 1; /* validate number */
	31	}
	32
	33	char *
	34	str_2ptr(str)
	35	register STR *str;
	36	{
	37	register char *s;
	38
	39	if (!str)
	40	return "";
	41	GROWSTR(&(str->str_ptr), &(str->str_len), 24);
	42	s = str->str_ptr;
	43	if (str->str_nok) {
	44	sprintf(s,"%.20g",str->str_nval);
	45	while (*s) s++;
	46	}
	47	*s = '\0';
	48	str->str_cur = s - str->str_ptr;
	49	str->str_pok = 1;
	50	#ifdef DEBUGGING
	51	if (debug & 32)
	52	fprintf(stderr,"0x%lx ptr(%s)\n",str,str->str_ptr);
	53	#endif
	54	return str->str_ptr;
	55	}
	56
	57	double
	58	str_2num(str)
	59	register STR *str;
	60	{
	61	if (!str)
	62	return 0.0;
	63	if (str->str_len && str->str_pok)
	64	str->str_nval = atof(str->str_ptr);
	65	else
	66	str->str_nval = 0.0;
	67	str->str_nok = 1;
	68	#ifdef DEBUGGING
	69	if (debug & 32)
	70	fprintf(stderr,"0x%lx num(%g)\n",str,str->str_nval);
	71	#endif
	72	return str->str_nval;
	73	}
	74
	75	str_sset(dstr,sstr)
	76	STR *dstr;
	77	register STR *sstr;
	78	{
	79	if (!sstr)
80	str_nset(dstr,No,0);
81	else if (sstr->str_nok)
82	str_numset(dstr,sstr->str_nval);
83	else if (sstr->str_pok)
84	str_nset(dstr,sstr->str_ptr,sstr->str_cur);
85	else
86	str_nset(dstr,"",0);
87	}
88
89	str_nset(str,ptr,len)
90	register STR *str;
91	register char *ptr;
92	register int len;
93	{
94	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
95	bcopy(ptr,str->str_ptr,len);
96	str->str_cur = len;
97	*(str->str_ptr+str->str_cur) = '\0';
98	str->str_nok = 0; /* invalidate number */
99	str->str_pok = 1; /* validate pointer */
100	}
101
102	str_set(str,ptr)
103	register STR *str;
104	register char *ptr;
105	{
106	register int len;
107
108	if (!ptr)
109	ptr = "";
110	len = strlen(ptr);
111	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
112	bcopy(ptr,str->str_ptr,len+1);
113	str->str_cur = len;
114	str->str_nok = 0; /* invalidate number */
115	str->str_pok = 1; /* validate pointer */
116	}
117
118	str_chop(str,ptr) /* like set but assuming ptr is in str */
119	register STR *str;
120	register char *ptr;
121	{
122	if (!(str->str_pok))
123	str_2ptr(str);
124	str->str_cur -= (ptr - str->str_ptr);
125	bcopy(ptr,str->str_ptr, str->str_cur + 1);
126	str->str_nok = 0; /* invalidate number */
127	str->str_pok = 1; /* validate pointer */
128	}
129
130	str_ncat(str,ptr,len)
131	register STR *str;
132	register char *ptr;
133	register int len;
134	{
135	if (!(str->str_pok))
136	str_2ptr(str);
137	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
138	bcopy(ptr,str->str_ptr+str->str_cur,len);
139	str->str_cur += len;
140	*(str->str_ptr+str->str_cur) = '\0';
141	str->str_nok = 0; /* invalidate number */
142	str->str_pok = 1; /* validate pointer */
143	}
144
145	str_scat(dstr,sstr)
146	STR *dstr;
147	register STR *sstr;
148	{
149	if (!(sstr->str_pok))
150	str_2ptr(sstr);
151	if (sstr)
152	str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
153	}
154
155	str_cat(str,ptr)
156	register STR *str;
157	register char *ptr;
158	{
159	register int len;
160
161	if (!ptr)
162	return;
163	if (!(str->str_pok))
164	str_2ptr(str);
165	len = strlen(ptr);
166	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
167	bcopy(ptr,str->str_ptr+str->str_cur,len+1);
168	str->str_cur += len;
169	str->str_nok = 0; /* invalidate number */
170	str->str_pok = 1; /* validate pointer */
171	}
172
173	char *
174	str_append_till(str,from,delim,keeplist)
175	register STR *str;
176	register char *from;
177	register int delim;
178	char *keeplist;
179	{
180	register char *to;
181	register int len;
182
183	if (!from)
184	return Nullch;
185	len = strlen(from);
186	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
187	str->str_nok = 0; /* invalidate number */
188	str->str_pok = 1; /* validate pointer */
189	to = str->str_ptr+str->str_cur;
190	for (; *from; from++,to++) {
191	if (*from == '\\' && from[1] && delim != '\\') {
192	if (!keeplist) {
193	if (from[1] == delim \|\| from[1] == '\\')
194	from++;
195	else
196	to++ = from++;
197	}
198	else if (index(keeplist,from[1]))
199	to++ = from++;
200	else
201	from++;
202	}
203	else if (*from == delim)
204	break;
205	to = from;
206	}
207	*to = '\0';
208	str->str_cur = to - str->str_ptr;
209	return from;
210	}
211
212	STR *
213	str_new(len)
214	int len;
215	{
216	register STR *str;
217
218	if (freestrroot) {
219	str = freestrroot;
220	freestrroot = str->str_link.str_next;
221	}
222	else {
223	str = (STR *) safemalloc(sizeof(STR));
224	bzero((char*)str,sizeof(STR));
225	}
226	if (len)
227	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
228	return str;
229	}
230
231	void
232	str_grow(str,len)
233	register STR *str;
234	int len;
235	{
236	if (len && str)
237	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
238	}
239
240	/* make str point to what nstr did */
241
242	void
243	str_replace(str,nstr)
244	register STR *str;
245	register STR *nstr;
246	{
247	safefree(str->str_ptr);
248	str->str_ptr = nstr->str_ptr;
249	str->str_len = nstr->str_len;
250	str->str_cur = nstr->str_cur;
251	str->str_pok = nstr->str_pok;
252	if (str->str_nok = nstr->str_nok)
253	str->str_nval = nstr->str_nval;
254	safefree((char*)nstr);
255	}
256
257	void
258	str_free(str)
259	register STR *str;
260	{
261	if (!str)
262	return;
263	if (str->str_len)
264	str->str_ptr[0] = '\0';
265	str->str_cur = 0;
266	str->str_nok = 0;
267	str->str_pok = 0;
268	str->str_link.str_next = freestrroot;
269	freestrroot = str;
270	}
271
272	str_len(str)
273	register STR *str;
274	{
275	if (!str)
276	return 0;
277	if (!(str->str_pok))
278	str_2ptr(str);
279	if (str->str_len)
280	return str->str_cur;
281	else
282	return 0;
283	}
284
285	char *
286	str_gets(str,fp)
287	register STR *str;
288	register FILE *fp;
289	{
290	#ifdef STDSTDIO /* Here is some breathtakingly efficient cheating */
291
292	register char bp; / we're going to steal some values */
293	register int cnt; /* from the stdio struct and put EVERYTHING */
378cc40b	294	register STDCHAR ptr; / in the innermost loop into registers */
8d063cd8	295	register char newline = '\n'; /* (assuming at least 6 registers) */
	296	int i;
	297	int bpx;
	298
	299	cnt = fp->_cnt; /* get count into register */
	300	str->str_nok = 0; /* invalidate number */
	301	str->str_pok = 1; /* validate pointer */
	302	if (str->str_len <= cnt) /* make sure we have the room */
	303	GROWSTR(&(str->str_ptr), &(str->str_len), cnt+1);
	304	bp = str->str_ptr; /* move these two too to registers */
	305	ptr = fp->_ptr;
	306	for (;;) {
378cc40b	307	while (--cnt >= 0) {
	308	if ((bp++ = ptr++) == newline)
	309	if (bp <= str->str_ptr \|\| bp[-2] != '\\')
	310	goto thats_all_folks;
	311	else {
	312	line++;
	313	bp -= 2;
	314	}
8d063cd8	315	}
	316
	317	fp->_cnt = cnt; /* deregisterize cnt and ptr */
	318	fp->_ptr = ptr;
	319	i = _filbuf(fp); /* get more characters */
	320	cnt = fp->_cnt;
	321	ptr = fp->_ptr; /* reregisterize cnt and ptr */
	322
	323	bpx = bp - str->str_ptr; /* prepare for possible relocation */
	324	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + cnt + 1);
	325	bp = str->str_ptr + bpx; /* reconstitute our pointer */
	326
	327	if (i == newline) { /* all done for now? */
	328	*bp++ = i;
	329	goto thats_all_folks;
	330	}
	331	else if (i == EOF) /* all done for ever? */
	332	goto thats_all_folks;
	333	bp++ = i; / now go back to screaming loop */
	334	}
	335
	336	thats_all_folks:
	337	fp->_cnt = cnt; /* put these back or we're in trouble */
	338	fp->_ptr = ptr;
	339	*bp = '\0';
	340	str->str_cur = bp - str->str_ptr; /* set length */
	341
	342	#else /* !STDSTDIO / / The big, slow, and stupid way */
	343
	344	static char buf[4192];
	345
	346	if (fgets(buf, sizeof buf, fp) != Nullch)
	347	str_set(str, buf);
	348	else
	349	str_set(str, No);
	350
	351	#endif /* STDSTDIO */
	352
	353	return str->str_cur ? str->str_ptr : Nullch;
	354	}
	355
	356	void
	357	str_inc(str)
	358	register STR *str;
	359	{
	360	register char *d;
	361
	362	if (!str)
	363	return;
	364	if (str->str_nok) {
	365	str->str_nval += 1.0;
	366	str->str_pok = 0;
	367	return;
	368	}
	369	if (!str->str_pok) {
	370	str->str_nval = 1.0;
	371	str->str_nok = 1;
	372	return;
	373	}
	374	for (d = str->str_ptr; d && d != '.'; d++) ;
	375	d--;
	376	if (!isdigit(str->str_ptr) \|\| !isdigit(d) ) {
	377	str_numset(str,atof(str->str_ptr) + 1.0); /* punt */
	378	return;
379	}
380	while (d >= str->str_ptr) {
381	if (++*d <= '9')
382	return;
383	*(d--) = '0';
384	}
385	/* oh,oh, the number grew */
386	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + 2);
387	str->str_cur++;
388	for (d = str->str_ptr + str->str_cur; d > str->str_ptr; d--)
389	*d = d[-1];
390	*d = '1';
391	}
392
393	void
394	str_dec(str)
395	register STR *str;
396	{
397	register char *d;
398
399	if (!str)
400	return;
401	if (str->str_nok) {
402	str->str_nval -= 1.0;
403	str->str_pok = 0;
404	return;
405	}
406	if (!str->str_pok) {
407	str->str_nval = -1.0;
408	str->str_nok = 1;
409	return;
410	}
411	for (d = str->str_ptr; d && d != '.'; d++) ;
412	d--;
413	if (!isdigit(str->str_ptr) \|\| !isdigit(d) \|\| (*d == '0' && d == str->str_ptr)) {
414	str_numset(str,atof(str->str_ptr) - 1.0); /* punt */
415	return;
416	}
417	while (d >= str->str_ptr) {
418	if (--*d >= '0')
419	return;
420	*(d--) = '9';
421	}
422	}
423
424	/* make a string that will exist for the duration of the expression eval */
425
426	STR *
fe14fcc3	427	str_mortal(oldstr)
8d063cd8	428	STR *oldstr;
	429	{
	430	register STR *str = str_new(0);
	431	static long tmps_size = -1;
	432
	433	str_sset(str,oldstr);
	434	if (++tmps_max > tmps_size) {
	435	tmps_size = tmps_max;
	436	if (!(tmps_size & 127)) {
	437	if (tmps_size)
	438	tmps_list = (STR*)saferealloc((char)tmps_list,
	439	(tmps_size + 128) * sizeof(STR*) );
	440	else
	441	tmps_list = (STR*)safemalloc(128 sizeof(char*));
	442	}
	443	}
	444	tmps_list[tmps_max] = str;
	445	return str;
	446	}
	447
	448	STR *
	449	str_make(s)
	450	char *s;
	451	{
	452	register STR *str = str_new(0);
	453
	454	str_set(str,s);
	455	return str;
	456	}
	457
	458	STR *
	459	str_nmake(n)
	460	double n;
	461	{
	462	register STR *str = str_new(0);
	463
	464	str_numset(str,n);
	465	return str;
	466	}