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

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