[perl5.git] / x2p / str.c

/* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
 *
 *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
 *    2001, 2002, by Larry Wall and others
 *
 *    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);
    memcpy(str->str_ptr,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);
    memcpy(str->str_ptr,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);
    memcpy(str->str_ptr, 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);
    memcpy(str->str_ptr+str->str_cur, 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_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);
    memcpy(str->str_ptr+str->str_cur, ptr, 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));
	memset((char*)str,0,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 = (STDCHAR*)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) = (void*)ptr; /* LHS STDCHAR* cast non-portable */
	i = getc(fp);		/* get more characters */
	cnt = FILE_cnt(fp);
	ptr = (STDCHAR*)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) = (void*)ptr; /* LHS STDCHAR* cast non-portable */
    *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;
}
Commit	Line	Data
79072805	1	/* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
a687059c	2	*
4bb101f2 JH	3	* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
4bb101f2 JH	4	* 2001, 2002, by Larry Wall and others
a687059c	5	*
d48672a2 LW	6	* You may distribute under the terms of either the GNU General Public
d48672a2 LW	7	* License or the Artistic License, as specified in the README file.
8d063cd8 LW	8	*
8d063cd8 LW	9	* $Log: str.c,v $
8d063cd8 LW	10	*/
8d063cd8 LW	11
8d063cd8	12	#include "EXTERN.h"
8d063cd8	13	#include "a2p.h"
9c8d0b29	14	#include "util.h"
8d063cd8	15
9c8d0b29	16	void
f0f333f4	17	str_numset(register STR *str, double num)
8d063cd8 LW	18	{
	19	str->str_nval = num;
	20	str->str_pok = 0; /* invalidate pointer */
	21	str->str_nok = 1; /* validate number */
	22	}
	23
	24	char *
f0f333f4	25	str_2ptr(register STR *str)
8d063cd8 LW	26	{
	27	register char *s;
	28
	29	if (!str)
	30	return "";
	31	GROWSTR(&(str->str_ptr), &(str->str_len), 24);
	32	s = str->str_ptr;
	33	if (str->str_nok) {
	34	sprintf(s,"%.20g",str->str_nval);
	35	while (*s) s++;
	36	}
	37	*s = '\0';
	38	str->str_cur = s - str->str_ptr;
	39	str->str_pok = 1;
	40	#ifdef DEBUGGING
	41	if (debug & 32)
68dc0745	42	fprintf(stderr,"0x%lx ptr(%s)\n",(unsigned long)str,str->str_ptr);
8d063cd8 LW	43	#endif
	44	return str->str_ptr;
	45	}
	46
	47	double
f0f333f4	48	str_2num(register STR *str)
8d063cd8 LW	49	{
	50	if (!str)
	51	return 0.0;
	52	if (str->str_len && str->str_pok)
	53	str->str_nval = atof(str->str_ptr);
	54	else
	55	str->str_nval = 0.0;
	56	str->str_nok = 1;
	57	#ifdef DEBUGGING
	58	if (debug & 32)
20d72259	59	fprintf(stderr,"0x%lx num(%g)\n",(unsigned long)str,str->str_nval);
8d063cd8 LW	60	#endif
	61	return str->str_nval;
	62	}
	63
9c8d0b29	64	void
f0f333f4	65	str_sset(STR dstr, register STR sstr)
8d063cd8 LW	66	{
	67	if (!sstr)
	68	str_nset(dstr,No,0);
	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);
	73	else
	74	str_nset(dstr,"",0);
	75	}
	76
9c8d0b29	77	void
f0f333f4	78	str_nset(register STR str, register char ptr, register int len)
8d063cd8 LW	79	{
8d063cd8 LW	80	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
2ef53570	81	memcpy(str->str_ptr,ptr,len);
8d063cd8 LW	82	str->str_cur = len;
	83	*(str->str_ptr+str->str_cur) = '\0';
	84	str->str_nok = 0; /* invalidate number */
	85	str->str_pok = 1; /* validate pointer */
	86	}
	87
9c8d0b29	88	void
f0f333f4	89	str_set(register STR str, register char ptr)
8d063cd8 LW	90	{
	91	register int len;
	92
	93	if (!ptr)
	94	ptr = "";
	95	len = strlen(ptr);
	96	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
2ef53570	97	memcpy(str->str_ptr,ptr,len+1);
8d063cd8 LW	98	str->str_cur = len;
	99	str->str_nok = 0; /* invalidate number */
	100	str->str_pok = 1; /* validate pointer */
	101	}
	102
9c8d0b29	103	void
f0f333f4 NIS	104	str_chop(register STR str, register char ptr) /* like set but assuming ptr is in str */
	105
	106
8d063cd8 LW	107	{
	108	if (!(str->str_pok))
	109	str_2ptr(str);
	110	str->str_cur -= (ptr - str->str_ptr);
2ef53570	111	memcpy(str->str_ptr, ptr, str->str_cur + 1);
8d063cd8 LW	112	str->str_nok = 0; /* invalidate number */
	113	str->str_pok = 1; /* validate pointer */
	114	}
	115
9c8d0b29	116	void
f0f333f4	117	str_ncat(register STR str, register char ptr, register int len)
8d063cd8 LW	118	{
	119	if (!(str->str_pok))
	120	str_2ptr(str);
	121	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
2ef53570	122	memcpy(str->str_ptr+str->str_cur, ptr, len);
8d063cd8 LW	123	str->str_cur += len;
	124	*(str->str_ptr+str->str_cur) = '\0';
	125	str->str_nok = 0; /* invalidate number */
	126	str->str_pok = 1; /* validate pointer */
	127	}
	128
9c8d0b29	129	void
f0f333f4	130	str_scat(STR dstr, register STR sstr)
8d063cd8 LW	131	{
	132	if (!(sstr->str_pok))
	133	str_2ptr(sstr);
	134	if (sstr)
	135	str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
	136	}
	137
9c8d0b29	138	void
f0f333f4	139	str_cat(register STR str, register char ptr)
8d063cd8 LW	140	{
	141	register int len;
	142
	143	if (!ptr)
	144	return;
	145	if (!(str->str_pok))
	146	str_2ptr(str);
	147	len = strlen(ptr);
	148	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
2ef53570	149	memcpy(str->str_ptr+str->str_cur, ptr, len+1);
8d063cd8 LW	150	str->str_cur += len;
	151	str->str_nok = 0; /* invalidate number */
	152	str->str_pok = 1; /* validate pointer */
	153	}
	154
	155	char *
f0f333f4	156	str_append_till(register STR str, register char from, register int delim, char *keeplist)
8d063cd8 LW	157	{
	158	register char *to;
	159	register int len;
	160
	161	if (!from)
	162	return Nullch;
	163	len = strlen(from);
	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 != '\\') {
	170	if (!keeplist) {
	171	if (from[1] == delim \|\| from[1] == '\\')
	172	from++;
	173	else
	174	to++ = from++;
	175	}
a0d0e21e	176	else if (strchr(keeplist,from[1]))
8d063cd8 LW	177	to++ = from++;
	178	else
	179	from++;
	180	}
	181	else if (*from == delim)
	182	break;
	183	to = from;
	184	}
	185	*to = '\0';
	186	str->str_cur = to - str->str_ptr;
	187	return from;
	188	}
	189
	190	STR *
f0f333f4	191	str_new(int len)
8d063cd8 LW	192	{
	193	register STR *str;
	194
	195	if (freestrroot) {
	196	str = freestrroot;
	197	freestrroot = str->str_link.str_next;
	198	}
	199	else {
	200	str = (STR *) safemalloc(sizeof(STR));
2ef53570	201	memset((char*)str,0,sizeof(STR));
8d063cd8 LW	202	}
	203	if (len)
	204	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
	205	return str;
	206	}
	207
	208	void
f0f333f4	209	str_grow(register STR *str, int len)
8d063cd8 LW	210	{
	211	if (len && str)
	212	GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
	213	}
	214
	215	/* make str point to what nstr did */
	216
	217	void
f0f333f4	218	str_replace(register STR str, register STR nstr)
8d063cd8	219	{
5e212cb5	220	safefree(str->str_ptr);
8d063cd8 LW	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;
b7953727	225	if ((str->str_nok = nstr->str_nok))
8d063cd8 LW	226	str->str_nval = nstr->str_nval;
	227	safefree((char*)nstr);
	228	}
	229
	230	void
f0f333f4	231	str_free(register STR *str)
8d063cd8 LW	232	{
	233	if (!str)
	234	return;
	235	if (str->str_len)
	236	str->str_ptr[0] = '\0';
	237	str->str_cur = 0;
	238	str->str_nok = 0;
	239	str->str_pok = 0;
	240	str->str_link.str_next = freestrroot;
	241	freestrroot = str;
	242	}
	243
9c8d0b29	244	int
f0f333f4	245	str_len(register STR *str)
8d063cd8 LW	246	{
	247	if (!str)
	248	return 0;
	249	if (!(str->str_pok))
	250	str_2ptr(str);
	251	if (str->str_len)
	252	return str->str_cur;
	253	else
	254	return 0;
	255	}
	256
	257	char *
f0f333f4	258	str_gets(register STR str, register FILE fp)
8d063cd8	259	{
c2960299 AD	260	#if defined(USE_STDIO_PTR) && defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
c2960299 AD	261	/* Here is some breathtakingly efficient cheating */
8d063cd8 LW	262
	263	register char bp; / we're going to steal some values */
	264	register int cnt; /* from the stdio struct and put EVERYTHING */
378cc40b	265	register STDCHAR ptr; / in the innermost loop into registers */
8d063cd8 LW	266	register char newline = '\n'; /* (assuming at least 6 registers) */
	267	int i;
	268	int bpx;
	269
44a8e56a	270	#if defined(VMS)
	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.
	273	*/
	274	i = getc(fp);
	275	if (i == EOF) return Nullch;
	276	(--((fp)->_ptr)) = (unsigned char) i;
	277	(*fp)->_cnt++;
	278	#endif
	279
16d20bd9	280	cnt = FILE_cnt(fp); /* get count into register */
8d063cd8 LW	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 */
cc00df79	286	ptr = (STDCHAR*)FILE_ptr(fp);
8d063cd8	287	for (;;) {
378cc40b	288	while (--cnt >= 0) {
3f939f22	289	if ((bp++ = ptr++) == newline) {
378cc40b LW	290	if (bp <= str->str_ptr \|\| bp[-2] != '\\')
	291	goto thats_all_folks;
	292	else {
	293	line++;
	294	bp -= 2;
	295	}
3f939f22	296	}
8d063cd8 LW	297	}
8d063cd8 LW	298
16d20bd9	299	FILE_cnt(fp) = cnt; /* deregisterize cnt and ptr */
cc00df79	300	FILE_ptr(fp) = (void)ptr; / LHS STDCHAR* cast non-portable */
44a8e56a	301	i = getc(fp); /* get more characters */
16d20bd9	302	cnt = FILE_cnt(fp);
5faea5d5	303	ptr = (STDCHAR)FILE_ptr(fp); / reregisterize cnt and ptr */
8d063cd8 LW	304
	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 */
	308
	309	if (i == newline) { /* all done for now? */
	310	*bp++ = i;
	311	goto thats_all_folks;
	312	}
	313	else if (i == EOF) /* all done for ever? */
	314	goto thats_all_folks;
	315	bp++ = i; / now go back to screaming loop */
	316	}
	317
	318	thats_all_folks:
16d20bd9	319	FILE_cnt(fp) = cnt; /* put these back or we're in trouble */
5faea5d5	320	FILE_ptr(fp) = (void)ptr; / LHS STDCHAR* cast non-portable */
8d063cd8 LW	321	*bp = '\0';
	322	str->str_cur = bp - str->str_ptr; /* set length */
	323
c2960299 AD	324	#else /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
c2960299 AD	325	/* The big, slow, and stupid way */
8d063cd8 LW	326
	327	static char buf[4192];
	328
	329	if (fgets(buf, sizeof buf, fp) != Nullch)
	330	str_set(str, buf);
	331	else
	332	str_set(str, No);
	333
c2960299	334	#endif /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
8d063cd8 LW	335
	336	return str->str_cur ? str->str_ptr : Nullch;
	337	}
	338
	339	void
f0f333f4	340	str_inc(register STR *str)
8d063cd8 LW	341	{
	342	register char *d;
	343
	344	if (!str)
	345	return;
	346	if (str->str_nok) {
	347	str->str_nval += 1.0;
	348	str->str_pok = 0;
	349	return;
	350	}
	351	if (!str->str_pok) {
	352	str->str_nval = 1.0;
	353	str->str_nok = 1;
	354	return;
	355	}
	356	for (d = str->str_ptr; d && d != '.'; d++) ;
	357	d--;
3f939f22	358	if (!isDIGIT(str->str_ptr) \|\| !isDIGIT(d) ) {
8d063cd8 LW	359	str_numset(str,atof(str->str_ptr) + 1.0); /* punt */
	360	return;
	361	}
	362	while (d >= str->str_ptr) {
	363	if (++*d <= '9')
	364	return;
	365	*(d--) = '0';
	366	}
	367	/* oh,oh, the number grew */
	368	GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + 2);
	369	str->str_cur++;
	370	for (d = str->str_ptr + str->str_cur; d > str->str_ptr; d--)
	371	*d = d[-1];
	372	*d = '1';
	373	}
	374
	375	void
f0f333f4	376	str_dec(register STR *str)
8d063cd8 LW	377	{
	378	register char *d;
	379
	380	if (!str)
	381	return;
	382	if (str->str_nok) {
	383	str->str_nval -= 1.0;
	384	str->str_pok = 0;
	385	return;
	386	}
	387	if (!str->str_pok) {
	388	str->str_nval = -1.0;
	389	str->str_nok = 1;
	390	return;
	391	}
	392	for (d = str->str_ptr; d && d != '.'; d++) ;
	393	d--;
3f939f22	394	if (!isDIGIT(str->str_ptr) \|\| !isDIGIT(d) \|\| (*d == '0' && d == str->str_ptr)) {
8d063cd8 LW	395	str_numset(str,atof(str->str_ptr) - 1.0); /* punt */
	396	return;
	397	}
	398	while (d >= str->str_ptr) {
	399	if (--*d >= '0')
	400	return;
	401	*(d--) = '9';
	402	}
	403	}
	404
	405	/* make a string that will exist for the duration of the expression eval */
	406
	407	STR *
f0f333f4	408	str_mortal(STR *oldstr)
8d063cd8 LW	409	{
	410	register STR *str = str_new(0);
	411	static long tmps_size = -1;
	412
	413	str_sset(str,oldstr);
	414	if (++tmps_max > tmps_size) {
	415	tmps_size = tmps_max;
	416	if (!(tmps_size & 127)) {
	417	if (tmps_size)
	418	tmps_list = (STR*)saferealloc((char)tmps_list,
	419	(tmps_size + 128) * sizeof(STR*) );
	420	else
	421	tmps_list = (STR*)safemalloc(128 sizeof(char*));
	422	}
	423	}
	424	tmps_list[tmps_max] = str;
	425	return str;
	426	}
	427
	428	STR *
f0f333f4	429	str_make(char *s)
8d063cd8 LW	430	{
	431	register STR *str = str_new(0);
	432
	433	str_set(str,s);
	434	return str;
	435	}
	436
	437	STR *
f0f333f4	438	str_nmake(double n)
8d063cd8 LW	439	{
	440	register STR *str = str_new(0);
	441
	442	str_numset(str,n);
	443	return str;
	444	}