[p5sagit/p5-mst-13.2.git] / form.c

/* $Header: form.c,v 3.0.1.2 90/08/09 03:38:40 lwall Locked $
 *
 *    Copyright (c) 1989, Larry Wall
 *
 *    You may distribute under the terms of the GNU General Public License
 *    as specified in the README file that comes with the perl 3.0 kit.
 *
 * $Log:	form.c,v $
 * Revision 3.0.1.2  90/08/09  03:38:40  lwall
 * patch19: did preliminary work toward debugging packages and evals
 * 
 * Revision 3.0.1.1  90/02/28  17:39:34  lwall
 * patch9: ... in format threw off subsequent field
 * 
 * Revision 3.0  89/10/18  15:17:26  lwall
 * 3.0 baseline
 * 
 */

#include "EXTERN.h"
#include "perl.h"

/* Forms stuff */

void
form_parseargs(fcmd)
register FCMD *fcmd;
{
    register int i;
    register ARG *arg;
    register int items;
    STR *str;
    ARG *parselist();
    line_t oldline = curcmd->c_line;
    int oldsave = savestack->ary_fill;

    str = fcmd->f_unparsed;
    curcmd->c_line = fcmd->f_line;
    fcmd->f_unparsed = Nullstr;
    (void)savehptr(&curstash);
    curstash = str->str_u.str_hash;
    arg = parselist(str);
    restorelist(oldsave);

    items = arg->arg_len - 1;	/* ignore $$ on end */
    for (i = 1; i <= items; i++) {
	if (!fcmd || fcmd->f_type == F_NULL)
	    fatal("Too many field values");
	dehoist(arg,i);
	fcmd->f_expr = make_op(O_ITEM,1,
	  arg[i].arg_ptr.arg_arg,Nullarg,Nullarg);
	if (fcmd->f_flags & FC_CHOP) {
	    if ((fcmd->f_expr[1].arg_type & A_MASK) == A_STAB)
		fcmd->f_expr[1].arg_type = A_LVAL;
	    else if ((fcmd->f_expr[1].arg_type & A_MASK) == A_EXPR)
		fcmd->f_expr[1].arg_type = A_LEXPR;
	    else
		fatal("^ field requires scalar lvalue");
	}
	fcmd = fcmd->f_next;
    }
    if (fcmd && fcmd->f_type)
	fatal("Not enough field values");
    curcmd->c_line = oldline;
    Safefree(arg);
    str_free(str);
}

int newsize;

#define CHKLEN(allow) \
newsize = (d - orec->o_str) + (allow); \
if (newsize >= curlen) { \
    curlen = d - orec->o_str; \
    GROWSTR(&orec->o_str,&orec->o_len,orec->o_len + (allow)); \
    d = orec->o_str + curlen;	/* in case it moves */ \
    curlen = orec->o_len - 2; \
}

format(orec,fcmd,sp)
register struct outrec *orec;
register FCMD *fcmd;
int sp;
{
    register char *d = orec->o_str;
    register char *s;
    register int curlen = orec->o_len - 2;
    register int size;
    FCMD *nextfcmd;
    FCMD *linebeg = fcmd;
    char tmpchar;
    char *t;
    CMD mycmd;
    STR *str;
    char *chophere;

    mycmd.c_type = C_NULL;
    orec->o_lines = 0;
    for (; fcmd; fcmd = nextfcmd) {
	nextfcmd = fcmd->f_next;
	CHKLEN(fcmd->f_presize);
	if (s = fcmd->f_pre) {
	    while (*s) {
		if (*s == '\n') {
		    while (d > orec->o_str && (d[-1] == ' ' || d[-1] == '\t'))
			d--;
		    if (fcmd->f_flags & FC_NOBLANK) {
			if (d == orec->o_str || d[-1] == '\n') {
			    orec->o_lines--;	/* don't print blank line */
			    linebeg = fcmd->f_next;
			    break;
			}
			else if (fcmd->f_flags & FC_REPEAT)
			    nextfcmd = linebeg;
		    }
		    else
			linebeg = fcmd->f_next;
		}
		*d++ = *s++;
	    }
	}
	if (fcmd->f_unparsed)
	    form_parseargs(fcmd);
	switch (fcmd->f_type) {
	case F_NULL:
	    orec->o_lines++;
	    break;
	case F_LEFT:
	    (void)eval(fcmd->f_expr,G_SCALAR,sp);
	    str = stack->ary_array[sp+1];
	    s = str_get(str);
	    size = fcmd->f_size;
	    CHKLEN(size);
	    chophere = Nullch;
	    while (size && *s && *s != '\n') {
		if (*s == '\t')
		    *s = ' ';
		size--;
		if (*s && index(chopset,(*d++ = *s++)))
		    chophere = s;
		if (*s == '\n' && (fcmd->f_flags & FC_CHOP))
		    *s = ' ';
	    }
	    if (size)
		chophere = s;
	    else if (chophere && chophere < s && *s && index(chopset,*s))
		chophere = s;
	    if (fcmd->f_flags & FC_CHOP) {
		if (!chophere)
		    chophere = s;
		size += (s - chophere);
		d -= (s - chophere);
		if (fcmd->f_flags & FC_MORE &&
		  *chophere && strNE(chophere,"\n")) {
		    while (size < 3) {
			d--;
			size++;
		    }
		    while (d[-1] == ' ' && size < fcmd->f_size) {
			d--;
			size++;
		    }
		    *d++ = '.';
		    *d++ = '.';
		    *d++ = '.';
		    size -= 3;
		}
		while (*chophere && index(chopset,*chophere))
		    chophere++;
		str_chop(str,chophere);
	    }
	    if (fcmd->f_next && fcmd->f_next->f_pre[0] == '\n')
		size = 0;			/* no spaces before newline */
	    while (size) {
		size--;
		*d++ = ' ';
	    }
	    break;
	case F_RIGHT:
	    (void)eval(fcmd->f_expr,G_SCALAR,sp);
	    str = stack->ary_array[sp+1];
	    t = s = str_get(str);
	    size = fcmd->f_size;
	    CHKLEN(size);
	    chophere = Nullch;
	    while (size && *s && *s != '\n') {
		if (*s == '\t')
		    *s = ' ';
		size--;
		if (*s && index(chopset,*s++))
		    chophere = s;
		if (*s == '\n' && (fcmd->f_flags & FC_CHOP))
		    *s = ' ';
	    }
	    if (size)
		chophere = s;
	    else if (chophere && chophere < s && *s && index(chopset,*s))
		chophere = s;
	    if (fcmd->f_flags & FC_CHOP) {
		if (!chophere)
		    chophere = s;
		size += (s - chophere);
		s = chophere;
		while (*chophere && index(chopset,*chophere))
		    chophere++;
	    }
	    tmpchar = *s;
	    *s = '\0';
	    while (size) {
		size--;
		*d++ = ' ';
	    }
	    size = s - t;
	    (void)bcopy(t,d,size);
	    d += size;
	    *s = tmpchar;
	    if (fcmd->f_flags & FC_CHOP)
		str_chop(str,chophere);
	    break;
	case F_CENTER: {
	    int halfsize;

	    (void)eval(fcmd->f_expr,G_SCALAR,sp);
	    str = stack->ary_array[sp+1];
	    t = s = str_get(str);
	    size = fcmd->f_size;
	    CHKLEN(size);
	    chophere = Nullch;
	    while (size && *s && *s != '\n') {
		if (*s == '\t')
		    *s = ' ';
		size--;
		if (*s && index(chopset,*s++))
		    chophere = s;
		if (*s == '\n' && (fcmd->f_flags & FC_CHOP))
		    *s = ' ';
	    }
	    if (size)
		chophere = s;
	    else if (chophere && chophere < s && *s && index(chopset,*s))
		chophere = s;
	    if (fcmd->f_flags & FC_CHOP) {
		if (!chophere)
		    chophere = s;
		size += (s - chophere);
		s = chophere;
		while (*chophere && index(chopset,*chophere))
		    chophere++;
	    }
	    tmpchar = *s;
	    *s = '\0';
	    halfsize = size / 2;
	    while (size > halfsize) {
		size--;
		*d++ = ' ';
	    }
	    size = s - t;
	    (void)bcopy(t,d,size);
	    d += size;
	    *s = tmpchar;
	    if (fcmd->f_next && fcmd->f_next->f_pre[0] == '\n')
		size = 0;			/* no spaces before newline */
	    else
		size = halfsize;
	    while (size) {
		size--;
		*d++ = ' ';
	    }
	    if (fcmd->f_flags & FC_CHOP)
		str_chop(str,chophere);
	    break;
	}
	case F_LINES:
	    (void)eval(fcmd->f_expr,G_SCALAR,sp);
	    str = stack->ary_array[sp+1];
	    s = str_get(str);
	    size = str_len(str);
	    CHKLEN(size);
	    orec->o_lines += countlines(s);
	    (void)bcopy(s,d,size);
	    d += size;
	    linebeg = fcmd->f_next;
	    break;
	}
    }
    CHKLEN(1);
    *d++ = '\0';
}

countlines(s)
register char *s;
{
    register int count = 0;

    while (*s) {
	if (*s++ == '\n')
	    count++;
    }
    return count;
}

do_write(orec,stio,sp)
struct outrec *orec;
register STIO *stio;
int sp;
{
    FILE *ofp = stio->ofp;

#ifdef DEBUGGING
    if (debug & 256)
	fprintf(stderr,"left=%ld, todo=%ld\n",
	  (long)stio->lines_left, (long)orec->o_lines);
#endif
    if (stio->lines_left < orec->o_lines) {
	if (!stio->top_stab) {
	    STAB *topstab;

	    if (!stio->top_name)
		stio->top_name = savestr("top");
	    topstab = stabent(stio->top_name,FALSE);
	    if (!topstab || !stab_form(topstab)) {
		stio->lines_left = 100000000;
		goto forget_top;
	    }
	    stio->top_stab = topstab;
	}
	if (stio->lines_left >= 0 && stio->page > 0)
	    (void)putc('\f',ofp);
	stio->lines_left = stio->page_len;
	stio->page++;
	format(&toprec,stab_form(stio->top_stab),sp);
	fputs(toprec.o_str,ofp);
	stio->lines_left -= toprec.o_lines;
    }
  forget_top:
    fputs(orec->o_str,ofp);
    stio->lines_left -= orec->o_lines;
}
Commit	Line	Data
154e51a4	1	/* $Header: form.c,v 3.0.1.2 90/08/09 03:38:40 lwall Locked $
a687059c	2	*
	3	* Copyright (c) 1989, Larry Wall
	4	*
	5	* You may distribute under the terms of the GNU General Public License
	6	* as specified in the README file that comes with the perl 3.0 kit.
8d063cd8	7	*
8d063cd8	8	* $Log: form.c,v $
154e51a4	9	* Revision 3.0.1.2 90/08/09 03:38:40 lwall
	10	* patch19: did preliminary work toward debugging packages and evals
	11	*
ac58e20f	12	* Revision 3.0.1.1 90/02/28 17:39:34 lwall
	13	* patch9: ... in format threw off subsequent field
	14	*
a687059c	15	* Revision 3.0 89/10/18 15:17:26 lwall
a687059c	16	* 3.0 baseline
8d063cd8	17	*
	18	*/
	19
8d063cd8	20	#include "EXTERN.h"
8d063cd8	21	#include "perl.h"
	22
	23	/* Forms stuff */
	24
a687059c	25	void
	26	form_parseargs(fcmd)
	27	register FCMD *fcmd;
	28	{
	29	register int i;
	30	register ARG *arg;
	31	register int items;
	32	STR *str;
	33	ARG *parselist();
154e51a4	34	line_t oldline = curcmd->c_line;
a687059c	35	int oldsave = savestack->ary_fill;
	36
	37	str = fcmd->f_unparsed;
154e51a4	38	curcmd->c_line = fcmd->f_line;
a687059c	39	fcmd->f_unparsed = Nullstr;
	40	(void)savehptr(&curstash);
	41	curstash = str->str_u.str_hash;
	42	arg = parselist(str);
	43	restorelist(oldsave);
	44
	45	items = arg->arg_len - 1; /* ignore $$ on end */
	46	for (i = 1; i <= items; i++) {
	47	if (!fcmd \|\| fcmd->f_type == F_NULL)
	48	fatal("Too many field values");
	49	dehoist(arg,i);
	50	fcmd->f_expr = make_op(O_ITEM,1,
	51	arg[i].arg_ptr.arg_arg,Nullarg,Nullarg);
	52	if (fcmd->f_flags & FC_CHOP) {
	53	if ((fcmd->f_expr[1].arg_type & A_MASK) == A_STAB)
	54	fcmd->f_expr[1].arg_type = A_LVAL;
	55	else if ((fcmd->f_expr[1].arg_type & A_MASK) == A_EXPR)
	56	fcmd->f_expr[1].arg_type = A_LEXPR;
	57	else
	58	fatal("^ field requires scalar lvalue");
	59	}
	60	fcmd = fcmd->f_next;
	61	}
	62	if (fcmd && fcmd->f_type)
	63	fatal("Not enough field values");
154e51a4	64	curcmd->c_line = oldline;
a687059c	65	Safefree(arg);
	66	str_free(str);
	67	}
	68
	69	int newsize;
	70
8d063cd8	71	#define CHKLEN(allow) \
a687059c	72	newsize = (d - orec->o_str) + (allow); \
a687059c	73	if (newsize >= curlen) { \
8d063cd8	74	curlen = d - orec->o_str; \
	75	GROWSTR(&orec->o_str,&orec->o_len,orec->o_len + (allow)); \
	76	d = orec->o_str + curlen; /* in case it moves */ \
	77	curlen = orec->o_len - 2; \
	78	}
	79
a687059c	80	format(orec,fcmd,sp)
8d063cd8	81	register struct outrec *orec;
8d063cd8	82	register FCMD *fcmd;
a687059c	83	int sp;
8d063cd8	84	{
	85	register char *d = orec->o_str;
	86	register char *s;
	87	register int curlen = orec->o_len - 2;
	88	register int size;
a687059c	89	FCMD *nextfcmd;
a687059c	90	FCMD *linebeg = fcmd;
8d063cd8	91	char tmpchar;
	92	char *t;
	93	CMD mycmd;
	94	STR *str;
	95	char *chophere;
	96
	97	mycmd.c_type = C_NULL;
	98	orec->o_lines = 0;
a687059c	99	for (; fcmd; fcmd = nextfcmd) {
a687059c	100	nextfcmd = fcmd->f_next;
8d063cd8	101	CHKLEN(fcmd->f_presize);
a687059c	102	if (s = fcmd->f_pre) {
	103	while (*s) {
	104	if (*s == '\n') {
	105	while (d > orec->o_str && (d[-1] == ' ' \|\| d[-1] == '\t'))
	106	d--;
	107	if (fcmd->f_flags & FC_NOBLANK) {
	108	if (d == orec->o_str \|\| d[-1] == '\n') {
	109	orec->o_lines--; /* don't print blank line */
	110	linebeg = fcmd->f_next;
	111	break;
	112	}
	113	else if (fcmd->f_flags & FC_REPEAT)
	114	nextfcmd = linebeg;
	115	}
	116	else
	117	linebeg = fcmd->f_next;
8d063cd8	118	}
a687059c	119	d++ = s++;
8d063cd8	120	}
8d063cd8	121	}
a687059c	122	if (fcmd->f_unparsed)
a687059c	123	form_parseargs(fcmd);
8d063cd8	124	switch (fcmd->f_type) {
	125	case F_NULL:
	126	orec->o_lines++;
	127	break;
	128	case F_LEFT:
a687059c	129	(void)eval(fcmd->f_expr,G_SCALAR,sp);
a687059c	130	str = stack->ary_array[sp+1];
8d063cd8	131	s = str_get(str);
	132	size = fcmd->f_size;
	133	CHKLEN(size);
	134	chophere = Nullch;
	135	while (size && s && s != '\n') {
a687059c	136	if (*s == '\t')
a687059c	137	*s = ' ';
8d063cd8	138	size--;
a687059c	139	if (s && index(chopset,(d++ = *s++)))
8d063cd8	140	chophere = s;
a687059c	141	if (*s == '\n' && (fcmd->f_flags & FC_CHOP))
a687059c	142	*s = ' ';
8d063cd8	143	}
	144	if (size)
	145	chophere = s;
a687059c	146	else if (chophere && chophere < s && s && index(chopset,s))
a687059c	147	chophere = s;
8d063cd8	148	if (fcmd->f_flags & FC_CHOP) {
	149	if (!chophere)
	150	chophere = s;
	151	size += (s - chophere);
	152	d -= (s - chophere);
	153	if (fcmd->f_flags & FC_MORE &&
	154	*chophere && strNE(chophere,"\n")) {
	155	while (size < 3) {
	156	d--;
	157	size++;
	158	}
	159	while (d[-1] == ' ' && size < fcmd->f_size) {
	160	d--;
	161	size++;
	162	}
	163	*d++ = '.';
	164	*d++ = '.';
	165	*d++ = '.';
ac58e20f	166	size -= 3;
8d063cd8	167	}
a687059c	168	while (chophere && index(chopset,chophere))
a687059c	169	chophere++;
8d063cd8	170	str_chop(str,chophere);
	171	}
	172	if (fcmd->f_next && fcmd->f_next->f_pre[0] == '\n')
	173	size = 0; /* no spaces before newline */
	174	while (size) {
	175	size--;
	176	*d++ = ' ';
	177	}
	178	break;
	179	case F_RIGHT:
a687059c	180	(void)eval(fcmd->f_expr,G_SCALAR,sp);
	181	str = stack->ary_array[sp+1];
	182	t = s = str_get(str);
8d063cd8	183	size = fcmd->f_size;
	184	CHKLEN(size);
	185	chophere = Nullch;
	186	while (size && s && s != '\n') {
a687059c	187	if (*s == '\t')
a687059c	188	*s = ' ';
8d063cd8	189	size--;
a687059c	190	if (s && index(chopset,s++))
	191	chophere = s;
	192	if (*s == '\n' && (fcmd->f_flags & FC_CHOP))
	193	*s = ' ';
8d063cd8	194	}
	195	if (size)
	196	chophere = s;
a687059c	197	else if (chophere && chophere < s && s && index(chopset,s))
a687059c	198	chophere = s;
8d063cd8	199	if (fcmd->f_flags & FC_CHOP) {
	200	if (!chophere)
	201	chophere = s;
	202	size += (s - chophere);
8d063cd8	203	s = chophere;
a687059c	204	while (chophere && index(chopset,chophere))
a687059c	205	chophere++;
8d063cd8	206	}
	207	tmpchar = *s;
	208	*s = '\0';
	209	while (size) {
	210	size--;
	211	*d++ = ' ';
	212	}
	213	size = s - t;
a687059c	214	(void)bcopy(t,d,size);
8d063cd8	215	d += size;
8d063cd8	216	*s = tmpchar;
a687059c	217	if (fcmd->f_flags & FC_CHOP)
a687059c	218	str_chop(str,chophere);
8d063cd8	219	break;
	220	case F_CENTER: {
	221	int halfsize;
	222
a687059c	223	(void)eval(fcmd->f_expr,G_SCALAR,sp);
	224	str = stack->ary_array[sp+1];
	225	t = s = str_get(str);
8d063cd8	226	size = fcmd->f_size;
	227	CHKLEN(size);
	228	chophere = Nullch;
	229	while (size && s && s != '\n') {
a687059c	230	if (*s == '\t')
a687059c	231	*s = ' ';
8d063cd8	232	size--;
a687059c	233	if (s && index(chopset,s++))
	234	chophere = s;
	235	if (*s == '\n' && (fcmd->f_flags & FC_CHOP))
	236	*s = ' ';
8d063cd8	237	}
	238	if (size)
	239	chophere = s;
a687059c	240	else if (chophere && chophere < s && s && index(chopset,s))
a687059c	241	chophere = s;
8d063cd8	242	if (fcmd->f_flags & FC_CHOP) {
	243	if (!chophere)
	244	chophere = s;
	245	size += (s - chophere);
8d063cd8	246	s = chophere;
a687059c	247	while (chophere && index(chopset,chophere))
a687059c	248	chophere++;
8d063cd8	249	}
	250	tmpchar = *s;
	251	*s = '\0';
	252	halfsize = size / 2;
	253	while (size > halfsize) {
	254	size--;
	255	*d++ = ' ';
	256	}
	257	size = s - t;
a687059c	258	(void)bcopy(t,d,size);
8d063cd8	259	d += size;
	260	*s = tmpchar;
	261	if (fcmd->f_next && fcmd->f_next->f_pre[0] == '\n')
	262	size = 0; /* no spaces before newline */
	263	else
	264	size = halfsize;
	265	while (size) {
	266	size--;
	267	*d++ = ' ';
	268	}
a687059c	269	if (fcmd->f_flags & FC_CHOP)
a687059c	270	str_chop(str,chophere);
8d063cd8	271	break;
	272	}
	273	case F_LINES:
a687059c	274	(void)eval(fcmd->f_expr,G_SCALAR,sp);
a687059c	275	str = stack->ary_array[sp+1];
8d063cd8	276	s = str_get(str);
	277	size = str_len(str);
	278	CHKLEN(size);
	279	orec->o_lines += countlines(s);
a687059c	280	(void)bcopy(s,d,size);
8d063cd8	281	d += size;
a687059c	282	linebeg = fcmd->f_next;
8d063cd8	283	break;
	284	}
	285	}
154e51a4	286	CHKLEN(1);
8d063cd8	287	*d++ = '\0';
	288	}
	289
	290	countlines(s)
	291	register char *s;
	292	{
	293	register int count = 0;
	294
	295	while (*s) {
	296	if (*s++ == '\n')
	297	count++;
	298	}
	299	return count;
	300	}
	301
a687059c	302	do_write(orec,stio,sp)
8d063cd8	303	struct outrec *orec;
8d063cd8	304	register STIO *stio;
a687059c	305	int sp;
8d063cd8	306	{
a687059c	307	FILE *ofp = stio->ofp;
8d063cd8	308
	309	#ifdef DEBUGGING
	310	if (debug & 256)
378cc40b	311	fprintf(stderr,"left=%ld, todo=%ld\n",
378cc40b	312	(long)stio->lines_left, (long)orec->o_lines);
8d063cd8	313	#endif
	314	if (stio->lines_left < orec->o_lines) {
	315	if (!stio->top_stab) {
	316	STAB *topstab;
	317
	318	if (!stio->top_name)
	319	stio->top_name = savestr("top");
	320	topstab = stabent(stio->top_name,FALSE);
a687059c	321	if (!topstab \|\| !stab_form(topstab)) {
8d063cd8	322	stio->lines_left = 100000000;
	323	goto forget_top;
	324	}
	325	stio->top_stab = topstab;
	326	}
a687059c	327	if (stio->lines_left >= 0 && stio->page > 0)
a687059c	328	(void)putc('\f',ofp);
8d063cd8	329	stio->lines_left = stio->page_len;
8d063cd8	330	stio->page++;
a687059c	331	format(&toprec,stab_form(stio->top_stab),sp);
8d063cd8	332	fputs(toprec.o_str,ofp);
	333	stio->lines_left -= toprec.o_lines;
	334	}
	335	forget_top:
	336	fputs(orec->o_str,ofp);
	337	stio->lines_left -= orec->o_lines;
	338	}