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

/* $Header: form.c,v 3.0 89/10/18 15:17:26 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  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 = line;
    int oldsave = savestack->ary_fill;

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