[dragonfly.git] / usr.bin / mandoc / html.c

/*	$Id: html.c,v 1.80 2009/11/02 06:22:44 kristaps Exp $ */
/*
 * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "out.h"
#include "chars.h"
#include "html.h"
#include "main.h"

#define	UNCONST(a)	((void *)(uintptr_t)(const void *)(a))

#define	DOCTYPE		"-//W3C//DTD HTML 4.01//EN"
#define	DTD		"http://www.w3.org/TR/html4/strict.dtd"

struct	htmldata {
	const char	 *name;
	int		  flags;
#define	HTML_CLRLINE	 (1 << 0)
#define	HTML_NOSTACK	 (1 << 1)
};

static	const struct htmldata htmltags[TAG_MAX] = {
	{"html",	HTML_CLRLINE}, /* TAG_HTML */
	{"head",	HTML_CLRLINE}, /* TAG_HEAD */
	{"body",	HTML_CLRLINE}, /* TAG_BODY */
	{"meta",	HTML_CLRLINE | HTML_NOSTACK}, /* TAG_META */
	{"title",	HTML_CLRLINE}, /* TAG_TITLE */
	{"div",		HTML_CLRLINE}, /* TAG_DIV */
	{"h1",		0}, /* TAG_H1 */
	{"h2",		0}, /* TAG_H2 */
	{"p",		HTML_CLRLINE}, /* TAG_P */
	{"span",	0}, /* TAG_SPAN */
	{"link",	HTML_CLRLINE | HTML_NOSTACK}, /* TAG_LINK */
	{"br",		HTML_CLRLINE | HTML_NOSTACK}, /* TAG_LINK */
	{"a",		0}, /* TAG_A */
	{"table",	HTML_CLRLINE}, /* TAG_TABLE */
	{"col",		HTML_CLRLINE | HTML_NOSTACK}, /* TAG_COL */
	{"tr",		HTML_CLRLINE}, /* TAG_TR */
	{"td",		HTML_CLRLINE}, /* TAG_TD */
	{"li",		HTML_CLRLINE}, /* TAG_LI */
	{"ul",		HTML_CLRLINE}, /* TAG_UL */
	{"ol",		HTML_CLRLINE}, /* TAG_OL */
	{"base",	HTML_CLRLINE | HTML_NOSTACK}, /* TAG_BASE */
};

static	const char	 *const htmlattrs[ATTR_MAX] = {
	"http-equiv",
	"content",
	"name",
	"rel",
	"href",
	"type",
	"media",
	"class",
	"style",
	"width",
	"valign",
	"target",
	"id",
	"summary",
};

#ifdef __linux__
extern	int		  getsubopt(char **, char * const *, char **);
#endif

void *
html_alloc(char *outopts)
{
	struct html	*h;
	const char	*toks[4];
	char		*v;

	toks[0] = "style";
	toks[1] = "man";
	toks[2] = "includes";
	toks[3] = NULL;

	h = calloc(1, sizeof(struct html));
	if (NULL == h) {
		perror(NULL);
		exit(EXIT_FAILURE);
	}

	h->tags.head = NULL;
	h->ords.head = NULL;
	h->symtab = chars_init(CHARS_HTML);

	while (outopts && *outopts)
		switch (getsubopt(&outopts, UNCONST(toks), &v)) {
		case (0):
			h->style = v;
			break;
		case (1):
			h->base_man = v;
			break;
		case (2):
			h->base_includes = v;
			break;
		default:
			break;
		}

	return(h);
}


void
html_free(void *p)
{
	struct tag	*tag;
	struct ord	*ord;
	struct html	*h;

	h = (struct html *)p;

	while ((ord = h->ords.head) != NULL) {
		h->ords.head = ord->next;
		free(ord);
	}

	while ((tag = h->tags.head) != NULL) {
		h->tags.head = tag->next;
		free(tag);
	}

	if (h->symtab)
		chars_free(h->symtab);

	free(h);
}


void
print_gen_head(struct html *h)
{
	struct htmlpair	 tag[4];

	tag[0].key = ATTR_HTTPEQUIV;
	tag[0].val = "Content-Type";
	tag[1].key = ATTR_CONTENT;
	tag[1].val = "text/html; charset=utf-8";
	print_otag(h, TAG_META, 2, tag);

	tag[0].key = ATTR_NAME;
	tag[0].val = "resource-type";
	tag[1].key = ATTR_CONTENT;
	tag[1].val = "document";
	print_otag(h, TAG_META, 2, tag);

	if (h->style) {
		tag[0].key = ATTR_REL;
		tag[0].val = "stylesheet";
		tag[1].key = ATTR_HREF;
		tag[1].val = h->style;
		tag[2].key = ATTR_TYPE;
		tag[2].val = "text/css";
		tag[3].key = ATTR_MEDIA;
		tag[3].val = "all";
		print_otag(h, TAG_LINK, 4, tag);
	}
}


static void
print_spec(struct html *h, const char *p, int len)
{
	const char	*rhs;
	size_t		 sz;

	rhs = chars_a2ascii(h->symtab, p, (size_t)len, &sz);

	if (NULL == rhs)
		return;
	fwrite(rhs, 1, sz, stdout);
}


static void
print_res(struct html *h, const char *p, int len)
{
	const char	*rhs;
	size_t		 sz;

	rhs = chars_a2res(h->symtab, p, (size_t)len, &sz);

	if (NULL == rhs)
		return;
	fwrite(rhs, 1, sz, stdout);
}


static void
print_escape(struct html *h, const char **p)
{
	int		 j, type;
	const char	*wp;

	wp = *p;
	type = 1;

	if (0 == *(++wp)) {
		*p = wp;
		return;
	}

	if ('(' == *wp) {
		wp++;
		if (0 == *wp || 0 == *(wp + 1)) {
			*p = 0 == *wp ? wp : wp + 1;
			return;
		}

		print_spec(h, wp, 2);
		*p = ++wp;
		return;

	} else if ('*' == *wp) {
		if (0 == *(++wp)) {
			*p = wp;
			return;
		}

		switch (*wp) {
		case ('('):
			wp++;
			if (0 == *wp || 0 == *(wp + 1)) {
				*p = 0 == *wp ? wp : wp + 1;
				return;
			}

			print_res(h, wp, 2);
			*p = ++wp;
			return;
		case ('['):
			type = 0;
			break;
		default:
			print_res(h, wp, 1);
			*p = wp;
			return;
		}

	} else if ('f' == *wp) {
		if (0 == *(++wp)) {
			*p = wp;
			return;
		}

		switch (*wp) {
		case ('B'):
			/* TODO */
			break;
		case ('I'):
			/* TODO */
			break;
		case ('P'):
			/* FALLTHROUGH */
		case ('R'):
			/* TODO */
			break;
		default:
			break;
		}

		*p = wp;
		return;

	} else if ('[' != *wp) {
		print_spec(h, wp, 1);
		*p = wp;
		return;
	}

	wp++;
	for (j = 0; *wp && ']' != *wp; wp++, j++)
		/* Loop... */ ;

	if (0 == *wp) {
		*p = wp;
		return;
	}

	if (type)
		print_spec(h, wp - j, j);
	else
		print_res(h, wp - j, j);

	*p = wp;
}


static void
print_encode(struct html *h, const char *p)
{
	size_t		 sz;

	for (; *p; p++) {
		sz = strcspn(p, "\\<>&");

		fwrite(p, 1, sz, stdout);
		p += /* LINTED */
			sz;

		if ('\\' == *p) {
			print_escape(h, &p);
			continue;
		} else if ('\0' == *p)
			break;

		if ('<' == *p)
			printf("&lt;");
		else if ('>' == *p)
			printf("&gt;");
		else if ('&' == *p)
			printf("&amp;");
	}
}


struct tag *
print_otag(struct html *h, enum htmltag tag,
		int sz, const struct htmlpair *p)
{
	int		 i;
	struct tag	*t;

	if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
		t = malloc(sizeof(struct tag));
		if (NULL == t) {
			perror(NULL);
			exit(EXIT_FAILURE);
		}
		t->tag = tag;
		t->next = h->tags.head;
		h->tags.head = t;
	} else
		t = NULL;

	if ( ! (HTML_NOSPACE & h->flags))
		if ( ! (HTML_CLRLINE & htmltags[tag].flags))
			putchar(' ');

	printf("<%s", htmltags[tag].name);
	for (i = 0; i < sz; i++) {
		printf(" %s=\"", htmlattrs[p[i].key]);
		assert(p->val);
		print_encode(h, p[i].val);
		putchar('\"');
	}
	putchar('>');

	h->flags |= HTML_NOSPACE;
	if (HTML_CLRLINE & htmltags[tag].flags)
		h->flags |= HTML_NEWLINE;
	else
		h->flags &= ~HTML_NEWLINE;

	return(t);
}


/* ARGSUSED */
static void
print_ctag(struct html *h, enum htmltag tag)
{

	printf("</%s>", htmltags[tag].name);
	if (HTML_CLRLINE & htmltags[tag].flags) {
		h->flags |= HTML_NOSPACE;
		h->flags |= HTML_NEWLINE;
		putchar('\n');
	} else
		h->flags &= ~HTML_NEWLINE;
}


/* ARGSUSED */
void
print_gen_doctype(struct html *h)
{

	printf("<!DOCTYPE HTML PUBLIC \"%s\" \"%s\">", DOCTYPE, DTD);
}


void
print_text(struct html *h, const char *p)
{

	if (*p && 0 == *(p + 1))
		switch (*p) {
		case('.'):
			/* FALLTHROUGH */
		case(','):
			/* FALLTHROUGH */
		case(';'):
			/* FALLTHROUGH */
		case(':'):
			/* FALLTHROUGH */
		case('?'):
			/* FALLTHROUGH */
		case('!'):
			/* FALLTHROUGH */
		case(')'):
			/* FALLTHROUGH */
		case(']'):
			/* FALLTHROUGH */
		case('}'):
			if ( ! (HTML_IGNDELIM & h->flags))
				h->flags |= HTML_NOSPACE;
			break;
		default:
			break;
		}

	if ( ! (h->flags & HTML_NOSPACE))
		putchar(' ');

	h->flags &= ~HTML_NOSPACE;
	h->flags &= ~HTML_NEWLINE;

	if (p)
		print_encode(h, p);

	if (*p && 0 == *(p + 1))
		switch (*p) {
		case('('):
			/* FALLTHROUGH */
		case('['):
			/* FALLTHROUGH */
		case('{'):
			h->flags |= HTML_NOSPACE;
			break;
		default:
			break;
		}
}


void
print_tagq(struct html *h, const struct tag *until)
{
	struct tag	*tag;

	while ((tag = h->tags.head) != NULL) {
		print_ctag(h, tag->tag);
		h->tags.head = tag->next;
		free(tag);
		if (until && tag == until)
			return;
	}
}


void
print_stagq(struct html *h, const struct tag *suntil)
{
	struct tag	*tag;

	while ((tag = h->tags.head) != NULL) {
		if (suntil && tag == suntil)
			return;
		print_ctag(h, tag->tag);
		h->tags.head = tag->next;
		free(tag);
	}
}


void
bufinit(struct html *h)
{

	h->buf[0] = '\0';
	h->buflen = 0;
}


void
bufcat_style(struct html *h, const char *key, const char *val)
{

	bufcat(h, key);
	bufncat(h, ":", 1);
	bufcat(h, val);
	bufncat(h, ";", 1);
}


void
bufcat(struct html *h, const char *p)
{

	bufncat(h, p, strlen(p));
}


void
buffmt(struct html *h, const char *fmt, ...)
{
	va_list		 ap;

	va_start(ap, fmt);
	(void)vsnprintf(h->buf + (int)h->buflen,
			BUFSIZ - h->buflen - 1, fmt, ap);
	va_end(ap);
	h->buflen = strlen(h->buf);
}


void
bufncat(struct html *h, const char *p, size_t sz)
{

	if (h->buflen + sz > BUFSIZ - 1)
		sz = BUFSIZ - 1 - h->buflen;

	(void)strncat(h->buf, p, sz);
	h->buflen += sz;
}


void
buffmt_includes(struct html *h, const char *name)
{
	const char	*p, *pp;

	pp = h->base_includes;

	while (NULL != (p = strchr(pp, '%'))) {
		bufncat(h, pp, (size_t)(p - pp));
		switch (*(p + 1)) {
		case('I'):
			bufcat(h, name);
			break;
		default:
			bufncat(h, p, 2);
			break;
		}
		pp = p + 2;
	}
	if (pp)
		bufcat(h, pp);
}


void
buffmt_man(struct html *h,
		const char *name, const char *sec)
{
	const char	*p, *pp;

	pp = h->base_man;

	/* LINTED */
	while (NULL != (p = strchr(pp, '%'))) {
		bufncat(h, pp, (size_t)(p - pp));
		switch (*(p + 1)) {
		case('S'):
			bufcat(h, sec ? sec : "1");
			break;
		case('N'):
			buffmt(h, name);
			break;
		default:
			bufncat(h, p, 2);
			break;
		}
		pp = p + 2;
	}
	if (pp)
		bufcat(h, pp);
}


void
bufcat_su(struct html *h, const char *p, const struct roffsu *su)
{
	double		 v;
	const char	*u;

	v = su->scale;

	switch (su->unit) {
	case (SCALE_CM):
		u = "cm";
		break;
	case (SCALE_IN):
		u = "in";
		break;
	case (SCALE_PC):
		u = "pc";
		break;
	case (SCALE_PT):
		u = "pt";
		break;
	case (SCALE_EM):
		u = "em";
		break;
	case (SCALE_MM):
		if (0 == (v /= 100))
			v = 1;
		u = "em";
		break;
	case (SCALE_EN):
		u = "ex";
		break;
	case (SCALE_BU):
		u = "ex";
		break;
	case (SCALE_VS):
		u = "em";
		break;
	default:
		u = "ex";
		break;
	}

	if (su->pt)
		buffmt(h, "%s: %f%s;", p, v, u);
	else
		/* LINTED */
		buffmt(h, "%s: %d%s;", p, (int)v, u);
}


void
html_idcat(char *dst, const char *src, int sz)
{
	int		 ssz;

	assert(sz);

	/* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */

	for ( ; *dst != '\0' && sz; dst++, sz--)
		/* Jump to end. */ ;

	assert(sz > 2);

	/* We can't start with a number (bah). */

	*dst++ = 'x';
	*dst = '\0';
	sz--;

	for ( ; *src != '\0' && sz > 1; src++) {
		ssz = snprintf(dst, (size_t)sz, "%.2x", *src);
		sz -= ssz;
		dst += ssz;
	}
}
Commit	Line	Data
32c903ac	1	/* $Id: html.c,v 1.80 2009/11/02 06:22:44 kristaps Exp $ */
589e7c1d SW	2	/*
	3	* Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
	4	*
	5	* Permission to use, copy, modify, and distribute this software for any
	6	* purpose with or without fee is hereby granted, provided that the above
	7	* copyright notice and this permission notice appear in all copies.
	8	*
	9	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	10	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	11	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	12	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	13	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	14	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	15	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	16	*/
	17	#include <sys/types.h>
589e7c1d SW	18
589e7c1d SW	19	#include <assert.h>
32c903ac	20	#include <ctype.h>
589e7c1d	21	#include <stdarg.h>
32c903ac	22	#include <stdio.h>
589e7c1d SW	23	#include <stdint.h>
	24	#include <stdlib.h>
	25	#include <string.h>
	26	#include <unistd.h>
	27
	28	#include "out.h"
	29	#include "chars.h"
	30	#include "html.h"
	31	#include "main.h"
	32
	33	#define UNCONST(a) ((void )(uintptr_t)(const void )(a))
	34
	35	#define DOCTYPE "-//W3C//DTD HTML 4.01//EN"
	36	#define DTD "http://www.w3.org/TR/html4/strict.dtd"
	37
	38	struct htmldata {
	39	const char *name;
	40	int flags;
	41	#define HTML_CLRLINE (1 << 0)
	42	#define HTML_NOSTACK (1 << 1)
	43	};
	44
	45	static const struct htmldata htmltags[TAG_MAX] = {
	46	{"html", HTML_CLRLINE}, /* TAG_HTML */
	47	{"head", HTML_CLRLINE}, /* TAG_HEAD */
	48	{"body", HTML_CLRLINE}, /* TAG_BODY */
	49	{"meta", HTML_CLRLINE \| HTML_NOSTACK}, /* TAG_META */
	50	{"title", HTML_CLRLINE}, /* TAG_TITLE */
	51	{"div", HTML_CLRLINE}, /* TAG_DIV */
	52	{"h1", 0}, /* TAG_H1 */
	53	{"h2", 0}, /* TAG_H2 */
	54	{"p", HTML_CLRLINE}, /* TAG_P */
	55	{"span", 0}, /* TAG_SPAN */
	56	{"link", HTML_CLRLINE \| HTML_NOSTACK}, /* TAG_LINK */
	57	{"br", HTML_CLRLINE \| HTML_NOSTACK}, /* TAG_LINK */
	58	{"a", 0}, /* TAG_A */
	59	{"table", HTML_CLRLINE}, /* TAG_TABLE */
	60	{"col", HTML_CLRLINE \| HTML_NOSTACK}, /* TAG_COL */
	61	{"tr", HTML_CLRLINE}, /* TAG_TR */
	62	{"td", HTML_CLRLINE}, /* TAG_TD */
	63	{"li", HTML_CLRLINE}, /* TAG_LI */
	64	{"ul", HTML_CLRLINE}, /* TAG_UL */
	65	{"ol", HTML_CLRLINE}, /* TAG_OL */
	66	{"base", HTML_CLRLINE \| HTML_NOSTACK}, /* TAG_BASE */
	67	};
	68
	69	static const char *const htmlattrs[ATTR_MAX] = {
	70	"http-equiv",
	71	"content",
	72	"name",
	73	"rel",
	74	"href",
	75	"type",
	76	"media",
	77	"class",
	78	"style",
	79	"width",
	80	"valign",
	81	"target",
	82	"id",
32c903ac	83	"summary",
589e7c1d SW	84	};
589e7c1d SW	85
32c903ac SW	86	#ifdef __linux__
	87	extern int getsubopt(char *, char const , char *);
	88	#endif
	89
589e7c1d SW	90	void *
	91	html_alloc(char *outopts)
	92	{
	93	struct html *h;
	94	const char *toks[4];
	95	char *v;
	96
	97	toks[0] = "style";
	98	toks[1] = "man";
	99	toks[2] = "includes";
	100	toks[3] = NULL;
	101
32c903ac SW	102	h = calloc(1, sizeof(struct html));
	103	if (NULL == h) {
	104	perror(NULL);
	105	exit(EXIT_FAILURE);
	106	}
589e7c1d	107
cbce6d97 SW	108	h->tags.head = NULL;
cbce6d97 SW	109	h->ords.head = NULL;
32c903ac	110	h->symtab = chars_init(CHARS_HTML);
589e7c1d SW	111
	112	while (outopts && *outopts)
	113	switch (getsubopt(&outopts, UNCONST(toks), &v)) {
	114	case (0):
	115	h->style = v;
	116	break;
	117	case (1):
	118	h->base_man = v;
	119	break;
	120	case (2):
	121	h->base_includes = v;
	122	break;
	123	default:
	124	break;
	125	}
	126
	127	return(h);
	128	}
	129
	130
	131	void
	132	html_free(void *p)
	133	{
	134	struct tag *tag;
	135	struct ord *ord;
	136	struct html *h;
	137
	138	h = (struct html *)p;
	139
cbce6d97 SW	140	while ((ord = h->ords.head) != NULL) {
cbce6d97 SW	141	h->ords.head = ord->next;
589e7c1d SW	142	free(ord);
	143	}
	144
cbce6d97 SW	145	while ((tag = h->tags.head) != NULL) {
cbce6d97 SW	146	h->tags.head = tag->next;
589e7c1d SW	147	free(tag);
	148	}
	149
	150	if (h->symtab)
	151	chars_free(h->symtab);
	152
	153	free(h);
	154	}
	155
	156
	157	void
	158	print_gen_head(struct html *h)
	159	{
	160	struct htmlpair tag[4];
	161
	162	tag[0].key = ATTR_HTTPEQUIV;
	163	tag[0].val = "Content-Type";
	164	tag[1].key = ATTR_CONTENT;
	165	tag[1].val = "text/html; charset=utf-8";
	166	print_otag(h, TAG_META, 2, tag);
	167
	168	tag[0].key = ATTR_NAME;
	169	tag[0].val = "resource-type";
	170	tag[1].key = ATTR_CONTENT;
	171	tag[1].val = "document";
	172	print_otag(h, TAG_META, 2, tag);
	173
	174	if (h->style) {
	175	tag[0].key = ATTR_REL;
	176	tag[0].val = "stylesheet";
	177	tag[1].key = ATTR_HREF;
	178	tag[1].val = h->style;
	179	tag[2].key = ATTR_TYPE;
	180	tag[2].val = "text/css";
	181	tag[3].key = ATTR_MEDIA;
	182	tag[3].val = "all";
	183	print_otag(h, TAG_LINK, 4, tag);
	184	}
	185	}
	186
	187
	188	static void
	189	print_spec(struct html h, const char p, int len)
	190	{
	191	const char *rhs;
589e7c1d SW	192	size_t sz;
	193
	194	rhs = chars_a2ascii(h->symtab, p, (size_t)len, &sz);
	195
	196	if (NULL == rhs)
	197	return;
32c903ac	198	fwrite(rhs, 1, sz, stdout);
589e7c1d SW	199	}
	200
	201
	202	static void
	203	print_res(struct html h, const char p, int len)
	204	{
	205	const char *rhs;
589e7c1d SW	206	size_t sz;
	207
	208	rhs = chars_a2res(h->symtab, p, (size_t)len, &sz);
	209
	210	if (NULL == rhs)
	211	return;
32c903ac	212	fwrite(rhs, 1, sz, stdout);
589e7c1d SW	213	}
	214
	215
	216	static void
	217	print_escape(struct html h, const char *p)
	218	{
	219	int j, type;
	220	const char *wp;
	221
	222	wp = *p;
	223	type = 1;
	224
	225	if (0 == *(++wp)) {
	226	*p = wp;
	227	return;
	228	}
	229
	230	if ('(' == *wp) {
	231	wp++;
	232	if (0 == wp \|\| 0 == (wp + 1)) {
	233	p = 0 == wp ? wp : wp + 1;
	234	return;
	235	}
	236
	237	print_spec(h, wp, 2);
	238	*p = ++wp;
	239	return;
	240
	241	} else if ('' == wp) {
	242	if (0 == *(++wp)) {
	243	*p = wp;
	244	return;
	245	}
	246
	247	switch (*wp) {
	248	case ('('):
	249	wp++;
	250	if (0 == wp \|\| 0 == (wp + 1)) {
	251	p = 0 == wp ? wp : wp + 1;
	252	return;
	253	}
	254
	255	print_res(h, wp, 2);
	256	*p = ++wp;
	257	return;
	258	case ('['):
	259	type = 0;
	260	break;
	261	default:
	262	print_res(h, wp, 1);
	263	*p = wp;
	264	return;
	265	}
	266
	267	} else if ('f' == *wp) {
	268	if (0 == *(++wp)) {
	269	*p = wp;
	270	return;
	271	}
	272
	273	switch (*wp) {
	274	case ('B'):
	275	/* TODO */
	276	break;
277	case ('I'):
278	/* TODO */
279	break;
280	case ('P'):
281	/* FALLTHROUGH */
282	case ('R'):
283	/* TODO */
284	break;
285	default:
286	break;
287	}
288
289	*p = wp;
290	return;
291
292	} else if ('[' != *wp) {
293	print_spec(h, wp, 1);
294	*p = wp;
295	return;
296	}
297
298	wp++;
299	for (j = 0; wp && ']' != wp; wp++, j++)
300	/* Loop... */ ;
301
302	if (0 == *wp) {
303	*p = wp;
304	return;
305	}
306
307	if (type)
308	print_spec(h, wp - j, j);
309	else
310	print_res(h, wp - j, j);
311
312	*p = wp;
313	}
314
315
316	static void
317	print_encode(struct html h, const char p)
318	{
32c903ac	319	size_t sz;
589e7c1d SW	320
589e7c1d SW	321	for (; *p; p++) {
32c903ac SW	322	sz = strcspn(p, "\\<>&");
	323
	324	fwrite(p, 1, sz, stdout);
	325	p += /* LINTED */
	326	sz;
	327
589e7c1d SW	328	if ('\\' == *p) {
	329	print_escape(h, &p);
	330	continue;
32c903ac	331	} else if ('\0' == *p)
589e7c1d	332	break;
32c903ac SW	333
	334	if ('<' == *p)
	335	printf("<");
	336	else if ('>' == *p)
589e7c1d	337	printf(">");
32c903ac	338	else if ('&' == *p)
589e7c1d	339	printf("&");
589e7c1d SW	340	}
	341	}
	342
	343
	344	struct tag *
	345	print_otag(struct html *h, enum htmltag tag,
	346	int sz, const struct htmlpair *p)
	347	{
	348	int i;
	349	struct tag *t;
	350
	351	if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
32c903ac SW	352	t = malloc(sizeof(struct tag));
	353	if (NULL == t) {
	354	perror(NULL);
	355	exit(EXIT_FAILURE);
	356	}
589e7c1d	357	t->tag = tag;
cbce6d97 SW	358	t->next = h->tags.head;
cbce6d97 SW	359	h->tags.head = t;
589e7c1d SW	360	} else
	361	t = NULL;
	362
	363	if ( ! (HTML_NOSPACE & h->flags))
	364	if ( ! (HTML_CLRLINE & htmltags[tag].flags))
32c903ac	365	putchar(' ');
589e7c1d SW	366
	367	printf("<%s", htmltags[tag].name);
	368	for (i = 0; i < sz; i++) {
	369	printf(" %s=\"", htmlattrs[p[i].key]);
	370	assert(p->val);
	371	print_encode(h, p[i].val);
32c903ac	372	putchar('\"');
589e7c1d	373	}
32c903ac	374	putchar('>');
589e7c1d SW	375
	376	h->flags \|= HTML_NOSPACE;
	377	if (HTML_CLRLINE & htmltags[tag].flags)
	378	h->flags \|= HTML_NEWLINE;
	379	else
	380	h->flags &= ~HTML_NEWLINE;
	381
	382	return(t);
	383	}
	384
	385
	386	/* ARGSUSED */
	387	static void
	388	print_ctag(struct html *h, enum htmltag tag)
	389	{
	390
	391	printf("</%s>", htmltags[tag].name);
32c903ac	392	if (HTML_CLRLINE & htmltags[tag].flags) {
589e7c1d	393	h->flags \|= HTML_NOSPACE;
589e7c1d	394	h->flags \|= HTML_NEWLINE;
32c903ac SW	395	putchar('\n');
32c903ac SW	396	} else
589e7c1d SW	397	h->flags &= ~HTML_NEWLINE;
	398	}
	399
	400
	401	/* ARGSUSED */
	402	void
	403	print_gen_doctype(struct html *h)
	404	{
	405
	406	printf("<!DOCTYPE HTML PUBLIC \"%s\" \"%s\">", DOCTYPE, DTD);
	407	}
	408
	409
	410	void
	411	print_text(struct html h, const char p)
	412	{
	413
	414	if (p && 0 == (p + 1))
	415	switch (*p) {
	416	case('.'):
	417	/* FALLTHROUGH */
	418	case(','):
	419	/* FALLTHROUGH */
	420	case(';'):
	421	/* FALLTHROUGH */
	422	case(':'):
	423	/* FALLTHROUGH */
	424	case('?'):
	425	/* FALLTHROUGH */
	426	case('!'):
	427	/* FALLTHROUGH */
	428	case(')'):
	429	/* FALLTHROUGH */
	430	case(']'):
	431	/* FALLTHROUGH */
	432	case('}'):
	433	if ( ! (HTML_IGNDELIM & h->flags))
	434	h->flags \|= HTML_NOSPACE;
	435	break;
	436	default:
	437	break;
	438	}
	439
	440	if ( ! (h->flags & HTML_NOSPACE))
32c903ac	441	putchar(' ');
589e7c1d SW	442
	443	h->flags &= ~HTML_NOSPACE;
	444	h->flags &= ~HTML_NEWLINE;
	445
	446	if (p)
	447	print_encode(h, p);
	448
	449	if (p && 0 == (p + 1))
	450	switch (*p) {
	451	case('('):
	452	/* FALLTHROUGH */
	453	case('['):
	454	/* FALLTHROUGH */
	455	case('{'):
	456	h->flags \|= HTML_NOSPACE;
	457	break;
	458	default:
	459	break;
	460	}
	461	}
	462
	463
	464	void
	465	print_tagq(struct html h, const struct tag until)
	466	{
	467	struct tag *tag;
	468
cbce6d97	469	while ((tag = h->tags.head) != NULL) {
589e7c1d	470	print_ctag(h, tag->tag);
cbce6d97	471	h->tags.head = tag->next;
589e7c1d SW	472	free(tag);
	473	if (until && tag == until)
	474	return;
	475	}
	476	}
	477
	478
	479	void
	480	print_stagq(struct html h, const struct tag suntil)
	481	{
	482	struct tag *tag;
	483
cbce6d97	484	while ((tag = h->tags.head) != NULL) {
589e7c1d SW	485	if (suntil && tag == suntil)
	486	return;
	487	print_ctag(h, tag->tag);
cbce6d97	488	h->tags.head = tag->next;
589e7c1d SW	489	free(tag);
	490	}
	491	}
	492
	493
	494	void
	495	bufinit(struct html *h)
	496	{
	497
	498	h->buf[0] = '\0';
	499	h->buflen = 0;
	500	}
	501
	502
	503	void
	504	bufcat_style(struct html h, const char key, const char *val)
	505	{
	506
	507	bufcat(h, key);
	508	bufncat(h, ":", 1);
	509	bufcat(h, val);
	510	bufncat(h, ";", 1);
	511	}
	512
	513
	514	void
	515	bufcat(struct html h, const char p)
	516	{
	517
	518	bufncat(h, p, strlen(p));
	519	}
	520
	521
	522	void
	523	buffmt(struct html h, const char fmt, ...)
	524	{
	525	va_list ap;
	526
	527	va_start(ap, fmt);
	528	(void)vsnprintf(h->buf + (int)h->buflen,
	529	BUFSIZ - h->buflen - 1, fmt, ap);
	530	va_end(ap);
	531	h->buflen = strlen(h->buf);
	532	}
	533
	534
	535	void
	536	bufncat(struct html h, const char p, size_t sz)
	537	{
	538
	539	if (h->buflen + sz > BUFSIZ - 1)
	540	sz = BUFSIZ - 1 - h->buflen;
	541
	542	(void)strncat(h->buf, p, sz);
	543	h->buflen += sz;
	544	}
	545
	546
	547	void
	548	buffmt_includes(struct html h, const char name)
	549	{
	550	const char p, pp;
	551
	552	pp = h->base_includes;
553
554	while (NULL != (p = strchr(pp, '%'))) {
555	bufncat(h, pp, (size_t)(p - pp));
556	switch (*(p + 1)) {
557	case('I'):
558	bufcat(h, name);
559	break;
560	default:
561	bufncat(h, p, 2);
562	break;
563	}
564	pp = p + 2;
565	}
566	if (pp)
567	bufcat(h, pp);
568	}
569
570
571	void
572	buffmt_man(struct html *h,
573	const char name, const char sec)
574	{
575	const char p, pp;
576
577	pp = h->base_man;
578
579	/* LINTED */
580	while (NULL != (p = strchr(pp, '%'))) {
581	bufncat(h, pp, (size_t)(p - pp));
582	switch (*(p + 1)) {
583	case('S'):
584	bufcat(h, sec ? sec : "1");
585	break;
586	case('N'):
587	buffmt(h, name);
588	break;
589	default:
590	bufncat(h, p, 2);
591	break;
592	}
593	pp = p + 2;
594	}
595	if (pp)
596	bufcat(h, pp);
597	}
598
599
600	void
601	bufcat_su(struct html h, const char p, const struct roffsu *su)
602	{
603	double v;
604	const char *u;
605
606	v = su->scale;
607
608	switch (su->unit) {
609	case (SCALE_CM):
610	u = "cm";
611	break;
612	case (SCALE_IN):
613	u = "in";
614	break;
615	case (SCALE_PC):
616	u = "pc";
617	break;
618	case (SCALE_PT):
619	u = "pt";
620	break;
621	case (SCALE_EM):
622	u = "em";
623	break;
624	case (SCALE_MM):
625	if (0 == (v /= 100))
626	v = 1;
627	u = "em";
628	break;
629	case (SCALE_EN):
630	u = "ex";
631	break;
632	case (SCALE_BU):
633	u = "ex";
634	break;
635	case (SCALE_VS):
636	u = "em";
637	break;
638	default:
639	u = "ex";
640	break;
641	}
642
643	if (su->pt)
644	buffmt(h, "%s: %f%s;", p, v, u);
645	else
646	/* LINTED */
647	buffmt(h, "%s: %d%s;", p, (int)v, u);
648	}
32c903ac SW	649
	650
	651	void
	652	html_idcat(char dst, const char src, int sz)
	653	{
	654	int ssz;
	655
	656	assert(sz);
	657
	658	/* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */
	659
	660	for ( ; *dst != '\0' && sz; dst++, sz--)
	661	/* Jump to end. */ ;
	662
	663	assert(sz > 2);
	664
	665	/* We can't start with a number (bah). */
	666
	667	*dst++ = 'x';
	668	*dst = '\0';
	669	sz--;
	670
	671	for ( ; *src != '\0' && sz > 1; src++) {
	672	ssz = snprintf(dst, (size_t)sz, "%.2x", *src);
	673	sz -= ssz;
	674	dst += ssz;
	675	}
	676	}