Added man_action.c, renamed mdoc_action.c.

1 files changed, 713 insertions, 0 deletions

diff --git a/mdoc_action.c b/mdoc_action.c
new file mode 100644
index 00000000..bd4a5361
--- /dev/null
+++ b/mdoc_action.c
@@ -0,0 +1,713 @@
+/* $Id: mdoc_action.c,v 1.1 2009/03/25 15:36:05 kristaps Exp $ */
+/*
+ * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
+ *
+ * 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/utsname.h>
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libmdoc.h"
+
+/*
+ * Actions are executed on macros after they've been post-validated: in
+ * other words, a macro will not be "acted upon" until all of its
+ * children have been filled in (post-fix order).
+ */
+
+enum	mwarn {
+	WBADSEC,
+	WNOWIDTH,
+	WBADDATE
+};
+
+#define	PRE_ARGS  struct mdoc *m, const struct mdoc_node *n
+#define	POST_ARGS struct mdoc *m
+
+struct	actions {
+	int	(*pre)(PRE_ARGS);
+	int	(*post)(POST_ARGS);
+};
+
+static	int	  pwarn(struct mdoc *, int, int, enum mwarn);
+
+static	int	  post_ar(POST_ARGS);
+static	int	  post_bl(POST_ARGS);
+static	int	  post_bl_width(POST_ARGS);
+static	int	  post_bl_tagwidth(POST_ARGS);
+static	int	  post_dd(POST_ARGS);
+static	int	  post_display(POST_ARGS);
+static	int	  post_dt(POST_ARGS);
+static	int	  post_nm(POST_ARGS);
+static	int	  post_os(POST_ARGS);
+static	int	  post_prol(POST_ARGS);
+static	int	  post_sh(POST_ARGS);
+static	int	  post_std(POST_ARGS);
+
+static	int	  pre_bd(PRE_ARGS);
+static	int	  pre_dl(PRE_ARGS);
+
+#define	mwarn(m, t) pwarn((m), (m)->last->line, (m)->last->pos, (t))
+
+const	struct actions mdoc_actions[MDOC_MAX] = {
+	{ NULL, NULL }, /* \" */
+	{ NULL, post_dd }, /* Dd */ 
+	{ NULL, post_dt }, /* Dt */ 
+	{ NULL, post_os }, /* Os */ 
+	{ NULL, post_sh }, /* Sh */ 
+	{ NULL, NULL }, /* Ss */ 
+	{ NULL, NULL }, /* Pp */ 
+	{ NULL, NULL }, /* D1 */
+	{ pre_dl, post_display }, /* Dl */
+	{ pre_bd, post_display }, /* Bd */ 
+	{ NULL, NULL }, /* Ed */
+	{ NULL, post_bl }, /* Bl */ 
+	{ NULL, NULL }, /* El */
+	{ NULL, NULL }, /* It */
+	{ NULL, NULL }, /* Ad */ 
+	{ NULL, NULL }, /* An */
+	{ NULL, post_ar }, /* Ar */
+	{ NULL, NULL }, /* Cd */
+	{ NULL, NULL }, /* Cm */
+	{ NULL, NULL }, /* Dv */ 
+	{ NULL, NULL }, /* Er */ 
+	{ NULL, NULL }, /* Ev */ 
+	{ NULL, post_std }, /* Ex */
+	{ NULL, NULL }, /* Fa */ 
+	{ NULL, NULL }, /* Fd */ 
+	{ NULL, NULL }, /* Fl */
+	{ NULL, NULL }, /* Fn */ 
+	{ NULL, NULL }, /* Ft */ 
+	{ NULL, NULL }, /* Ic */ 
+	{ NULL, NULL }, /* In */ 
+	{ NULL, NULL }, /* Li */
+	{ NULL, NULL }, /* Nd */ 
+	{ NULL, post_nm }, /* Nm */ 
+	{ NULL, NULL }, /* Op */
+	{ NULL, NULL }, /* Ot */
+	{ NULL, NULL }, /* Pa */
+	{ NULL, post_std }, /* Rv */
+	{ NULL, NULL }, /* St */
+	{ NULL, NULL }, /* Va */
+	{ NULL, NULL }, /* Vt */ 
+	{ NULL, NULL }, /* Xr */
+	{ NULL, NULL }, /* %A */
+	{ NULL, NULL }, /* %B */
+	{ NULL, NULL }, /* %D */
+	{ NULL, NULL }, /* %I */
+	{ NULL, NULL }, /* %J */
+	{ NULL, NULL }, /* %N */
+	{ NULL, NULL }, /* %O */
+	{ NULL, NULL }, /* %P */
+	{ NULL, NULL }, /* %R */
+	{ NULL, NULL }, /* %T */
+	{ NULL, NULL }, /* %V */
+	{ NULL, NULL }, /* Ac */
+	{ NULL, NULL }, /* Ao */
+	{ NULL, NULL }, /* Aq */
+	{ NULL, NULL }, /* At */ 
+	{ NULL, NULL }, /* Bc */
+	{ NULL, NULL }, /* Bf */ 
+	{ NULL, NULL }, /* Bo */
+	{ NULL, NULL }, /* Bq */
+	{ NULL, NULL }, /* Bsx */
+	{ NULL, NULL }, /* Bx */
+	{ NULL, NULL }, /* Db */
+	{ NULL, NULL }, /* Dc */
+	{ NULL, NULL }, /* Do */
+	{ NULL, NULL }, /* Dq */
+	{ NULL, NULL }, /* Ec */
+	{ NULL, NULL }, /* Ef */
+	{ NULL, NULL }, /* Em */ 
+	{ NULL, NULL }, /* Eo */
+	{ NULL, NULL }, /* Fx */
+	{ NULL, NULL }, /* Ms */
+	{ NULL, NULL }, /* No */
+	{ NULL, NULL }, /* Ns */
+	{ NULL, NULL }, /* Nx */
+	{ NULL, NULL }, /* Ox */
+	{ NULL, NULL }, /* Pc */
+	{ NULL, NULL }, /* Pf */
+	{ NULL, NULL }, /* Po */
+	{ NULL, NULL }, /* Pq */
+	{ NULL, NULL }, /* Qc */
+	{ NULL, NULL }, /* Ql */
+	{ NULL, NULL }, /* Qo */
+	{ NULL, NULL }, /* Qq */
+	{ NULL, NULL }, /* Re */
+	{ NULL, NULL }, /* Rs */
+	{ NULL, NULL }, /* Sc */
+	{ NULL, NULL }, /* So */
+	{ NULL, NULL }, /* Sq */
+	{ NULL, NULL }, /* Sm */
+	{ NULL, NULL }, /* Sx */
+	{ NULL, NULL }, /* Sy */
+	{ NULL, NULL }, /* Tn */
+	{ NULL, NULL }, /* Ux */
+	{ NULL, NULL }, /* Xc */
+	{ NULL, NULL }, /* Xo */
+	{ NULL, NULL }, /* Fo */ 
+	{ NULL, NULL }, /* Fc */ 
+	{ NULL, NULL }, /* Oo */
+	{ NULL, NULL }, /* Oc */
+	{ NULL, NULL }, /* Bk */
+	{ NULL, NULL }, /* Ek */
+	{ NULL, NULL }, /* Bt */
+	{ NULL, NULL }, /* Hf */
+	{ NULL, NULL }, /* Fr */
+	{ NULL, NULL }, /* Ud */
+	{ NULL, NULL }, /* Lb */
+	{ NULL, NULL }, /* Ap */
+	{ NULL, NULL }, /* Lp */
+	{ NULL, NULL }, /* Lk */
+	{ NULL, NULL }, /* Mt */
+	{ NULL, NULL }, /* Brq */
+	{ NULL, NULL }, /* Bro */
+	{ NULL, NULL }, /* Brc */
+	{ NULL, NULL }, /* %C */
+	{ NULL, NULL }, /* Es */
+	{ NULL, NULL }, /* En */
+	{ NULL, NULL }, /* Dx */
+	{ NULL, NULL }, /* %Q */
+};
+
+
+int
+mdoc_action_pre(struct mdoc *m, const struct mdoc_node *n)
+{
+
+	switch (n->type) {
+	case (MDOC_ROOT):
+		break;
+	case (MDOC_TEXT):
+		break;
+	default:
+		if (NULL == mdoc_actions[m->last->tok].pre)
+			break;
+		return((*mdoc_actions[m->last->tok].pre)(m, n));
+	}
+	return(1);
+}
+
+
+int
+mdoc_action_post(struct mdoc *m)
+{
+
+	if (MDOC_ACTED & m->last->flags)
+		return(1);
+	m->last->flags |= MDOC_ACTED;
+
+	switch (m->last->type) {
+	case (MDOC_TEXT):
+		break;
+	case (MDOC_ROOT):
+		break;
+	default:
+		if (NULL == mdoc_actions[m->last->tok].post)
+			break;
+		return((*mdoc_actions[m->last->tok].post)(m));
+	}
+	return(1);
+}
+
+
+static int
+pwarn(struct mdoc *m, int line, int pos, enum mwarn type)
+{
+	char		*p;
+	int		 c;
+
+	p = NULL;
+	c = WARN_SYNTAX;
+
+	switch (type) {
+	case (WBADSEC):
+		p = "inappropriate document section in manual section";
+		c = WARN_COMPAT;
+		break;
+	case (WNOWIDTH):
+		p = "cannot determine default width";
+		break;
+	case (WBADDATE):
+		p = "malformed date syntax";
+		break;
+	}
+
+	assert(p);
+	return(mdoc_pwarn(m, line, pos, c, p));
+}
+
+
+static int
+post_std(POST_ARGS)
+{
+
+	/*
+	 * If '-std' is invoked without an argument, fill it in with our
+	 * name (if it's been set).
+	 */
+
+	if (NULL == m->last->args)
+		return(1);
+	if (m->last->args->argv[0].sz)
+		return(1);
+
+	assert(m->meta.name);
+
+	m->last->args->argv[0].value = calloc(1, sizeof(char *));
+	if (NULL == m->last->args->argv[0].value)
+		err(1, "calloc");
+
+	m->last->args->argv[0].sz = 1;
+	m->last->args->argv[0].value[0] = xstrdup(m->meta.name);
+	return(1);
+}
+
+
+static int
+post_nm(POST_ARGS)
+{
+	char		 buf[64];
+
+	if (m->meta.name)
+		return(1);
+
+	(void)xstrlcpys(buf, m->last->child, sizeof(buf));
+	m->meta.name = xstrdup(buf);
+
+	return(1);
+}
+
+
+static int
+post_sh(POST_ARGS)
+{
+	enum mdoc_sec	 sec;
+	char		 buf[64];
+
+	/*
+	 * We keep track of the current section /and/ the "named"
+	 * section, which is one of the conventional ones, in order to
+	 * check ordering.
+	 */
+
+	if (MDOC_HEAD != m->last->type)
+		return(1);
+
+	(void)xstrlcpys(buf, m->last->child, sizeof(buf));
+	if (SEC_CUSTOM != (sec = mdoc_atosec(buf)))
+		m->lastnamed = sec;
+
+	switch ((m->lastsec = sec)) {
+	case (SEC_RETURN_VALUES):
+		/* FALLTHROUGH */
+	case (SEC_ERRORS):
+		switch (m->meta.msec) {
+		case (2):
+			/* FALLTHROUGH */
+		case (3):
+			/* FALLTHROUGH */
+		case (9):
+			break;
+		default:
+			return(mwarn(m, WBADSEC));
+		}
+		break;
+	default:
+		break;
+	}
+	return(1);
+}
+
+
+static int
+post_dt(POST_ARGS)
+{
+	struct mdoc_node *n;
+	const char	 *cp;
+	char		 *ep;
+	long		  lval;
+
+	if (m->meta.title)
+		free(m->meta.title);
+	if (m->meta.vol)
+		free(m->meta.vol);
+	if (m->meta.arch)
+		free(m->meta.arch);
+
+	m->meta.title = m->meta.vol = m->meta.arch = NULL;
+	m->meta.msec = 0;
+
+	/* Handles: `.Dt' 
+	 *   --> title = unknown, volume = local, msec = 0, arch = NULL
+	 */
+
+	if (NULL == (n = m->last->child)) {
+		m->meta.title = xstrdup("unknown");
+		m->meta.vol = xstrdup("local");
+		return(post_prol(m));
+	}
+
+	/* Handles: `.Dt TITLE' 
+	 *   --> title = TITLE, volume = local, msec = 0, arch = NULL
+	 */
+
+	m->meta.title = xstrdup(n->string);
+
+	if (NULL == (n = n->next)) {
+		m->meta.vol = xstrdup("local");
+		return(post_prol(m));
+	}
+
+	/* Handles: `.Dt TITLE SEC'
+	 *   --> title = TITLE, volume = SEC is msec ? 
+	 *           format(msec) : SEC,
+	 *       msec = SEC is msec ? atoi(msec) : 0,
+	 *       arch = NULL
+	 */
+
+	cp = mdoc_a2msec(n->string);
+	if (cp) {
+		m->meta.vol = xstrdup(cp);
+		errno = 0;
+		lval = strtol(n->string, &ep, 10);
+		if (n->string[0] != '\0' && *ep == '\0')
+			m->meta.msec = (int)lval;
+	} else 
+		m->meta.vol = xstrdup(n->string);
+
+	if (NULL == (n = n->next))
+		return(post_prol(m));
+
+	/* Handles: `.Dt TITLE SEC VOL'
+	 *   --> title = TITLE, volume = VOL is vol ?
+	 *       format(VOL) : 
+	 *           VOL is arch ? format(arch) : 
+	 *               VOL
+	 */
+
+	cp = mdoc_a2vol(n->string);
+	if (cp) {
+		free(m->meta.vol);
+		m->meta.vol = xstrdup(cp);
+		n = n->next;
+	} else {
+		cp = mdoc_a2arch(n->string);
+		if (NULL == cp) {
+			free(m->meta.vol);
+			m->meta.vol = xstrdup(n->string);
+		} else
+			m->meta.arch = xstrdup(cp);
+	}	
+
+	/* Ignore any subsequent parameters... */
+
+	return(post_prol(m));
+}
+
+
+static int
+post_os(POST_ARGS)
+{
+	char		  buf[64];
+	struct utsname	  utsname;
+
+	if (m->meta.os)
+		free(m->meta.os);
+
+	(void)xstrlcpys(buf, m->last->child, sizeof(buf));
+
+	if (0 == buf[0]) {
+		if (-1 == uname(&utsname))
+			return(mdoc_err(m, "utsname"));
+		(void)xstrlcpy(buf, utsname.sysname, sizeof(buf));
+		(void)xstrlcat(buf, " ", sizeof(buf));
+		(void)xstrlcat(buf, utsname.release, sizeof(buf));
+	}
+
+	m->meta.os = xstrdup(buf);
+	m->lastnamed = m->lastsec = SEC_BODY;
+
+	return(post_prol(m));
+}
+
+
+/*
+ * Calculate the -width for a `Bl -tag' list if it hasn't been provided.
+ * Uses the first head macro.
+ */
+static int
+post_bl_tagwidth(struct mdoc *m)
+{
+	struct mdoc_node  *n;
+	int		   sz;
+	char		   buf[32];
+
+	/*
+	 * Use the text width, if a text node, or the default macro
+	 * width if a macro.
+	 */
+
+	if ((n = m->last->body->child)) {
+		assert(MDOC_BLOCK == n->type);
+		assert(MDOC_It == n->tok);
+		n = n->head->child;
+	}
+
+	sz = 10; /* Default size. */
+
+	if (n) {
+		if (MDOC_TEXT != n->type) {
+			if (0 == (sz = (int)mdoc_macro2len(n->tok)))
+				if ( ! mwarn(m, WNOWIDTH))
+					return(0);
+		} else
+			sz = (int)strlen(n->string) + 1;
+	} 
+
+	(void)snprintf(buf, sizeof(buf), "%dn", sz);
+
+	/*
+	 * We have to dynamically add this to the macro's argument list.
+	 * We're guaranteed that a MDOC_Width doesn't already exist.
+	 */
+
+	n = m->last;
+	assert(n->args);
+
+	sz = (int)(n->args->argc)++;
+	n->args->argv = xrealloc(n->args->argv, 
+			n->args->argc * sizeof(struct mdoc_argv));
+
+	n->args->argv[sz].arg = MDOC_Width;
+	n->args->argv[sz].line = m->last->line;
+	n->args->argv[sz].pos = m->last->pos;
+	n->args->argv[sz].sz = 1;
+	n->args->argv[sz].value = calloc(1, sizeof(char *));
+	if (NULL == n->args->argv[sz].value)
+		err(1, "calloc");
+	n->args->argv[sz].value[0] = xstrdup(buf);
+
+	return(1);
+}
+
+
+static int
+post_bl_width(struct mdoc *m)
+{
+	size_t		  width;
+	int		  i, tok;
+	char		  buf[32];
+	char		 *p;
+
+	if (NULL == m->last->args)
+		return(1);
+
+	for (i = 0; i < (int)m->last->args->argc; i++)
+		if (MDOC_Width == m->last->args->argv[i].arg)
+			break;
+
+	if (i == (int)m->last->args->argc)
+		return(1);
+
+	p = m->last->args->argv[i].value[0];
+
+	/*
+	 * If the value to -width is a macro, then we re-write it to be
+	 * the macro's width as set in share/tmac/mdoc/doc-common.
+	 */
+
+	if (xstrcmp(p, "Ds"))
+		width = 8;
+	else if (MDOC_MAX == (tok = mdoc_tokhash_find(m->htab, p)))
+		return(1);
+	else if (0 == (width = mdoc_macro2len(tok))) 
+		return(mwarn(m, WNOWIDTH));
+
+	/* The value already exists: free and reallocate it. */
+
+	(void)snprintf(buf, sizeof(buf), "%zun", width);
+
+	free(m->last->args->argv[i].value[0]);
+	m->last->args->argv[i].value[0] = xstrdup(buf);
+
+	return(1);
+}
+
+
+static int
+post_bl(POST_ARGS)
+{
+	int		  i, r, len;
+
+	if (MDOC_BLOCK != m->last->type)
+		return(1);
+
+	/*
+	 * These are fairly complicated, so we've broken them into two
+	 * functions.  post_bl_tagwidth() is called when a -tag is
+	 * specified, but no -width (it must be guessed).  The second
+	 * when a -width is specified (macro indicators must be
+	 * rewritten into real lengths).
+	 */
+
+	len = (int)(m->last->args ? m->last->args->argc : 0);
+
+	for (r = i = 0; i < len; i++) {
+		if (MDOC_Tag == m->last->args->argv[i].arg)
+			r |= 1 << 0;
+		if (MDOC_Width == m->last->args->argv[i].arg)
+			r |= 1 << 1;
+	}
+
+	if (r & (1 << 0) && ! (r & (1 << 1))) {
+		if ( ! post_bl_tagwidth(m))
+			return(0);
+	} else if (r & (1 << 1))
+		if ( ! post_bl_width(m))
+			return(0);
+
+	return(1);
+}
+
+
+static int
+post_ar(POST_ARGS)
+{
+	struct mdoc_node *n;
+
+	if (m->last->child)
+		return(1);
+	
+	n = m->last;
+	m->next = MDOC_NEXT_CHILD;
+	if ( ! mdoc_word_alloc(m, m->last->line,
+				m->last->pos, "file"))
+		return(0);
+	m->next = MDOC_NEXT_SIBLING;
+	if ( ! mdoc_word_alloc(m, m->last->line, 
+				m->last->pos, "..."))
+		return(0);
+
+	m->last = n;
+	m->next = MDOC_NEXT_SIBLING;
+	return(1);
+}
+
+
+static int
+post_dd(POST_ARGS)
+{
+	char		  buf[64];
+
+	(void)xstrlcpys(buf, m->last->child, sizeof(buf));
+
+	if (0 == (m->meta.date = mdoc_atotime(buf))) {
+		if ( ! mwarn(m, WBADDATE))
+			return(0);
+		m->meta.date = time(NULL);
+	}
+
+	return(post_prol(m));
+}
+
+
+static int
+post_prol(POST_ARGS)
+{
+	struct mdoc_node *n;
+
+	/* 
+	 * The end document shouldn't have the prologue macros as part
+	 * of the syntax tree (they encompass only meta-data).  
+	 */
+
+	if (m->last->parent->child == m->last)
+		m->last->parent->child = m->last->prev;
+	if (m->last->prev)
+		m->last->prev->next = NULL;
+
+	n = m->last;
+	assert(NULL == m->last->next);
+
+	if (m->last->prev) {
+		m->last = m->last->prev;
+		m->next = MDOC_NEXT_SIBLING;
+	} else {
+		m->last = m->last->parent;
+		m->next = MDOC_NEXT_CHILD;
+	}
+
+	mdoc_node_freelist(n);
+	return(1);
+}
+
+
+static int
+pre_dl(PRE_ARGS)
+{
+
+	if (MDOC_BODY != n->type)
+		return(1);
+	m->flags |= MDOC_LITERAL;
+	return(1);
+}
+
+
+static int
+pre_bd(PRE_ARGS)
+{
+	int		 i;
+
+	if (MDOC_BODY != n->type)
+		return(1);
+
+	/* 
+	 * We ONLY enter a literal context if `Bd -literal' or `Bd
+	 * -unfilled'.  
+	 */
+
+	n = n->parent;
+
+	for (i = 0; i < (int)n->args->argc; i++)
+		if (MDOC_Literal == n->args->argv[i].arg)
+			break;
+		else if (MDOC_Unfilled == n->args->argv[i].arg)
+			break;
+
+	if (i < (int)n->args->argc)
+		m->flags |= MDOC_LITERAL;
+
+	return(1);
+}
+
+
+static int
+post_display(POST_ARGS)
+{
+
+	if (MDOC_BODY == m->last->type)
+		m->flags &= ~MDOC_LITERAL;
+	return(1);
+}
+
+