Split roff engine into roff.c.

Re-worked calling convention for md_*.

1 files changed, 6 insertions, 616 deletions

diff --git a/html4_strict.c b/html4_strict.c
index 717d007a..2cd61e36 100644
--- a/html4_strict.c
+++ b/html4_strict.c
@@ -17,642 +17,32 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 #include <assert.h>
-#include <ctype.h>
-#include <err.h>
 #include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
 
 #include "libmdocml.h"
 #include "private.h"
 
-#define	ROFF_MAXARG	  10
-
-enum	roffd { 
-	ROFF_ENTER = 0, 
-	ROFF_EXIT 
-};
-
-enum	rofftype { 
-	ROFF_TITLE, 
-	ROFF_COMMENT, 
-	ROFF_TEXT, 
-	ROFF_LAYOUT 
-};
-
-#define	ROFFCALL_ARGS	  					\
-	const struct md_args *arg, struct md_mbuf *out,		\
-	const struct md_rbuf *in, const char *argv[],		\
-	enum roffd type, struct rofftree *tree
-
-struct	rofftree;
-
-struct	rofftok {
-	int		  id;
-	char		  name[2];
-	int		(*cb)(ROFFCALL_ARGS);
-	enum rofftype	  type;
-	int		  flags;
-#define	ROFF_NESTED	 (1 << 0) 
-#define	ROFF_PARSED	 (1 << 1)
-#define	ROFF_CALLABLE	 (1 << 2)
-#define	ROFF_QUOTES	 (1 << 3)
-};
-
-struct	roffnode {
-	int		  tok;	
-	struct roffnode	 *parent;
-	size_t		  line;
-};
-
-struct	rofftree {
-	struct roffnode	 *last;
-	time_t		  date;
-	char		  title[256];
-	char		  section[256];
-	char		  volume[256];
-	int		  state;
-#define	ROFF_PRELUDE	 (1 << 1)
-#define	ROFF_PRELUDE_Os	 (1 << 2)
-#define	ROFF_PRELUDE_Dt	 (1 << 3)
-#define	ROFF_PRELUDE_Dd	 (1 << 4)
-#define	ROFF_BODY	 (1 << 5)
-};
-
-#define	ROFF___	 	  0
-#define	ROFF_Dd		  1
-#define	ROFF_Dt		  2
-#define	ROFF_Os		  3
-#define	ROFF_Sh		  4
-#define	ROFF_An		  5
-#define	ROFF_Li		  6
-#define	ROFF_MAX	  7
-
-static	int		  roff_Dd(ROFFCALL_ARGS);
-static	int		  roff_Dt(ROFFCALL_ARGS);
-static	int		  roff_Os(ROFFCALL_ARGS);
-static	int		  roff_Sh(ROFFCALL_ARGS);
-static	int		  roff_An(ROFFCALL_ARGS);
-static	int		  roff_Li(ROFFCALL_ARGS);
-
-static	struct roffnode	 *roffnode_new(int, size_t, 
-				struct rofftree *);
-static	void		  roffnode_free(int, struct rofftree *);
-
-static	int		  rofffind(const char *);
-static	int		  roffargs(int, char *, char **);
-static	int 		  roffparse(const struct md_args *, 
-				struct md_mbuf *,
-				const struct md_rbuf *, 
-				char *, size_t, struct rofftree *);
-static	int		  textparse(struct md_mbuf *, 
-				const struct md_rbuf *, 
-				const char *, size_t, 
-				const struct rofftree *);
-
-static	void		  dbg_enter(const struct md_args *, int);
-static	void		  dbg_leave(const struct md_args *, int);
-
-
-static const struct rofftok tokens[ROFF_MAX] = 
-{
-{ ROFF___, "\\\"",     NULL, ROFF_COMMENT,			  0 },
-{ ROFF_Dd,   "Dd",  roff_Dd, ROFF_TITLE,			  0 },
-{ ROFF_Dt,   "Dt",  roff_Dt, ROFF_TITLE,			  0 },
-{ ROFF_Os,   "Os",  roff_Os, ROFF_TITLE,			  0 },
-{ ROFF_Sh,   "Sh",  roff_Sh, ROFF_LAYOUT,			  0 },
-{ ROFF_An,   "An",  roff_An, ROFF_TEXT,	ROFF_PARSED 		    },
-{ ROFF_Li,   "Li",  roff_Li, ROFF_TEXT,	ROFF_PARSED | ROFF_CALLABLE },
-};
-
 
 int
-md_exit_html4_strict(const struct md_args *args, struct md_mbuf *out, 
-		const struct md_rbuf *in, int error, void *data)
+md_line_html4_strict(void *data, char *buf, size_t sz)
 {
-	struct rofftree	*tree;
-
-	assert(args);
-	assert(data);
-	tree = (struct rofftree *)data;
-
-	if (-1 == error)
-		out = NULL;
-
-	/* LINTED */
-	while (tree->last)
-		if ( ! (*tokens[tree->last->tok].cb)(args, out, in, 
-					NULL, ROFF_EXIT, tree))
-			out = NULL;
-
-	if (out && (ROFF_PRELUDE & tree->state)) {
-		warnx("%s: prelude never finished", in->name);
-		error = 1;
-	}
-
-	free(tree);
 
-	return(error ? 0 : 1);
-}
-
-
-int
-md_init_html4_strict(const struct md_args *args, struct md_mbuf *out, 
-		const struct md_rbuf *in, void **data) 
-{
-	struct rofftree	*tree;
-
-	assert(args);
-	assert(in);
-	assert(out);
-	assert(data);
-
-	/* TODO: write HTML-DTD header. */
-
-	if (NULL == (tree = calloc(1, sizeof(struct rofftree)))) {
-		warn("malloc");
-		return(0);
-	}
-
-	tree->state = ROFF_PRELUDE;
-
-	*data = tree;
 	return(1);
 }
 
 
 int
-md_line_html4_strict(const struct md_args *args, struct md_mbuf *out, 
-		const struct md_rbuf *in, char *buf, 
-		size_t sz, void *data)
-{
-	struct rofftree	*tree;
-
-	assert(args);
-	assert(in);
-	assert(data);
-
-	tree = (struct rofftree *)data;
-
-	if (0 == sz) {
-		warnx("%s: blank line (line %zu)", in->name, in->line);
-		return(0);
-	} else if ('.' != *buf)
-		return(textparse(out, in, buf, sz, tree));
-
-	return(roffparse(args, out, in, buf, sz, tree));
-}
-
-
-static int
-textparse(struct md_mbuf *out, const struct md_rbuf *in, 
-		const char *buf, size_t sz, 
-		const struct rofftree *tree)
-{
-	
-	assert(tree);
-	assert(out);
-	assert(in);
-	assert(buf);
-	assert(sz > 0);
-
-	if (NULL == tree->last) {
-		warnx("%s: unexpected text (line %zu)",
-				in->name, in->line);
-		return(0);
-	} else if (NULL == tree->last->parent) {
-		warnx("%s: disallowed text (line %zu)",
-				in->name, in->line);
-		return(0);
-	}
-
-	if ( ! md_buf_puts(out, buf, sz))
-		return(0);
-	return(md_buf_putstring(out, " "));
-}
-
-
-static int
-roffargs(int tok, char *buf, char **argv)
-{
-	int		 i;
-
-	(void)tok;/* FIXME: quotable strings? */
-
-	assert(tok >= 0 && tok < ROFF_MAX);
-	assert('.' == *buf);
-
-	/* LINTED */
-	for (i = 0; *buf && i < ROFF_MAXARG; i++) {
-		argv[i] = buf++;
-		while (*buf && ! isspace(*buf))
-			buf++;
-		if (NULL == *buf) {
-			continue;
-		}
-		*buf++ = 0;
-		while (*buf && isspace(*buf))
-			buf++;
-	}
-	
-	assert(i > 0);
-	if (i < ROFF_MAXARG)
-		argv[i] = NULL;
-
-	return(ROFF_MAXARG > i);
-}
-
-
-static int
-roffparse(const struct md_args *args, struct md_mbuf *out,
-		const struct md_rbuf *in, char *buf, size_t sz, 
-		struct rofftree *tree)
-{
-	int		 tok, t;
-	struct roffnode	*node;
-	char		*argv[ROFF_MAXARG];
-
-	assert(sz > 0);
-
-	/*
-	 * Extract the token identifier from the buffer.  If there's no
-	 * callback for the token (comment, etc.) then exit immediately.
-	 * We don't do any error handling (yet), so if the token doesn't
-	 * exist, die.
-	 */
-
-	if (3 > sz) {
-		warnx("%s: malformed line (line %zu)", 
-				in->name, in->line);
-		return(0);
-	} else if (ROFF_MAX == (tok = rofffind(buf + 1))) {
-		warnx("%s: unknown line token `%c%c' (line %zu)",
-				in->name, *(buf + 1), 
-				*(buf + 2), in->line);
-		return(0);
-	} else if (ROFF_COMMENT == tokens[tok].type) 
-		/* Ignore comment tokens. */
-		return(1);
-	
-	if ( ! roffargs(tok, buf, argv)) {
-		warnx("%s: too many arguments to `%s' (line %zu)",
-				in->name, tokens[tok].name, in->line);
-		return(0);
-	}
-
-	/* Domain cross-contamination (and sanity) checks. */
-
-	switch (tokens[tok].type) {
-	case (ROFF_TITLE):
-		if (ROFF_PRELUDE & tree->state) {
-			assert( ! (ROFF_BODY & tree->state));
-			break;
-		}
-		assert(ROFF_BODY & tree->state);
-		warnx("%s: prelude token `%s' in body (line %zu)",
-				in->name, tokens[tok].name, in->line);
-		return(0);
-	case (ROFF_LAYOUT):
-		/* FALLTHROUGH */
-	case (ROFF_TEXT):
-		if (ROFF_BODY & tree->state) {
-			assert( ! (ROFF_PRELUDE & tree->state));
-			break;
-		}
-		assert(ROFF_PRELUDE & tree->state);
-		warnx("%s: body token `%s' in prelude (line %zu)",
-				in->name, tokens[tok].name, in->line);
-		return(0);
-	case (ROFF_COMMENT):
-		return(1);
-	default:
-		abort();
-	}
-
-	/*
-	 * Text-domain checks.
-	 */
-
-	if (ROFF_TEXT == tokens[tok].type &&
-			! (ROFF_PARSED & tokens[tok].flags)) {
-		warnx("%s: text token `%s' not callable (line %zu)",
-				in->name, tokens[tok].name, in->line);
-		return(0);
-	}
-
-	/*
-	 * If this is a non-nestable layout token and we're below a
-	 * token of the same type, then recurse upward to the token,
-	 * closing out the interim scopes.
-	 *
-	 * If there's a nested token on the chain, then raise an error
-	 * as nested tokens have corresponding "ending" tokens and we're
-	 * breaking their scope.
-	 */
-
-	node = NULL;
-
-	if (ROFF_LAYOUT == tokens[tok].type && 
-			! (ROFF_NESTED & tokens[tok].flags)) {
-		for (node = tree->last; node; node = node->parent) {
-			if (node->tok == tok)
-				break;
-
-			/* Don't break nested scope. */
-
-			if ( ! (ROFF_NESTED & tokens[node->tok].flags))
-				continue;
-			warnx("%s: scope of %s (line %zu) broken by "
-					"%s (line %zu)", in->name, 
-					tokens[tok].name,
-					node->line, 
-					tokens[node->tok].name,
-					in->line);
-			return(0);
-		}
-	}
-
-	if (node) {
-		assert(ROFF_LAYOUT == tokens[tok].type);
-		assert( ! (ROFF_NESTED & tokens[tok].flags));
-		assert(node->tok == tok);
-
-		/* Clear up to last scoped token. */
-
-		/* LINTED */
-		do {
-			t = tree->last->tok;
-			if ( ! (*tokens[tree->last->tok].cb)
-					(args, out, in, NULL,
-					 ROFF_EXIT, tree))
-				return(0);
-		} while (t != tok);
-	}
-
-	/* Proceed with actual token processing. */
-
-	return((*tokens[tok].cb)(args, out, in, (const char **)argv, 
-				ROFF_ENTER, tree));
-}
-
-
-static int
-rofffind(const char *name)
-{
-	size_t		 i;
-
-	assert(name);
-	/* FIXME: use a table, this is slow but ok for now. */
-
-	/* LINTED */
-	for (i = 0; i < ROFF_MAX; i++)
-		/* LINTED */
-		if (0 == strncmp(name, tokens[i].name, 2))
-			return((int)i);
-	
-	return(ROFF_MAX);
-}
-
-
-static struct roffnode *
-roffnode_new(int tokid, size_t line, struct rofftree *tree)
-{
-	struct roffnode	*p;
-	
-	if (NULL == (p = malloc(sizeof(struct roffnode)))) {
-		warn("malloc");
-		return(NULL);
-	}
-
-	p->line = line;
-	p->tok = tokid;
-	p->parent = tree->last;
-	tree->last = p;
-	return(p);
-}
-
-
-static void
-roffnode_free(int tokid, struct rofftree *tree)
-{
-	struct roffnode	*p;
-
-	assert(tree->last);
-	assert(tree->last->tok == tokid);
-
-	p = tree->last;
-	tree->last = tree->last->parent;
-	free(p);
-}
-
-
-static int dbg_lvl = 0;
-
-
-static void
-dbg_enter(const struct md_args *args, int tokid)
-{
-	int		 i;
-	static char	 buf[72];
-
-	assert(args);
-	if ( ! (args->dbg & MD_DBG_TREE))
-		return;
-	assert(tokid >= 0 && tokid <= ROFF_MAX);
-
-	buf[0] = 0;
-
-	switch (tokens[tokid].type) {
-	case (ROFF_LAYOUT):
-		/* FALLTHROUGH */
-	case (ROFF_TEXT):
-		(void)strlcat(buf, "body: ", sizeof(buf));
-		break;
-	case (ROFF_TITLE):
-		(void)strlcat(buf, "prelude: ", sizeof(buf));
-		break;
-	default:
-		abort();
-	}
-
-	/* LINTED */
-	for (i = 0; i < dbg_lvl; i++)
-		(void)strlcat(buf, "  ", sizeof(buf));
-
-	(void)strlcat(buf, tokens[tokid].name, sizeof(buf));
-
-	(void)printf("%s\n", buf);
-
-	if (ROFF_LAYOUT == tokens[tokid].type)
-		dbg_lvl++;
-}
-
-
-static void
-dbg_leave(const struct md_args *args, int tokid)
-{
-	assert(args);
-	if ( ! (args->dbg & MD_DBG_TREE))
-		return;
-	if (ROFF_LAYOUT != tokens[tokid].type)
-		return;
-
-	assert(tokid >= 0 && tokid <= ROFF_MAX);
-	assert(dbg_lvl > 0);
-	dbg_lvl--;
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Dd(ROFFCALL_ARGS)
-{
-
-	dbg_enter(arg, ROFF_Dd);
-
-	assert(ROFF_PRELUDE & tree->state);
-	if (ROFF_PRELUDE_Dt & tree->state ||
-			ROFF_PRELUDE_Dd & tree->state) {
-		warnx("%s: prelude `Dd' out-of-order (line %zu)",
-				in->name, in->line);
-		return(0);
-	}
-
-	assert(NULL == tree->last);
-	tree->state |= ROFF_PRELUDE_Dd;
-
-	dbg_leave(arg, ROFF_Dd);
-
-	return(1);
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Dt(ROFFCALL_ARGS)
-{
-
-	dbg_enter(arg, ROFF_Dt);
-
-	assert(ROFF_PRELUDE & tree->state);
-	if ( ! (ROFF_PRELUDE_Dd & tree->state) ||
-			(ROFF_PRELUDE_Dt & tree->state)) {
-		warnx("%s: prelude `Dt' out-of-order (line %zu)",
-				in->name, in->line);
-		return(0);
-	}
-
-	assert(NULL == tree->last);
-	tree->state |= ROFF_PRELUDE_Dt;
-
-	dbg_leave(arg, ROFF_Dt);
-
-	return(1);
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Os(ROFFCALL_ARGS)
+md_exit_html4_strict(void *data, int flush)
 {
 
-	if (ROFF_EXIT == type) {
-		roffnode_free(ROFF_Os, tree);
-		dbg_leave(arg, ROFF_Os);
-		return(1);
-	} 
-
-	dbg_enter(arg, ROFF_Os);
-
-	assert(ROFF_PRELUDE & tree->state);
-	if ( ! (ROFF_PRELUDE_Dt & tree->state) ||
-			! (ROFF_PRELUDE_Dd & tree->state)) {
-		warnx("%s: prelude `Os' out-of-order (line %zu)",
-				in->name, in->line);
-		return(0);
-	}
-
-	assert(NULL == tree->last);
-	if (NULL == roffnode_new(ROFF_Os, in->line, tree))
-		return(0);
-
-	tree->state |= ROFF_PRELUDE_Os;
-	tree->state &= ~ROFF_PRELUDE;
-	tree->state |= ROFF_BODY;
-
-	return(1);
-}
-
-
-/* ARGSUSED */
-static int
-roff_Sh(ROFFCALL_ARGS)
-{
-
-	if (ROFF_EXIT == type) {
-		roffnode_free(ROFF_Sh, tree);
-		dbg_leave(arg, ROFF_Sh);
-		return(1);
-	} 
-
-	dbg_enter(arg, ROFF_Sh);
-
-	if (NULL == roffnode_new(ROFF_Sh, in->line, tree))
-		return(0);
-
-	dbg_leave(arg, ROFF_Li);
-
 	return(1);
 }
 
 
-/* ARGSUSED */
-static int
-roff_Li(ROFFCALL_ARGS) 
+void *
+md_init_html4_strict(const struct md_args *args,
+		struct md_mbuf *mbuf, const struct md_rbuf *rbuf)
 {
 
-	dbg_enter(arg, ROFF_Li);
-	dbg_leave(arg, ROFF_Li);
-
-	return(1);
-}
-
-
-#if 0
-static int
-parse_args(void)
-{
-	skip_whitespace();
-
-	while (pos < sz) {
-
-		if (is_arg) {
-		} else if (parsable) {
-			if (is_callable_token()) {
-			}
-		} 
-
-		skip_whitespace();
-	}
-}
-#endif
-
-
-/* ARGSUSED */
-static int
-roff_An(ROFFCALL_ARGS) 
-{
-
-	dbg_enter(arg, ROFF_An);
-
-	/* Do our ML stuff. */
-
-	/*parse_args();*/
-
-	/* Do our trailing whitespace stuff. */
-
-	dbg_leave(arg, ROFF_An);
-
-	return(1);
+	return(NULL);
 }