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Revision 1.110, Mon Sep 16 00:25:07 2013 UTC (8 years, 11 months ago) by schwarze
Branch: MAIN
CVS Tags: VERSION_1_12_2
Changes since 1.109: +2 -2 lines

One of the WARNING messages has to use the word "section" twice in two
different meanings, that cannot be helped.  But we can make this less
confusing by stating that the second instance refers to stuff like (2),
(3), and (9), and by adding the sections header the first instance
refers to, for example ERRORS or RETURN VALUES.

Source for confusion noticed by Jan Stary <hans at stare dot cz>,
better wording suggested by jmc@, tweaked by me.

/*	$Id: mandoc.h,v 1.110 2013/09/16 00:25:07 schwarze Exp $ */
/*
 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2012, 2013 Ingo Schwarze <schwarze@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.
 */
#ifndef MANDOC_H
#define MANDOC_H

#define ASCII_NBRSP	 31  /* non-breaking space */
#define	ASCII_HYPH	 30  /* breakable hyphen */

/*
 * Status level.  This refers to both internal status (i.e., whilst
 * running, when warnings/errors are reported) and an indicator of a
 * threshold of when to halt (when said internal state exceeds the
 * threshold).
 */
enum	mandoclevel {
	MANDOCLEVEL_OK = 0,
	MANDOCLEVEL_RESERVED,
	MANDOCLEVEL_WARNING, /* warnings: syntax, whitespace, etc. */
	MANDOCLEVEL_ERROR, /* input has been thrown away */
	MANDOCLEVEL_FATAL, /* input is borked */
	MANDOCLEVEL_BADARG, /* bad argument in invocation */
	MANDOCLEVEL_SYSERR, /* system error */
	MANDOCLEVEL_MAX
};

/*
 * All possible things that can go wrong within a parse, be it libroff,
 * libmdoc, or libman.
 */
enum	mandocerr {
	MANDOCERR_OK,

	MANDOCERR_WARNING, /* ===== start of warnings ===== */

	/* related to the prologue */
	MANDOCERR_NOTITLE, /* no title in document */
	MANDOCERR_UPPERCASE, /* document title should be all caps */
	MANDOCERR_BADMSEC, /* unknown manual section */
	MANDOCERR_BADVOLARCH, /* unknown manual volume or arch */
	MANDOCERR_NODATE, /* date missing, using today's date */
	MANDOCERR_BADDATE, /* cannot parse date, using it verbatim */
	MANDOCERR_PROLOGOOO, /* prologue macros out of order */
	MANDOCERR_PROLOGREP, /* duplicate prologue macro */
	MANDOCERR_BADPROLOG, /* macro not allowed in prologue */
	MANDOCERR_BADBODY, /* macro not allowed in body */

	/* related to document structure */
	MANDOCERR_SO, /* .so is fragile, better use ln(1) */
	MANDOCERR_NAMESECFIRST, /* NAME section must come first */
	MANDOCERR_BADNAMESEC, /* bad NAME section contents */
	MANDOCERR_SECOOO, /* sections out of conventional order */
	MANDOCERR_SECREP, /* duplicate section name */
	MANDOCERR_SECMSEC, /* section header suited to sections ... */

	/* related to macros and nesting */
	MANDOCERR_MACROOBS, /* skipping obsolete macro */
	MANDOCERR_IGNPAR, /* skipping paragraph macro */
	MANDOCERR_MOVEPAR, /* moving paragraph macro out of list */
	MANDOCERR_IGNNS, /* skipping no-space macro */
	MANDOCERR_SCOPENEST, /* blocks badly nested */
	MANDOCERR_CHILD, /* child violates parent syntax */
	MANDOCERR_NESTEDDISP, /* nested displays are not portable */
	MANDOCERR_SCOPEREP, /* already in literal mode */
	MANDOCERR_LINESCOPE, /* line scope broken */

	/* related to missing macro arguments */
	MANDOCERR_MACROEMPTY, /* skipping empty macro */
	MANDOCERR_ARGCWARN, /* argument count wrong */
	MANDOCERR_DISPTYPE, /* missing display type */
	MANDOCERR_LISTFIRST, /* list type must come first */
	MANDOCERR_NOWIDTHARG, /* tag lists require a width argument */
	MANDOCERR_FONTTYPE, /* missing font type */
	MANDOCERR_WNOSCOPE, /* skipping end of block that is not open */

	/* related to bad macro arguments */
	MANDOCERR_IGNARGV, /* skipping argument */
	MANDOCERR_ARGVREP, /* duplicate argument */
	MANDOCERR_DISPREP, /* duplicate display type */
	MANDOCERR_LISTREP, /* duplicate list type */
	MANDOCERR_BADATT, /* unknown AT&T UNIX version */
	MANDOCERR_BADBOOL, /* bad Boolean value */
	MANDOCERR_BADFONT, /* unknown font */
	MANDOCERR_BADSTANDARD, /* unknown standard specifier */
	MANDOCERR_BADWIDTH, /* bad width argument */

	/* related to plain text */
	MANDOCERR_NOBLANKLN, /* blank line in non-literal context */
	MANDOCERR_BADTAB, /* tab in non-literal context */
	MANDOCERR_EOLNSPACE, /* end of line whitespace */
	MANDOCERR_BADCOMMENT, /* bad comment style */
	MANDOCERR_BADESCAPE, /* unknown escape sequence */
	MANDOCERR_BADQUOTE, /* unterminated quoted string */

	/* related to equations */
	MANDOCERR_EQNQUOTE, /* unexpected literal in equation */

	MANDOCERR_ERROR, /* ===== start of errors ===== */

	/* related to equations */
	MANDOCERR_EQNNSCOPE, /* unexpected equation scope closure*/
	MANDOCERR_EQNSCOPE, /* equation scope open on exit */
	MANDOCERR_EQNBADSCOPE, /* overlapping equation scopes */
	MANDOCERR_EQNEOF, /* unexpected end of equation */
	MANDOCERR_EQNSYNT, /* equation syntax error */

	/* related to tables */
	MANDOCERR_TBL, /* bad table syntax */
	MANDOCERR_TBLOPT, /* bad table option */
	MANDOCERR_TBLLAYOUT, /* bad table layout */
	MANDOCERR_TBLNOLAYOUT, /* no table layout cells specified */
	MANDOCERR_TBLNODATA, /* no table data cells specified */
	MANDOCERR_TBLIGNDATA, /* ignore data in cell */
	MANDOCERR_TBLBLOCK, /* data block still open */
	MANDOCERR_TBLEXTRADAT, /* ignoring extra data cells */

	MANDOCERR_ROFFLOOP, /* input stack limit exceeded, infinite loop? */
	MANDOCERR_BADCHAR, /* skipping bad character */
	MANDOCERR_NAMESC, /* escaped character not allowed in a name */
	MANDOCERR_NONAME, /* manual name not yet set */
	MANDOCERR_NOTEXT, /* skipping text before the first section header */
	MANDOCERR_MACRO, /* skipping unknown macro */
	MANDOCERR_REQUEST, /* NOT IMPLEMENTED: skipping request */
	MANDOCERR_ARGCOUNT, /* argument count wrong */
	MANDOCERR_STRAYTA, /* skipping column outside column list */
	MANDOCERR_NOSCOPE, /* skipping end of block that is not open */
	MANDOCERR_SCOPEBROKEN, /* missing end of block */
	MANDOCERR_SCOPEEXIT, /* scope open on exit */
	MANDOCERR_UNAME, /* uname(3) system call failed */
	/* FIXME: merge following with MANDOCERR_ARGCOUNT */
	MANDOCERR_NOARGS, /* macro requires line argument(s) */
	MANDOCERR_NOBODY, /* macro requires body argument(s) */
	MANDOCERR_NOARGV, /* macro requires argument(s) */
	MANDOCERR_NUMERIC, /* request requires a numeric argument */
	MANDOCERR_LISTTYPE, /* missing list type */
	MANDOCERR_ARGSLOST, /* line argument(s) will be lost */
	MANDOCERR_BODYLOST, /* body argument(s) will be lost */

	MANDOCERR_FATAL, /* ===== start of fatal errors ===== */

	MANDOCERR_NOTMANUAL, /* manual isn't really a manual */
	MANDOCERR_COLUMNS, /* column syntax is inconsistent */
	MANDOCERR_BADDISP, /* NOT IMPLEMENTED: .Bd -file */
	MANDOCERR_SYNTARGVCOUNT, /* argument count wrong, violates syntax */
	MANDOCERR_SYNTCHILD, /* child violates parent syntax */
	MANDOCERR_SYNTARGCOUNT, /* argument count wrong, violates syntax */
	MANDOCERR_SOPATH, /* NOT IMPLEMENTED: .so with absolute path or ".." */
	MANDOCERR_NODOCBODY, /* no document body */
	MANDOCERR_NODOCPROLOG, /* no document prologue */
	MANDOCERR_MEM, /* static buffer exhausted */
	MANDOCERR_MAX
};

struct	tbl_opts {
	char		  tab; /* cell-separator */
	char		  decimal; /* decimal point */
	int		  linesize;
	int		  opts;
#define	TBL_OPT_CENTRE	 (1 << 0)
#define	TBL_OPT_EXPAND	 (1 << 1)
#define	TBL_OPT_BOX	 (1 << 2)
#define	TBL_OPT_DBOX	 (1 << 3)
#define	TBL_OPT_ALLBOX	 (1 << 4)
#define	TBL_OPT_NOKEEP	 (1 << 5)
#define	TBL_OPT_NOSPACE	 (1 << 6)
	int		  cols; /* number of columns */
};

/*
 * The head of a table specifies all of its columns.  When formatting a
 * tbl_span, iterate over these and plug in data from the tbl_span when
 * appropriate, using tbl_cell as a guide to placement.
 */
struct	tbl_head {
	int		  ident; /* 0 <= unique id < cols */
	int		  vert; /* width of preceding vertical line */
	struct tbl_head	 *next;
	struct tbl_head	 *prev;
};

enum	tbl_cellt {
	TBL_CELL_CENTRE, /* c, C */
	TBL_CELL_RIGHT, /* r, R */
	TBL_CELL_LEFT, /* l, L */
	TBL_CELL_NUMBER, /* n, N */
	TBL_CELL_SPAN, /* s, S */
	TBL_CELL_LONG, /* a, A */
	TBL_CELL_DOWN, /* ^ */
	TBL_CELL_HORIZ, /* _, - */
	TBL_CELL_DHORIZ, /* = */
	TBL_CELL_MAX
};

/*
 * A cell in a layout row.
 */
struct	tbl_cell {
	struct tbl_cell	 *next;
	int		  vert; /* width of preceding vertical line */
	enum tbl_cellt	  pos;
	size_t		  spacing;
	int		  flags;
#define	TBL_CELL_TALIGN	 (1 << 0) /* t, T */
#define	TBL_CELL_BALIGN	 (1 << 1) /* d, D */
#define	TBL_CELL_BOLD	 (1 << 2) /* fB, B, b */
#define	TBL_CELL_ITALIC	 (1 << 3) /* fI, I, i */
#define	TBL_CELL_EQUAL	 (1 << 4) /* e, E */
#define	TBL_CELL_UP	 (1 << 5) /* u, U */
#define	TBL_CELL_WIGN	 (1 << 6) /* z, Z */
	struct tbl_head	 *head;
};

/*
 * A layout row.
 */
struct	tbl_row {
	struct tbl_row	 *next;
	struct tbl_cell	 *first;
	struct tbl_cell	 *last;
};

enum	tbl_datt {
	TBL_DATA_NONE, /* has no data */
	TBL_DATA_DATA, /* consists of data/string */
	TBL_DATA_HORIZ, /* horizontal line */
	TBL_DATA_DHORIZ, /* double-horizontal line */
	TBL_DATA_NHORIZ, /* squeezed horizontal line */
	TBL_DATA_NDHORIZ /* squeezed double-horizontal line */
};

/*
 * A cell within a row of data.  The "string" field contains the actual
 * string value that's in the cell.  The rest is layout.
 */
struct	tbl_dat {
	struct tbl_cell	 *layout; /* layout cell */
	int		  spans; /* how many spans follow */
	struct tbl_dat	 *next;
	char		 *string; /* data (NULL if not TBL_DATA_DATA) */
	enum tbl_datt	  pos;
};

enum	tbl_spant {
	TBL_SPAN_DATA, /* span consists of data */
	TBL_SPAN_HORIZ, /* span is horizontal line */
	TBL_SPAN_DHORIZ /* span is double horizontal line */
};

/*
 * A row of data in a table.
 */
struct	tbl_span {
	struct tbl_opts	 *opts;
	struct tbl_head	 *head;
	struct tbl_row	 *layout; /* layout row */
	struct tbl_dat	 *first;
	struct tbl_dat	 *last;
	int		  line; /* parse line */
	int		  flags;
#define	TBL_SPAN_FIRST	 (1 << 0)
#define	TBL_SPAN_LAST	 (1 << 1)
	enum tbl_spant	  pos;
	struct tbl_span	 *next;
};

enum	eqn_boxt {
	EQN_ROOT, /* root of parse tree */
	EQN_TEXT, /* text (number, variable, whatever) */
	EQN_SUBEXPR, /* nested `eqn' subexpression */
	EQN_LIST, /* subexpressions list */
	EQN_MATRIX /* matrix subexpression */
};

enum	eqn_markt {
	EQNMARK_NONE = 0,
	EQNMARK_DOT,
	EQNMARK_DOTDOT,
	EQNMARK_HAT,
	EQNMARK_TILDE,
	EQNMARK_VEC,
	EQNMARK_DYAD,
	EQNMARK_BAR,
	EQNMARK_UNDER,
	EQNMARK__MAX
};

enum	eqn_fontt {
	EQNFONT_NONE = 0,
	EQNFONT_ROMAN,
	EQNFONT_BOLD,
	EQNFONT_FAT,
	EQNFONT_ITALIC,
	EQNFONT__MAX
};

enum	eqn_post {
	EQNPOS_NONE = 0,
	EQNPOS_OVER,
	EQNPOS_SUP,
	EQNPOS_SUB,
	EQNPOS_TO,
	EQNPOS_FROM,
	EQNPOS__MAX
};

enum	eqn_pilet {
	EQNPILE_NONE = 0,
	EQNPILE_PILE,
	EQNPILE_CPILE,
	EQNPILE_RPILE,
	EQNPILE_LPILE,
	EQNPILE_COL,
	EQNPILE_CCOL,
	EQNPILE_RCOL,
	EQNPILE_LCOL,
	EQNPILE__MAX
};

 /*
 * A "box" is a parsed mathematical expression as defined by the eqn.7
 * grammar.
 */
struct	eqn_box {
	int		  size; /* font size of expression */
#define	EQN_DEFSIZE	  INT_MIN
	enum eqn_boxt	  type; /* type of node */
	struct eqn_box	 *first; /* first child node */
	struct eqn_box	 *last; /* last child node */
	struct eqn_box	 *next; /* node sibling */
	struct eqn_box	 *parent; /* node sibling */
	char		 *text; /* text (or NULL) */
	char		 *left;
	char		 *right;
	enum eqn_post	  pos; /* position of next box */
	enum eqn_markt	  mark; /* a mark about the box */
	enum eqn_fontt	  font; /* font of box */
	enum eqn_pilet	  pile; /* equation piling */
};

/*
 * An equation consists of a tree of expressions starting at a given
 * line and position. 
 */
struct	eqn {
	char		 *name; /* identifier (or NULL) */
	struct eqn_box	 *root; /* root mathematical expression */
	int		  ln; /* invocation line */
	int		  pos; /* invocation position */
};

/*
 * The type of parse sequence.  This value is usually passed via the
 * mandoc(1) command line of -man and -mdoc.  It's almost exclusively
 * -mandoc but the others have been retained for compatibility.
 */
enum	mparset {
	MPARSE_AUTO, /* magically determine the document type */
	MPARSE_MDOC, /* assume -mdoc */
	MPARSE_MAN /* assume -man */
};

enum	mandoc_esc {
	ESCAPE_ERROR = 0, /* bail! unparsable escape */
	ESCAPE_IGNORE, /* escape to be ignored */
	ESCAPE_SPECIAL, /* a regular special character */
	ESCAPE_FONT, /* a generic font mode */
	ESCAPE_FONTBOLD, /* bold font mode */
	ESCAPE_FONTITALIC, /* italic font mode */
	ESCAPE_FONTBI, /* bold italic font mode */
	ESCAPE_FONTROMAN, /* roman font mode */
	ESCAPE_FONTPREV, /* previous font mode */
	ESCAPE_NUMBERED, /* a numbered glyph */
	ESCAPE_UNICODE, /* a unicode codepoint */
	ESCAPE_NOSPACE, /* suppress space if the last on a line */
	ESCAPE_SKIPCHAR /* skip the next character */
};

typedef	void	(*mandocmsg)(enum mandocerr, enum mandoclevel,
			const char *, int, int, const char *);

struct	mparse;
struct	mchars;
struct	mdoc;
struct	man;

__BEGIN_DECLS

void		 *mandoc_calloc(size_t, size_t);
enum mandoc_esc	  mandoc_escape(const char **, const char **, int *);
void		 *mandoc_malloc(size_t);
void		 *mandoc_realloc(void *, size_t);
char		 *mandoc_strdup(const char *);
char		 *mandoc_strndup(const char *, size_t);
struct mchars	 *mchars_alloc(void);
void		  mchars_free(struct mchars *);
char	 	  mchars_num2char(const char *, size_t);
int		  mchars_num2uc(const char *, size_t);
int		  mchars_spec2cp(const struct mchars *, 
			const char *, size_t);
const char	 *mchars_spec2str(const struct mchars *, 
			const char *, size_t, size_t *);
struct mparse	 *mparse_alloc(enum mparset, enum mandoclevel,
			mandocmsg, void *, char *);
void		  mparse_free(struct mparse *);
void		  mparse_keep(struct mparse *);
enum mandoclevel  mparse_readfd(struct mparse *, int, const char *);
enum mandoclevel  mparse_readmem(struct mparse *, const void *, size_t,
			const char *);
void		  mparse_reset(struct mparse *);
void		  mparse_result(struct mparse *, 
			struct mdoc **, struct man **);
const char	 *mparse_getkeep(const struct mparse *);
const char	 *mparse_strerror(enum mandocerr);
const char	 *mparse_strlevel(enum mandoclevel);

__END_DECLS

#endif /*!MANDOC_H*/