mandoc.h

   1 /*      $Id: mandoc.h,v 1.163 2014/10/14 02:16:06 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2010, 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifndef MANDOC_H
  19 #define MANDOC_H
  20
  21 #define ASCII_NBRSP      31  /* non-breaking space */
  22 #define ASCII_HYPH       30  /* breakable hyphen */
  23 #define ASCII_BREAK      29  /* breakable zero-width space */
  24
  25 /*
  26  * Status level.  This refers to both internal status (i.e., whilst
  27  * running, when warnings/errors are reported) and an indicator of a
  28  * threshold of when to halt (when said internal state exceeds the
  29  * threshold).
  30  */
  31 enum    mandoclevel {
  32         MANDOCLEVEL_OK = 0,
  33         MANDOCLEVEL_RESERVED,
  34         MANDOCLEVEL_WARNING, /* warnings: syntax, whitespace, etc. */
  35         MANDOCLEVEL_ERROR, /* input has been thrown away */
  36         MANDOCLEVEL_FATAL, /* input is borked */
  37         MANDOCLEVEL_BADARG, /* bad argument in invocation */
  38         MANDOCLEVEL_SYSERR, /* system error */
  39         MANDOCLEVEL_MAX
  40 };
  41
  42 /*
  43  * All possible things that can go wrong within a parse, be it libroff,
  44  * libmdoc, or libman.
  45  */
  46 enum    mandocerr {
  47         MANDOCERR_OK,
  48
  49         MANDOCERR_WARNING, /* ===== start of warnings ===== */
  50
  51         /* related to the prologue */
  52         MANDOCERR_DT_NOTITLE, /* missing manual title, using UNTITLED: line */
  53         MANDOCERR_TH_NOTITLE, /* missing manual title, using "": [macro] */
  54         MANDOCERR_TITLE_CASE, /* lower case character in document title */
  55         MANDOCERR_MSEC_MISSING, /* missing manual section, using "": macro */
  56         MANDOCERR_MSEC_BAD, /* unknown manual section: Dt ... section */
  57         MANDOCERR_ARCH_BAD, /* unknown manual volume or arch: Dt ... volume */
  58         MANDOCERR_DATE_MISSING, /* missing date, using today's date */
  59         MANDOCERR_DATE_BAD, /* cannot parse date, using it verbatim: date */
  60         MANDOCERR_OS_MISSING, /* missing Os macro, using "" */
  61         MANDOCERR_PROLOG_REP, /* duplicate prologue macro: macro */
  62         MANDOCERR_PROLOG_LATE, /* late prologue macro: macro */
  63         MANDOCERR_DT_LATE, /* skipping late title macro: Dt args */
  64         MANDOCERR_PROLOG_ORDER, /* prologue macros out of order: macros */
  65
  66         /* related to document structure */
  67         MANDOCERR_SO, /* .so is fragile, better use ln(1): so path */
  68         MANDOCERR_DOC_EMPTY, /* no document body */
  69         MANDOCERR_SEC_BEFORE, /* content before first section header: macro */
  70         MANDOCERR_NAMESEC_FIRST, /* first section is not NAME: Sh title */
  71         MANDOCERR_NAMESEC_BAD, /* bad NAME section contents: macro */
  72         MANDOCERR_SEC_ORDER, /* sections out of conventional order: Sh title */
  73         MANDOCERR_SEC_REP, /* duplicate section title: Sh title */
  74         MANDOCERR_SEC_MSEC, /* unexpected section: Sh title for ... only */
  75         MANDOCERR_XR_ORDER, /* unusual Xr order: ... after ... */
  76         MANDOCERR_XR_PUNCT, /* unusual Xr punctuation: ... after ... */
  77         MANDOCERR_AN_MISSING, /* AUTHORS section without An macro */
  78
  79         /* related to macros and nesting */
  80         MANDOCERR_MACRO_OBS, /* obsolete macro: macro */
  81         MANDOCERR_PAR_SKIP, /* skipping paragraph macro: macro ... */
  82         MANDOCERR_PAR_MOVE, /* moving paragraph macro out of list: macro */
  83         MANDOCERR_NS_SKIP, /* skipping no-space macro */
  84         MANDOCERR_BLK_NEST, /* blocks badly nested: macro ... */
  85         MANDOCERR_BD_NEST, /* nested displays are not portable: macro ... */
  86         MANDOCERR_BL_MOVE, /* moving content out of list: macro */
  87         MANDOCERR_VT_CHILD, /* .Vt block has child macro: macro */
  88         MANDOCERR_FI_SKIP, /* fill mode already enabled, skipping: fi */
  89         MANDOCERR_NF_SKIP, /* fill mode already disabled, skipping: nf */
  90         MANDOCERR_BLK_LINE, /* line scope broken: macro breaks macro */
  91
  92         /* related to missing arguments */
  93         MANDOCERR_REQ_EMPTY, /* skipping empty request: request */
  94         MANDOCERR_COND_EMPTY, /* conditional request controls empty scope */
  95         MANDOCERR_MACRO_EMPTY, /* skipping empty macro: macro */
  96         MANDOCERR_ARG_EMPTY, /* empty argument, using 0n: macro arg */
  97         MANDOCERR_ARGCWARN, /* argument count wrong */
  98         MANDOCERR_BD_NOTYPE, /* missing display type, using -ragged: Bd */
  99         MANDOCERR_BL_LATETYPE, /* list type is not the first argument: Bl arg */
 100         MANDOCERR_BL_NOWIDTH, /* missing -width in -tag list, using 8n */
 101         MANDOCERR_EX_NONAME, /* missing utility name, using "": Ex */
 102         MANDOCERR_IT_NOHEAD, /* empty head in list item: Bl -type It */
 103         MANDOCERR_IT_NOBODY, /* empty list item: Bl -type It */
 104         MANDOCERR_BF_NOFONT, /* missing font type, using \fR: Bf */
 105         MANDOCERR_BF_BADFONT, /* unknown font type, using \fR: Bf font */
 106         MANDOCERR_ARG_STD, /* missing -std argument, adding it: macro */
 107         MANDOCERR_EQN_NOBOX, /* missing eqn box, using "": op */
 108
 109         /* related to bad arguments */
 110         MANDOCERR_ARG_QUOTE, /* unterminated quoted argument */
 111         MANDOCERR_ARG_REP, /* duplicate argument: macro arg */
 112         MANDOCERR_AN_REP, /* skipping duplicate argument: An -arg */
 113         MANDOCERR_BD_REP, /* skipping duplicate display type: Bd -type */
 114         MANDOCERR_BL_REP, /* skipping duplicate list type: Bl -type */
 115         MANDOCERR_BL_SKIPW, /* skipping -width argument: Bl -type */
 116         MANDOCERR_AT_BAD, /* unknown AT&T UNIX version: At version */
 117         MANDOCERR_FA_COMMA, /* comma in function argument: arg */
 118         MANDOCERR_FN_PAREN, /* parenthesis in function name: arg */
 119         MANDOCERR_RS_BAD, /* invalid content in Rs block: macro */
 120         MANDOCERR_SM_BAD, /* invalid Boolean argument: macro arg */
 121         MANDOCERR_FT_BAD, /* unknown font, skipping request: ft font */
 122
 123         /* related to plain text */
 124         MANDOCERR_FI_BLANK, /* blank line in fill mode, using .sp */
 125         MANDOCERR_FI_TAB, /* tab in filled text */
 126         MANDOCERR_SPACE_EOL, /* whitespace at end of input line */
 127         MANDOCERR_COMMENT_BAD, /* bad comment style */
 128         MANDOCERR_ESC_BAD, /* invalid escape sequence: esc */
 129         MANDOCERR_STR_UNDEF, /* undefined string, using "": name */
 130
 131         MANDOCERR_ERROR, /* ===== start of errors ===== */
 132
 133         /* related to equations */
 134         MANDOCERR_EQNNSCOPE, /* unexpected equation scope closure*/
 135         MANDOCERR_EQNSCOPE, /* equation scope open on exit */
 136         MANDOCERR_EQNBADSCOPE, /* overlapping equation scopes */
 137         MANDOCERR_EQNEOF, /* unexpected end of equation */
 138
 139         /* related to tables */
 140         MANDOCERR_TBL, /* bad table syntax */
 141         MANDOCERR_TBLOPT, /* bad table option */
 142         MANDOCERR_TBLLAYOUT, /* bad table layout */
 143         MANDOCERR_TBLNOLAYOUT, /* no table layout cells specified */
 144         MANDOCERR_TBLNODATA, /* no table data cells specified */
 145         MANDOCERR_TBLIGNDATA, /* ignore data in cell */
 146         MANDOCERR_TBLBLOCK, /* data block still open */
 147         MANDOCERR_TBLEXTRADAT, /* ignoring extra data cells */
 148
 149         /* related to document structure and macros */
 150         MANDOCERR_ROFFLOOP, /* input stack limit exceeded, infinite loop? */
 151         MANDOCERR_BADCHAR, /* skipping bad character: number */
 152         MANDOCERR_MACRO, /* skipping unknown macro: macro */
 153         MANDOCERR_IT_STRAY, /* skipping item outside list: It ... */
 154         MANDOCERR_TA_STRAY, /* skipping column outside column list: Ta */
 155         MANDOCERR_BLK_NOTOPEN, /* skipping end of block that is not open */
 156         MANDOCERR_BLK_BROKEN, /* inserting missing end of block: macro ... */
 157         MANDOCERR_BLK_NOEND, /* appending missing end of block: macro */
 158
 159         /* related to request and macro arguments */
 160         MANDOCERR_NAMESC, /* escaped character not allowed in a name: name */
 161         MANDOCERR_ARGCOUNT, /* argument count wrong */
 162         MANDOCERR_BL_NOTYPE, /* missing list type, using -item: Bl */
 163         MANDOCERR_NM_NONAME, /* missing manual name, using "": Nm */
 164         MANDOCERR_OS_UNAME, /* uname(3) system call failed, using UNKNOWN */
 165         MANDOCERR_ST_BAD, /* unknown standard specifier: St standard */
 166         MANDOCERR_IT_NONUM, /* skipping request without numeric argument */
 167         MANDOCERR_ARG_SKIP, /* skipping all arguments: macro args */
 168         MANDOCERR_ARG_EXCESS, /* skipping excess arguments: macro ... args */
 169
 170         MANDOCERR_FATAL, /* ===== start of fatal errors ===== */
 171
 172         MANDOCERR_TOOLARGE, /* input too large */
 173         MANDOCERR_BD_FILE, /* NOT IMPLEMENTED: Bd -file */
 174         MANDOCERR_SO_PATH, /* NOT IMPLEMENTED: .so with absolute path or ".." */
 175         MANDOCERR_SO_FAIL, /* .so request failed */
 176
 177         /* ===== system errors ===== */
 178
 179         MANDOCERR_SYSDUP, /* cannot dup file descriptor */
 180         MANDOCERR_SYSEXEC, /* cannot exec */
 181         MANDOCERR_SYSEXIT, /* gunzip failed with code */
 182         MANDOCERR_SYSFORK, /* cannot fork */
 183         MANDOCERR_SYSOPEN, /* cannot open file */
 184         MANDOCERR_SYSPIPE, /* cannot open pipe */
 185         MANDOCERR_SYSREAD, /* cannot read file */
 186         MANDOCERR_SYSSIG, /* gunzip died from signal */
 187         MANDOCERR_SYSSTAT, /* cannot stat file */
 188         MANDOCERR_SYSWAIT, /* wait failed */
 189
 190         MANDOCERR_MAX
 191 };
 192
 193 struct  tbl_opts {
 194         char              tab; /* cell-separator */
 195         char              decimal; /* decimal point */
 196         int               linesize;
 197         int               opts;
 198 #define TBL_OPT_CENTRE   (1 << 0)
 199 #define TBL_OPT_EXPAND   (1 << 1)
 200 #define TBL_OPT_BOX      (1 << 2)
 201 #define TBL_OPT_DBOX     (1 << 3)
 202 #define TBL_OPT_ALLBOX   (1 << 4)
 203 #define TBL_OPT_NOKEEP   (1 << 5)
 204 #define TBL_OPT_NOSPACE  (1 << 6)
 205         int               cols; /* number of columns */
 206 };
 207
 208 /*
 209  * The head of a table specifies all of its columns.  When formatting a
 210  * tbl_span, iterate over these and plug in data from the tbl_span when
 211  * appropriate, using tbl_cell as a guide to placement.
 212  */
 213 struct  tbl_head {
 214         int               ident; /* 0 <= unique id < cols */
 215         int               vert; /* width of preceding vertical line */
 216         struct tbl_head  *next;
 217         struct tbl_head  *prev;
 218 };
 219
 220 enum    tbl_cellt {
 221         TBL_CELL_CENTRE, /* c, C */
 222         TBL_CELL_RIGHT, /* r, R */
 223         TBL_CELL_LEFT, /* l, L */
 224         TBL_CELL_NUMBER, /* n, N */
 225         TBL_CELL_SPAN, /* s, S */
 226         TBL_CELL_LONG, /* a, A */
 227         TBL_CELL_DOWN, /* ^ */
 228         TBL_CELL_HORIZ, /* _, - */
 229         TBL_CELL_DHORIZ, /* = */
 230         TBL_CELL_MAX
 231 };
 232
 233 /*
 234  * A cell in a layout row.
 235  */
 236 struct  tbl_cell {
 237         struct tbl_cell  *next;
 238         int               vert; /* width of preceding vertical line */
 239         enum tbl_cellt    pos;
 240         size_t            spacing;
 241         int               flags;
 242 #define TBL_CELL_TALIGN  (1 << 0) /* t, T */
 243 #define TBL_CELL_BALIGN  (1 << 1) /* d, D */
 244 #define TBL_CELL_BOLD    (1 << 2) /* fB, B, b */
 245 #define TBL_CELL_ITALIC  (1 << 3) /* fI, I, i */
 246 #define TBL_CELL_EQUAL   (1 << 4) /* e, E */
 247 #define TBL_CELL_UP      (1 << 5) /* u, U */
 248 #define TBL_CELL_WIGN    (1 << 6) /* z, Z */
 249 #define TBL_CELL_WMAX    (1 << 7) /* x, X */
 250         struct tbl_head  *head;
 251 };
 252
 253 /*
 254  * A layout row.
 255  */
 256 struct  tbl_row {
 257         struct tbl_row   *next;
 258         struct tbl_cell  *first;
 259         struct tbl_cell  *last;
 260         int               vert; /* trailing vertical line */
 261 };
 262
 263 enum    tbl_datt {
 264         TBL_DATA_NONE, /* has no data */
 265         TBL_DATA_DATA, /* consists of data/string */
 266         TBL_DATA_HORIZ, /* horizontal line */
 267         TBL_DATA_DHORIZ, /* double-horizontal line */
 268         TBL_DATA_NHORIZ, /* squeezed horizontal line */
 269         TBL_DATA_NDHORIZ /* squeezed double-horizontal line */
 270 };
 271
 272 /*
 273  * A cell within a row of data.  The "string" field contains the actual
 274  * string value that's in the cell.  The rest is layout.
 275  */
 276 struct  tbl_dat {
 277         struct tbl_cell  *layout; /* layout cell */
 278         int               spans; /* how many spans follow */
 279         struct tbl_dat   *next;
 280         char             *string; /* data (NULL if not TBL_DATA_DATA) */
 281         enum tbl_datt     pos;
 282 };
 283
 284 enum    tbl_spant {
 285         TBL_SPAN_DATA, /* span consists of data */
 286         TBL_SPAN_HORIZ, /* span is horizontal line */
 287         TBL_SPAN_DHORIZ /* span is double horizontal line */
 288 };
 289
 290 /*
 291  * A row of data in a table.
 292  */
 293 struct  tbl_span {
 294         struct tbl_opts  *opts;
 295         struct tbl_head  *head;
 296         struct tbl_row   *layout; /* layout row */
 297         struct tbl_dat   *first;
 298         struct tbl_dat   *last;
 299         int               line; /* parse line */
 300         int               flags;
 301 #define TBL_SPAN_FIRST   (1 << 0)
 302 #define TBL_SPAN_LAST    (1 << 1)
 303         enum tbl_spant    pos;
 304         struct tbl_span  *next;
 305 };
 306
 307 enum    eqn_boxt {
 308         EQN_ROOT, /* root of parse tree */
 309         EQN_TEXT, /* text (number, variable, whatever) */
 310         EQN_SUBEXPR, /* nested `eqn' subexpression */
 311         EQN_LIST, /* list (braces, etc.) */
 312         EQN_LISTONE, /* singleton list */
 313         EQN_PILE, /* vertical pile */
 314         EQN_MATRIX /* pile of piles */
 315 };
 316
 317 enum    eqn_fontt {
 318         EQNFONT_NONE = 0,
 319         EQNFONT_ROMAN,
 320         EQNFONT_BOLD,
 321         EQNFONT_FAT,
 322         EQNFONT_ITALIC,
 323         EQNFONT__MAX
 324 };
 325
 326 enum    eqn_post {
 327         EQNPOS_NONE = 0,
 328         EQNPOS_SUP,
 329         EQNPOS_SUBSUP,
 330         EQNPOS_SUB,
 331         EQNPOS_TO,
 332         EQNPOS_FROM,
 333         EQNPOS_FROMTO,
 334         EQNPOS_OVER,
 335         EQNPOS_SQRT,
 336         EQNPOS__MAX
 337 };
 338
 339 enum    eqn_pilet {
 340         EQNPILE_NONE = 0,
 341         EQNPILE_PILE,
 342         EQNPILE_CPILE,
 343         EQNPILE_RPILE,
 344         EQNPILE_LPILE,
 345         EQNPILE_COL,
 346         EQNPILE_CCOL,
 347         EQNPILE_RCOL,
 348         EQNPILE_LCOL,
 349         EQNPILE__MAX
 350 };
 351
 352  /*
 353  * A "box" is a parsed mathematical expression as defined by the eqn.7
 354  * grammar.
 355  */
 356 struct  eqn_box {
 357         int               size; /* font size of expression */
 358 #define EQN_DEFSIZE       INT_MIN
 359         enum eqn_boxt     type; /* type of node */
 360         struct eqn_box   *first; /* first child node */
 361         struct eqn_box   *last; /* last child node */
 362         struct eqn_box   *next; /* node sibling */
 363         struct eqn_box   *prev; /* node sibling */
 364         struct eqn_box   *parent; /* node sibling */
 365         char             *text; /* text (or NULL) */
 366         char             *left; /* fence left-hand */
 367         char             *right; /* fence right-hand */
 368         char             *top; /* expression over-symbol */
 369         char             *bottom; /* expression under-symbol */
 370         size_t            args; /* arguments in parent */
 371         size_t            expectargs; /* max arguments in parent */
 372         enum eqn_post     pos; /* position of next box */
 373         enum eqn_fontt    font; /* font of box */
 374         enum eqn_pilet    pile; /* equation piling */
 375 };
 376
 377 /*
 378  * An equation consists of a tree of expressions starting at a given
 379  * line and position.
 380  */
 381 struct  eqn {
 382         char             *name; /* identifier (or NULL) */
 383         struct eqn_box   *root; /* root mathematical expression */
 384         int               ln; /* invocation line */
 385         int               pos; /* invocation position */
 386 };
 387
 388 /*
 389  * Parse options.
 390  */
 391 #define MPARSE_MDOC     1  /* assume -mdoc */
 392 #define MPARSE_MAN      2  /* assume -man */
 393 #define MPARSE_SO       4  /* honour .so requests */
 394 #define MPARSE_QUICK    8  /* abort the parse early */
 395
 396 enum    mandoc_esc {
 397         ESCAPE_ERROR = 0, /* bail! unparsable escape */
 398         ESCAPE_IGNORE, /* escape to be ignored */
 399         ESCAPE_SPECIAL, /* a regular special character */
 400         ESCAPE_FONT, /* a generic font mode */
 401         ESCAPE_FONTBOLD, /* bold font mode */
 402         ESCAPE_FONTITALIC, /* italic font mode */
 403         ESCAPE_FONTBI, /* bold italic font mode */
 404         ESCAPE_FONTROMAN, /* roman font mode */
 405         ESCAPE_FONTPREV, /* previous font mode */
 406         ESCAPE_NUMBERED, /* a numbered glyph */
 407         ESCAPE_UNICODE, /* a unicode codepoint */
 408         ESCAPE_NOSPACE, /* suppress space if the last on a line */
 409         ESCAPE_SKIPCHAR /* skip the next character */
 410 };
 411
 412 typedef void    (*mandocmsg)(enum mandocerr, enum mandoclevel,
 413                         const char *, int, int, const char *);
 414
 415 struct  mparse;
 416 struct  mchars;
 417 struct  mdoc;
 418 struct  man;
 419
 420 __BEGIN_DECLS
 421
 422 enum mandoc_esc   mandoc_escape(const char **, const char **, int *);
 423 struct mchars    *mchars_alloc(void);
 424 void              mchars_free(struct mchars *);
 425 char              mchars_num2char(const char *, size_t);
 426 int               mchars_num2uc(const char *, size_t);
 427 int               mchars_spec2cp(const struct mchars *,
 428                         const char *, size_t);
 429 const char       *mchars_spec2str(const struct mchars *,
 430                         const char *, size_t, size_t *);
 431 struct mparse    *mparse_alloc(int, enum mandoclevel, mandocmsg,
 432                         const char *);
 433 void              mparse_free(struct mparse *);
 434 void              mparse_keep(struct mparse *);
 435 enum mandoclevel  mparse_open(struct mparse *, int *, const char *,
 436                         pid_t *);
 437 enum mandoclevel  mparse_readfd(struct mparse *, int, const char *);
 438 enum mandoclevel  mparse_readmem(struct mparse *, const void *, size_t,
 439                         const char *);
 440 void              mparse_reset(struct mparse *);
 441 void              mparse_result(struct mparse *,
 442                         struct mdoc **, struct man **, char **);
 443 const char       *mparse_getkeep(const struct mparse *);
 444 const char       *mparse_strerror(enum mandocerr);
 445 const char       *mparse_strlevel(enum mandoclevel);
 446 enum mandoclevel  mparse_wait(struct mparse *, pid_t);
 447
 448 __END_DECLS
 449
 450 #endif /*!MANDOC_H*/