diff options
Diffstat (limited to 'contrib/mdocml/tbl_opts.c')
-rw-r--r-- | contrib/mdocml/tbl_opts.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/contrib/mdocml/tbl_opts.c b/contrib/mdocml/tbl_opts.c new file mode 100644 index 0000000..5bd67f8 --- /dev/null +++ b/contrib/mdocml/tbl_opts.c @@ -0,0 +1,270 @@ +/* $Id: tbl_opts.c,v 1.12 2011/09/18 14:14:15 schwarze Exp $ */ +/* + * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv> + * + * 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. + */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "mandoc.h" +#include "libmandoc.h" +#include "libroff.h" + +enum tbl_ident { + KEY_CENTRE = 0, + KEY_DELIM, + KEY_EXPAND, + KEY_BOX, + KEY_DBOX, + KEY_ALLBOX, + KEY_TAB, + KEY_LINESIZE, + KEY_NOKEEP, + KEY_DPOINT, + KEY_NOSPACE, + KEY_FRAME, + KEY_DFRAME, + KEY_MAX +}; + +struct tbl_phrase { + const char *name; + int key; + enum tbl_ident ident; +}; + +/* Handle Commonwealth/American spellings. */ +#define KEY_MAXKEYS 14 + +/* Maximum length of key name string. */ +#define KEY_MAXNAME 13 + +/* Maximum length of key number size. */ +#define KEY_MAXNUMSZ 10 + +static const struct tbl_phrase keys[KEY_MAXKEYS] = { + { "center", TBL_OPT_CENTRE, KEY_CENTRE}, + { "centre", TBL_OPT_CENTRE, KEY_CENTRE}, + { "delim", 0, KEY_DELIM}, + { "expand", TBL_OPT_EXPAND, KEY_EXPAND}, + { "box", TBL_OPT_BOX, KEY_BOX}, + { "doublebox", TBL_OPT_DBOX, KEY_DBOX}, + { "allbox", TBL_OPT_ALLBOX, KEY_ALLBOX}, + { "frame", TBL_OPT_BOX, KEY_FRAME}, + { "doubleframe", TBL_OPT_DBOX, KEY_DFRAME}, + { "tab", 0, KEY_TAB}, + { "linesize", 0, KEY_LINESIZE}, + { "nokeep", TBL_OPT_NOKEEP, KEY_NOKEEP}, + { "decimalpoint", 0, KEY_DPOINT}, + { "nospaces", TBL_OPT_NOSPACE, KEY_NOSPACE}, +}; + +static int arg(struct tbl_node *, int, + const char *, int *, enum tbl_ident); +static void opt(struct tbl_node *, int, + const char *, int *); + +static int +arg(struct tbl_node *tbl, int ln, const char *p, int *pos, enum tbl_ident key) +{ + int i; + char buf[KEY_MAXNUMSZ]; + + while (isspace((unsigned char)p[*pos])) + (*pos)++; + + /* Arguments always begin with a parenthesis. */ + + if ('(' != p[*pos]) { + mandoc_msg(MANDOCERR_TBL, tbl->parse, + ln, *pos, NULL); + return(0); + } + + (*pos)++; + + /* + * The arguments can be ANY value, so we can't just stop at the + * next close parenthesis (the argument can be a closed + * parenthesis itself). + */ + + switch (key) { + case (KEY_DELIM): + if ('\0' == p[(*pos)++]) { + mandoc_msg(MANDOCERR_TBL, tbl->parse, + ln, *pos - 1, NULL); + return(0); + } + + if ('\0' == p[(*pos)++]) { + mandoc_msg(MANDOCERR_TBL, tbl->parse, + ln, *pos - 1, NULL); + return(0); + } + break; + case (KEY_TAB): + if ('\0' != (tbl->opts.tab = p[(*pos)++])) + break; + + mandoc_msg(MANDOCERR_TBL, tbl->parse, + ln, *pos - 1, NULL); + return(0); + case (KEY_LINESIZE): + for (i = 0; i < KEY_MAXNUMSZ && p[*pos]; i++, (*pos)++) { + buf[i] = p[*pos]; + if ( ! isdigit((unsigned char)buf[i])) + break; + } + + if (i < KEY_MAXNUMSZ) { + buf[i] = '\0'; + tbl->opts.linesize = atoi(buf); + break; + } + + mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, *pos, NULL); + return(0); + case (KEY_DPOINT): + if ('\0' != (tbl->opts.decimal = p[(*pos)++])) + break; + + mandoc_msg(MANDOCERR_TBL, tbl->parse, + ln, *pos - 1, NULL); + return(0); + default: + abort(); + /* NOTREACHED */ + } + + /* End with a close parenthesis. */ + + if (')' == p[(*pos)++]) + return(1); + + mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, *pos - 1, NULL); + return(0); +} + +static void +opt(struct tbl_node *tbl, int ln, const char *p, int *pos) +{ + int i, sv; + char buf[KEY_MAXNAME]; + + /* + * Parse individual options from the stream as surrounded by + * this goto. Each pass through the routine parses out a single + * option and registers it. Option arguments are processed in + * the arg() function. + */ + +again: /* + * EBNF describing this section: + * + * options ::= option_list [:space:]* [;][\n] + * option_list ::= option option_tail + * option_tail ::= [:space:]+ option_list | + * ::= epsilon + * option ::= [:alpha:]+ args + * args ::= [:space:]* [(] [:alpha:]+ [)] + */ + + while (isspace((unsigned char)p[*pos])) + (*pos)++; + + /* Safe exit point. */ + + if (';' == p[*pos]) + return; + + /* Copy up to first non-alpha character. */ + + for (sv = *pos, i = 0; i < KEY_MAXNAME; i++, (*pos)++) { + buf[i] = (char)tolower((unsigned char)p[*pos]); + if ( ! isalpha((unsigned char)buf[i])) + break; + } + + /* Exit if buffer is empty (or overrun). */ + + if (KEY_MAXNAME == i || 0 == i) { + mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, *pos, NULL); + return; + } + + buf[i] = '\0'; + + while (isspace((unsigned char)p[*pos])) + (*pos)++; + + /* + * Look through all of the available keys to find one that + * matches the input. FIXME: hashtable this. + */ + + for (i = 0; i < KEY_MAXKEYS; i++) { + if (strcmp(buf, keys[i].name)) + continue; + + /* + * Note: this is more difficult to recover from, as we + * can be anywhere in the option sequence and it's + * harder to jump to the next. Meanwhile, just bail out + * of the sequence altogether. + */ + + if (keys[i].key) + tbl->opts.opts |= keys[i].key; + else if ( ! arg(tbl, ln, p, pos, keys[i].ident)) + return; + + break; + } + + /* + * Allow us to recover from bad options by continuing to another + * parse sequence. + */ + + if (KEY_MAXKEYS == i) + mandoc_msg(MANDOCERR_TBLOPT, tbl->parse, ln, sv, NULL); + + goto again; + /* NOTREACHED */ +} + +int +tbl_option(struct tbl_node *tbl, int ln, const char *p) +{ + int pos; + + /* + * Table options are always on just one line, so automatically + * switch into the next input mode here. + */ + tbl->part = TBL_PART_LAYOUT; + + pos = 0; + opt(tbl, ln, p, &pos); + + /* Always succeed. */ + return(1); +} |