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1.4 ! schwarze 1: /* $Id: tbl_opts.c,v 1.3 2011/04/21 22:59:54 schwarze Exp $ */
1.1 schwarze 2: /*
1.2 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 schwarze 4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #include <ctype.h>
18: #include <stdio.h>
19: #include <stdlib.h>
20: #include <string.h>
21:
22: #include "mandoc.h"
1.4 ! schwarze 23: #include "libmandoc.h"
1.1 schwarze 24: #include "libroff.h"
25:
26: enum tbl_ident {
27: KEY_CENTRE = 0,
28: KEY_DELIM,
29: KEY_EXPAND,
30: KEY_BOX,
31: KEY_DBOX,
32: KEY_ALLBOX,
33: KEY_TAB,
34: KEY_LINESIZE,
35: KEY_NOKEEP,
36: KEY_DPOINT,
37: KEY_NOSPACE,
38: KEY_FRAME,
39: KEY_DFRAME,
40: KEY_MAX
41: };
42:
43: struct tbl_phrase {
44: const char *name;
45: int key;
46: enum tbl_ident ident;
47: };
48:
49: /* Handle Commonwealth/American spellings. */
50: #define KEY_MAXKEYS 14
51:
52: /* Maximum length of key name string. */
53: #define KEY_MAXNAME 13
54:
55: /* Maximum length of key number size. */
56: #define KEY_MAXNUMSZ 10
57:
58: static const struct tbl_phrase keys[KEY_MAXKEYS] = {
59: { "center", TBL_OPT_CENTRE, KEY_CENTRE},
60: { "centre", TBL_OPT_CENTRE, KEY_CENTRE},
61: { "delim", 0, KEY_DELIM},
62: { "expand", TBL_OPT_EXPAND, KEY_EXPAND},
63: { "box", TBL_OPT_BOX, KEY_BOX},
64: { "doublebox", TBL_OPT_DBOX, KEY_DBOX},
65: { "allbox", TBL_OPT_ALLBOX, KEY_ALLBOX},
66: { "frame", TBL_OPT_BOX, KEY_FRAME},
67: { "doubleframe", TBL_OPT_DBOX, KEY_DFRAME},
68: { "tab", 0, KEY_TAB},
69: { "linesize", 0, KEY_LINESIZE},
70: { "nokeep", TBL_OPT_NOKEEP, KEY_NOKEEP},
71: { "decimalpoint", 0, KEY_DPOINT},
72: { "nospaces", TBL_OPT_NOSPACE, KEY_NOSPACE},
73: };
74:
75: static int arg(struct tbl_node *, int,
1.2 schwarze 76: const char *, int *, enum tbl_ident);
1.1 schwarze 77: static void opt(struct tbl_node *, int,
78: const char *, int *);
79:
80: static int
1.2 schwarze 81: arg(struct tbl_node *tbl, int ln, const char *p, int *pos, enum tbl_ident key)
1.1 schwarze 82: {
83: int i;
84: char buf[KEY_MAXNUMSZ];
85:
86: while (isspace((unsigned char)p[*pos]))
87: (*pos)++;
88:
89: /* Arguments always begin with a parenthesis. */
90:
91: if ('(' != p[*pos]) {
1.4 ! schwarze 92: mandoc_msg(MANDOCERR_TBL, tbl->parse,
! 93: ln, *pos, NULL);
1.1 schwarze 94: return(0);
95: }
96:
97: (*pos)++;
98:
99: /*
100: * The arguments can be ANY value, so we can't just stop at the
101: * next close parenthesis (the argument can be a closed
102: * parenthesis itself).
103: */
104:
105: switch (key) {
106: case (KEY_DELIM):
1.2 schwarze 107: if ('\0' == p[(*pos)++]) {
1.4 ! schwarze 108: mandoc_msg(MANDOCERR_TBL, tbl->parse,
! 109: ln, *pos - 1, NULL);
1.1 schwarze 110: return(0);
111: }
112:
1.2 schwarze 113: if ('\0' == p[(*pos)++]) {
1.4 ! schwarze 114: mandoc_msg(MANDOCERR_TBL, tbl->parse,
! 115: ln, *pos - 1, NULL);
1.1 schwarze 116: return(0);
117: }
118: break;
119: case (KEY_TAB):
120: if ('\0' != (tbl->opts.tab = p[(*pos)++]))
121: break;
122:
1.4 ! schwarze 123: mandoc_msg(MANDOCERR_TBL, tbl->parse,
! 124: ln, *pos - 1, NULL);
1.1 schwarze 125: return(0);
126: case (KEY_LINESIZE):
127: for (i = 0; i < KEY_MAXNUMSZ && p[*pos]; i++, (*pos)++) {
128: buf[i] = p[*pos];
129: if ( ! isdigit((unsigned char)buf[i]))
130: break;
131: }
132:
133: if (i < KEY_MAXNUMSZ) {
134: buf[i] = '\0';
135: tbl->opts.linesize = atoi(buf);
136: break;
137: }
138:
1.4 ! schwarze 139: mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, *pos, NULL);
1.1 schwarze 140: return(0);
141: case (KEY_DPOINT):
142: if ('\0' != (tbl->opts.decimal = p[(*pos)++]))
143: break;
144:
1.4 ! schwarze 145: mandoc_msg(MANDOCERR_TBL, tbl->parse,
! 146: ln, *pos - 1, NULL);
1.1 schwarze 147: return(0);
148: default:
149: abort();
150: /* NOTREACHED */
151: }
152:
153: /* End with a close parenthesis. */
154:
155: if (')' == p[(*pos)++])
156: return(1);
157:
1.4 ! schwarze 158: mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, *pos - 1, NULL);
1.1 schwarze 159: return(0);
160: }
161:
162: static void
163: opt(struct tbl_node *tbl, int ln, const char *p, int *pos)
164: {
165: int i, sv;
166: char buf[KEY_MAXNAME];
167:
168: /*
169: * Parse individual options from the stream as surrounded by
170: * this goto. Each pass through the routine parses out a single
171: * option and registers it. Option arguments are processed in
172: * the arg() function.
173: */
174:
175: again: /*
176: * EBNF describing this section:
177: *
178: * options ::= option_list [:space:]* [;][\n]
179: * option_list ::= option option_tail
180: * option_tail ::= [:space:]+ option_list |
181: * ::= epsilon
182: * option ::= [:alpha:]+ args
183: * args ::= [:space:]* [(] [:alpha:]+ [)]
184: */
185:
186: while (isspace((unsigned char)p[*pos]))
187: (*pos)++;
188:
189: /* Safe exit point. */
190:
191: if (';' == p[*pos])
192: return;
193:
194: /* Copy up to first non-alpha character. */
195:
196: for (sv = *pos, i = 0; i < KEY_MAXNAME; i++, (*pos)++) {
1.3 schwarze 197: buf[i] = (char)tolower((unsigned char)p[*pos]);
1.1 schwarze 198: if ( ! isalpha((unsigned char)buf[i]))
199: break;
200: }
201:
202: /* Exit if buffer is empty (or overrun). */
203:
204: if (KEY_MAXNAME == i || 0 == i) {
1.4 ! schwarze 205: mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, *pos, NULL);
1.1 schwarze 206: return;
207: }
208:
209: buf[i] = '\0';
210:
211: while (isspace((unsigned char)p[*pos]))
212: (*pos)++;
213:
214: /*
215: * Look through all of the available keys to find one that
216: * matches the input. FIXME: hashtable this.
217: */
218:
219: for (i = 0; i < KEY_MAXKEYS; i++) {
220: if (strcmp(buf, keys[i].name))
221: continue;
222:
223: /*
224: * Note: this is more difficult to recover from, as we
225: * can be anywhere in the option sequence and it's
226: * harder to jump to the next. Meanwhile, just bail out
227: * of the sequence altogether.
228: */
229:
230: if (keys[i].key)
231: tbl->opts.opts |= keys[i].key;
232: else if ( ! arg(tbl, ln, p, pos, keys[i].ident))
233: return;
234:
235: break;
236: }
237:
238: /*
239: * Allow us to recover from bad options by continuing to another
240: * parse sequence.
241: */
242:
243: if (KEY_MAXKEYS == i)
1.4 ! schwarze 244: mandoc_msg(MANDOCERR_TBLOPT, tbl->parse, ln, sv, NULL);
1.1 schwarze 245:
246: goto again;
247: /* NOTREACHED */
248: }
249:
250: int
251: tbl_option(struct tbl_node *tbl, int ln, const char *p)
252: {
253: int pos;
254:
255: /*
256: * Table options are always on just one line, so automatically
257: * switch into the next input mode here.
258: */
259: tbl->part = TBL_PART_LAYOUT;
260:
261: pos = 0;
262: opt(tbl, ln, p, &pos);
263:
264: /* Always succeed. */
265: return(1);
266: }