7136a6c7 |
1 | /* |
2 | * man page backend for Halibut |
3 | */ |
4 | |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
7 | #include <assert.h> |
8 | #include "halibut.h" |
9 | |
10 | static void man_text(FILE *, word *, int newline, int quote_props); |
11 | static void man_codepara(FILE *, word *); |
4b3c5afb |
12 | static int man_convert(wchar_t *s, int maxlen, |
13 | char **result, int quote_props); |
14 | |
15 | typedef struct { |
16 | wchar_t *th; |
17 | int headnumbers; |
18 | int mindepth; |
50d6b4bd |
19 | char *filename; |
4b3c5afb |
20 | } manconfig; |
21 | |
22 | static manconfig man_configure(paragraph *source) { |
23 | manconfig ret; |
24 | |
25 | /* |
26 | * Defaults. |
27 | */ |
28 | ret.th = NULL; |
29 | ret.headnumbers = FALSE; |
30 | ret.mindepth = 0; |
50d6b4bd |
31 | ret.filename = dupstr("output.1"); |
4b3c5afb |
32 | |
33 | for (; source; source = source->next) { |
34 | if (source->type == para_Config) { |
35 | if (!ustricmp(source->keyword, L"man-identity")) { |
36 | wchar_t *wp, *ep; |
37 | |
38 | wp = uadv(source->keyword); |
39 | ep = wp; |
40 | while (*ep) |
41 | ep = uadv(ep); |
50d6b4bd |
42 | sfree(ret.th); |
4b3c5afb |
43 | ret.th = mknewa(wchar_t, ep - wp + 1); |
44 | memcpy(ret.th, wp, (ep - wp + 1) * sizeof(wchar_t)); |
45 | } else if (!ustricmp(source->keyword, L"man-headnumbers")) { |
46 | ret.headnumbers = utob(uadv(source->keyword)); |
47 | } else if (!ustricmp(source->keyword, L"man-mindepth")) { |
48 | ret.mindepth = utoi(uadv(source->keyword)); |
50d6b4bd |
49 | } else if (!ustricmp(source->keyword, L"man-filename")) { |
50 | sfree(ret.filename); |
51 | ret.filename = utoa_dup(uadv(source->keyword)); |
4b3c5afb |
52 | } |
53 | } |
54 | } |
55 | |
56 | return ret; |
57 | } |
58 | |
59 | static void man_conf_cleanup(manconfig cf) |
60 | { |
61 | sfree(cf.th); |
50d6b4bd |
62 | sfree(cf.filename); |
4b3c5afb |
63 | } |
7136a6c7 |
64 | |
ba9c1487 |
65 | paragraph *man_config_filename(char *filename) |
66 | { |
67 | paragraph *p; |
68 | wchar_t *ufilename, *up; |
69 | int len; |
70 | |
71 | p = mknew(paragraph); |
72 | memset(p, 0, sizeof(*p)); |
73 | p->type = para_Config; |
74 | p->next = NULL; |
75 | p->fpos.filename = "<command line>"; |
76 | p->fpos.line = p->fpos.col = -1; |
77 | |
78 | ufilename = ufroma_dup(filename); |
79 | len = ustrlen(ufilename) + 2 + lenof(L"man-filename"); |
80 | p->keyword = mknewa(wchar_t, len); |
81 | up = p->keyword; |
82 | ustrcpy(up, L"man-filename"); |
83 | up = uadv(up); |
84 | ustrcpy(up, ufilename); |
85 | up = uadv(up); |
86 | *up = L'\0'; |
87 | assert(up - p->keyword < len); |
88 | sfree(ufilename); |
89 | |
90 | return p; |
91 | } |
92 | |
7136a6c7 |
93 | #define QUOTE_INITCTRL 1 /* quote initial . and ' on a line */ |
94 | #define QUOTE_QUOTES 2 /* quote double quotes by doubling them */ |
95 | |
96 | void man_backend(paragraph *sourceform, keywordlist *keywords, |
43341922 |
97 | indexdata *idx, void *unused) { |
7136a6c7 |
98 | paragraph *p; |
99 | FILE *fp; |
4b3c5afb |
100 | manconfig conf; |
7136a6c7 |
101 | |
43341922 |
102 | IGNORE(unused); |
103 | IGNORE(keywords); |
104 | IGNORE(idx); |
7136a6c7 |
105 | |
4b3c5afb |
106 | conf = man_configure(sourceform); |
107 | |
7136a6c7 |
108 | /* |
50d6b4bd |
109 | * Open the output file. |
7136a6c7 |
110 | */ |
50d6b4bd |
111 | fp = fopen(conf.filename, "w"); |
7136a6c7 |
112 | if (!fp) { |
50d6b4bd |
113 | error(err_cantopenw, conf.filename); |
7136a6c7 |
114 | return; |
115 | } |
116 | |
117 | /* Do the version ID */ |
118 | for (p = sourceform; p; p = p->next) |
119 | if (p->type == para_VersionID) { |
120 | fprintf(fp, ".\\\" "); |
121 | man_text(fp, p->words, TRUE, 0); |
122 | } |
123 | |
4b3c5afb |
124 | /* .TH name-of-program manual-section */ |
22905f72 |
125 | fprintf(fp, ".TH"); |
126 | if (conf.th && *conf.th) { |
4b3c5afb |
127 | char *c; |
22905f72 |
128 | wchar_t *wp; |
129 | |
130 | for (wp = conf.th; *wp; wp = uadv(wp)) { |
131 | fputs(" \"", fp); |
132 | man_convert(wp, 0, &c, QUOTE_QUOTES); |
133 | fputs(c, fp); |
134 | sfree(c); |
135 | fputc('"', fp); |
4b3c5afb |
136 | } |
137 | } |
22905f72 |
138 | fputc('\n', fp); |
7136a6c7 |
139 | |
140 | fprintf(fp, ".UC\n"); |
141 | |
7136a6c7 |
142 | for (p = sourceform; p; p = p->next) switch (p->type) { |
143 | /* |
144 | * Things we ignore because we've already processed them or |
145 | * aren't going to touch them in this pass. |
146 | */ |
147 | case para_IM: |
148 | case para_BR: |
149 | case para_Biblio: /* only touch BiblioCited */ |
150 | case para_VersionID: |
7136a6c7 |
151 | case para_NoCite: |
152 | case para_Title: |
153 | break; |
154 | |
155 | /* |
156 | * Headings. |
157 | */ |
158 | case para_Chapter: |
159 | case para_Appendix: |
160 | case para_UnnumberedChapter: |
161 | case para_Heading: |
162 | case para_Subsect: |
8902e0ed |
163 | |
4b3c5afb |
164 | { |
165 | int depth; |
166 | if (p->type == para_Subsect) |
167 | depth = p->aux + 2; |
168 | else if (p->type == para_Heading) |
169 | depth = 1; |
170 | else |
171 | depth = 0; |
172 | if (depth >= conf.mindepth) { |
173 | fprintf(fp, ".SH \""); |
174 | if (conf.headnumbers && p->kwtext) { |
175 | man_text(fp, p->kwtext, FALSE, QUOTE_QUOTES); |
176 | fprintf(fp, " "); |
177 | } |
178 | man_text(fp, p->words, FALSE, QUOTE_QUOTES); |
179 | fprintf(fp, "\"\n"); |
180 | } |
181 | break; |
182 | } |
7136a6c7 |
183 | |
184 | /* |
185 | * Code paragraphs. |
186 | */ |
187 | case para_Code: |
188 | fprintf(fp, ".PP\n"); |
189 | man_codepara(fp, p->words); |
190 | break; |
191 | |
192 | /* |
193 | * Normal paragraphs. |
194 | */ |
195 | case para_Normal: |
9057a0a8 |
196 | case para_Copyright: |
7136a6c7 |
197 | fprintf(fp, ".PP\n"); |
198 | man_text(fp, p->words, TRUE, 0); |
199 | break; |
200 | |
201 | /* |
202 | * List paragraphs. |
203 | */ |
204 | case para_Description: |
205 | case para_BiblioCited: |
206 | case para_Bullet: |
207 | case para_NumberedList: |
208 | if (p->type == para_Bullet) { |
209 | fprintf(fp, ".IP \"\\fBo\\fP\"\n"); /* FIXME: configurable? */ |
210 | } else if (p->type == para_NumberedList) { |
211 | fprintf(fp, ".IP \""); |
212 | man_text(fp, p->kwtext, FALSE, QUOTE_QUOTES); |
213 | fprintf(fp, "\"\n"); |
214 | } else if (p->type == para_Description) { |
215 | /* |
216 | * Do nothing; the .xP for this paragraph is the .IP |
217 | * which has come before it in the DescribedThing. |
218 | */ |
219 | } else if (p->type == para_BiblioCited) { |
220 | fprintf(fp, ".IP \""); |
221 | man_text(fp, p->kwtext, FALSE, QUOTE_QUOTES); |
222 | fprintf(fp, "\"\n"); |
223 | } |
224 | man_text(fp, p->words, TRUE, 0); |
225 | break; |
226 | |
227 | case para_DescribedThing: |
228 | fprintf(fp, ".IP \""); |
229 | man_text(fp, p->words, FALSE, QUOTE_QUOTES); |
230 | fprintf(fp, "\"\n"); |
231 | break; |
232 | |
233 | case para_Rule: |
234 | /* |
4b3c5afb |
235 | * This isn't terribly good. Anyone who wants to do better |
236 | * should feel free! |
7136a6c7 |
237 | */ |
4b3c5afb |
238 | fprintf(fp, ".PP\n----------------------------------------\n"); |
7136a6c7 |
239 | break; |
240 | |
241 | case para_LcontPush: |
2614b01d |
242 | case para_QuotePush: |
7136a6c7 |
243 | fprintf(fp, ".RS\n"); |
244 | break; |
245 | case para_LcontPop: |
2614b01d |
246 | case para_QuotePop: |
7136a6c7 |
247 | fprintf(fp, ".RE\n"); |
248 | break; |
249 | } |
250 | |
251 | /* |
252 | * Tidy up. |
253 | */ |
254 | fclose(fp); |
4b3c5afb |
255 | man_conf_cleanup(conf); |
7136a6c7 |
256 | } |
257 | |
258 | /* |
259 | * Convert a wide string into a string of chars. If `result' is |
260 | * non-NULL, mallocs the resulting string and stores a pointer to |
261 | * it in `*result'. If `result' is NULL, merely checks whether all |
262 | * characters in the string are feasible for the output character |
263 | * set. |
264 | * |
265 | * Return is nonzero if all characters are OK. If not all |
266 | * characters are OK but `result' is non-NULL, a result _will_ |
267 | * still be generated! |
268 | * |
269 | * FIXME: Here is probably also a good place to do escaping sorts |
270 | * of things. I know I at least need to escape backslash, and full |
271 | * stops at the starts of words are probably trouble as well. |
272 | */ |
4b3c5afb |
273 | static int man_convert(wchar_t *s, int maxlen, |
274 | char **result, int quote_props) { |
7136a6c7 |
275 | /* |
276 | * FIXME. Currently this is ISO8859-1 only. |
277 | */ |
278 | int doing = (result != 0); |
279 | int ok = TRUE; |
280 | char *p = NULL; |
281 | int plen = 0, psize = 0; |
282 | |
4b3c5afb |
283 | if (maxlen <= 0) |
284 | maxlen = -1; |
285 | |
286 | for (; *s && maxlen != 0; s++, maxlen--) { |
7136a6c7 |
287 | wchar_t c = *s; |
288 | char outc; |
289 | |
290 | if ((c >= 32 && c <= 126) || |
291 | (c >= 160 && c <= 255)) { |
292 | /* Char is OK. */ |
293 | outc = (char)c; |
294 | } else { |
295 | /* Char is not OK. */ |
296 | ok = FALSE; |
297 | outc = 0xBF; /* approximate the good old DEC `uh?' */ |
298 | } |
299 | if (doing) { |
300 | if (plen+3 >= psize) { |
301 | psize = plen + 256; |
302 | p = resize(p, psize); |
303 | } |
304 | if (plen == 0 && (outc == '.' || outc == '\'') && |
305 | (quote_props & QUOTE_INITCTRL)) { |
306 | /* |
307 | * Control character (. or ') at the start of a |
308 | * line. Quote it by putting \& (troff zero-width |
309 | * space) before it. |
310 | */ |
311 | p[plen++] = '\\'; |
312 | p[plen++] = '&'; |
313 | } else if (outc == '\\') { |
314 | /* |
315 | * Quote backslashes by doubling them, always. |
316 | */ |
317 | p[plen++] = '\\'; |
318 | } else if (outc == '"' && (quote_props & QUOTE_QUOTES)) { |
319 | /* |
320 | * Double quote within double quotes. Quote it by |
321 | * doubling. |
322 | */ |
323 | p[plen++] = '"'; |
324 | } |
325 | p[plen++] = outc; |
326 | } |
327 | } |
328 | if (doing) { |
329 | p = resize(p, plen+1); |
330 | p[plen] = '\0'; |
331 | *result = p; |
332 | } |
333 | return ok; |
334 | } |
335 | |
336 | static void man_rdaddwc(rdstringc *rs, word *text, word *end, |
337 | int quote_props) { |
338 | char *c; |
339 | |
340 | for (; text && text != end; text = text->next) switch (text->type) { |
341 | case word_HyperLink: |
342 | case word_HyperEnd: |
343 | case word_UpperXref: |
344 | case word_LowerXref: |
345 | case word_XrefEnd: |
346 | case word_IndexRef: |
347 | break; |
348 | |
349 | case word_Normal: |
350 | case word_Emph: |
351 | case word_Code: |
352 | case word_WeakCode: |
353 | case word_WhiteSpace: |
354 | case word_EmphSpace: |
355 | case word_CodeSpace: |
356 | case word_WkCodeSpace: |
357 | case word_Quote: |
358 | case word_EmphQuote: |
359 | case word_CodeQuote: |
360 | case word_WkCodeQuote: |
361 | assert(text->type != word_CodeQuote && |
362 | text->type != word_WkCodeQuote); |
363 | if (towordstyle(text->type) == word_Emph && |
364 | (attraux(text->aux) == attr_First || |
365 | attraux(text->aux) == attr_Only)) |
366 | rdaddsc(rs, "\\fI"); |
4b3c5afb |
367 | else if ((towordstyle(text->type) == word_Code || |
368 | towordstyle(text->type) == word_WeakCode) && |
7136a6c7 |
369 | (attraux(text->aux) == attr_First || |
370 | attraux(text->aux) == attr_Only)) |
371 | rdaddsc(rs, "\\fB"); |
372 | if (removeattr(text->type) == word_Normal) { |
373 | if (rs->pos > 0) |
374 | quote_props &= ~QUOTE_INITCTRL; /* not at start any more */ |
4b3c5afb |
375 | if (man_convert(text->text, 0, &c, quote_props)) |
7136a6c7 |
376 | rdaddsc(rs, c); |
377 | else |
378 | man_rdaddwc(rs, text->alt, NULL, quote_props); |
379 | sfree(c); |
380 | } else if (removeattr(text->type) == word_WhiteSpace) { |
381 | rdaddc(rs, ' '); |
382 | } else if (removeattr(text->type) == word_Quote) { |
4b3c5afb |
383 | rdaddc(rs, '"'); |
384 | if (quote_props & QUOTE_QUOTES) |
385 | rdaddc(rs, '"'); |
7136a6c7 |
386 | } |
387 | if (towordstyle(text->type) == word_Emph && |
388 | (attraux(text->aux) == attr_Last || |
389 | attraux(text->aux) == attr_Only)) |
390 | rdaddsc(rs, "\\fP"); |
4b3c5afb |
391 | else if ((towordstyle(text->type) == word_Code || |
392 | towordstyle(text->type) == word_WeakCode) && |
7136a6c7 |
393 | (attraux(text->aux) == attr_Last || |
394 | attraux(text->aux) == attr_Only)) |
395 | rdaddsc(rs, "\\fP"); |
396 | break; |
397 | } |
398 | } |
399 | |
400 | static void man_text(FILE *fp, word *text, int newline, int quote_props) { |
401 | rdstringc t = { 0, 0, NULL }; |
402 | |
403 | man_rdaddwc(&t, text, NULL, quote_props | QUOTE_INITCTRL); |
404 | fprintf(fp, "%s", t.text); |
405 | sfree(t.text); |
406 | if (newline) |
407 | fputc('\n', fp); |
408 | } |
409 | |
410 | static void man_codepara(FILE *fp, word *text) { |
411 | fprintf(fp, ".nf\n"); |
412 | for (; text; text = text->next) if (text->type == word_WeakCode) { |
413 | char *c; |
4b3c5afb |
414 | wchar_t *t, *e; |
415 | int quote_props = QUOTE_INITCTRL; |
416 | |
417 | t = text->text; |
418 | if (text->next && text->next->type == word_Emph) { |
419 | e = text->next->text; |
420 | text = text->next; |
421 | } else |
422 | e = NULL; |
423 | |
424 | while (e && *e && *t) { |
425 | int n; |
426 | int ec = *e; |
427 | |
428 | for (n = 0; t[n] && e[n] && e[n] == ec; n++); |
429 | if (ec == 'i') |
430 | fprintf(fp, "\\fI"); |
431 | else if (ec == 'b') |
432 | fprintf(fp, "\\fB"); |
433 | man_convert(t, n, &c, quote_props); |
434 | quote_props &= ~QUOTE_INITCTRL; |
435 | fprintf(fp, "%s", c); |
436 | sfree(c); |
437 | if (ec == 'i' || ec == 'b') |
438 | fprintf(fp, "\\fP"); |
439 | t += n; |
440 | e += n; |
441 | } |
442 | man_convert(t, 0, &c, quote_props); |
7136a6c7 |
443 | fprintf(fp, "%s\n", c); |
444 | sfree(c); |
445 | } |
446 | fprintf(fp, ".fi\n"); |
447 | } |