| 1 | /* $Id: out.c,v 1.11 2009/11/12 08:21:05 kristaps Exp $ */ |
| 2 | /* |
| 3 | * Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se> |
| 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 <sys/types.h> |
| 18 | |
| 19 | #include <assert.h> |
| 20 | #include <ctype.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <time.h> |
| 25 | |
| 26 | #include "out.h" |
| 27 | |
| 28 | /* See a2roffdeco(). */ |
| 29 | #define C2LIM(c, l) do { \ |
| 30 | (l) = 1; \ |
| 31 | if ('[' == (c) || '\'' == (c)) \ |
| 32 | (l) = 0; \ |
| 33 | else if ('(' == (c)) \ |
| 34 | (l) = 2; } \ |
| 35 | while (/* CONSTCOND */ 0) |
| 36 | |
| 37 | /* See a2roffdeco(). */ |
| 38 | #define C2TERM(c, t) do { \ |
| 39 | (t) = 0; \ |
| 40 | if ('\'' == (c)) \ |
| 41 | (t) = 1; \ |
| 42 | else if ('[' == (c)) \ |
| 43 | (t) = 2; \ |
| 44 | else if ('(' == (c)) \ |
| 45 | (t) = 3; } \ |
| 46 | while (/* CONSTCOND */ 0) |
| 47 | |
| 48 | #ifdef __linux__ |
| 49 | extern size_t strlcat(char *, const char *, size_t); |
| 50 | #endif |
| 51 | |
| 52 | /* |
| 53 | * Convert a `scaling unit' to a consistent form, or fail. Scaling |
| 54 | * units are documented in groff.7, mdoc.7, man.7. |
| 55 | */ |
| 56 | int |
| 57 | a2roffsu(const char *src, struct roffsu *dst, enum roffscale def) |
| 58 | { |
| 59 | char buf[BUFSIZ], hasd; |
| 60 | int i; |
| 61 | enum roffscale unit; |
| 62 | |
| 63 | if ('\0' == *src) |
| 64 | return(0); |
| 65 | |
| 66 | i = hasd = 0; |
| 67 | |
| 68 | switch (*src) { |
| 69 | case ('+'): |
| 70 | src++; |
| 71 | break; |
| 72 | case ('-'): |
| 73 | buf[i++] = *src++; |
| 74 | break; |
| 75 | default: |
| 76 | break; |
| 77 | } |
| 78 | |
| 79 | if ('\0' == *src) |
| 80 | return(0); |
| 81 | |
| 82 | while (i < BUFSIZ) { |
| 83 | if ( ! isdigit((u_char)*src)) { |
| 84 | if ('.' != *src) |
| 85 | break; |
| 86 | else if (hasd) |
| 87 | break; |
| 88 | else |
| 89 | hasd = 1; |
| 90 | } |
| 91 | buf[i++] = *src++; |
| 92 | } |
| 93 | |
| 94 | if (BUFSIZ == i || (*src && *(src + 1))) |
| 95 | return(0); |
| 96 | |
| 97 | buf[i] = '\0'; |
| 98 | |
| 99 | switch (*src) { |
| 100 | case ('c'): |
| 101 | unit = SCALE_CM; |
| 102 | break; |
| 103 | case ('i'): |
| 104 | unit = SCALE_IN; |
| 105 | break; |
| 106 | case ('P'): |
| 107 | unit = SCALE_PC; |
| 108 | break; |
| 109 | case ('p'): |
| 110 | unit = SCALE_PT; |
| 111 | break; |
| 112 | case ('f'): |
| 113 | unit = SCALE_FS; |
| 114 | break; |
| 115 | case ('v'): |
| 116 | unit = SCALE_VS; |
| 117 | break; |
| 118 | case ('m'): |
| 119 | unit = SCALE_EM; |
| 120 | break; |
| 121 | case ('\0'): |
| 122 | if (SCALE_MAX == def) |
| 123 | return(0); |
| 124 | unit = SCALE_BU; |
| 125 | break; |
| 126 | case ('u'): |
| 127 | unit = SCALE_BU; |
| 128 | break; |
| 129 | case ('M'): |
| 130 | unit = SCALE_MM; |
| 131 | break; |
| 132 | case ('n'): |
| 133 | unit = SCALE_EN; |
| 134 | break; |
| 135 | default: |
| 136 | return(0); |
| 137 | } |
| 138 | |
| 139 | if ((dst->scale = atof(buf)) < 0) |
| 140 | dst->scale = 0; |
| 141 | dst->unit = unit; |
| 142 | dst->pt = hasd; |
| 143 | |
| 144 | return(1); |
| 145 | } |
| 146 | |
| 147 | |
| 148 | /* |
| 149 | * Correctly writes the time in nroff form, which differs from standard |
| 150 | * form in that a space isn't printed in lieu of the extra %e field for |
| 151 | * single-digit dates. |
| 152 | */ |
| 153 | void |
| 154 | time2a(time_t t, char *dst, size_t sz) |
| 155 | { |
| 156 | struct tm tm; |
| 157 | char buf[5]; |
| 158 | char *p; |
| 159 | size_t nsz; |
| 160 | |
| 161 | assert(sz > 1); |
| 162 | localtime_r(&t, &tm); |
| 163 | |
| 164 | p = dst; |
| 165 | nsz = 0; |
| 166 | |
| 167 | dst[0] = '\0'; |
| 168 | |
| 169 | if (0 == (nsz = strftime(p, sz, "%B ", &tm))) |
| 170 | return; |
| 171 | |
| 172 | p += (int)nsz; |
| 173 | sz -= nsz; |
| 174 | |
| 175 | if (0 == strftime(buf, sizeof(buf), "%e, ", &tm)) |
| 176 | return; |
| 177 | |
| 178 | nsz = strlcat(p, buf + (' ' == buf[0] ? 1 : 0), sz); |
| 179 | |
| 180 | if (nsz >= sz) |
| 181 | return; |
| 182 | |
| 183 | p += (int)nsz; |
| 184 | sz -= nsz; |
| 185 | |
| 186 | (void)strftime(p, sz, "%Y", &tm); |
| 187 | } |
| 188 | |
| 189 | |
| 190 | /* |
| 191 | * Returns length of parsed string (the leading "\" should NOT be |
| 192 | * included). This can be zero if the current character is the nil |
| 193 | * terminator. "d" is set to the type of parsed decorator, which may |
| 194 | * have an adjoining "word" of size "sz" (e.g., "(ab" -> "ab", 2). |
| 195 | */ |
| 196 | int |
| 197 | a2roffdeco(enum roffdeco *d, |
| 198 | const char **word, size_t *sz) |
| 199 | { |
| 200 | int j, type, term, lim; |
| 201 | const char *wp, *sp; |
| 202 | |
| 203 | *d = DECO_NONE; |
| 204 | wp = *word; |
| 205 | type = 1; |
| 206 | |
| 207 | switch (*wp) { |
| 208 | case ('\0'): |
| 209 | return(0); |
| 210 | |
| 211 | case ('('): |
| 212 | if ('\0' == *(++wp)) |
| 213 | return(1); |
| 214 | if ('\0' == *(wp + 1)) |
| 215 | return(2); |
| 216 | |
| 217 | *d = DECO_SPECIAL; |
| 218 | *sz = 2; |
| 219 | *word = wp; |
| 220 | return(3); |
| 221 | |
| 222 | case ('*'): |
| 223 | switch (*(++wp)) { |
| 224 | case ('\0'): |
| 225 | return(1); |
| 226 | |
| 227 | case ('('): |
| 228 | if ('\0' == *(++wp)) |
| 229 | return(2); |
| 230 | if ('\0' == *(wp + 1)) |
| 231 | return(3); |
| 232 | |
| 233 | *d = DECO_RESERVED; |
| 234 | *sz = 2; |
| 235 | *word = wp; |
| 236 | return(4); |
| 237 | |
| 238 | case ('['): |
| 239 | type = 0; |
| 240 | break; |
| 241 | |
| 242 | default: |
| 243 | *d = DECO_RESERVED; |
| 244 | *sz = 1; |
| 245 | *word = wp; |
| 246 | return(2); |
| 247 | } |
| 248 | break; |
| 249 | |
| 250 | case ('s'): |
| 251 | sp = wp; |
| 252 | if ('\0' == *(++wp)) |
| 253 | return(1); |
| 254 | |
| 255 | C2LIM(*wp, lim); |
| 256 | C2TERM(*wp, term); |
| 257 | |
| 258 | if (term) |
| 259 | wp++; |
| 260 | |
| 261 | *word = wp; |
| 262 | |
| 263 | if (*wp == '+' || *wp == '-') |
| 264 | ++wp; |
| 265 | |
| 266 | switch (*wp) { |
| 267 | case ('\''): |
| 268 | /* FALLTHROUGH */ |
| 269 | case ('['): |
| 270 | /* FALLTHROUGH */ |
| 271 | case ('('): |
| 272 | if (term) |
| 273 | return((int)(wp - sp)); |
| 274 | |
| 275 | C2LIM(*wp, lim); |
| 276 | C2TERM(*wp, term); |
| 277 | wp++; |
| 278 | break; |
| 279 | default: |
| 280 | break; |
| 281 | } |
| 282 | |
| 283 | if ( ! isdigit((u_char)*wp)) |
| 284 | return((int)(wp - sp)); |
| 285 | |
| 286 | for (j = 0; isdigit((u_char)*wp); j++) { |
| 287 | if (lim && j >= lim) |
| 288 | break; |
| 289 | ++wp; |
| 290 | } |
| 291 | |
| 292 | if (term && term < 3) { |
| 293 | if (1 == term && *wp != '\'') |
| 294 | return((int)(wp - sp)); |
| 295 | if (2 == term && *wp != ']') |
| 296 | return((int)(wp - sp)); |
| 297 | ++wp; |
| 298 | } |
| 299 | |
| 300 | *d = DECO_SIZE; |
| 301 | return((int)(wp - sp)); |
| 302 | |
| 303 | case ('f'): |
| 304 | switch (*(++wp)) { |
| 305 | case ('\0'): |
| 306 | return(1); |
| 307 | case ('3'): |
| 308 | /* FALLTHROUGH */ |
| 309 | case ('B'): |
| 310 | *d = DECO_BOLD; |
| 311 | break; |
| 312 | case ('2'): |
| 313 | /* FALLTHROUGH */ |
| 314 | case ('I'): |
| 315 | *d = DECO_ITALIC; |
| 316 | break; |
| 317 | case ('P'): |
| 318 | *d = DECO_PREVIOUS; |
| 319 | break; |
| 320 | case ('1'): |
| 321 | /* FALLTHROUGH */ |
| 322 | case ('R'): |
| 323 | *d = DECO_ROMAN; |
| 324 | break; |
| 325 | default: |
| 326 | break; |
| 327 | } |
| 328 | |
| 329 | return(2); |
| 330 | |
| 331 | case ('['): |
| 332 | break; |
| 333 | |
| 334 | case ('c'): |
| 335 | *d = DECO_NOSPACE; |
| 336 | *sz = 1; |
| 337 | return(1); |
| 338 | |
| 339 | default: |
| 340 | *d = DECO_SPECIAL; |
| 341 | *word = wp; |
| 342 | *sz = 1; |
| 343 | return(1); |
| 344 | } |
| 345 | |
| 346 | *word = ++wp; |
| 347 | for (j = 0; *wp && ']' != *wp; wp++, j++) |
| 348 | /* Loop... */ ; |
| 349 | |
| 350 | if ('\0' == *wp) |
| 351 | return(j + 1); |
| 352 | |
| 353 | *d = type ? DECO_SPECIAL : DECO_RESERVED; |
| 354 | *sz = (size_t)j; |
| 355 | return (j + 2); |
| 356 | } |