out.c

   1 /*      $Id: out.c,v 1.40 2011/04/09 15:29:40 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2011 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 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <time.h>
  30
  31 #include "mandoc.h"
  32 #include "out.h"
  33
  34 static  void    tblcalc_data(struct rofftbl *, struct roffcol *,
  35                         const struct tbl *, const struct tbl_dat *);
  36 static  void    tblcalc_literal(struct rofftbl *, struct roffcol *,
  37                         const struct tbl_dat *);
  38 static  void    tblcalc_number(struct rofftbl *, struct roffcol *,
  39                         const struct tbl *, const struct tbl_dat *);
  40
  41 /*
  42  * Convert a `scaling unit' to a consistent form, or fail.  Scaling
  43  * units are documented in groff.7, mdoc.7, man.7.
  44  */
  45 int
  46 a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
  47 {
  48         char             buf[BUFSIZ], hasd;
  49         int              i;
  50         enum roffscale   unit;
  51
  52         if ('\0' == *src)
  53                 return(0);
  54
  55         i = hasd = 0;
  56
  57         switch (*src) {
  58         case ('+'):
  59                 src++;
  60                 break;
  61         case ('-'):
  62                 buf[i++] = *src++;
  63                 break;
  64         default:
  65                 break;
  66         }
  67
  68         if ('\0' == *src)
  69                 return(0);
  70
  71         while (i < BUFSIZ) {
  72                 if ( ! isdigit((u_char)*src)) {
  73                         if ('.' != *src)
  74                                 break;
  75                         else if (hasd)
  76                                 break;
  77                         else
  78                                 hasd = 1;
  79                 }
  80                 buf[i++] = *src++;
  81         }
  82
  83         if (BUFSIZ == i || (*src && *(src + 1)))
  84                 return(0);
  85
  86         buf[i] = '\0';
  87
  88         switch (*src) {
  89         case ('c'):
  90                 unit = SCALE_CM;
  91                 break;
  92         case ('i'):
  93                 unit = SCALE_IN;
  94                 break;
  95         case ('P'):
  96                 unit = SCALE_PC;
  97                 break;
  98         case ('p'):
  99                 unit = SCALE_PT;
 100                 break;
 101         case ('f'):
 102                 unit = SCALE_FS;
 103                 break;
 104         case ('v'):
 105                 unit = SCALE_VS;
 106                 break;
 107         case ('m'):
 108                 unit = SCALE_EM;
 109                 break;
 110         case ('\0'):
 111                 if (SCALE_MAX == def)
 112                         return(0);
 113                 unit = SCALE_BU;
 114                 break;
 115         case ('u'):
 116                 unit = SCALE_BU;
 117                 break;
 118         case ('M'):
 119                 unit = SCALE_MM;
 120                 break;
 121         case ('n'):
 122                 unit = SCALE_EN;
 123                 break;
 124         default:
 125                 return(0);
 126         }
 127
 128         /* FIXME: do this in the caller. */
 129         if ((dst->scale = atof(buf)) < 0)
 130                 dst->scale = 0;
 131         dst->unit = unit;
 132         return(1);
 133 }
 134
 135
 136 /*
 137  * Correctly writes the time in nroff form, which differs from standard
 138  * form in that a space isn't printed in lieu of the extra %e field for
 139  * single-digit dates.
 140  */
 141 void
 142 time2a(time_t t, char *dst, size_t sz)
 143 {
 144         struct tm        tm;
 145         char             buf[5];
 146         char            *p;
 147         size_t           nsz;
 148
 149         assert(sz > 1);
 150         localtime_r(&t, &tm);
 151
 152         p = dst;
 153         nsz = 0;
 154
 155         dst[0] = '\0';
 156
 157         if (0 == (nsz = strftime(p, sz, "%B ", &tm)))
 158                 return;
 159
 160         p += (int)nsz;
 161         sz -= nsz;
 162
 163         if (0 == strftime(buf, sizeof(buf), "%e, ", &tm))
 164                 return;
 165
 166         nsz = strlcat(p, buf + (' ' == buf[0] ? 1 : 0), sz);
 167
 168         if (nsz >= sz)
 169                 return;
 170
 171         p += (int)nsz;
 172         sz -= nsz;
 173
 174         (void)strftime(p, sz, "%Y", &tm);
 175 }
 176
 177 /*
 178  * Calculate the abstract widths and decimal positions of columns in a
 179  * table.  This routine allocates the columns structures then runs over
 180  * all rows and cells in the table.  The function pointers in "tbl" are
 181  * used for the actual width calculations.
 182  */
 183 void
 184 tblcalc(struct rofftbl *tbl, const struct tbl_span *sp)
 185 {
 186         const struct tbl_dat    *dp;
 187         const struct tbl_head   *hp;
 188         struct roffcol          *col;
 189
 190         /*
 191          * Allocate the master column specifiers.  These will hold the
 192          * widths and decimal positions for all cells in the column.  It
 193          * must be freed and nullified by the caller.
 194          */
 195
 196         assert(NULL == tbl->cols);
 197         tbl->cols = mandoc_calloc
 198                 ((size_t)sp->tbl->cols, sizeof(struct roffcol));
 199
 200         hp = sp->head;
 201
 202         for ( ; sp; sp = sp->next) {
 203                 if (TBL_SPAN_DATA != sp->pos)
 204                         continue;
 205                 /*
 206                  * Account for the data cells in the layout, matching it
 207                  * to data cells in the data section.
 208                  */
 209                 for (dp = sp->first; dp; dp = dp->next) {
 210                         assert(dp->layout);
 211                         col = &tbl->cols[dp->layout->head->ident];
 212                         tblcalc_data(tbl, col, sp->tbl, dp);
 213                 }
 214         }
 215
 216         /*
 217          * Calculate width of the spanners.  These get one space for a
 218          * vertical line, two for a double-vertical line.
 219          */
 220
 221         for ( ; hp; hp = hp->next) {
 222                 col = &tbl->cols[hp->ident];
 223                 switch (hp->pos) {
 224                 case (TBL_HEAD_VERT):
 225                         col->width = (*tbl->len)(1, tbl->arg);
 226                         break;
 227                 case (TBL_HEAD_DVERT):
 228                         col->width = (*tbl->len)(2, tbl->arg);
 229                         break;
 230                 default:
 231                         break;
 232                 }
 233         }
 234 }
 235
 236 static void
 237 tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
 238                 const struct tbl *tp, const struct tbl_dat *dp)
 239 {
 240         size_t           sz;
 241
 242         /* Branch down into data sub-types. */
 243
 244         switch (dp->layout->pos) {
 245         case (TBL_CELL_HORIZ):
 246                 /* FALLTHROUGH */
 247         case (TBL_CELL_DHORIZ):
 248                 sz = (*tbl->len)(1, tbl->arg);
 249                 if (col->width < sz)
 250                         col->width = sz;
 251                 break;
 252         case (TBL_CELL_LONG):
 253                 /* FALLTHROUGH */
 254         case (TBL_CELL_CENTRE):
 255                 /* FALLTHROUGH */
 256         case (TBL_CELL_LEFT):
 257                 /* FALLTHROUGH */
 258         case (TBL_CELL_RIGHT):
 259                 tblcalc_literal(tbl, col, dp);
 260                 break;
 261         case (TBL_CELL_NUMBER):
 262                 tblcalc_number(tbl, col, tp, dp);
 263                 break;
 264         case (TBL_CELL_DOWN):
 265                 break;
 266         default:
 267                 abort();
 268                 /* NOTREACHED */
 269         }
 270 }
 271
 272 static void
 273 tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
 274                 const struct tbl_dat *dp)
 275 {
 276         size_t           sz, bufsz, spsz;
 277         const char      *str;
 278
 279         /*
 280          * Calculate our width and use the spacing, with a minimum
 281          * spacing dictated by position (centre, e.g,. gets a space on
 282          * either side, while right/left get a single adjacent space).
 283          */
 284
 285         bufsz = spsz = 0;
 286         str = dp->string ? dp->string : "";
 287         sz = (*tbl->slen)(str, tbl->arg);
 288
 289         /* FIXME: TBL_DATA_HORIZ et al.? */
 290
 291         assert(dp->layout);
 292         switch (dp->layout->pos) {
 293         case (TBL_CELL_LONG):
 294                 /* FALLTHROUGH */
 295         case (TBL_CELL_CENTRE):
 296                 bufsz = (*tbl->len)(1, tbl->arg);
 297                 break;
 298         default:
 299                 bufsz = (*tbl->len)(1, tbl->arg);
 300                 break;
 301         }
 302
 303         if (dp->layout->spacing) {
 304                 spsz = (*tbl->len)(dp->layout->spacing, tbl->arg);
 305                 bufsz = bufsz > spsz ? bufsz : spsz;
 306         }
 307
 308         sz += bufsz;
 309         if (col->width < sz)
 310                 col->width = sz;
 311 }
 312
 313 static void
 314 tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
 315                 const struct tbl *tp, const struct tbl_dat *dp)
 316 {
 317         int              i;
 318         size_t           sz, psz, ssz, d;
 319         const char      *str;
 320         char            *cp;
 321         char             buf[2];
 322
 323         /*
 324          * First calculate number width and decimal place (last + 1 for
 325          * no-decimal numbers).  If the stored decimal is subsequent
 326          * ours, make our size longer by that difference
 327          * (right-"shifting"); similarly, if ours is subsequent the
 328          * stored, then extend the stored size by the difference.
 329          * Finally, re-assign the stored values.
 330          */
 331
 332         str = dp->string ? dp->string : "";
 333         sz = (*tbl->slen)(str, tbl->arg);
 334
 335         /* FIXME: TBL_DATA_HORIZ et al.? */
 336
 337         buf[0] = tp->decimal;
 338         buf[1] = '\0';
 339
 340         psz = (*tbl->slen)(buf, tbl->arg);
 341
 342         if (NULL != (cp = strrchr(str, tp->decimal))) {
 343                 buf[1] = '\0';
 344                 for (ssz = 0, i = 0; cp != &str[i]; i++) {
 345                         buf[0] = str[i];
 346                         ssz += (*tbl->slen)(buf, tbl->arg);
 347                 }
 348                 d = ssz + psz;
 349         } else
 350                 d = sz + psz;
 351
 352         /* Padding. */
 353
 354         sz += (*tbl->len)(2, tbl->arg);
 355         d += (*tbl->len)(1, tbl->arg);
 356
 357         /* Adjust the settings for this column. */
 358
 359         if (col->decimal > d) {
 360                 sz += col->decimal - d;
 361                 d = col->decimal;
 362         } else
 363                 col->width += d - col->decimal;
 364
 365         if (sz > col->width)
 366                 col->width = sz;
 367         if (d > col->decimal)
 368                 col->decimal = d;
 369
 370         /* Adjust for stipulated width. */
 371
 372         if (col->width < dp->layout->spacing)
 373                 col->width = dp->layout->spacing;
 374 }
 375
 376