locale/programs/ld-paper.c

   1 /* Copyright (C) 1998-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published
   6    by the Free Software Foundation; version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #ifdef HAVE_CONFIG_H
  18 # include <config.h>
  19 #endif
  20
  21 #include <langinfo.h>
  22 #include <string.h>
  23 #include <stdint.h>
  24 #include <sys/uio.h>
  25
  26 #include <assert.h>
  27
  28 #include "localedef.h"
  29 #include "localeinfo.h"
  30 #include "locfile.h"
  31
  32
  33 /* The real definition of the struct for the LC_PAPER locale.  */
  34 struct locale_paper_t
  35 {
  36   uint32_t height;
  37   uint32_t width;
  38 };
  39
  40
  41 static void
  42 paper_startup (struct linereader *lr, struct localedef_t *locale,
  43                int ignore_content)
  44 {
  45   if (!ignore_content)
  46     locale->categories[LC_PAPER].paper =
  47       (struct locale_paper_t *) xcalloc (1, sizeof (struct locale_paper_t));
  48
  49   if (lr != NULL)
  50     {
  51       lr->translate_strings = 1;
  52       lr->return_widestr = 0;
  53     }
  54 }
  55
  56
  57 void
  58 paper_finish (struct localedef_t *locale, const struct charmap_t *charmap)
  59 {
  60   struct locale_paper_t *paper = locale->categories[LC_PAPER].paper;
  61   int nothing = 0;
  62
  63   /* Now resolve copying and also handle completely missing definitions.  */
  64   if (paper == NULL)
  65     {
  66       /* First see whether we were supposed to copy.  If yes, find the
  67          actual definition.  */
  68       if (locale->copy_name[LC_PAPER] != NULL)
  69         {
  70           /* Find the copying locale.  This has to happen transitively since
  71              the locale we are copying from might also copying another one.  */
  72           struct localedef_t *from = locale;
  73
  74           do
  75             from = find_locale (LC_PAPER, from->copy_name[LC_PAPER],
  76                                 from->repertoire_name, charmap);
  77           while (from->categories[LC_PAPER].paper == NULL
  78                  && from->copy_name[LC_PAPER] != NULL);
  79
  80           paper = locale->categories[LC_PAPER].paper
  81             = from->categories[LC_PAPER].paper;
  82         }
  83
  84       /* If there is still no definition issue an warning and create an
  85          empty one.  */
  86       if (paper == NULL)
  87         {
  88           record_warning (_("\
  89 No definition for %s category found"), "LC_PAPER");
  90           paper_startup (NULL, locale, 0);
  91           paper = locale->categories[LC_PAPER].paper;
  92           nothing = 1;
  93         }
  94     }
  95
  96   if (paper->height == 0)
  97     {
  98       if (! nothing)
  99         record_error (0, 0, _("%s: field `%s' not defined"),
 100                       "LC_PAPER", "height");
 101       /* Use as default values the values from the i18n locale.  */
 102       paper->height = 297;
 103     }
 104
 105   if (paper->width == 0)
 106     {
 107       if (! nothing)
 108         record_error (0, 0, _("%s: field `%s' not defined"),
 109                       "LC_PAPER", "width");
 110       /* Use as default values the values from the i18n locale.  */
 111       paper->width = 210;
 112     }
 113 }
 114
 115
 116 void
 117 paper_output (struct localedef_t *locale, const struct charmap_t *charmap,
 118               const char *output_path)
 119 {
 120   struct locale_paper_t *paper = locale->categories[LC_PAPER].paper;
 121   struct locale_file file;
 122
 123   init_locale_data (&file, _NL_ITEM_INDEX (_NL_NUM_LC_PAPER));
 124   add_locale_uint32 (&file, paper->height);
 125   add_locale_uint32 (&file, paper->width);
 126   add_locale_string (&file, charmap->code_set_name);
 127   write_locale_data (output_path, LC_PAPER, "LC_PAPER", &file);
 128 }
 129
 130
 131 /* The parser for the LC_PAPER section of the locale definition.  */
 132 void
 133 paper_read (struct linereader *ldfile, struct localedef_t *result,
 134             const struct charmap_t *charmap, const char *repertoire_name,
 135             int ignore_content)
 136 {
 137   struct locale_paper_t *paper;
 138   struct token *now;
 139   struct token *arg;
 140   enum token_t nowtok;
 141
 142   /* The rest of the line containing `LC_PAPER' must be empty.  */
 143   lr_ignore_rest (ldfile, 1);
 144
 145   do
 146     {
 147       now = lr_token (ldfile, charmap, result, NULL, verbose);
 148       nowtok = now->tok;
 149     }
 150   while (nowtok == tok_eol);
 151
 152   /* If we see `copy' now we are almost done.  */
 153   if (nowtok == tok_copy)
 154     {
 155       handle_copy (ldfile, charmap, repertoire_name, result, tok_lc_paper,
 156                    LC_PAPER, "LC_PAPER", ignore_content);
 157       return;
 158     }
 159
 160   /* Prepare the data structures.  */
 161   paper_startup (ldfile, result, ignore_content);
 162   paper = result->categories[LC_PAPER].paper;
 163
 164   while (1)
 165     {
 166       /* Of course we don't proceed beyond the end of file.  */
 167       if (nowtok == tok_eof)
 168         break;
 169
 170       /* Ingore empty lines.  */
 171       if (nowtok == tok_eol)
 172         {
 173           now = lr_token (ldfile, charmap, result, NULL, verbose);
 174           nowtok = now->tok;
 175           continue;
 176         }
 177
 178       switch (nowtok)
 179         {
 180 #define INT_ELEM(cat) \
 181         case tok_##cat:                                                       \
 182           /* Ignore the rest of the line if we don't need the input of        \
 183              this line.  */                                                   \
 184           if (ignore_content)                                                 \
 185             {                                                                 \
 186               lr_ignore_rest (ldfile, 0);                                     \
 187               break;                                                          \
 188             }                                                                 \
 189                                                                               \
 190           arg = lr_token (ldfile, charmap, result, NULL, verbose);            \
 191           if (arg->tok != tok_number)                                         \
 192             goto err_label;                                                   \
 193           else if (paper->cat != 0)                                           \
 194             lr_error (ldfile, _("%s: field `%s' declared more than once"),    \
 195                       "LC_PAPER", #cat);                                      \
 196           else if (!ignore_content)                                           \
 197             paper->cat = arg->val.num;                                        \
 198           break
 199
 200           INT_ELEM (height);
 201           INT_ELEM (width);
 202
 203         case tok_end:
 204           /* Next we assume `LC_PAPER'.  */
 205           arg = lr_token (ldfile, charmap, result, NULL, verbose);
 206           if (arg->tok == tok_eof)
 207             break;
 208           if (arg->tok == tok_eol)
 209             lr_error (ldfile, _("%s: incomplete `END' line"), "LC_PAPER");
 210           else if (arg->tok != tok_lc_paper)
 211             lr_error (ldfile, _("\
 212 %1$s: definition does not end with `END %1$s'"), "LC_PAPER");
 213           lr_ignore_rest (ldfile, arg->tok == tok_lc_paper);
 214           return;
 215
 216         default:
 217         err_label:
 218           SYNTAX_ERROR (_("%s: syntax error"), "LC_PAPER");
 219         }
 220
 221       /* Prepare for the next round.  */
 222       now = lr_token (ldfile, charmap, result, NULL, verbose);
 223       nowtok = now->tok;
 224     }
 225
 226   /* When we come here we reached the end of the file.  */
 227   lr_error (ldfile, _("%s: premature end of file"), "LC_PAPER");
 228 }