sim/ppc/table.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, see <http://www.gnu.org/licenses/>.
  17
  18     */
  19
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <stdio.h>
  24 #include <fcntl.h>
  25 #include <ctype.h>
  26
  27 #include "build-config.h"
  28 #include "misc.h"
  29 #include "lf.h"
  30 #include "table.h"
  31
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>
  34 #endif
  35 #include <stdlib.h>
  36
  37 typedef struct _open_table open_table;
  38 struct _open_table {
  39   size_t size;
  40   char *buffer;
  41   char *pos;
  42   int line_nr;
  43   int nr_fields;
  44   int nr_model_fields;
  45   char *file_name;
  46   open_table *parent;
  47   table *root;
  48 };
  49 struct _table {
  50   open_table *current;
  51 };
  52
  53 void
  54 table_push (table *root,
  55             table_include *includes,
  56             const char *file_name,
  57             int nr_fields,
  58             int nr_model_fields)
  59
  60 {
  61   int fd;
  62   struct stat stat_buf;
  63   open_table *file;
  64   table_include dummy;
  65   table_include *include = &dummy;
  66   int nr;
  67
  68   /* dummy up a search of this directory */
  69   dummy.next = includes;
  70   dummy.dir = "";
  71
  72   /* create a file descriptor */
  73   file = ZALLOC (open_table);
  74   ASSERT(file != NULL);
  75   file->nr_fields = nr_fields;
  76   file->nr_model_fields = nr_model_fields;
  77   file->root = root;
  78   file->parent = root->current;
  79   root->current = file;
  80
  81   while (1)
  82     {
  83       /* save the file name */
  84       char *dup_name = NZALLOC (char, strlen (include->dir) + strlen (file_name) + 2);
  85       if (dup_name == NULL)
  86         {
  87           perror (file_name);
  88           exit (1);
  89         }
  90       if (include->dir[0] != '\0')
  91         {
  92           strcat (dup_name, include->dir);
  93           strcat (dup_name, "/");
  94         }
  95       strcat (dup_name, file_name);
  96       file->file_name = dup_name;
  97       /* open the file */
  98       fd = open (dup_name, O_RDONLY, 0);
  99       if (fd >= 0)
 100         break;
 101       /* free (dup_name); */
 102       if (include->next == NULL)
 103         {
 104           error ("Problem opening file `%s'\n", file_name);
 105           perror (file_name);
 106           exit (1);
 107         }
 108       include = include->next;
 109   }
 110
 111   /* determine the size */
 112   if (fstat(fd, &stat_buf) < 0) {
 113     perror("table_open.fstat");
 114     exit(1);
 115   }
 116   file->size = stat_buf.st_size;
 117
 118   /* allocate this much memory */
 119   file->buffer = (char*)zalloc(file->size+1);
 120   if(file->buffer == NULL) {
 121     perror("table_open.calloc.file->size+1");
 122     exit(1);
 123   }
 124   file->pos = file->buffer;
 125
 126   /* read it in */
 127 #ifdef __CYGWIN32__
 128   if ((file->size) && ((nr = read(fd, file->buffer, file->size)) <= 0)) {
 129 #else
 130   if ((nr = read(fd, file->buffer, file->size)) < file->size) {
 131 #endif
 132     perror("table_open.read");
 133     exit(1);
 134   }
 135   file->size = nr;
 136   file->buffer[file->size] = '\0';
 137
 138   /* done */
 139   close(fd);
 140 }
 141
 142 extern table *
 143 table_open(const char *file_name,
 144            int nr_fields,
 145            int nr_model_fields)
 146 {
 147   table *root;
 148
 149   /* create a file descriptor */
 150   root = ZALLOC (table);
 151   if (root == NULL)
 152     {
 153       perror (file_name);
 154       exit (1);
 155     }
 156
 157   table_push (root, NULL, file_name, nr_fields, nr_model_fields);
 158   return root;
 159 }
 160
 161 extern table_entry *
 162 table_entry_read(table *root)
 163 {
 164   open_table *file = root->current;
 165   int field;
 166   table_entry *entry;
 167
 168   /* skip comments/blanks */
 169   while(1) {
 170     /* end-of-file? */
 171     while (*file->pos == '\0')
 172       {
 173         if (file->parent != NULL)
 174           {
 175             file = file->parent;
 176             root->current = file;
 177           }
 178         else
 179           return NULL;
 180       }
 181     /* leading white space */
 182     while (*file->pos != '\0'
 183            && *file->pos != '\n'
 184            && isspace(*file->pos))
 185       file->pos++;
 186     /* comment */
 187     if (*file->pos == '#') {
 188       do {
 189         file->pos++;
 190       } while (*file->pos != '\0' && *file->pos != '\n');
 191     }
 192     /* end of line? */
 193     if (*file->pos == '\n') {
 194       file->pos++;
 195       file->line_nr++;
 196     }
 197     else
 198       break;
 199   }
 200
 201   /* create this new entry */
 202   entry = (table_entry*)zalloc(sizeof(table_entry)
 203                                + (file->nr_fields + 1) * sizeof(char*));
 204   ASSERT(entry != NULL);
 205   entry->file_name = file->file_name;
 206   entry->nr_fields = file->nr_fields;
 207
 208   /* break the line into its colon delimitered fields */
 209   for (field = 0; field < file->nr_fields-1; field++) {
 210     entry->fields[field] = file->pos;
 211     while(*file->pos && *file->pos != ':' && *file->pos != '\n')
 212       file->pos++;
 213     if (*file->pos == ':') {
 214       *file->pos = '\0';
 215       file->pos++;
 216     }
 217   }
 218
 219   /* any trailing stuff not the last field */
 220   ASSERT(field == file->nr_fields-1);
 221   entry->fields[field] = file->pos;
 222   while (*file->pos && *file->pos != '\n') {
 223     file->pos++;
 224   }
 225   if (*file->pos == '\n') {
 226     *file->pos = '\0';
 227     file->pos++;
 228   }
 229   file->line_nr++;
 230
 231   /* if following lines begin with a star, add them to the model
 232      section.  */
 233   while ((file->nr_model_fields > 0) && (*file->pos == '*')) {
 234     table_model_entry *model = (table_model_entry*)zalloc(sizeof(table_model_entry)
 235                                                           + (file->nr_model_fields + 1) * sizeof(char*));
 236     if (entry->model_last)
 237       entry->model_last->next = model;
 238     else
 239       entry->model_first = model;
 240     entry->model_last = model;
 241
 242     /* break the line into its colon delimitered fields */
 243     file->pos++;
 244     for (field = 0; field < file->nr_model_fields-1; field++) {
 245       model->fields[field] = file->pos;
 246       while(*file->pos && *file->pos != ':' && *file->pos != '\n')
 247         file->pos++;
 248       if (*file->pos == ':') {
 249         *file->pos = '\0';
 250         file->pos++;
 251       }
 252     }
 253
 254     /* any trailing stuff not the last field */
 255     ASSERT(field == file->nr_model_fields-1);
 256     model->fields[field] = file->pos;
 257     while (*file->pos && *file->pos != '\n') {
 258       file->pos++;
 259     }
 260     if (*file->pos == '\n') {
 261       *file->pos = '\0';
 262       file->pos++;
 263     }
 264
 265     file->line_nr++;
 266     model->line_nr = file->line_nr;
 267   }
 268
 269   entry->line_nr = file->line_nr;
 270
 271   /* if following lines are tab indented, put in the annex */
 272   if (*file->pos == '\t') {
 273     entry->annex = file->pos;
 274     do {
 275       do {
 276         file->pos++;
 277       } while (*file->pos != '\0' && *file->pos != '\n');
 278       if (*file->pos == '\n') {
 279         char *save_pos = ++file->pos;
 280         int extra_lines = 0;
 281         file->line_nr++;
 282         /* Allow tab indented to have blank lines */
 283         while (*save_pos == '\n') {
 284           save_pos++;
 285           extra_lines++;
 286         }
 287         if (*save_pos == '\t') {
 288           file->pos = save_pos;
 289           file->line_nr += extra_lines;
 290         }
 291       }
 292     } while (*file->pos != '\0' && *file->pos == '\t');
 293     if (file->pos[-1] == '\n')
 294       file->pos[-1] = '\0';
 295   }
 296   else
 297     entry->annex = NULL;
 298
 299   /* return it */
 300   return entry;
 301
 302 }
 303
 304
 305 extern void
 306 dump_table_entry(table_entry *entry,
 307                  int indent)
 308 {
 309   printf("(table_entry*)%p\n", entry);
 310
 311   if (entry != NULL) {
 312     int field;
 313     char sep;
 314
 315     sep = ' ';
 316     dumpf(indent, "(fields");
 317     for (field = 0; field < entry->nr_fields; field++) {
 318       printf("%c%s", sep, entry->fields[field]);
 319       sep = ':';
 320     }
 321     printf(")\n");
 322
 323     dumpf(indent, "(line_nr %d)\n", entry->line_nr);
 324
 325     dumpf(indent, "(file_name %s)\n", entry->file_name);
 326
 327     dumpf(indent, "(annex\n%s\n", entry->annex);
 328     dumpf(indent, " )\n");
 329
 330   }
 331 }
 332
 333
 334 extern void
 335 table_entry_print_cpp_line_nr(lf *file,
 336                               table_entry *entry)
 337 {
 338   lf_print__external_reference(file, entry->line_nr, entry->file_name);
 339 }
 340
 341