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 #include <unistd.h>
  33 #include <stdlib.h>
  34
  35 typedef struct _open_table open_table;
  36 struct _open_table {
  37   size_t size;
  38   char *buffer;
  39   char *pos;
  40   int line_nr;
  41   int nr_fields;
  42   int nr_model_fields;
  43   char *file_name;
  44   open_table *parent;
  45   table *root;
  46 };
  47 struct _table {
  48   open_table *current;
  49 };
  50
  51 void
  52 table_push (table *root,
  53             table_include *includes,
  54             const char *file_name,
  55             int nr_fields,
  56             int nr_model_fields)
  57
  58 {
  59   int fd;
  60   struct stat stat_buf;
  61   open_table *file;
  62   table_include dummy;
  63   table_include *include = &dummy;
  64   int nr;
  65
  66   /* dummy up a search of this directory */
  67   dummy.next = includes;
  68   dummy.dir = "";
  69
  70   /* create a file descriptor */
  71   file = ZALLOC (open_table);
  72   ASSERT(file != NULL);
  73   file->nr_fields = nr_fields;
  74   file->nr_model_fields = nr_model_fields;
  75   file->root = root;
  76   file->parent = root->current;
  77   root->current = file;
  78
  79   while (1)
  80     {
  81       /* save the file name */
  82       char *dup_name = NZALLOC (char, strlen (include->dir) + strlen (file_name) + 2);
  83       if (dup_name == NULL)
  84         {
  85           perror (file_name);
  86           exit (1);
  87         }
  88       if (include->dir[0] != '\0')
  89         {
  90           strcat (dup_name, include->dir);
  91           strcat (dup_name, "/");
  92         }
  93       strcat (dup_name, file_name);
  94       file->file_name = dup_name;
  95       /* open the file */
  96       fd = open (dup_name, O_RDONLY, 0);
  97       if (fd >= 0)
  98         break;
  99       /* free (dup_name); */
 100       if (include->next == NULL)
 101         {
 102           error ("Problem opening file `%s'\n", file_name);
 103           perror (file_name);
 104           exit (1);
 105         }
 106       include = include->next;
 107   }
 108
 109   /* determine the size */
 110   if (fstat(fd, &stat_buf) < 0) {
 111     perror("table_open.fstat");
 112     exit(1);
 113   }
 114   file->size = stat_buf.st_size;
 115
 116   /* allocate this much memory */
 117   file->buffer = (char*)zalloc(file->size+1);
 118   if(file->buffer == NULL) {
 119     perror("table_open.calloc.file->size+1");
 120     exit(1);
 121   }
 122   file->pos = file->buffer;
 123
 124   /* read it in */
 125 #ifdef __CYGWIN32__
 126   if ((file->size) && ((nr = read(fd, file->buffer, file->size)) <= 0)) {
 127 #else
 128   if ((nr = read(fd, file->buffer, file->size)) < file->size) {
 129 #endif
 130     perror("table_open.read");
 131     exit(1);
 132   }
 133   file->size = nr;
 134   file->buffer[file->size] = '\0';
 135
 136   /* done */
 137   close(fd);
 138 }
 139
 140 extern table *
 141 table_open(const char *file_name,
 142            int nr_fields,
 143            int nr_model_fields)
 144 {
 145   table *root;
 146
 147   /* create a file descriptor */
 148   root = ZALLOC (table);
 149   if (root == NULL)
 150     {
 151       perror (file_name);
 152       exit (1);
 153     }
 154
 155   table_push (root, NULL, file_name, nr_fields, nr_model_fields);
 156   return root;
 157 }
 158
 159 extern table_entry *
 160 table_entry_read(table *root)
 161 {
 162   open_table *file = root->current;
 163   int field;
 164   table_entry *entry;
 165
 166   /* skip comments/blanks */
 167   while(1) {
 168     /* end-of-file? */
 169     while (*file->pos == '\0')
 170       {
 171         if (file->parent != NULL)
 172           {
 173             file = file->parent;
 174             root->current = file;
 175           }
 176         else
 177           return NULL;
 178       }
 179     /* leading white space */
 180     while (*file->pos != '\0'
 181            && *file->pos != '\n'
 182            && isspace(*file->pos))
 183       file->pos++;
 184     /* comment */
 185     if (*file->pos == '#') {
 186       do {
 187         file->pos++;
 188       } while (*file->pos != '\0' && *file->pos != '\n');
 189     }
 190     /* end of line? */
 191     if (*file->pos == '\n') {
 192       file->pos++;
 193       file->line_nr++;
 194     }
 195     else
 196       break;
 197   }
 198
 199   /* create this new entry */
 200   entry = (table_entry*)zalloc(sizeof(table_entry)
 201                                + (file->nr_fields + 1) * sizeof(char*));
 202   ASSERT(entry != NULL);
 203   entry->file_name = file->file_name;
 204   entry->nr_fields = file->nr_fields;
 205
 206   /* break the line into its colon delimitered fields */
 207   for (field = 0; field < file->nr_fields-1; field++) {
 208     entry->fields[field] = file->pos;
 209     while(*file->pos && *file->pos != ':' && *file->pos != '\n' && *file->pos != '\r')
 210       file->pos++;
 211     if (*file->pos == ':') {
 212       *file->pos = '\0';
 213       file->pos++;
 214     }
 215   }
 216
 217   /* any trailing stuff not the last field */
 218   ASSERT(field == file->nr_fields-1);
 219   entry->fields[field] = file->pos;
 220   while (*file->pos && *file->pos != '\n' && *file->pos != '\r') {
 221     file->pos++;
 222   }
 223   if (*file->pos == '\r') {
 224     *file->pos = '\0';
 225     file->pos++;
 226   }
 227   if (*file->pos == '\n') {
 228     *file->pos = '\0';
 229     file->pos++;
 230   }
 231   file->line_nr++;
 232
 233   /* if following lines begin with a star, add them to the model
 234      section.  */
 235   while ((file->nr_model_fields > 0) && (*file->pos == '*')) {
 236     table_model_entry *model = (table_model_entry*)zalloc(sizeof(table_model_entry)
 237                                                           + (file->nr_model_fields + 1) * sizeof(char*));
 238     if (entry->model_last)
 239       entry->model_last->next = model;
 240     else
 241       entry->model_first = model;
 242     entry->model_last = model;
 243
 244     /* break the line into its colon delimitered fields */
 245     file->pos++;
 246     for (field = 0; field < file->nr_model_fields-1; field++) {
 247       model->fields[field] = file->pos;
 248       while(*file->pos && *file->pos != ':' && *file->pos != '\n' && *file->pos != '\r')
 249         file->pos++;
 250       if (*file->pos == ':') {
 251         *file->pos = '\0';
 252         file->pos++;
 253       }
 254     }
 255
 256     /* any trailing stuff not the last field */
 257     ASSERT(field == file->nr_model_fields-1);
 258     model->fields[field] = file->pos;
 259     while (*file->pos && *file->pos != '\n' && *file->pos != '\r') {
 260       file->pos++;
 261     }
 262     if (*file->pos == '\r') {
 263       *file->pos = '\0';
 264       file->pos++;
 265     }
 266     if (*file->pos == '\n') {
 267       *file->pos = '\0';
 268       file->pos++;
 269     }
 270
 271     file->line_nr++;
 272     model->line_nr = file->line_nr;
 273   }
 274
 275   entry->line_nr = file->line_nr;
 276
 277   /* if following lines are tab indented, put in the annex */
 278   if (*file->pos == '\t') {
 279     entry->annex = file->pos;
 280     do {
 281       do {
 282         file->pos++;
 283       } while (*file->pos != '\0' && *file->pos != '\n' && *file->pos != '\r');
 284       if (*file->pos == '\n' || *file->pos == '\r') {
 285         char *save_pos = ++file->pos;
 286         int extra_lines = 0;
 287         file->line_nr++;
 288         /* Allow tab indented to have blank lines */
 289         while (*save_pos == '\n' || *save_pos == '\r') {
 290           save_pos++;
 291           extra_lines++;
 292         }
 293         if (*save_pos == '\t') {
 294           file->pos = save_pos;
 295           file->line_nr += extra_lines;
 296         }
 297       }
 298     } while (*file->pos != '\0' && *file->pos == '\t');
 299     if (file->pos[-1] == '\n' || file->pos[-1] == '\r')
 300       file->pos[-1] = '\0';
 301   }
 302   else
 303     entry->annex = NULL;
 304
 305   /* return it */
 306   return entry;
 307
 308 }
 309
 310
 311 extern void
 312 dump_table_entry(table_entry *entry,
 313                  int indent)
 314 {
 315   printf("(table_entry*)%p\n", entry);
 316
 317   if (entry != NULL) {
 318     int field;
 319     char sep;
 320
 321     sep = ' ';
 322     dumpf(indent, "(fields");
 323     for (field = 0; field < entry->nr_fields; field++) {
 324       printf("%c%s", sep, entry->fields[field]);
 325       sep = ':';
 326     }
 327     printf(")\n");
 328
 329     dumpf(indent, "(line_nr %d)\n", entry->line_nr);
 330
 331     dumpf(indent, "(file_name %s)\n", entry->file_name);
 332
 333     dumpf(indent, "(annex\n%s\n", entry->annex);
 334     dumpf(indent, " )\n");
 335
 336   }
 337 }
 338
 339
 340 extern void
 341 table_entry_print_cpp_line_nr(lf *file,
 342                               table_entry *entry)
 343 {
 344   lf_print__external_reference(file, entry->line_nr, entry->file_name);
 345 }
 346
 347