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 2 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, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <stdio.h>
  25 #include <fcntl.h>
  26 #include <ctype.h>
  27
  28 #include "config.h"
  29 #include "misc.h"
  30 #include "lf.h"
  31 #include "table.h"
  32
  33 #ifdef HAVE_UNISTD_H
  34 #include <unistd.h>
  35 #endif
  36
  37 #ifdef HAVE_STDLIB_H
  38 #include <stdlib.h>
  39 #endif
  40
  41 struct _table {
  42   size_t size;
  43   char *buffer;
  44   char *pos;
  45   int line_nr;
  46   int nr_fields;
  47   int nr_model_fields;
  48   char *file_name;
  49 };
  50
  51 extern table *
  52 table_open(char *file_name,
  53            int nr_fields,
  54            int nr_model_fields)
  55 {
  56   int fd;
  57   struct stat stat_buf;
  58   table *file;
  59
  60   /* create a file descriptor */
  61   file = ZALLOC(table);
  62   ASSERT(file != NULL);
  63   file->nr_fields = nr_fields;
  64   file->nr_model_fields = nr_model_fields;
  65
  66   /* save the file name */
  67   file->file_name = (char*)zalloc(strlen(file_name) + 1);
  68   ASSERT(file->file_name != NULL);
  69   strcpy(file->file_name, file_name);
  70
  71   /* open the file */
  72   fd = open(file->file_name, O_RDONLY, 0);
  73   ASSERT(fd >= 0);
  74
  75   /* determine the size */
  76   if (fstat(fd, &stat_buf) < 0) {
  77     perror("table_open.fstat");
  78     exit(1);
  79   }
  80   file->size = stat_buf.st_size;
  81
  82   /* allocate this much memory */
  83   file->buffer = (char*)zalloc(file->size+1);
  84   if(file->buffer == NULL) {
  85     perror("table_open.calloc.file->size+1");
  86     exit(1);
  87   }
  88   file->pos = file->buffer;
  89
  90   /* read it in */
  91   if (read(fd, file->buffer, file->size) < file->size) {
  92     perror("table_open.read");
  93     exit(1);
  94   }
  95   file->buffer[file->size] = '\0';
  96
  97   /* done */
  98   close(fd);
  99   return file;
 100 }
 101
 102
 103 extern table_entry *
 104 table_entry_read(table *file)
 105 {
 106   int field;
 107   table_entry *entry;
 108
 109   /* skip comments/blanks */
 110   while(1) {
 111     /* leading white space */
 112     while (*file->pos != '\0'
 113            && *file->pos != '\n'
 114            && isspace(*file->pos))
 115       file->pos++;
 116     /* comment */
 117     if (*file->pos == '#') {
 118       do {
 119         file->pos++;
 120       } while (*file->pos != '\0' && *file->pos != '\n');
 121     }
 122     /* end of line? */
 123     if (*file->pos == '\n') {
 124       file->pos++;
 125       file->line_nr++;
 126     }
 127     else
 128       break;
 129   }
 130   if (*file->pos == '\0')
 131     return NULL;
 132
 133   /* create this new entry */
 134   entry = (table_entry*)zalloc(sizeof(table_entry)
 135                                + (file->nr_fields + 1) * sizeof(char*));
 136   ASSERT(entry != NULL);
 137   entry->file_name = file->file_name;
 138   entry->nr_fields = file->nr_fields;
 139
 140   /* break the line into its colon delimitered fields */
 141   for (field = 0; field < file->nr_fields-1; field++) {
 142     entry->fields[field] = file->pos;
 143     while(*file->pos && *file->pos != ':' && *file->pos != '\n')
 144       file->pos++;
 145     if (*file->pos == ':') {
 146       *file->pos = '\0';
 147       file->pos++;
 148     }
 149   }
 150
 151   /* any trailing stuff not the last field */
 152   ASSERT(field == file->nr_fields-1);
 153   entry->fields[field] = file->pos;
 154   while (*file->pos && *file->pos != '\n') {
 155     file->pos++;
 156   }
 157   if (*file->pos == '\n') {
 158     *file->pos = '\0';
 159     file->pos++;
 160   }
 161   file->line_nr++;
 162   entry->line_nr = file->line_nr;
 163
 164   /* if following lines begin with a star, add them to the model
 165      section.  */
 166   while ((file->nr_model_fields > 0) && (*file->pos == '*')) {
 167     table_model_entry *model = (table_model_entry*)zalloc(sizeof(table_model_entry)
 168                                                           + (file->nr_model_fields + 1) * sizeof(char*));
 169     if (entry->model_last)
 170       entry->model_last->next = model;
 171     else
 172       entry->model_first = model;
 173     entry->model_last = model;
 174
 175     /* break the line into its colon delimitered fields */
 176     file->pos++;
 177     for (field = 0; field < file->nr_model_fields-1; field++) {
 178       model->fields[field] = file->pos;
 179       while(*file->pos && *file->pos != ':' && *file->pos != '\n')
 180         file->pos++;
 181       if (*file->pos == ':') {
 182         *file->pos = '\0';
 183         file->pos++;
 184       }
 185     }
 186
 187     /* any trailing stuff not the last field */
 188     ASSERT(field == file->nr_model_fields-1);
 189     model->fields[field] = file->pos;
 190     while (*file->pos && *file->pos != '\n') {
 191       file->pos++;
 192     }
 193     if (*file->pos == '\n') {
 194       *file->pos = '\0';
 195       file->pos++;
 196     }
 197
 198     file->line_nr++;
 199     model->line_nr = file->line_nr;
 200   }
 201
 202   /* if following lines are tab indented, put in the annex */
 203   if (*file->pos == '\t') {
 204     entry->annex = file->pos;
 205     do {
 206       do {
 207         file->pos++;
 208       } while (*file->pos != '\0' && *file->pos != '\n');
 209       if (*file->pos == '\n') {
 210         char *save_pos = ++file->pos;
 211         int extra_lines = 0;
 212         file->line_nr++;
 213         /* Allow tab indented to have blank lines */
 214         while (*save_pos == '\n') {
 215           save_pos++;
 216           extra_lines++;
 217         }
 218         if (*save_pos == '\t') {
 219           file->pos = save_pos;
 220           file->line_nr += extra_lines;
 221         }
 222       }
 223     } while (*file->pos != '\0' && *file->pos == '\t');
 224     if (file->pos[-1] == '\n')
 225       file->pos[-1] = '\0';
 226   }
 227   else
 228     entry->annex = NULL;
 229
 230   /* return it */
 231   return entry;
 232
 233 }
 234
 235
 236 extern void
 237 dump_table_entry(table_entry *entry,
 238                  int indent)
 239 {
 240   printf("(table_entry*)%p\n", entry);
 241
 242   if (entry != NULL) {
 243     int field;
 244     char sep;
 245
 246     sep = ' ';
 247     dumpf(indent, "(fields");
 248     for (field = 0; field < entry->nr_fields; field++) {
 249       printf("%c%s", sep, entry->fields[field]);
 250       sep = ':';
 251     }
 252     printf(")\n");
 253
 254     dumpf(indent, "(line_nr %d)\n", entry->line_nr);
 255
 256     dumpf(indent, "(file_name %s)\n", entry->file_name);
 257
 258     dumpf(indent, "(annex\n%s\n", entry->annex);
 259     dumpf(indent, " )\n");
 260
 261   }
 262 }
 263
 264
 265 extern void
 266 table_entry_lf_c_line_nr(lf *file,
 267                          table_entry *entry)
 268 {
 269   lf_print_c_line_nr(file, entry->line_nr, entry->file_name);
 270 }
 271
 272