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/*  This file is part of the program psim.

    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    */

#include <sys/types.h>

#include <sys/stat.h>

#include <stdio.h>

#include <fcntl.h>

#include <ctype.h>

#include "config.h"

#include "misc.h"

#include "lf.h"

#include "table.h"

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

struct _table {

  size_t size;

  char *buffer;

  char *pos;

  int line_nr;

  int nr_fields;

  int nr_model_fields;

  char *file_name;

};

extern table *

table_open(const char *file_name,

           int nr_fields,

           int nr_model_fields)

{

  int fd;

  struct stat stat_buf;

  table *file;

  int nr;

  /* create a file descriptor */

  file = ZALLOC(table);

  ASSERT(file != NULL);

  file->nr_fields = nr_fields;

  file->nr_model_fields = nr_model_fields;

  /* save the file name */

  file->file_name = (char*)zalloc(strlen(file_name) + 1);

  ASSERT(file->file_name != NULL);

  strcpy(file->file_name, file_name);

  /* open the file */

  fd = open(file->file_name, O_RDONLY, 0);

  ASSERT(fd >= 0);

  /* determine the size */

  if (fstat(fd, &stat_buf) < 0) {

    perror("table_open.fstat");

    exit(1);

  }

  file->size = stat_buf.st_size;

  /* allocate this much memory */

  file->buffer = (char*)zalloc(file->size+1);

  if(file->buffer == NULL) {

    perror("table_open.calloc.file->size+1");

    exit(1);

  }

  file->pos = file->buffer;

  /* read it in */

#ifdef __CYGWIN32__

  if ((file->size) && ((nr = read(fd, file->buffer, file->size)) <= 0)) {

#else

  if ((nr = read(fd, file->buffer, file->size)) < file->size) {

#endif

    perror("table_open.read");

    exit(1);

  }

  file->size = nr;

  file->buffer[file->size] = '\0';

  /* done */

  close(fd);

  return file;

}

extern table_entry *

table_entry_read(table *file)

{

  int field;

  table_entry *entry;

  /* skip comments/blanks */

  while(1) {

    /* leading white space */

    while (*file->pos != '\0'

           && *file->pos != '\n'

           && isspace(*file->pos))

      file->pos++;

    /* comment */

    if (*file->pos == '#') {

      do {

        file->pos++;

      } while (*file->pos != '\0' && *file->pos != '\n');

    }

    /* end of line? */

    if (*file->pos == '\n') {

      file->pos++;

      file->line_nr++;

    }

    else

      break;

  }

  if (*file->pos == '\0')

    return NULL;

  /* create this new entry */

  entry = (table_entry*)zalloc(sizeof(table_entry)

                               + (file->nr_fields + 1) * sizeof(char*));

  ASSERT(entry != NULL);

  entry->file_name = file->file_name;

  entry->nr_fields = file->nr_fields;

  /* break the line into its colon delimitered fields */

  for (field = 0; field < file->nr_fields-1; field++) {

    entry->fields[field] = file->pos;

    while(*file->pos && *file->pos != ':' && *file->pos != '\n')

      file->pos++;

    if (*file->pos == ':') {

      *file->pos = '\0';

      file->pos++;

    }

  }

  /* any trailing stuff not the last field */

  ASSERT(field == file->nr_fields-1);

  entry->fields[field] = file->pos;

  while (*file->pos && *file->pos != '\n') {

    file->pos++;

  }

  if (*file->pos == '\n') {

    *file->pos = '\0';

    file->pos++;

  }

  file->line_nr++;

  /* if following lines begin with a star, add them to the model

     section.  */

  while ((file->nr_model_fields > 0) && (*file->pos == '*')) {

    table_model_entry *model = (table_model_entry*)zalloc(sizeof(table_model_entry)

                                                          + (file->nr_model_fields + 1) * sizeof(char*));

    if (entry->model_last)

      entry->model_last->next = model;

    else

      entry->model_first = model;

    entry->model_last = model;

    /* break the line into its colon delimitered fields */

    file->pos++;

    for (field = 0; field < file->nr_model_fields-1; field++) {

      model->fields[field] = file->pos;

      while(*file->pos && *file->pos != ':' && *file->pos != '\n')

        file->pos++;

      if (*file->pos == ':') {

        *file->pos = '\0';

        file->pos++;

      }

    }

    /* any trailing stuff not the last field */

    ASSERT(field == file->nr_model_fields-1);

    model->fields[field] = file->pos;

    while (*file->pos && *file->pos != '\n') {

      file->pos++;

    }

    if (*file->pos == '\n') {

      *file->pos = '\0';

      file->pos++;

    }

    file->line_nr++;

    model->line_nr = file->line_nr;

  }

  entry->line_nr = file->line_nr;

  /* if following lines are tab indented, put in the annex */

  if (*file->pos == '\t') {

    entry->annex = file->pos;

    do {

      do {

        file->pos++;

      } while (*file->pos != '\0' && *file->pos != '\n');

      if (*file->pos == '\n') {

        char *save_pos = ++file->pos;

        int extra_lines = 0;

        file->line_nr++;

        /* Allow tab indented to have blank lines */

        while (*save_pos == '\n') {

          save_pos++;

          extra_lines++;

        }

        if (*save_pos == '\t') {

          file->pos = save_pos;

          file->line_nr += extra_lines;

        }

      }

    } while (*file->pos != '\0' && *file->pos == '\t');

    if (file->pos[-1] == '\n')

      file->pos[-1] = '\0';

  }

  else

    entry->annex = NULL;

  /* return it */

  return entry;

}

extern void

dump_table_entry(table_entry *entry,

                 int indent)

{

  printf("(table_entry*)%p\n", entry);

  if (entry != NULL) {

    int field;

    char sep;

    sep = ' ';

    dumpf(indent, "(fields");

    for (field = 0; field < entry->nr_fields; field++) {

      printf("%c%s", sep, entry->fields[field]);

      sep = ':';

    }

    printf(")\n");

    dumpf(indent, "(line_nr %d)\n", entry->line_nr);

    dumpf(indent, "(file_name %s)\n", entry->file_name);

    dumpf(indent, "(annex\n%s\n", entry->annex);

    dumpf(indent, " )\n");

  }

}

extern void

table_entry_print_cpp_line_nr(lf *file,

                              table_entry *entry)

{

  lf_print__external_reference(file, entry->line_nr, entry->file_name);

}