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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 <fcntl.h>

#include <getopt.h>

#include <stdio.h>

#include <ctype.h>

#include <stdarg.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

#ifdef HAVE_STRING_H

#include <string.h>

#else

#ifdef HAVE_STRINGS_H

#include <strings.h>

#endif

#endif

/****************************************************************/

int spreg_lookup_table = 1;

enum {

  nr_of_sprs = 1024,

};

/****************************************************************/

typedef enum {

  spreg_name,

  spreg_reg_nr,

  spreg_readonly,

  spreg_length,

  nr_spreg_fields,

} spreg_fields;

typedef struct _spreg_table_entry spreg_table_entry;

struct _spreg_table_entry {

  char *name;

  int spreg_nr;

  int is_readonly;

  int length;

  table_entry *entry;

  spreg_table_entry *next;

};

typedef struct _spreg_table spreg_table;

struct _spreg_table {

  spreg_table_entry *sprs;

};

static void

spreg_table_insert(spreg_table *table, table_entry *entry)

{

  /* create a new spr entry */

  spreg_table_entry *new_spr = ZALLOC(spreg_table_entry);

  new_spr->next = NULL;

  new_spr->entry = entry;

  new_spr->spreg_nr = atoi(entry->fields[spreg_reg_nr]);

  new_spr->is_readonly = (entry->fields[spreg_readonly]

                          ? atoi(entry->fields[spreg_readonly])

                          : 0);

  new_spr->length = atoi(entry->fields[spreg_length]);

  new_spr->name = (char*)zalloc(strlen(entry->fields[spreg_name]) + 1);

  ASSERT(new_spr->name != NULL);

  {

    int i;

    for (i = 0; entry->fields[spreg_name][i] != '\0'; i++) {

      if (isupper(entry->fields[spreg_name][i]))

        new_spr->name[i] = tolower(entry->fields[spreg_name][i]);

      else

        new_spr->name[i] = entry->fields[spreg_name][i];

    }

  }

  /* insert, by spreg_nr order */

  {

    spreg_table_entry **ptr_to_spreg_entry = &table->sprs;

    spreg_table_entry *spreg_entry = *ptr_to_spreg_entry;

    while (spreg_entry != NULL && spreg_entry->spreg_nr < new_spr->spreg_nr) {

      ptr_to_spreg_entry = &spreg_entry->next;

      spreg_entry = *ptr_to_spreg_entry;

    }

    ASSERT(spreg_entry == NULL || spreg_entry->spreg_nr != new_spr->spreg_nr);

    *ptr_to_spreg_entry = new_spr;

    new_spr->next = spreg_entry;

  }

}

static spreg_table *

spreg_table_load(char *file_name)

{

  table *file = table_open(file_name, nr_spreg_fields, 0);

  spreg_table *table = ZALLOC(spreg_table);

  {

    table_entry *entry;

    while ((entry = table_entry_read(file)) != NULL) {

      spreg_table_insert(table, entry);

    }

  }

  return table;

}

/****************************************************************/

char *spreg_attributes[] = {

  "is_valid",

  "is_readonly",

  "name",

  "index",

  "length",

};

static void

gen_spreg_h(spreg_table *table, lf *file)

{

  spreg_table_entry *entry;

  char **attribute;

  lf_print__gnu_copyleft(file);

  lf_printf(file, "\n");

  lf_printf(file, "#ifndef _SPREG_H_\n");

  lf_printf(file, "#define _SPREG_H_\n");

  lf_printf(file, "\n");

  lf_printf(file, "typedef unsigned_word spreg;\n");

  lf_printf(file, "\n");

  lf_printf(file, "typedef enum {\n");

  for (entry = table->sprs;

       entry != NULL ;

       entry = entry->next) {

    lf_printf(file, "  spr_%s = %d,\n", entry->name, entry->spreg_nr);

  }

  lf_printf(file, "  nr_of_sprs = %d\n", nr_of_sprs);

  lf_printf(file, "} sprs;\n");

  lf_printf(file, "\n");

  for (attribute = spreg_attributes;

       *attribute != NULL;

       attribute++) {

    if (strcmp(*attribute, "name") == 0) {

      lf_print_function_type(file, "const char *", "INLINE_SPREG", " ");

      lf_printf(file, "spr_%s(sprs spr);\n", *attribute);

    }

    else {

      lf_print_function_type(file, "int", "INLINE_SPREG", " ");

      lf_printf(file, "spr_%s(sprs spr);\n", *attribute);

    }

  }

  lf_printf(file, "\n");

  lf_printf(file, "#endif /* _SPREG_H_ */\n");

}

static void

gen_spreg_c(spreg_table *table, lf *file)

{

  spreg_table_entry *entry;

  char **attribute;

  int spreg_nr;

  lf_print__gnu_copyleft(file);

  lf_printf(file, "\n");

  lf_printf(file, "#ifndef _SPREG_C_\n");

  lf_printf(file, "#define _SPREG_C_\n");

  lf_printf(file, "\n");

  lf_printf(file, "#include \"basics.h\"\n");

  lf_printf(file, "#include \"spreg.h\"\n");

  lf_printf(file, "\n");

  lf_printf(file, "typedef struct _spreg_info {\n");

  lf_printf(file, "  char *name;\n");

  lf_printf(file, "  int is_valid;\n");

  lf_printf(file, "  int length;\n");

  lf_printf(file, "  int is_readonly;\n");

  lf_printf(file, "  int index;\n");

  lf_printf(file, "} spreg_info;\n");

  lf_printf(file, "\n");

  lf_printf(file, "static spreg_info spr_info[nr_of_sprs+1] = {\n");

  entry = table->sprs;

  for (spreg_nr = 0; spreg_nr < nr_of_sprs+1; spreg_nr++) {

    if (entry == NULL || spreg_nr < entry->spreg_nr)

      lf_printf(file, "  { 0, 0, 0, 0, %d},\n", spreg_nr);

    else {

      lf_printf(file, "  { \"%s\", %d, %d, %d, spr_%s /*%d*/ },\n",

                entry->name, 1, entry->length, entry->is_readonly,

                entry->name, entry->spreg_nr);

      entry = entry->next;

    }

  }

  lf_printf(file, "};\n");

  for (attribute = spreg_attributes;

       *attribute != NULL;

       attribute++) {

    lf_printf(file, "\n");

    if (strcmp(*attribute, "name") == 0) {

      lf_print_function_type(file, "const char *", "INLINE_SPREG", "\n");

    }

    else {

      lf_print_function_type(file, "int", "INLINE_SPREG", "\n");

    }

    lf_printf(file, "spr_%s(sprs spr)\n", *attribute);

    lf_printf(file, "{\n");

    if (spreg_lookup_table

        || strcmp(*attribute, "name") == 0

        || strcmp(*attribute, "index") == 0)

      lf_printf(file, "  return spr_info[spr].%s;\n",

                *attribute);

    else {

      spreg_table_entry *entry;

      lf_printf(file, "  switch (spr) {\n");

      for (entry = table->sprs; entry != NULL; entry = entry->next) {

        lf_printf(file, "  case %d:\n", entry->spreg_nr);

        if (strcmp(*attribute, "is_valid") == 0)

          lf_printf(file, "    return 1;\n");

        else if (strcmp(*attribute, "is_readonly") == 0)

          lf_printf(file, "    return %d;\n", entry->is_readonly);

        else if (strcmp(*attribute, "length") == 0)

          lf_printf(file, "    return %d;\n", entry->length);

        else

          ASSERT(0);

      }

      lf_printf(file, "  default:\n");

      lf_printf(file, "    return 0;\n");

      lf_printf(file, "  }\n");

    }

    lf_printf(file, "}\n");

  }

  lf_printf(file, "\n");

  lf_printf(file, "#endif /* _SPREG_C_ */\n");

}

/****************************************************************/

int

main(int argc,

     char **argv,

     char **envp)

{

  lf_file_references file_references = lf_include_references;

  spreg_table *sprs = NULL;

  char *real_file_name = NULL;

  int is_header = 0;

  int ch;

  if (argc <= 1) {

    printf("Usage: dgen ...\n");

    printf("-s  Use switch instead of table\n");

    printf("-n <file-name>  Use this as cpp line numbering name\n");

    printf("-h  Output header file\n");

    printf("-p <spreg-file>  Output spreg.h(P) or spreg.c(p)\n");

    printf("-L  Suppress cpp line numbering in output files\n");

  }

  while ((ch = getopt(argc, argv, "hLsn:r:p:")) != -1) {

    fprintf(stderr, "\t-%c %s\n", ch, ( optarg ? optarg : ""));

    switch(ch) {

    case 's':

      spreg_lookup_table = 0;

      break;

    case 'r':

      sprs = spreg_table_load(optarg);

      break;

    case 'n':

      real_file_name = strdup(optarg);

      break;

    case 'L':

      file_references = lf_omit_references;

      break;

    case 'h':

      is_header = 1;

      break;

    case 'p':

      {

        lf *file = lf_open(optarg, real_file_name, file_references,

                           (is_header ? lf_is_h : lf_is_c),

                           argv[0]);

        if (is_header)

          gen_spreg_h(sprs, file);

        else

          gen_spreg_c(sprs, file);

        lf_close(file);

        is_header = 0;

      }

      real_file_name = NULL;

      break;

    default:

      error("unknown option\n");

    }

  }

  return 0;

}