615 lines
12 KiB
C
615 lines
12 KiB
C
/* The IGEN simulator generator for GDB, the GNU Debugger.
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Copyright 2002-2022 Free Software Foundation, Inc.
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Contributed by Andrew Cagney.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include "misc.h"
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#include "lf.h"
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#include "table.h"
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#include <unistd.h>
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#include <stdlib.h>
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typedef struct _open_table open_table;
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struct _open_table
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{
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size_t size;
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char *buffer;
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char *pos;
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line_ref pseudo_line;
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line_ref real_line;
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open_table *parent;
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table *root;
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};
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struct _table
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{
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open_table *current;
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};
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static line_ref *
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current_line (open_table * file)
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{
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line_ref *entry = ZALLOC (line_ref);
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*entry = file->pseudo_line;
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return entry;
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}
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static table_entry *
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new_table_entry (open_table * file, table_entry_type type)
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{
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table_entry *entry;
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entry = ZALLOC (table_entry);
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entry->file = file->root;
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entry->line = current_line (file);
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entry->type = type;
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return entry;
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}
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static void
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set_nr_table_entry_fields (table_entry *entry, int nr_fields)
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{
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entry->field = NZALLOC (char *, nr_fields + 1);
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entry->nr_fields = nr_fields;
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}
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void
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table_push (table *root,
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line_ref *line, table_include *includes, const char *file_name)
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{
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FILE *ff;
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open_table *file;
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table_include dummy;
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table_include *include = &dummy;
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/* dummy up a search of this directory */
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dummy.next = includes;
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dummy.dir = "";
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/* create a file descriptor */
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file = ZALLOC (open_table);
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if (file == NULL)
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{
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perror (file_name);
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exit (1);
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}
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file->root = root;
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file->parent = root->current;
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root->current = file;
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while (1)
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{
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/* save the file name */
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char *dup_name =
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NZALLOC (char, strlen (include->dir) + strlen (file_name) + 2);
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if (dup_name == NULL)
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{
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perror (file_name);
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exit (1);
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}
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if (include->dir[0] != '\0')
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{
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strcat (dup_name, include->dir);
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strcat (dup_name, "/");
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}
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strcat (dup_name, file_name);
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file->real_line.file_name = dup_name;
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file->pseudo_line.file_name = dup_name;
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/* open the file */
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ff = fopen (dup_name, "rb");
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if (ff)
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break;
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/* free (dup_name); */
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if (include->next == NULL)
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{
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if (line != NULL)
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error (line, "Problem opening file `%s'\n", file_name);
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perror (file_name);
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exit (1);
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}
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include = include->next;
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}
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/* determine the size */
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fseek (ff, 0, SEEK_END);
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file->size = ftell (ff);
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fseek (ff, 0, SEEK_SET);
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/* allocate this much memory */
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file->buffer = (char *) zalloc (file->size + 1);
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if (file->buffer == NULL)
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{
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perror (file_name);
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exit (1);
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}
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file->pos = file->buffer;
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/* read it all in */
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if (fread (file->buffer, 1, file->size, ff) < file->size)
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{
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perror (file_name);
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exit (1);
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}
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file->buffer[file->size] = '\0';
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/* set the initial line numbering */
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file->real_line.line_nr = 1; /* specifies current line */
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file->pseudo_line.line_nr = 1; /* specifies current line */
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/* done */
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fclose (ff);
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}
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table *
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table_open (const char *file_name)
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{
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table *root;
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/* create a file descriptor */
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root = ZALLOC (table);
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if (root == NULL)
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{
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perror (file_name);
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exit (1);
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}
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table_push (root, NULL, NULL, file_name);
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return root;
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}
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char *
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skip_spaces (char *chp)
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{
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while (1)
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{
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if (*chp == '\0' || *chp == '\n' || !isspace (*chp))
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return chp;
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chp++;
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}
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}
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char *
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back_spaces (char *start, char *chp)
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{
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while (1)
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{
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if (chp <= start || !isspace (chp[-1]))
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return chp;
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chp--;
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}
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}
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char *
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skip_digits (char *chp)
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{
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while (1)
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{
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if (*chp == '\0' || *chp == '\n' || !isdigit (*chp))
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return chp;
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chp++;
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}
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}
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char *
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skip_to_separator (char *chp, char *separators)
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{
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while (1)
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{
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char *sep = separators;
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while (1)
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{
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if (*chp == *sep)
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return chp;
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if (*sep == '\0')
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break;
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sep++;
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}
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chp++;
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}
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}
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static char *
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skip_to_null (char *chp)
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{
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return skip_to_separator (chp, "");
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}
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static char *
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skip_to_nl (char *chp)
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{
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return skip_to_separator (chp, "\n");
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}
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static void
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next_line (open_table * file)
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{
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file->pos = skip_to_nl (file->pos);
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if (*file->pos == '0')
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error (&file->pseudo_line, "Missing <nl> at end of line\n");
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*file->pos = '\0';
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file->pos += 1;
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file->real_line.line_nr += 1;
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file->pseudo_line.line_nr += 1;
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}
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extern table_entry *
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table_read (table *root)
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{
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open_table *file = root->current;
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table_entry *entry = NULL;
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while (1)
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{
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/* end-of-file? */
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while (*file->pos == '\0')
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{
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if (file->parent != NULL)
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{
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file = file->parent;
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root->current = file;
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}
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else
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return NULL;
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}
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/* code_block? */
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if (*file->pos == '{')
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{
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char *chp;
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next_line (file); /* discard leading brace */
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entry = new_table_entry (file, table_code_entry);
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chp = file->pos;
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/* determine how many lines are involved - look for <nl> "}" */
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{
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int nr_lines = 0;
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while (*file->pos != '}')
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{
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next_line (file);
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nr_lines++;
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}
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set_nr_table_entry_fields (entry, nr_lines);
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}
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/* now enter each line */
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{
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int line_nr;
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for (line_nr = 0; line_nr < entry->nr_fields; line_nr++)
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{
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if (strncmp (chp, " ", 2) == 0)
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entry->field[line_nr] = chp + 2;
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else
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entry->field[line_nr] = chp;
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chp = skip_to_null (chp) + 1;
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}
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/* skip trailing brace */
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ASSERT (*file->pos == '}');
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next_line (file);
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}
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break;
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}
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/* tab block? */
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if (*file->pos == '\t')
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{
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char *chp = file->pos;
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entry = new_table_entry (file, table_code_entry);
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/* determine how many lines are involved - look for <nl> !<tab> */
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{
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int nr_lines = 0;
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int nr_blank_lines = 0;
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while (1)
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{
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if (*file->pos == '\t')
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{
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nr_lines = nr_lines + nr_blank_lines + 1;
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nr_blank_lines = 0;
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next_line (file);
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}
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else
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{
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file->pos = skip_spaces (file->pos);
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if (*file->pos != '\n')
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break;
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nr_blank_lines++;
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next_line (file);
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}
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}
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set_nr_table_entry_fields (entry, nr_lines);
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}
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/* now enter each line */
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{
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int line_nr;
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for (line_nr = 0; line_nr < entry->nr_fields; line_nr++)
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{
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if (*chp == '\t')
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entry->field[line_nr] = chp + 1;
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else
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entry->field[line_nr] = ""; /* blank */
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chp = skip_to_null (chp) + 1;
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}
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}
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break;
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}
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/* cpp directive? */
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if (file->pos[0] == '#')
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{
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char *chp = skip_spaces (file->pos + 1);
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/* cpp line-nr directive - # <line-nr> "<file>" */
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if (isdigit (*chp)
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&& *skip_digits (chp) == ' '
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&& *skip_spaces (skip_digits (chp)) == '"')
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{
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int line_nr;
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char *file_name;
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file->pos = chp;
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/* parse the number */
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line_nr = atoi (file->pos) - 1;
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/* skip to the file name */
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while (file->pos[0] != '0'
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&& file->pos[0] != '"' && file->pos[0] != '\0')
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file->pos++;
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if (file->pos[0] != '"')
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error (&file->real_line,
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"Missing opening quote in cpp directive\n");
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/* parse the file name */
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file->pos++;
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file_name = file->pos;
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while (file->pos[0] != '"' && file->pos[0] != '\0')
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file->pos++;
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if (file->pos[0] != '"')
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error (&file->real_line,
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"Missing closing quote in cpp directive\n");
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file->pos[0] = '\0';
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file->pos++;
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file->pos = skip_to_nl (file->pos);
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if (file->pos[0] != '\n')
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error (&file->real_line,
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"Missing newline in cpp directive\n");
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file->pseudo_line.file_name = file_name;
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file->pseudo_line.line_nr = line_nr;
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next_line (file);
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continue;
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}
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/* #define and #undef - not implemented yet */
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/* Old style # comment */
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next_line (file);
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continue;
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}
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/* blank line or end-of-file? */
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file->pos = skip_spaces (file->pos);
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if (*file->pos == '\0')
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error (&file->pseudo_line, "Missing <nl> at end of file\n");
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if (*file->pos == '\n')
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{
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next_line (file);
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continue;
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}
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/* comment - leading // or # - skip */
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if ((file->pos[0] == '/' && file->pos[1] == '/')
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|| (file->pos[0] == '#'))
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{
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next_line (file);
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continue;
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}
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/* colon field */
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{
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char *chp = file->pos;
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entry = new_table_entry (file, table_colon_entry);
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next_line (file);
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/* figure out how many fields */
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{
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int nr_fields = 1;
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char *tmpch = chp;
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while (1)
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{
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tmpch = skip_to_separator (tmpch, "\\:");
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if (*tmpch == '\\')
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{
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/* eat the escaped character */
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char *cp = tmpch;
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while (cp[1] != '\0')
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{
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cp[0] = cp[1];
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cp++;
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}
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cp[0] = '\0';
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tmpch++;
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}
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else if (*tmpch != ':')
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break;
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else
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{
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*tmpch = '\0';
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tmpch++;
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nr_fields++;
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}
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}
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set_nr_table_entry_fields (entry, nr_fields);
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}
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/* now parse them */
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{
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int field_nr;
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for (field_nr = 0; field_nr < entry->nr_fields; field_nr++)
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{
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chp = skip_spaces (chp);
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entry->field[field_nr] = chp;
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chp = skip_to_null (chp);
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*back_spaces (entry->field[field_nr], chp) = '\0';
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chp++;
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}
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}
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break;
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}
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}
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ASSERT (entry == NULL || entry->field[entry->nr_fields] == NULL);
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return entry;
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}
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extern void
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table_print_code (lf *file, table_entry *entry)
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{
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int field_nr;
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int nr = 0;
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for (field_nr = 0; field_nr < entry->nr_fields; field_nr++)
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{
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char *chp = entry->field[field_nr];
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int in_bit_field = 0;
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if (*chp == '#')
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lf_indent_suppress (file);
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while (*chp != '\0')
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{
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if (chp[0] == '{' && !isspace (chp[1]) && chp[1] != '\0')
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{
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in_bit_field = 1;
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nr += lf_putchr (file, '_');
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}
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else if (in_bit_field && chp[0] == ':')
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{
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nr += lf_putchr (file, '_');
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}
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else if (in_bit_field && *chp == '}')
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{
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nr += lf_putchr (file, '_');
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in_bit_field = 0;
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}
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else
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{
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nr += lf_putchr (file, *chp);
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}
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chp++;
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}
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if (in_bit_field)
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{
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line_ref line = *entry->line;
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line.line_nr += field_nr;
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error (&line, "Bit field brace miss match\n");
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}
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nr += lf_putchr (file, '\n');
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}
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}
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void
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dump_line_ref (lf *file, char *prefix, const line_ref *line, char *suffix)
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{
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lf_printf (file, "%s(line_ref*) 0x%lx", prefix, (long) line);
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if (line != NULL)
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{
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lf_indent (file, +1);
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lf_printf (file, "\n(line_nr %d)", line->line_nr);
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lf_printf (file, "\n(file_name %s)", line->file_name);
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lf_indent (file, -1);
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}
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lf_printf (file, "%s", suffix);
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}
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static const char *
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table_entry_type_to_str (table_entry_type type)
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{
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switch (type)
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{
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case table_code_entry:
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return "code-entry";
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case table_colon_entry:
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return "colon-entry";
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}
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return "*invalid*";
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}
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void
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dump_table_entry (lf *file,
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char *prefix, const table_entry *entry, char *suffix)
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{
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lf_printf (file, "%s(table_entry*) 0x%lx", prefix, (long) entry);
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if (entry != NULL)
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{
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int field;
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lf_indent (file, +1);
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dump_line_ref (file, "\n(line ", entry->line, ")");
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lf_printf (file, "\n(type %s)", table_entry_type_to_str (entry->type));
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lf_printf (file, "\n(nr_fields %d)", entry->nr_fields);
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lf_printf (file, "\n(fields");
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lf_indent (file, +1);
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for (field = 0; field < entry->nr_fields; field++)
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lf_printf (file, "\n\"%s\"", entry->field[field]);
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lf_indent (file, -1);
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lf_printf (file, ")");
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lf_indent (file, -1);
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}
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lf_printf (file, "%s", suffix);
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}
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#ifdef MAIN
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int
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main (int argc, char **argv)
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{
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table *t;
|
|
table_entry *entry;
|
|
lf *l;
|
|
int line_nr;
|
|
|
|
if (argc != 2)
|
|
{
|
|
printf ("Usage: table <file>\n");
|
|
exit (1);
|
|
}
|
|
|
|
t = table_open (argv[1]);
|
|
l = lf_open ("-", "stdout", lf_omit_references, lf_is_text, "tmp-table");
|
|
|
|
line_nr = 0;
|
|
do
|
|
{
|
|
char line[10];
|
|
entry = table_read (t);
|
|
line_nr++;
|
|
sprintf (line, "(%d ", line_nr);
|
|
dump_table_entry (l, line, entry, ")\n");
|
|
}
|
|
while (entry != NULL);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|