/* * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc. * * 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 */ #define _GNU_SOURCE #include <stdio.h> #include "dtc.h"#include "srcpos.h" /* A node in our list of directories to search for source/include files */struct search_path {	struct search_path *next;	/* next node in list, NULL for end */	const char *dirname;		/* name of directory to search */}; /* This is the list of directories that we search for source files */static struct search_path *search_path_head, **search_path_tail;  static char *get_dirname(const char *path){	const char *slash = strrchr(path, '/'); 	if (slash) {		int len = slash - path;		char *dir = xmalloc(len + 1); 		memcpy(dir, path, len);		dir[len] = '\0';		return dir;	}	return NULL;} FILE *depfile; /* = NULL */struct srcfile_state *current_srcfile; /* = NULL */ /* Detect infinite include recursion. */#define MAX_SRCFILE_DEPTH     (100)static int srcfile_depth; /* = 0 */  /** * Try to open a file in a given directory. * * If the filename is an absolute path, then dirname is ignored. If it is a * relative path, then we look in that directory for the file. * * @param dirname	Directory to look in, or NULL for none * @param fname		Filename to look for * @param fp		Set to NULL if file did not open * @return allocated filename on success (caller must free), NULL on failure */static char *try_open(const char *dirname, const char *fname, FILE **fp){	char *fullname; 	if (!dirname || fname[0] == '/')		fullname = xstrdup(fname);	else		fullname = join_path(dirname, fname); 	*fp = fopen(fullname, "rb");	if (!*fp) {		free(fullname);		fullname = NULL;	} 	return fullname;} /** * Open a file for read access * * If it is a relative filename, we search the full search path for it. * * @param fname	Filename to open * @param fp	Returns pointer to opened FILE, or NULL on failure * @return pointer to allocated filename, which caller must free */static char *fopen_any_on_path(const char *fname, FILE **fp){	const char *cur_dir = NULL;	struct search_path *node;	char *fullname; 	/* Try current directory first */	assert(fp);	if (current_srcfile)		cur_dir = current_srcfile->dir;	fullname = try_open(cur_dir, fname, fp); 	/* Failing that, try each search path in turn */	for (node = search_path_head; !*fp && node; node = node->next)		fullname = try_open(node->dirname, fname, fp); 	return fullname;} FILE *srcfile_relative_open(const char *fname, char **fullnamep){	FILE *f;	char *fullname; 	if (streq(fname, "-")) {		f = stdin;		fullname = xstrdup("<stdin>");	} else {		fullname = fopen_any_on_path(fname, &f);		if (!f)			die("Couldn't open \"%s\": %s\n", fname,			    strerror(errno));	} 	if (depfile)		fprintf(depfile, " %s", fullname); 	if (fullnamep)		*fullnamep = fullname;	else		free(fullname); 	return f;} void srcfile_push(const char *fname){	struct srcfile_state *srcfile; 	if (srcfile_depth++ >= MAX_SRCFILE_DEPTH)		die("Includes nested too deeply"); 	srcfile = xmalloc(sizeof(*srcfile)); 	srcfile->f = srcfile_relative_open(fname, &srcfile->name);	srcfile->dir = get_dirname(srcfile->name);	srcfile->prev = current_srcfile; 	srcfile->lineno = 1;	srcfile->colno = 1; 	current_srcfile = srcfile;} bool srcfile_pop(void){	struct srcfile_state *srcfile = current_srcfile; 	assert(srcfile); 	current_srcfile = srcfile->prev; 	if (fclose(srcfile->f))		die("Error closing \"%s\": %s\n", srcfile->name,		    strerror(errno)); 	/* FIXME: We allow the srcfile_state structure to leak,	 * because it could still be referenced from a location	 * variable being carried through the parser somewhere.  To	 * fix this we could either allocate all the files from a	 * table, or use a pool allocator. */ 	return current_srcfile ? true : false;} void srcfile_add_search_path(const char *dirname){	struct search_path *node; 	/* Create the node */	node = xmalloc(sizeof(*node));	node->next = NULL;	node->dirname = xstrdup(dirname); 	/* Add to the end of our list */	if (search_path_tail)		*search_path_tail = node;	else		search_path_head = node;	search_path_tail = &node->next;} /* * The empty source position. */ struct srcpos srcpos_empty = {	.first_line = 0,	.first_column = 0,	.last_line = 0,	.last_column = 0,	.file = NULL,}; #define TAB_SIZE      8 void srcpos_update(struct srcpos *pos, const char *text, int len){	int i; 	pos->file = current_srcfile; 	pos->first_line = current_srcfile->lineno;	pos->first_column = current_srcfile->colno; 	for (i = 0; i < len; i++)		if (text[i] == '\n') {			current_srcfile->lineno++;			current_srcfile->colno = 1;		} else if (text[i] == '\t') {			current_srcfile->colno =				ALIGN(current_srcfile->colno, TAB_SIZE);		} else {			current_srcfile->colno++;		} 	pos->last_line = current_srcfile->lineno;	pos->last_column = current_srcfile->colno;} struct srcpos *srcpos_copy(struct srcpos *pos){	struct srcpos *pos_new; 	pos_new = xmalloc(sizeof(struct srcpos));	memcpy(pos_new, pos, sizeof(struct srcpos)); 	return pos_new;}   voidsrcpos_dump(struct srcpos *pos){	printf("file        : \"%s\"\n",	       pos->file ? (char *) pos->file : "<no file>");	printf("first_line  : %d\n", pos->first_line);	printf("first_column: %d\n", pos->first_column);	printf("last_line   : %d\n", pos->last_line);	printf("last_column : %d\n", pos->last_column);	printf("file        : %s\n", pos->file->name);}  char *srcpos_string(struct srcpos *pos){	const char *fname = "<no-file>";	char *pos_str;	int rc; 	if (pos)		fname = pos->file->name;  	if (pos->first_line != pos->last_line)		rc = asprintf(&pos_str, "%s:%d.%d-%d.%d", fname,			      pos->first_line, pos->first_column,			      pos->last_line, pos->last_column);	else if (pos->first_column != pos->last_column)		rc = asprintf(&pos_str, "%s:%d.%d-%d", fname,			      pos->first_line, pos->first_column,			      pos->last_column);	else		rc = asprintf(&pos_str, "%s:%d.%d", fname,			      pos->first_line, pos->first_column); 	if (rc == -1)		die("Couldn't allocate in srcpos string"); 	return pos_str;} void srcpos_verror(struct srcpos *pos, const char *prefix,		   const char *fmt, va_list va){	char *srcstr; 	srcstr = srcpos_string(pos); 	fprintf(stderr, "%s: %s ", prefix, srcstr);	vfprintf(stderr, fmt, va);	fprintf(stderr, "\n"); 	free(srcstr);} void srcpos_error(struct srcpos *pos, const char *prefix,		  const char *fmt, ...){	va_list va; 	va_start(va, fmt);	srcpos_verror(pos, prefix, fmt, va);	va_end(va);} void srcpos_set_line(char *f, int l){	current_srcfile->name = f;	current_srcfile->lineno = l;}