/* * 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"  static char *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 */ FILE *srcfile_relative_open(const char *fname, char **fullnamep){	FILE *f;	char *fullname; 	if (streq(fname, "-")) {		f = stdin;		fullname = xstrdup("<stdin>");	} else {		if (!current_srcfile || !current_srcfile->dir		    || (fname[0] == '/'))			fullname = xstrdup(fname);		else			fullname = join_path(current_srcfile->dir, fname); 		f = fopen(fullname, "r");		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 = dirname(srcfile->name);	srcfile->prev = current_srcfile; 	srcfile->lineno = 1;	srcfile->colno = 1; 	current_srcfile = srcfile;} int 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 ? 1 : 0;} /* * 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;} voidsrcpos_verror(struct srcpos *pos, char const *fmt, va_list va){       const char *srcstr;        srcstr = srcpos_string(pos);        fprintf(stdout, "Error: %s ", srcstr);       vfprintf(stdout, fmt, va);       fprintf(stdout, "\n");} voidsrcpos_error(struct srcpos *pos, char const *fmt, ...){	va_list va; 	va_start(va, fmt);	srcpos_verror(pos, fmt, va);	va_end(va);}  voidsrcpos_warn(struct srcpos *pos, char const *fmt, ...){	const char *srcstr;	va_list va;	va_start(va, fmt); 	srcstr = srcpos_string(pos); 	fprintf(stderr, "Warning: %s ", srcstr);	vfprintf(stderr, fmt, va);	fprintf(stderr, "\n"); 	va_end(va);}