Release 4.15 scripts/dtc/srcpos.c

/*
 * 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;
}

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John Bonesio
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98.57%
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Rob Herring
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100.00%


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;
}

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Stephen Warren
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65.88%
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David Gibson
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27.06%
2
40.00%
John Bonesio
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5.88%
1
20.00%
Rob Herring
1
1.18%
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/**
 * 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;
}

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Stephen Warren
74
77.89%
1
25.00%
John Bonesio
13
13.68%
1
25.00%
David Gibson
8
8.42%
2
50.00%
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95
100.00%
4
100.00%



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;
}

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Stephen Warren
63
58.88%
2
40.00%
John Bonesio
24
22.43%
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20.00%
David Gibson
20
18.69%
2
40.00%
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107
100.00%
5
100.00%



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;
}

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John Bonesio
47
55.29%
1
25.00%
David Gibson
37
43.53%
2
50.00%
Rob Herring
1
1.18%
1
25.00%
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85
100.00%
4
100.00%



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;
}

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John Bonesio
45
80.36%
1
25.00%
David Gibson
8
14.29%
2
50.00%
Rob Herring
3
5.36%
1
25.00%
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56
100.00%
4
100.00%



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;
}

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Stephen Warren
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/*
 * 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;
}

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John Bonesio
106
83.46%
1
33.33%
David Gibson
21
16.54%
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66.67%
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100.00%


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;
}

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John Bonesio
38
86.36%
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David Gibson
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13.64%
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100.00%


char *

srcpos_string(struct srcpos *pos)
{
	const char *fname = "<no-file>";
	char *pos_str;

	if (pos->file && pos->file->name)
		fname = pos->file->name;


	if (pos->first_line != pos->last_line)
		xasprintf(&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)
		xasprintf(&pos_str, "%s:%d.%d-%d", fname,
			  pos->first_line, pos->first_column,
			  pos->last_column);
	else
		xasprintf(&pos_str, "%s:%d.%d", fname,
			  pos->first_line, pos->first_column);

	return pos_str;
}

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John Bonesio
100
75.19%
1
20.00%
David Gibson
22
16.54%
2
40.00%
Rob Herring
11
8.27%
2
40.00%
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133
100.00%
5
100.00%



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);
}

Contributors
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Tokens
Prop
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CommitProp
John Bonesio
48
72.73%
1
25.00%
Rob Herring
11
16.67%
1
25.00%
David Gibson
4
6.06%
1
25.00%
Grant C. Likely
3
4.55%
1
25.00%
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66
100.00%
4
100.00%



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);
}

Contributors
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CommitProp
John Bonesio
34
70.83%
1
25.00%
Rob Herring
8
16.67%
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25.00%
David Gibson
6
12.50%
2
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void srcpos_set_line(char *f, int l)
{
	current_srcfile->name = f;
	current_srcfile->lineno = l;
}
Contributors
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Stephen Warren
24
100.00%
1
100.00%
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24
100.00%
1
100.00%

Overall Contributors
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Tokens
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CommitProp
John Bonesio
581
52.58%
1
11.11%
Stephen Warren
317
28.69%
2
22.22%
David Gibson
168
15.20%
2
22.22%
Rob Herring
36
3.26%
3
33.33%
Grant C. Likely
3
0.27%
1
11.11%
Total
1105
100.00%
9
100.00%
Directory: scripts/dtc

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