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David Gibson 2005-06-08 17:18:34 +10:00
commit fc14dad769
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/*
* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
*
*
* 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 "dtc.h"
struct node *device_tree;
extern FILE *yyin;
extern int yyparse(void);
struct node *dt_from_source(FILE *f)
{
yyin = f;
if (yyparse() != 0)
return NULL;
fill_fullpaths(device_tree, "");
return device_tree;
}
static void write_prefix(FILE *f, int level)
{
int i;
for (i = 0; i < level; i++)
fputc('\t', f);
}
enum proptype {
PROP_EMPTY,
PROP_STRING,
PROP_CELLS,
PROP_BYTES,
};
static enum proptype guess_type(struct property *prop)
{
int len = prop->val.len;
char *p = prop->val.val;
int nnoprint = 0;
int i;
if (len == 0)
return PROP_EMPTY;
for (i = 0; i < len; i++) {
if (! isprint(p[i]))
nnoprint++;
}
if ((nnoprint == 1) && (p[len-1] == '\0'))
return PROP_STRING;
else if ((len % sizeof(cell_t)) == 0)
return PROP_CELLS;
else
return PROP_BYTES;
}
void write_tree_source(FILE *f, struct node *tree, int level)
{
struct property *prop;
struct node *child;
write_prefix(f, level);
if (tree->name && (*tree->name))
fprintf(f, "%s {\n", tree->name);
else
fprintf(f, "/ {\n");
for_each_property(tree, prop) {
cell_t *cp;
char *bp;
void *propend;
enum proptype type;
write_prefix(f, level);
fprintf(f, "\t%s", prop->name);
type = guess_type(prop);
propend = prop->val.val + prop->val.len;
switch (type) {
case PROP_EMPTY:
fprintf(f, ";\n");
break;
case PROP_STRING:
fprintf(f, " = \"%s\";\n", (char *)prop->val.val);
break;
case PROP_CELLS:
fprintf(f, " = <");
cp = (cell_t *)prop->val.val;
for (;;) {
fprintf(f, "%x", be32_to_cpu(*cp++));
if ((void *)cp >= propend)
break;
fprintf(f, " ");
}
fprintf(f, ">;\n");
break;
case PROP_BYTES:
fprintf(f, " = [");
bp = prop->val.val;
for (;;) {
fprintf(f, "%02hhx", *bp++);
if ((void *)bp >= propend)
break;
fprintf(f, " ");
}
fprintf(f, "];\n");
break;
}
}
for_each_child(tree, child) {
fprintf(f, "\n");
write_tree_source(f, child, level+1);
}
write_prefix(f, level);
fprintf(f, "};\n");
}