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#include <common.h>
#include <malloc.h>
#include <fs.h>
#include <file-list.h>
#include <linux/err.h>
#define PARSE_DEVICE 0
#define PARSE_NAME 1
#define PARSE_FLAGS 2
static int file_list_parse_one(struct file_list *files, const char *partstr, const char **endstr)
{
int i = 0, state = PARSE_DEVICE;
char filename[PATH_MAX];
char name[PATH_MAX];
struct file_list_entry *entry = xzalloc(sizeof(*entry));
memset(filename, 0, sizeof(filename));
memset(name, 0, sizeof(name));
while (*partstr && *partstr != ',') {
switch (state) {
case PARSE_DEVICE:
if (*partstr == '(') {
state = PARSE_NAME;
i = 0;
} else {
filename[i++] = *partstr;
}
break;
case PARSE_NAME:
if (*partstr == ')') {
state = PARSE_FLAGS;
i = 0;
} else {
name[i++] = *partstr;
}
break;
case PARSE_FLAGS:
switch (*partstr) {
case 's':
entry->flags |= FILE_LIST_FLAG_SAFE;
break;
case 'r':
entry->flags |= FILE_LIST_FLAG_READBACK;
break;
case 'c':
entry->flags |= FILE_LIST_FLAG_CREATE;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
partstr++;
}
if (state != PARSE_FLAGS)
return -EINVAL;
entry->name = xstrdup(name);
entry->filename = xstrdup(filename);
if (*partstr == ',')
partstr++;
*endstr = partstr;
list_add_tail(&entry->list, &files->list);
return 0;
}
struct file_list *file_list_parse(const char *str)
{
struct file_list *files;
int ret;
const char *endptr;
files = xzalloc(sizeof(*files));
INIT_LIST_HEAD(&files->list);
while (*str) {
if (file_list_parse_one(files, str, &endptr)) {
printf("parse error\n");
ret = -EINVAL;
goto out;
}
str = endptr;
files->num_entries++;
}
return files;
out:
free(files);
return ERR_PTR(ret);
}
void file_list_free(struct file_list *files)
{
struct file_list_entry *entry, *tmp;
list_for_each_entry_safe(entry, tmp, &files->list, list) {
free(entry->name);
free(entry->filename);
free(entry);
}
free(files);
}
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