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