return __cfg_next_prefix_file(name, strlen(name) + 1, 0);
}
+static int
+__qemu_cfg_set_file(u32 select)
+{
+ if (!qemu_cfg_present || !select)
+ return -1;
+ if (select == ntohs(LastFile.select))
+ return 0;
+
+ u32 count;
+ qemu_cfg_read_entry(&count, QEMU_CFG_FILE_DIR, sizeof(count));
+ count = ntohl(count);
+ u32 e;
+ for (e = 0; e < count; e++) {
+ qemu_cfg_read((void*)&LastFile, sizeof(LastFile));
+ if (select == ntohs(LastFile.select))
+ return 0;
+ }
+ return -1;
+}
+
int qemu_cfg_size_file(u32 select)
{
- if (select != ntohs(LastFile.select))
+ if (__qemu_cfg_set_file(select))
return -1;
return ntohl(LastFile.size);
}
-
const char* qemu_cfg_name_file(u32 select)
{
- if (select != ntohs(LastFile.select))
+ if (__qemu_cfg_set_file(select))
return NULL;
return LastFile.name;
}
int qemu_cfg_read_file(u32 select, void *dst, u32 maxlen)
{
- if (!qemu_cfg_present)
- return -1;
- if (!select || select != ntohs(LastFile.select))
+ if (__qemu_cfg_set_file(select))
return -1;
int len = qemu_cfg_size_file(select);
if (len < 0 || len > maxlen)
data[filesize] = '\0';
return data;
}
+
+// Attempt to load an integer from the given file - return 'defval'
+// if unsuccesful.
+u64
+romfile_loadint(const char *name, u64 defval)
+{
+ u32 file = romfile_find(name);
+ if (!file)
+ return defval;
+
+ int filesize = romfile_size(file);
+ if (!filesize || filesize > sizeof(u64) || (filesize & (filesize-1)))
+ // Doesn't look like a valid integer.
+ return defval;
+
+ u64 val = 0;
+ romfile_copy(file, &val, sizeof(val));
+ return val;
+}