| // Access to pseudo "file" interface for configuration information. |
| // |
| // Copyright (C) 2012 Kevin O'Connor <kevin@koconnor.net> |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "config.h" // CONFIG_* |
| #include "util.h" // dprintf |
| |
| static struct romfile_s *RomfileRoot; |
| |
| void |
| romfile_add(struct romfile_s *file) |
| { |
| dprintf(3, "Add romfile: %s (size=%d)\n", file->name, file->size); |
| file->next = RomfileRoot; |
| RomfileRoot = file; |
| } |
| |
| // Search for the specified file. |
| static struct romfile_s * |
| __romfile_findprefix(const char *prefix, int prefixlen, struct romfile_s *prev) |
| { |
| struct romfile_s *cur = RomfileRoot; |
| if (prev) |
| cur = prev->next; |
| while (cur) { |
| if (memcmp(prefix, cur->name, prefixlen) == 0) |
| return cur; |
| cur = cur->next; |
| } |
| return NULL; |
| } |
| |
| struct romfile_s * |
| romfile_findprefix(const char *prefix, struct romfile_s *prev) |
| { |
| return __romfile_findprefix(prefix, strlen(prefix), prev); |
| } |
| |
| struct romfile_s * |
| romfile_find(const char *name) |
| { |
| return __romfile_findprefix(name, strlen(name) + 1, NULL); |
| } |
| |
| // Helper function to find, malloc_tmphigh, and copy a romfile. This |
| // function adds a trailing zero to the malloc'd copy. |
| void * |
| romfile_loadfile(const char *name, int *psize) |
| { |
| struct romfile_s *file = romfile_find(name); |
| if (!file) |
| return NULL; |
| |
| int filesize = file->size; |
| if (!filesize) |
| return NULL; |
| |
| char *data = malloc_tmphigh(filesize+1); |
| if (!data) { |
| warn_noalloc(); |
| return NULL; |
| } |
| |
| dprintf(5, "Copying romfile '%s' (len %d)\n", name, filesize); |
| int ret = file->copy(file, data, filesize); |
| if (ret < 0) { |
| free(data); |
| return NULL; |
| } |
| if (psize) |
| *psize = filesize; |
| 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) |
| { |
| struct romfile_s *file = romfile_find(name); |
| if (!file) |
| return defval; |
| |
| int filesize = file->size; |
| if (!filesize || filesize > sizeof(u64) || (filesize & (filesize-1))) |
| // Doesn't look like a valid integer. |
| return defval; |
| |
| u64 val = 0; |
| int ret = file->copy(file, &val, sizeof(val)); |
| if (ret < 0) |
| return defval; |
| return val; |
| } |