eqemu

annotate libs/libimago/src/ftype_module.c @ 10:819c7ebb1bec

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added libimago to avoid the external dependency
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 18 Jul 2014 05:07:40 +0300
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nuclear@10 1 /*
nuclear@10 2 libimago - a multi-format image file input/output library.
nuclear@10 3 Copyright (C) 2010 John Tsiombikas <nuclear@member.fsf.org>
nuclear@10 4
nuclear@10 5 This program is free software: you can redistribute it and/or modify
nuclear@10 6 it under the terms of the GNU Lesser General Public License as published
nuclear@10 7 by the Free Software Foundation, either version 3 of the License, or
nuclear@10 8 (at your option) any later version.
nuclear@10 9
nuclear@10 10 This program is distributed in the hope that it will be useful,
nuclear@10 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@10 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@10 13 GNU Lesser General Public License for more details.
nuclear@10 14
nuclear@10 15 You should have received a copy of the GNU Lesser General Public License
nuclear@10 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@10 17 */
nuclear@10 18
nuclear@10 19 #include <stdlib.h>
nuclear@10 20 #include <string.h>
nuclear@10 21 #include "ftype_module.h"
nuclear@10 22
nuclear@10 23 static struct list_node {
nuclear@10 24 struct ftype_module *module;
nuclear@10 25 struct list_node *next;
nuclear@10 26 } *modules;
nuclear@10 27
nuclear@10 28 /* defined in modules.c which is generated by configure */
nuclear@10 29 void img_modules_init();
nuclear@10 30
nuclear@10 31 static int done_init;
nuclear@10 32
nuclear@10 33 int img_register_module(struct ftype_module *mod)
nuclear@10 34 {
nuclear@10 35 struct list_node *node;
nuclear@10 36
nuclear@10 37 if(!(node = malloc(sizeof *node))) {
nuclear@10 38 return -1;
nuclear@10 39 }
nuclear@10 40
nuclear@10 41 node->module = mod;
nuclear@10 42 node->next = modules;
nuclear@10 43 modules = node;
nuclear@10 44 return 0;
nuclear@10 45 }
nuclear@10 46
nuclear@10 47 struct ftype_module *img_find_format_module(struct img_io *io)
nuclear@10 48 {
nuclear@10 49 struct list_node *node;
nuclear@10 50
nuclear@10 51 if(!done_init) {
nuclear@10 52 img_modules_init();
nuclear@10 53 done_init = 1;
nuclear@10 54 }
nuclear@10 55
nuclear@10 56 node = modules;
nuclear@10 57 while(node) {
nuclear@10 58 if(node->module->check(io) != -1) {
nuclear@10 59 return node->module;
nuclear@10 60 }
nuclear@10 61 node = node->next;
nuclear@10 62 }
nuclear@10 63 return 0;
nuclear@10 64 }
nuclear@10 65
nuclear@10 66 struct ftype_module *img_guess_format(const char *fname)
nuclear@10 67 {
nuclear@10 68 struct list_node *node;
nuclear@10 69 char *suffix;
nuclear@10 70 int suffix_len;
nuclear@10 71
nuclear@10 72 if(!done_init) {
nuclear@10 73 img_modules_init();
nuclear@10 74 done_init = 1;
nuclear@10 75 }
nuclear@10 76
nuclear@10 77 if(!(suffix = strrchr(fname, '.'))) {
nuclear@10 78 return 0; /* no suffix, can't guess ... */
nuclear@10 79 }
nuclear@10 80 suffix_len = (int)strlen(suffix);
nuclear@10 81
nuclear@10 82 node = modules;
nuclear@10 83 while(node) {
nuclear@10 84 char *suflist = node->module->suffix;
nuclear@10 85 char *start, *end;
nuclear@10 86
nuclear@10 87 while(*suflist) {
nuclear@10 88 if(!(start = strstr(suflist, suffix))) {
nuclear@10 89 break;
nuclear@10 90 }
nuclear@10 91 end = start + suffix_len;
nuclear@10 92
nuclear@10 93 if(*end == ':' || *end == 0) {
nuclear@10 94 return node->module; /* found it */
nuclear@10 95 }
nuclear@10 96 suflist = end;
nuclear@10 97 }
nuclear@10 98
nuclear@10 99 node = node->next;
nuclear@10 100 }
nuclear@10 101 return 0;
nuclear@10 102 }
nuclear@10 103
nuclear@10 104 struct ftype_module *img_get_module(int idx)
nuclear@10 105 {
nuclear@10 106 struct list_node *node;
nuclear@10 107
nuclear@10 108 if(!done_init) {
nuclear@10 109 img_modules_init();
nuclear@10 110 done_init = 1;
nuclear@10 111 }
nuclear@10 112
nuclear@10 113 node = modules;
nuclear@10 114 while(node && idx--) {
nuclear@10 115 node = node->next;
nuclear@10 116 }
nuclear@10 117 return node->module;
nuclear@10 118 }