git.mutantstargoat.com Git - andemo/blob - src/android/assfile.c

   1 #include <assert.h>
   2 #include <fcntl.h>
   3 #include <android/asset_manager.h>
   4 #include "assfile.h"
   5 #include "android_native_app_glue.h"
   6
   7 struct android_app *app;        /* defined in android/amain.c */
   8
   9 static int putback_buf = -1;
  10
  11 ass_file *ass_fopen(const char *fname, const char *mode)
  12 {
  13         AAsset *ass;
  14         unsigned int flags = 0;
  15         char prev = 0;
  16
  17         while(*mode) {
  18                 switch(*mode) {
  19                 case 'r':
  20                         flags |= O_RDONLY;
  21                         break;
  22
  23                 case 'w':
  24                         flags |= O_WRONLY;
  25                         break;
  26
  27                 case 'a':
  28                         flags |= O_APPEND;
  29                         break;
  30
  31                 case '+':
  32                         if(prev == 'w' || prev == 'a') {
  33                                 flags |= O_CREAT;
  34                         }
  35                         break;
  36
  37                 default:
  38                         break;
  39                 }
  40                 prev = *mode++;
  41         }
  42
  43         assert(app);
  44         assert(app->activity);
  45         assert(app->activity->assetManager);
  46         if(!(ass = AAssetManager_open(app->activity->assetManager, fname, flags))) {
  47                 return 0;
  48         }
  49         return (ass_file*)ass;
  50 }
  51
  52 void ass_fclose(ass_file *fp)
  53 {
  54         AAsset_close((AAsset*)fp);
  55 }
  56
  57 long ass_fseek(ass_file *fp, long offs, int whence)
  58 {
  59         return AAsset_seek((AAsset*)fp, offs, whence);
  60 }
  61
  62 long ass_ftell(ass_file *fp)
  63 {
  64         return AAsset_seek((AAsset*)fp, 0, SEEK_CUR);
  65 }
  66
  67 int ass_feof(ass_file *fp)
  68 {
  69         return AAsset_getRemainingLength((AAsset*)fp) == 0 ? 1 : 0;
  70 }
  71
  72 size_t ass_fread(void *buf, size_t size, size_t count, ass_file *fp)
  73 {
  74         size_t nbytes = size * count;
  75         size_t rdbytes = 0;
  76
  77         if(putback_buf >= 0) {
  78                 *(unsigned char*)buf = (unsigned char)putback_buf;
  79                 putback_buf = -1;
  80                 --nbytes;
  81                 ++rdbytes;
  82                 buf = (unsigned char*)buf + 1;
  83         }
  84
  85         return (rdbytes + AAsset_read((AAsset*)fp, buf, nbytes)) / size;
  86 }
  87
  88 int ass_ungetc(int c, ass_file *fp)
  89 {
  90         putback_buf = c;
  91         return 0;
  92 }