kfile_posix.c

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00001 
00039 #include <emul/kfile_posix.h>
00040 #include <string.h>
00041 
00042 static size_t kfile_posix_read(struct KFile *_fd, void *buf, size_t size)
00043 {
00044     KFilePosix *fd = KFILEPOSIX_CAST(_fd);
00045     return fread(buf, sizeof(uint8_t), size, fd->fp);
00046 }
00047 
00048 static size_t kfile_posix_write(struct KFile *_fd, const void *buf, size_t size)
00049 {
00050     KFilePosix *fd = KFILEPOSIX_CAST(_fd);
00051     return fwrite(buf, sizeof(uint8_t), size, fd->fp);
00052 }
00053 
00054 static kfile_off_t kfile_posix_seek(struct KFile *_fd, kfile_off_t offset, KSeekMode whence)
00055 {
00056     KFilePosix *fd = KFILEPOSIX_CAST(_fd);
00057     int std_whence;
00058     switch (whence)
00059     {
00060         case KSM_SEEK_CUR:
00061             std_whence = SEEK_CUR;
00062             break;
00063         case KSM_SEEK_END:
00064             std_whence = SEEK_END;
00065             break;
00066         case KSM_SEEK_SET:
00067             std_whence = SEEK_SET;
00068             break;
00069         default:
00070             ASSERT(0);
00071             return EOF;
00072     }
00073     int err = fseek(fd->fp, offset, std_whence);
00074     if (err)
00075         return err;
00076 
00077     return ftell(fd->fp);
00078 }
00079 
00080 static int kfile_posix_close(struct KFile *_fd)
00081 {
00082     KFilePosix *fd = KFILEPOSIX_CAST(_fd);
00083     return fclose(fd->fp);
00084 }
00085 
00086 static int kfile_posix_flush(struct KFile *_fd)
00087 {
00088     KFilePosix *fd = KFILEPOSIX_CAST(_fd);
00089     return fflush(fd->fp);
00090 }
00091 
00092 FILE *kfile_posix_init(KFilePosix *file, const char *filename, const char *mode)
00093 {
00094     memset(file, 0, sizeof(*file));
00095     DB(file->fd._type = KFT_KFILEPOSIX);
00096     file->fd.read = kfile_posix_read;
00097     file->fd.write = kfile_posix_write;
00098     file->fd.close = kfile_posix_close;
00099     file->fd.seek = kfile_posix_seek;
00100     file->fd.flush = kfile_posix_flush;
00101 
00102     file->fp = fopen(filename, mode);
00103     return file->fp;
00104 }