+size_t _fread_memfile(void *ptr, size_t size, size_t num, FILE *fp)\r
+{\r
+ size_t avail = (fp->BufferSpace - fp->Pos) / size;\r
+ if( avail == 0 )\r
+ fp->Flags |= FILE_FLAG_EOF;\r
+ if( num > avail ) num = avail;\r
+ size_t bytes = num * size;\r
+ memcpy(ptr, fp->Buffer + fp->Pos, bytes);\r
+ fp->Pos += bytes;\r
+ return num;\r
+}\r
+\r
+#if 0\r
+size_t _fread_memstream(void *ptr, size_t size, size_t num, FILE *fp)\r
+{\r
+ errno = ENOTIMPL;\r
+ return -1;\r
+}\r
+#endif\r
+\r
+size_t _fread_buffered(void *ptr, size_t size, FILE *fp)\r
+{\r
+ //_SysDebug("%p: %i-%i <= %i", fp,\r
+ // (int)fp->Pos, (int)fp->BufferOfs, (int)fp->BufferPos);\r
+ if( fp->BufferPos > 0 ) {\r
+ assert( fp->Pos - fp->BufferOfs <= (int)fp->BufferPos );\r
+ }\r
+ if( fp->BufferPos == 0 || fp->Pos - fp->BufferOfs == (int)fp->BufferPos )\r
+ {\r
+ int rv = _SysRead(fp->FD, fp->Buffer, fp->BufferSpace);\r
+ if( rv <= 0 ) {\r
+ fp->Flags |= FILE_FLAG_EOF;\r
+ return 0;\r
+ }\r
+ \r
+ fp->BufferPos = rv;\r
+ fp->BufferOfs = fp->Pos;\r
+ //_SysDebug("%p: Buffered %i at %i", fp, rv, fp->Pos);\r
+ }\r
+ \r
+ size_t inner_ofs = fp->Pos - fp->BufferOfs;\r
+ if(size > fp->BufferPos - inner_ofs)\r
+ size = fp->BufferPos - inner_ofs;\r
+ \r
+ //_SysDebug("%p: Read %i from %i+%i", fp, size,\r
+ // (int)fp->BufferOfs, inner_ofs);\r
+ memcpy(ptr, fp->Buffer + inner_ofs, size);\r
+ fp->Pos += size;\r
+ return size;\r
+}\r
+\r