Idx File «TRENDING»

fclose(f); return 0; Benchmark results (average of 10 runs, reading 60k MNIST images):

| Code (decimal) | Code (hex) | Data Type | C equivalent (typical) | .NET equivalent | |----------------|------------|-----------|------------------------|------------------| | 0x08 | 8 | Unsigned byte (uint8) | unsigned char | Byte | | 0x09 | 9 | Signed byte (int8) | signed char | SByte | | 0x0B | 11 | Short (int16) | short | Int16 | | 0x0C | 12 | Int32 (int) | int | Int32 | | 0x0D | 13 | Float (single) | float | Single | | 0x0E | 14 | Double | double | Double | idx file

with open(filename, 'wb') as f: # Write magic: [0, 0, type_code, dim_count] f.write(bytes([0, 0, data_type_code, dim_count])) # Write dimensions (big-endian) for dim in data_array.shape: f.write(dim.to_bytes(4, 'big')) # Write data (row-major, native endianness) # Convert to flat bytes in correct order data_array.astype(data_array.dtype, copy=False).tofile(f) #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <arpa/inet.h> typedef struct idx_file uint8_t data_type; // 0x08,0x09,0x0B-0x0E uint8_t dim_count; // 1-255 uint32_t *dims; // array of dim_count sizes void *data; // raw data pointer size_t data_size_bytes; idx_file_t; fclose(f); return 0; Benchmark results (average of 10