import mmap class OptionalArabicRules: def init (self, bin_path): with open(bin_path, 'rb') as f: self.data = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) self.parse_header()
# Prepare header magic = b'FGOA' version = data['version'] rules = data['optional_features'] rule_count = len(rules) fg-optional-arabic.bin
body.append(len(outputs)) for out in outputs: body.extend(struct.pack('<I', out)) bin_path): with open(bin_path
# Hypothetical compiler hb-compile-features -f optional-arabic.txt -o fg-optional-arabic.bin 4.1 Loading in a C/C++ Application #include <stdio.h> #include <stdint.h> typedef struct uint32_t magic; uint32_t version; uint32_t rule_count; uint32_t body_offset; FGHeader; 'rb') as f: self.data = mmap.mmap(f.fileno()