The sb argument is a pointer to a struct zip_source_stat (shown below), into which information about the zip source is placed.

struct zip_source_stat { zip_uint64_t valid; /* which fields have valid values */ const char *name; /* name of the file */ zip_uint64_t index; /* index within archive */ zip_uint64_t size; /* size of file (uncompressed) */ zip_uint64_t comp_size; /* size of file (compressed) */ time_t mtime; /* modification time */ zip_uint32_t crc; /* crc of file data */ zip_uint16_t comp_method; /* compression method used */ zip_uint16_t encryption_method; /* encryption method used */ zip_uint32_t flags; /* reserved for future use */ };

The valid field of the structure specifies which other fields are valid. Check if the flag defined by the following defines are in valid before accessing the fields:

ZIP_SOURCE_STAT_NAME

name

ZIP_SOURCE_STAT_INDEX

index

ZIP_SOURCE_STAT_SIZE

size

ZIP_SOURCE_STAT_COMP_SIZE

comp_size

ZIP_SOURCE_STAT_MTIME

mtime

ZIP_SOURCE_STAT_CRC

crc

ZIP_SOURCE_STAT_COMP_METHOD

comp_method

ZIP_SOURCE_STAT_ENCRYPTION_METHOD

encryption_method

ZIP_SOURCE_STAT_FLAGS

flags

NOTE: Some fields may only be filled out after all data has been read from the source, for example the crc or size fields.