extmod/moduzlib: DecompIO: Add support for gzip-formatted streams.
This uses extension introduced in CPython 3.5: if wbits (dictionary size code) has value 16 + 8..15, it means that gzip-formatted stream expected.zephyr-rebase
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d8a4d9d67c
commit
7b901d6fb7
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@ -81,10 +81,18 @@ STATIC mp_obj_t decompio_make_new(const mp_obj_type_t *type, size_t n_args, size
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if (n_args > 1) {
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if (n_args > 1) {
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dict_opt = mp_obj_get_int(args[1]);
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dict_opt = mp_obj_get_int(args[1]);
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}
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}
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if (dict_opt >= 0) {
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if (dict_opt >= 16) {
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int st = uzlib_gzip_parse_header(&o->decomp);
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if (st != TINF_OK) {
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goto header_error;
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}
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dict_sz = 1 << (dict_opt - 16);
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} else if (dict_opt >= 0) {
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dict_opt = uzlib_zlib_parse_header(&o->decomp);
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dict_opt = uzlib_zlib_parse_header(&o->decomp);
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if (dict_opt < 0) {
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if (dict_opt < 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "zlib header"));
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header_error:
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "compression header"));
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}
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}
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dict_sz = 1 << dict_opt;
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dict_sz = 1 << dict_opt;
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} else {
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} else {
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@ -212,6 +220,7 @@ const mp_obj_module_t mp_module_uzlib = {
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#include "uzlib/tinflate.c"
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#include "uzlib/tinflate.c"
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#include "uzlib/tinfzlib.c"
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#include "uzlib/tinfzlib.c"
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#include "uzlib/tinfgzip.c"
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#include "uzlib/adler32.c"
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#include "uzlib/adler32.c"
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#include "uzlib/crc32.c"
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#include "uzlib/crc32.c"
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