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libretroadmin
d56b453891
Deflate, zlib and gzip streams go through rinflate and rdeflate, zstd through rzstd, CHD images through rchd, zip archives through rzip_archive and PNG through rpng. The bundled libraries, their build glue and the system-library options are gone; adler32 and uncompress keep zlib's ABI for the prebuilt FFmpeg archives that still call them. libretro-common is one CMake library that the core, the headless tool and the unit tests all link. The reads take shorter paths on the way. CHD decodes straight from the loader's reads and a range of blocks at a time, and a file read at any alignment decodes into place; CSO keeps one inflate stream instead of one per block; a plain ISO serves a file read with one read of its exact bytes; a stored zip member is read in place and a deflated one through restart points rather than a copy of the whole image in memory; zip members decode into the caller's buffer; sequential reads through the frontend's VFS skip the seek, which also keeps its buffering. libretro/test reads one image as ISO, CSO, CHD and zip through the block devices, boots each, and checks the codecs against Python-made vectors; a CI job runs it.
25 lines
1.2 KiB
C++
25 lines
1.2 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <string>
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// zlib-family codecs on libretro-common's rinflate/rdeflate.
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// windowBits follow zlib: -15 raw deflate, 15 zlib, 31 gzip, 47 zlib or gzip.
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// Decodes one complete stream into out[0..outLen). Returns the bytes produced, or -1
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// if the stream is bad, truncated, or doesn't fit. *consumed receives the input used.
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int64_t InflateBuffer(int windowBits, const uint8_t *in, size_t inLen, uint8_t *out, size_t outLen, size_t *consumed = nullptr);
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// The same through a stream from rinflate_new(), reset here; for callers that decode
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// many small streams and shouldn't allocate for each one.
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int64_t InflateBuffer(void *stream, int windowBits, const uint8_t *in, size_t inLen, uint8_t *out, size_t outLen, size_t *consumed = nullptr);
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// RFC 1950 Adler-32, zlib's adler32() (start with 1).
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uint32_t Adler32(uint32_t adler, const uint8_t *buf, size_t len);
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// Whole-string helpers. compress_string writes zlib by default (31 for gzip);
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// decompress_string accepts zlib or gzip.
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bool compress_string(const std::string &str, std::string *dest, int compressionlevel = 9, int windowBits = 15);
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bool decompress_string(const std::string &str, std::string *dest);
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