zstd/lib/zstd.h

1959   ZSTD_decompressContinue() needs previous data blocks during decompression, up to `windowSize` bytes.
1960   ZSTD_decompressContinue() is very sensitive to contiguity,
1968   In a round buffer methodology, ZSTD_decompressContinue() decompresses each block next to previous one,
1983   Then use ZSTD_nextSrcSizeToDecompress() and ZSTD_decompressContinue() alternatively.
1984   ZSTD_nextSrcSizeToDecompress() tells how many bytes to provide as 'srcSize' to ZSTD_decompressContinue().
1985   ZSTD_decompressContinue() requires this _exact_ amount of bytes, or it will fail.
1987  @result of ZSTD_decompressContinue() is the number of bytes regenerated within 'dst' (necessarily <= dstCapacity).
1988   It can be zero : it just means ZSTD_decompressContinue() has decoded some metadata item.
2006   For skippable frames ZSTD_decompressContinue() always returns 0 : it only skips the content.
2038 ZSTDLIB_API size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize);