Add documentation for new api functions

lib/zstd.h

@@ -1328,11 +1328,29 @@ ZSTDLIB_API size_t ZSTD_generateSequences(ZSTD_CCtx* zc, ZSTD_Sequence* outSeqs,
  */
 ZSTDLIB_API size_t ZSTD_mergeBlockDelimiters(ZSTD_Sequence* sequences, size_t seqsSize);
 
+/*! ZSTD_compressSequencesCCtx() :
+ * Compress sequences given by inSeqs, generated from source buffer 'src', using a cctx.
+ * The entire source is compressed into a single frame. 
+ * 
+ * If invoked with ZSTD_sf_noBlockDelimiters, the array of ZSTD_Sequence is expected to contain
+ * no block delimiters (defined in ZSTD_Sequence). Block boundaries are roughly determined based on
+ * the block size derived from the cctx, and sequences may be split.
+ * 
+ * If invoked with ZSTD_sf_explicitBlockDelimiters, the array of ZSTD_Sequence is expected to contain
+ * block delimiters.
+ * 
+ * @return : final compressed size.
+ */
 ZSTDLIB_API size_t ZSTD_compressSequencesCCtx(ZSTD_CCtx* const cctx, void* dst, size_t dstSize,
                                   const ZSTD_Sequence* inSeqs, size_t inSeqsSize,
                                   const void* src, size_t srcSize,
                                   ZSTD_sequenceFormat_e format);     
 
+/*! ZSTD_compressSequences() :
+ * Creates a default CCtx based on the given compression level, and invokes ZSTD_compressSequencesCCtx().
+ * 
+ * @return : final compressed size.
+ */
 ZSTDLIB_API size_t ZSTD_compressSequences(void* dst, size_t dstSize,
                                   const ZSTD_Sequence* inSeqs, size_t inSeqsSize,
                                   const void* src, size_t srcSize, int compressionLevel,