ZSTD_compressSequencesAndLiterals requires srcSize as parameter

this makes it possible to adjust windowSize to its tightest.

doc/zstd_manual.html

@@ -1421,7 +1421,7 @@ ZSTD_compressSequences(ZSTD_CCtx* cctx,
 ZSTD_compressSequencesAndLiterals(ZSTD_CCtx* cctx,
                       void* dst, size_t dstCapacity,
                 const ZSTD_Sequence* inSeqs, size_t nbSequences,
-                const void* literals, size_t litSize);
+                const void* literals, size_t litSize, size_t srcSize);
 </b><p> This is a variant of ZSTD_compressSequences() which,
  instead of receiving (src,srcSize) as input parameter, receives (literals,litSize),
  aka all the literals, already extracted and laid out into a single continuous buffer.

lib/compress/zstd_compress.c

@@ -7291,7 +7291,7 @@ size_t
 ZSTD_compressSequencesAndLiterals(ZSTD_CCtx* cctx,
                     void* dst, size_t dstCapacity,
                     const ZSTD_Sequence* inSeqs, size_t inSeqsSize,
-                    const void* literals, size_t litSize)
+                    const void* literals, size_t litSize, size_t srcSize)
 {
     BYTE* op = (BYTE*)dst;
     size_t cSize = 0;
@@ -7299,7 +7299,7 @@ ZSTD_compressSequencesAndLiterals(ZSTD_CCtx* cctx,
     /* Transparent initialization stage, same as compressStream2() */
     DEBUGLOG(4, "ZSTD_compressSequencesAndLiterals (dstCapacity=%zu)", dstCapacity);
     assert(cctx != NULL);
-    FORWARD_IF_ERROR(ZSTD_CCtx_init_compressStream2(cctx, ZSTD_e_continue, 0), "CCtx initialization failed");
+    FORWARD_IF_ERROR(ZSTD_CCtx_init_compressStream2(cctx, ZSTD_e_end, srcSize), "CCtx initialization failed");
 
     if (cctx->appliedParams.blockDelimiters == ZSTD_sf_noBlockDelimiters) {
         RETURN_ERROR(frameParameter_unsupported, "This mode is only compatible with explicit delimiters");
@@ -7310,7 +7310,7 @@ ZSTD_compressSequencesAndLiterals(ZSTD_CCtx* cctx,
 
     /* Begin writing output, starting with frame header */
     {   size_t const frameHeaderSize = ZSTD_writeFrameHeader(op, dstCapacity,
-                    &cctx->appliedParams, ZSTD_CONTENTSIZE_UNKNOWN, cctx->dictID);
+                    &cctx->appliedParams, srcSize, cctx->dictID);
         op += frameHeaderSize;
         assert(frameHeaderSize <= dstCapacity);
         dstCapacity -= frameHeaderSize;

lib/zstd.h

@@ -1675,7 +1675,6 @@ ZSTD_compressSequences(ZSTD_CCtx* cctx,
  * but it also features the following limitations:
  * - Only supports explicit delimiter mode
  * - Not compatible with frame checksum, which must disabled
- * - Does not write the content size in frame header
  * - If any block is incompressible, will fail and return an error
  * - @litSize must be == sum of all @.litLength fields in @inSeqs. Any discrepancy will generate an error.
  * - the buffer @literals must be larger than @litSize by at least 8 bytes.
@@ -1685,7 +1684,7 @@ ZSTDLIB_STATIC_API size_t
 ZSTD_compressSequencesAndLiterals(ZSTD_CCtx* cctx,
                                   void* dst, size_t dstCapacity,
                             const ZSTD_Sequence* inSeqs, size_t nbSequences,
-                            const void* literals, size_t litSize);
+                            const void* literals, size_t litSize, size_t srcSize);
 
 
 /*! ZSTD_writeSkippableFrame() :

tests/fullbench.c

@@ -623,9 +623,9 @@ local_compressSequencesAndLiterals(const void* input, size_t inputSize,
     ZSTD_CCtx_setParameter(g_zcc, ZSTD_c_repcodeResolution, ZSTD_ps_enable);
 #endif
     assert(12 + nbSeqs * sizeof(ZSTD_Sequence) + nbLiterals == inputSize); (void)inputSize;
-    (void)payload; (void)srcSize;
+    (void)payload;
 
-    return ZSTD_compressSequencesAndLiterals(g_zcc, dst, dstCapacity, seqs, nbSeqs, literals, nbLiterals);
+    return ZSTD_compressSequencesAndLiterals(g_zcc, dst, dstCapacity, seqs, nbSeqs, literals, nbLiterals, srcSize);
 }
 
 static PrepResult prepConvertSequences(const void* src, size_t srcSize, int cLevel)

tests/fuzzer.c

@@ -3909,21 +3909,21 @@ static int basicUnitTests(U32 const seed, double compressibility)
             FUZ_transferLiterals(litBuffer, decompressSize, CNBuffer, srcSize, seqs, nbSeqs);
 
             /* not enough literals: must fail */
-            compressedSize = ZSTD_compressSequencesAndLiterals(cctx, dst, dstCapacity, seqs, nbSeqs, src, litSize-1);
+            compressedSize = ZSTD_compressSequencesAndLiterals(cctx, dst, dstCapacity, seqs, nbSeqs, src, litSize-1, srcSize);
             if (!ZSTD_isError(compressedSize)) {
                 DISPLAY("ZSTD_compressSequencesAndLiterals() should have failed: not enough literals provided\n");
                 goto _output_error;
             }
 
             /* too many literals: must fail */
-            compressedSize = ZSTD_compressSequencesAndLiterals(cctx, dst, dstCapacity, seqs, nbSeqs, src, litSize+1);
+            compressedSize = ZSTD_compressSequencesAndLiterals(cctx, dst, dstCapacity, seqs, nbSeqs, src, litSize+1, srcSize);
             if (!ZSTD_isError(compressedSize)) {
                 DISPLAY("ZSTD_compressSequencesAndLiterals() should have failed: too many literals provided\n");
                 goto _output_error;
             }
 
             /* correct amount of literals: should compress successfully */
-            compressedSize = ZSTD_compressSequencesAndLiterals(cctx, dst, dstCapacity, seqs, nbSeqs, litBuffer, litSize);
+            compressedSize = ZSTD_compressSequencesAndLiterals(cctx, dst, dstCapacity, seqs, nbSeqs, litBuffer, litSize, srcSize);
             if (ZSTD_isError(compressedSize)) {
                 DISPLAY("Error in ZSTD_compressSequencesAndLiterals()\n");
                 goto _output_error;