Changeset 94647b0b for libcfa

Timestamp:

Nov 24, 2021, 9:10:18 PM (3 years ago)

Author:

Michael Brooks <mlbrooks@…>

Branches:

ADT, ast-experimental, enum, master, pthread-emulation, qualifiedEnum

Children:

7770cc8

Parents:

fefd77a

Message:

String peformance improvement by removing all remaining uses of handwritten ByteCopy?. Halves noshare-fresh execution time, though a ~40% slowdown remains vs stl-fresh.

File:

• libcfa/src/containers/string_res.cfa (modified) (4 diffs)

libcfa/src/containers/string_res.cfa

@@ -49 +49 @@
 static void ?{}( VbyteHeap &, size_t = 1000 );
 static void ^?{}( VbyteHeap & );
-static void ByteCopy( char *, int, int, char *, int, int ); // copy a block of bytes from one location in the heap to another
+
 static int ByteCmp( char *, int, int, char *, int, int );       // compare 2 blocks of bytes
 static char *VbyteAlloc( VbyteHeap &, int );                    // allocate a block bytes in the heap
@@ -875 +875 @@
 //######################### VbyteHeap #########################
 
-// Move characters from one location in the byte-string area to another. The routine handles the following situations:
-//
-// if the |Src| > |Dst| => truncate
-// if the |Dst| > |Src| => pad Dst with blanks
-
-void ByteCopy( char *Dst, int DstStart, int DstLnth, char *Src, int SrcStart, int SrcLnth ) {
-    for ( int i = 0; i < DstLnth; i += 1 ) {
-      if ( i == SrcLnth ) {                             // |Dst| > |Src|
-            for ( ; i < DstLnth; i += 1 ) {             // pad Dst with blanks
-                Dst[DstStart + i] = ' ';
-            } // for
-            break;
-        } // exit
-        Dst[DstStart + i] = Src[SrcStart + i];
-    } // for
-} // ByteCopy
-
 // Compare two byte strings in the byte-string area. The routine returns the following values:
 //
@@ -955 +938 @@
     h = Header.flink;                                   // ignore header node
     for (;;) {
-                ByteCopy( EndVbyte, 0, h->lnth, h->s, 0, h->lnth );
+                memmove( EndVbyte, h->s, h->lnth );
                 obase = h->s;
                 h->s = EndVbyte;
@@ -997 +980 @@
     int AmountUsed, AmountFree;
 
+//    assert( false );
+
     AmountUsed = 0;
     for ( HandleNode *i = Header.flink; i != &Header; i = i->flink ) { // calculate amount of byte area used