Fix bug 2878 (excessive relocations at startup for charsets, reported by

Ross Burton): fc-lang/fc-lang now creates the static form of the
    langset, not the dynamic form, so that the charsets should now be in
    .rodata.

ChangeLog

@@ -1,3 +1,14 @@
+2005-11-04  Patrick Lam  <plam@mit.edu>
+	* fc-lang/fc-lang.c:
+	* src/fccharset.c:
+	* src/fcint.h:
+	* src/fclang.c:
+
+	Fix bug 2878 (excessive relocations at startup for charsets,
+	reported by Ross Burton): fc-lang/fc-lang now creates the
+	static form of the langset, not the dynamic form, so that
+	the charsets should now be in .rodata.
+
 2005-11-04  Patrick Lam  <plam@mit.edu>
 	* src/fcdir.c (FcDirScanConfig):
 

fc-lang/fc-lang.c

@@ -37,6 +37,10 @@
  * functions are also needed in slightly modified form
  */
 
+const FcChar16 *langBankNumbers = 0;
+const FcCharLeaf	*langBankLeaves = 0;
+const int *langBankLeafIdx = 0;
+
 void
 FcMemAlloc (int kind, int size)
 {
@@ -232,6 +236,7 @@ main (int argc, char **argv)
     int		argi;
     FcCharLeaf	**leaves;
     int		total_leaves = 0;
+    int		leafidx_count = 0, numbers_count = 0, numbers_ptr = 0;
     int		l, sl, tl;
     int		c;
     char	line[1024];
@@ -306,7 +311,7 @@ main (int argc, char **argv)
     /*
      * Dump leaves
      */
-    printf ("static const FcCharLeaf	leaves[%d] = {\n", tl);
+    printf ("const FcCharLeaf	langBankLeaves[%d] = {\n", tl);
     for (l = 0; l < tl; l++)
     {
 	printf ("    { { /* %d */", l);
@@ -319,7 +324,6 @@ main (int argc, char **argv)
 	printf ("\n    } },\n");
     }
     printf ("};\n\n");
-    printf ("#define L(n) ((FcCharLeaf *) &leaves[n])\n\n");
 
     /*
      * Find duplicate charsets
@@ -362,8 +366,27 @@ main (int argc, char **argv)
 	
 	if (duplicate[i] >= 0)
 	    continue;
-	printf ("static const FcCharLeaf *leaves_%s[%d] = {\n",
-		names[i], sets[i]->num);
+
+	for (n = 0; n < sets[i]->num; n++)
+	{
+	    for (l = 0; l < tl; l++)
+		if (leaves[l] == FcCharSetGetLeaf(sets[i], n))
+		    break;
+	    if (l == tl)
+		fatal (names[i], 0, "can't find leaf");
+            leafidx_count++;
+            numbers_count += sets[i]->num;
+	}
+    }
+
+    printf ("const int langBankLeafIdx[%d] = {\n",
+	    leafidx_count);
+    for (i = 0; sets[i]; i++)
+    {
+	int n;
+	
+	if (duplicate[i] >= 0)
+	    continue;
 	for (n = 0; n < sets[i]->num; n++)
 	{
 	    if (n % 8 == 0)
@@ -373,17 +396,21 @@ main (int argc, char **argv)
 		    break;
 	    if (l == tl)
 		fatal (names[i], 0, "can't find leaf");
-	    printf (" L(%3d),", l);
+	    printf (" %3d,", l);
 	    if (n % 8 == 7)
 		printf ("\n");
 	}
 	if (n % 8 != 0)
 	    printf ("\n");
+    }
     printf ("};\n\n");
 
+    printf ("const FcChar16 langBankNumbers[%d] = {\n",
+	    numbers_count);
 
-	printf ("static const FcChar16 numbers_%s[%d] = {\n",
-		names[i], sets[i]->num);
+    for (i = 0; sets[i]; i++)
+    {
+	int n;
 	for (n = 0; n < sets[i]->num; n++)
 	{
 	    if (n % 8 == 0)
@@ -394,27 +421,27 @@ main (int argc, char **argv)
 	}
 	if (n % 8 != 0)
 	    printf ("\n");
-	printf ("};\n\n");
     }
-    printf ("#undef L\n\n");
+    printf ("};\n\n");
     
     /*
      * Dump sets
      */
 
-    printf ("static const FcLangCharSet  fcLangCharSets[] = {\n");
+    printf ("const FcLangCharSet  fcLangCharSets[] = {\n");
     for (i = 0; sets[i]; i++)
     {
 	int	j = duplicate[i];
 
 	if (j < 0)
 	    j = i;
+
 	printf ("    { (FcChar8 *) \"%s\",\n"
-		"      { FC_REF_CONSTANT, %d, FC_BANK_DYNAMIC, "
-		"{ { (FcCharLeaf **) leaves_%s, "
-		"(FcChar16 *) numbers_%s } } } },\n",
+		"      { FC_REF_CONSTANT, %d, FC_BANK_LANGS, "
+		"{ .stat = { %d, %d } } } },\n",
 		langs[i],
-		sets[j]->num, names[j], names[j]);
+		sets[j]->num, j, numbers_ptr);
+        numbers_ptr += sets[i]->num;
     }
     printf ("};\n\n");
     printf ("#define NUM_LANG_CHAR_SET	%d\n", i);

src/fccharset.c

@@ -38,6 +38,24 @@ static int charset_leaf_ptr, charset_leaf_count;
 static int ** leaf_idx = 0;
 static int charset_leaf_idx_ptr, charset_leaf_idx_count;
 
+extern const FcChar16 *langBankNumbers;
+extern const FcCharLeaf	*langBankLeaves;
+extern const int *langBankLeafIdx;
+
+static FcBool
+FcCharSetEnsureBank (int bi);
+
+void
+FcLangCharSetPopulate (void)
+{
+    int bi = FcCacheBankToIndex (FC_BANK_LANGS);
+    FcCharSetEnsureBank (bi);
+    charsets[bi] = 0;
+    numbers[bi] = (FcChar16 *)&langBankNumbers;
+    leaves[bi] = (FcCharLeaf *)&langBankLeaves;
+    leaf_idx[bi] = (int *)&langBankLeafIdx;
+}
+
 FcCharSet *
 FcCharSetCreate (void)
 {

src/fcint.h

@@ -99,6 +99,8 @@
 
 #define FC_MEM_NUM	    30
 
+#define FC_BANK_LANGS	    0xfcfcfcfc
+
 typedef enum _FcValueBinding {
     FcValueBindingWeak, FcValueBindingStrong, FcValueBindingSame
 } FcValueBinding;
@@ -524,6 +526,9 @@ FcFileTime
 FcConfigModifiedTime (FcConfig *config);
 
 /* fccharset.c */
+void
+FcLangCharSetPopulate (void);
+
 FcCharSet *
 FcCharSetFreeze (FcCharSet *cs);
 

src/fclang.c

@@ -44,6 +44,8 @@ struct _FcLangSet {
 #define FcLangSetBitSet(ls, id)	((ls)->map[(id)>>5] |= ((FcChar32) 1 << ((id) & 0x1f)))
 #define FcLangSetBitGet(ls, id) (((ls)->map[(id)>>5] >> ((id) & 0x1f)) & 1)
 
+static FcBool langsets_populated = FcFalse;
+
 FcLangSet *
 FcFreeTypeLangSet (const FcCharSet  *charset, 
 		   const FcChar8    *exclusiveLang)
@@ -53,6 +55,11 @@ FcFreeTypeLangSet (const FcCharSet  *charset,
     const FcCharSet *exclusiveCharset = 0;
     FcLangSet	    *ls;
 
+    if (!langsets_populated)
+    {
+        FcLangCharSetPopulate ();
+        langsets_populated = FcTrue;
+    }
 
     if (exclusiveLang)
 	exclusiveCharset = FcCharSetForLang (exclusiveLang);
@@ -188,6 +195,13 @@ FcCharSetForLang (const FcChar8 *lang)
 {
     int		i;
     int		country = -1;
+
+    if (!langsets_populated)
+    {
+        FcLangCharSetPopulate ();
+        langsets_populated = FcTrue;
+    }
+
     for (i = 0; i < NUM_LANG_CHAR_SET; i++)
     {
 	switch (FcLangCompare (lang, fcLangCharSets[i].lang)) {