r10128: Add SQLite3 backend

[clsql.git] / db-sqlite3 / init-func-sample / iso-8859-15-coll.c

diff --git a/db-sqlite3/init-func-sample/iso-8859-15-coll.c b/db-sqlite3/init-func-sample/iso-8859-15-coll.c
new file mode 100644 (file)
index 0000000..0e7fea1
--- /dev/null
+++ b/db-sqlite3/init-func-sample/iso-8859-15-coll.c
@@ -0,0 +1,79 @@
+/****************************************************************************
+ * FILE IDENTIFICATION
+ *
+ *   Name:          iso-8859-15-coll.c
+ *   Purpose:       SQLite 3 initialization function for  
+ *                  ISO-8859-15 collating sequence.
+ *   Programmer:    Aurelio Bignoli
+ *   Date Started:  Oct 2004
+ *
+ * $Id$
+ *
+ * This file, part of CLSQL, is Copyright (c) 2004 by Aurelio Bignoli
+ *
+ * CLSQL users are granted the rights to distribute and use this software
+ * as governed by the terms of the Lisp Lesser GNU Public License
+ * (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+ ***************************************************************************/
+
+
+/* Collating sequence name. CI = Case Insensitive */
+#define ISO_8859_15_CI_NAME "ISO_8859_15_CI"
+
+/* Conversion table. */
+const unsigned char iso_8859_15_ci [] = {
+  /* 0 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 
+  /* 1 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 
+  /* 2 */ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 
+  /* 3 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 
+  /* 4 */ 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 
+  /* 5 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 
+  /* 6 */ 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 
+  /* 7 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 
+  /* 8 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x73, 0x8B, 0x6F, 0x8D, 0x7A, 0x79, 
+  /* 9 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x73, 0x9B, 0x6F, 0x9D, 0x7A, 0x79, 
+  /* A */ 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0x73, 0xA7, 0x73, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 
+  /* B */ 0xB0, 0xB1, 0xB2, 0xB3, 0x7A, 0xB5, 0xB6, 0xB7, 0x7A, 0xB9, 0xBA, 0xBB, 0x6F, 0xBD, 0x79, 0xBF, 
+  /* C */ 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x65, 0x63, 0x65, 0x65, 0x65, 0x65, 0x69, 0x69, 0x69, 0x69, 
+  /* D */ 0x64, 0x6E, 0x6F, 0x6F, 0x6F, 0x6F, 0x6F, 0xD7, 0x6F, 0x75, 0x75, 0x75, 0x75, 0x79, 0xDE, 0x73, 
+  /* E */ 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x65, 0x63, 0x65, 0x65, 0x65, 0x65, 0x69, 0x69, 0x69, 0x69,
+  /* F */ 0x64, 0x6E, 0x6F, 0x6F, 0x6F, 0x6F, 0x6F, 0xF7, 0x6F, 0x75, 0x75, 0x75, 0x75, 0x79, 0xFE, 0x73
+};
+
+/*
+ * A modified version of sqlite3StrNICmp in sqlite/src/util.c
+ */
+int iso_8859_15_ci_StrCmp(const char *zLeft, const char *zRight, int N){
+  register unsigned char *a, *b;
+  a = (unsigned char *)zLeft;
+  b = (unsigned char *)zRight;
+  while( N-- > 0 && *a!=0 && iso_8859_15_ci[*a]==iso_8859_15_ci[*b]){ a++; b++; }
+  return N<0 ? 0 : iso_8859_15_ci[*a] - iso_8859_15_ci[*b];
+}
+
+/*
+ * A modified version of nocaseCollatinFunc in sqlite/src/main.c.
+ */
+int iso_8859_15_ci_CollatingFunc(
+  void *NotUsed,
+  int nKey1, const void *pKey1,
+  int nKey2, const void *pKey2
+){
+  int r = iso_8859_15_ci_StrCmp(
+      (const char *)pKey1, (const char *)pKey2, (nKey1<nKey2)?nKey1:nKey2);
+  if( 0==r ){
+    r = nKey1-nKey2;
+  }
+  return r;
+}
+ 
+/* 
+ * Set the ISO_8859_15_CI collating sequence for a db.
+ */
+#include "sqlite3.h"
+
+int create_iso_8859_15_ci_collation (sqlite3 *db)
+{
+  return sqlite3_create_collation (db, ISO_8859_15_CI_NAME, SQLITE_UTF8, 0,
+                                  iso_8859_15_ci_CollatingFunc);
+}