Mmap in the ICU data file and pass it to udata_setCommonData()

Now done in TiledLibreOffice's lo_initialize(), but should probably be
done in common LO code instead.

Change-Id: I398a703943d13c6d715e4c88ead2a629955fb7c9

ios/experimental/TiledLibreOffice/TiledLibreOffice/lo.mm

@@ -7,6 +7,8 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
 
 #include <premac.h>
 #import <UIKit/UIKit.h>
@@ -15,6 +17,9 @@
 #include <osl/process.h>
 #include <touch/touch.h>
 
+#include <unicode/udata.h>
+#include <unicode/ucnv.h>
+
 // generated by solenv/bin/native-code.py:
 #include "native-code.mm"
 
@@ -45,6 +50,36 @@ extern "C" void lo_initialize(NSString *documentPath)
     NSString *uno_types = createPaths(@"-env:UNO_TYPES=", app_root_escaped, @[@"offapi.rdb", @"oovbaapi.rdb", @"types.rdb"]);
     NSString *uno_services = createPaths(@"-env:UNO_SERVICES=", app_root_escaped, @[@"ure/services.rdb", @"services.rdb"]);
 
+    int fd = open([[bundlePath stringByAppendingPathComponent:@U_ICUDATA_NAME".dat"] UTF8String], O_RDONLY);
+    if (fd != -1) {
+        struct stat st;
+        if (fstat(fd, &st) != -1
+            && st.st_size < (size_t)-1) {
+            void *icudata = mmap(0, (size_t) st.st_size, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0);
+            if (icudata == MAP_FAILED) {
+#if OSL_DEBUG_LEVEL > 0
+                NSLog(@"mmap failed:%s", strerror(errno));
+#endif
+            } else {
+                UErrorCode icuStatus = U_ZERO_ERROR;
+                udata_setCommonData(icudata, &icuStatus);
+                if (U_FAILURE(icuStatus))
+                    NSLog(@"udata_setCommonData failed");
+                else {
+#if OSL_DEBUG_LEVEL > 0
+                    // Test that ICU works...
+                    UConverter *cnv = ucnv_open("iso-8859-3", &icuStatus);
+                    NSLog(@"ucnv_open(iso-8859-3)-> %p, err = %s, name=%s",
+                          (void *)cnv, u_errorName(icuStatus), (!cnv)?"?":ucnv_getName(cnv,&icuStatus));
+                    if (U_SUCCESS(icuStatus))
+                        ucnv_close(cnv);
+#endif
+                }
+            }
+        }
+        close(fd);
+    }
+
     const char *argv[] = {
         [[[NSBundle mainBundle] executablePath] UTF8String],
         "-env:URE_INTERNAL_LIB_DIR=file:///",