SkFontMgr for Android.

src/ports/SkFontConfigParser_android.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFontConfigParser_android.h"
 #include "SkTDArray.h"
+#include "SkTSearch.h"
 #include "SkTypeface.h"
 
 #include <expat.h>
 #include <stdio.h>
 #include <sys/system_properties.h>
 
+#include <limits>
+
 #define SYSTEM_FONTS_FILE "/system/etc/system_fonts.xml"
 #define FALLBACK_FONTS_FILE "/system/etc/fallback_fonts.xml"
 #define VENDOR_FONTS_FILE "/vendor/etc/fallback_fonts.xml"
 
 // These defines are used to determine the kind of tag that we're currently
 // populating with data. We only care about the sibling tags nameset and fileset
 // for now.
 #define NO_TAG 0
 #define NAMESET_TAG 1
 #define FILESET_TAG 2
@@ skipping 15 matching lines @@
     FontFamily *currentFamily;         // The current family being created
     FontFileInfo *currentFontInfo;     // The current fontInfo being created
     int currentTag;                    // A flag to indicate whether we're in nameset/fileset tags
 };
 
 /**
  * Handler for arbitrary text. This is used to parse the text inside each name
  * or file tag. The resulting strings are put into the fNames or FontFileInfo arrays.
  */
 static void textHandler(void *data, const char *s, int len) {
+    SkAutoAsciiToLC tolc(s);
     FamilyData *familyData = (FamilyData*) data;
     // Make sure we're in the right state to store this name information
     if (familyData->currentFamily &&
             (familyData->currentTag == NAMESET_TAG || familyData->currentTag == FILESET_TAG)) {
         switch (familyData->currentTag) {
         case NAMESET_TAG:
-            familyData->currentFamily->fNames.push_back().set(s, len);
+            familyData->currentFamily->fNames.push_back().set(tolc.lc(), len);
             break;
         case FILESET_TAG:
             if (familyData->currentFontInfo) {
                 familyData->currentFontInfo->fFileName.set(s, len);
             }
             break;
         default:
             // Noop - don't care about any text that's not in the Fonts or Names list
             break;
         }
     }
 }
 
+/** http://www.w3.org/TR/html-markup/datatypes.html#common.data.integer.non-negative-def */
+template <typename T> static bool parseNonNegativeInteger(const char* s, T* value) {
+    SK_COMPILE_ASSERT(std::numeric_limits<T>::is_integer, T_must_be_integer);
+    const T nMax = std::numeric_limits<T>::max() / 10;
+    const T dMax = std::numeric_limits<T>::max() - (nMax * 10);
+    T n = 0;
+    for (; *s; ++s) {
+        // Check if digit
+        if (*s < '0' || '9' < *s) {
+            return false;
+        }
+        int d = *s - '0';
+        // Check for overflow
+        if (n > nMax || (n == nMax && d > dMax)) {
+            return false;
+        }
+        n = (n * 10) + d;
+    }
+    *value = n;
+    return true;
+}
+
 /**
  * Handler for font files. This processes the attributes for language and
  * variants then lets textHandler handle the actual file name
  */
 static void fontFileElementHandler(FamilyData *familyData, const char **attributes) {
 
     FontFileInfo& newFileInfo = familyData->currentFamily->fFontFiles.push_back();
     if (attributes) {
         int currentAttributeIndex = 0;
         while (attributes[currentAttributeIndex]) {
             const char* attributeName = attributes[currentAttributeIndex];
             const char* attributeValue = attributes[currentAttributeIndex+1];
             int nameLength = strlen(attributeName);
             int valueLength = strlen(attributeValue);
             if (strncmp(attributeName, "variant", nameLength) == 0) {
                 if (strncmp(attributeValue, "elegant", valueLength) == 0) {
                     newFileInfo.fPaintOptions.setFontVariant(SkPaintOptionsAndroid::kElegant_Variant);
                 } else if (strncmp(attributeValue, "compact", valueLength) == 0) {
                     newFileInfo.fPaintOptions.setFontVariant(SkPaintOptionsAndroid::kCompact_Variant);
                 }
             } else if (strncmp(attributeName, "lang", nameLength) == 0) {
                 newFileInfo.fPaintOptions.setLanguage(attributeValue);
+            } else if (strncmp(attributeName, "index", nameLength) == 0) {
+                int value;
+                if (parseNonNegativeInteger(attributeValue, &value)) {
+                    newFileInfo.fIndex = value;
+                } else {
+                    SkDebugf("---- SystemFonts index=%s (INVALID)", attributeValue);
+                }
             }
             //each element is a pair of attributeName/attributeValue string pairs
             currentAttributeIndex += 2;
         }
     }
     familyData->currentFontInfo = &newFileInfo;
     XML_SetCharacterDataHandler(*familyData->parser, textHandler);
 }
 
 /**
@@ skipping 203 matching lines @@
     SkString locale(6);
     char* localeCStr = locale.writable_str();
 
     strncpy(localeCStr, propLang, 2);
     localeCStr[2] = '-';
     strncpy(&localeCStr[3], propRegn, 2);
     localeCStr[5] = '\0';
 
     return locale;
 }