C++ SkString::resize方法代码示例

/**
 * This function parses the given filename and stores the results in the given
 * families array.
 */
static void parseConfigFile(const char *filename, SkTDArray<FontFamily*> &families) {

    FILE* file = NULL;

#if !defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
    // if we are using a version of Android prior to Android 4.2 (JellyBean MR1
    // at API Level 17) then we need to look for files with a different suffix.
    char sdkVersion[PROP_VALUE_MAX];
    __system_property_get("ro.build.version.sdk", sdkVersion);
    const int sdkVersionInt = atoi(sdkVersion);

    if (0 != *sdkVersion && sdkVersionInt < 17) {
        SkString basename;
        SkString updatedFilename;
        SkString locale = SkFontConfigParser::GetLocale();

        basename.set(filename);
        // Remove the .xml suffix. We'll add it back in a moment.
        if (basename.endsWith(".xml")) {
            basename.resize(basename.size()-4);
        }
        // Try first with language and region
        updatedFilename.printf("%s-%s.xml", basename.c_str(), locale.c_str());
        file = fopen(updatedFilename.c_str(), "r");
        if (!file) {
            // If not found, try next with just language
            updatedFilename.printf("%s-%.2s.xml", basename.c_str(), locale.c_str());
            file = fopen(updatedFilename.c_str(), "r");
        }
    }
#endif

    if (NULL == file) {
        file = fopen(filename, "r");
    }

    // Some of the files we attempt to parse (in particular, /vendor/etc/fallback_fonts.xml)
    // are optional - failure here is okay because one of these optional files may not exist.
    if (NULL == file) {
        return;
    }

    XML_Parser parser = XML_ParserCreate(NULL);
    FamilyData *familyData = new FamilyData(&parser, families);
    XML_SetUserData(parser, familyData);
    XML_SetElementHandler(parser, startElementHandler, endElementHandler);

    char buffer[512];
    bool done = false;
    while (!done) {
        fgets(buffer, sizeof(buffer), file);
        int len = strlen(buffer);
        if (feof(file) != 0) {
            done = true;
        }
        XML_Parse(parser, buffer, len, done);
    }
    XML_ParserFree(parser);
    fclose(file);
}

/**
 * Use the current system locale (language and region) to open the best matching
 * customization. For example, when the language is Japanese, the sequence might be:
 *      /system/etc/fallback_fonts-ja-JP.xml
 *      /system/etc/fallback_fonts-ja.xml
 *      /system/etc/fallback_fonts.xml
 */
FILE* openLocalizedFile(const char* origname) {
    FILE* file = 0;

#if !defined(SK_BUILD_FOR_ANDROID_NDK)
    SkString basename;
    SkString filename;
    char language[3] = "";
    char region[3] = "";

    basename.set(origname);
    // Remove the .xml suffix. We'll add it back in a moment.
    if (basename.endsWith(".xml")) {
        basename.resize(basename.size()-4);
    }
    getLocale(language, region);
    // Try first with language and region
    filename.printf("%s-%s-%s.xml", basename.c_str(), language, region);
    file = fopen(filename.c_str(), "r");
    if (!file) {
        // If not found, try next with just language
        filename.printf("%s-%s.xml", basename.c_str(), language);
        file = fopen(filename.c_str(), "r");
    }
#endif

    if (!file) {
        // If still not found, try just the original name
        file = fopen(origname, "r");
    }
    return file;
}

SkTypeface* SkFontHost::Deserialize(SkStream* stream) {
    load_system_fonts();

    int style = stream->readU8();

    int len = stream->readPackedUInt();
    if (len > 0) {
        SkString str;
        str.resize(len);
        stream->read(str.writable_str(), len);
        
        const FontInitRec* rec = gSystemFonts;
        for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) {
            if (strcmp(rec[i].fFileName, str.c_str()) == 0) {
                // backup until we hit the fNames
                for (int j = i; j >= 0; --j) {
                    if (rec[j].fNames != NULL) {
                        return SkFontHost::CreateTypeface(NULL,
                                    rec[j].fNames[0], (SkTypeface::Style)style);
                    }
                }
            }
        }
    }
    return NULL;
}

/**
 * Use the current system locale (language and region) to open the best matching
 * customization. For example, when the language is Japanese, the sequence might be:
 *      /system/etc/fallback_fonts-ja-JP.xml
 *      /system/etc/fallback_fonts-ja.xml
 *      /system/etc/fallback_fonts.xml
 */
FILE* openLocalizedFile(const char* origname) {
    FILE* file = 0;
    SkString basename;
    SkString filename;
    AndroidLocale locale;

    basename.set(origname);
    // Remove the .xml suffix. We'll add it back in a moment.
    if (basename.endsWith(".xml")) {
        basename.resize(basename.size()-4);
    }
    getLocale(locale);
    // Try first with language and region
    filename.printf("%s-%s-%s.xml", basename.c_str(), locale.language, locale.region);
    file = fopen(filename.c_str(), "r");
    if (!file) {
        // If not found, try next with just language
        filename.printf("%s-%s.xml", basename.c_str(), locale.language);
        file = fopen(filename.c_str(), "r");

        if (!file) {
            // If still not found, try just the original name
            file = fopen(origname, "r");
        }
    }
    return file;
}

bool SkCLImageDiffer::loadKernelStream(SkStream* stream, const char name[], cl_kernel* kernel) {
    // Read the kernel source into memory
    SkString sourceString;
    sourceString.resize(stream->getLength());
    size_t bytesRead = stream->read(sourceString.writable_str(), sourceString.size());
    if (bytesRead != sourceString.size()) {
        SkDebugf("Failed to read kernel source file");
        return false;
    }

    return loadKernelSource(sourceString.c_str(), name, kernel);
}

void SkXMLWriter::addAttributeLen(const char name[], const char value[], size_t length) {
    SkString valueStr;

    if (fDoEscapeMarkup) {
        size_t   extra = escape_markup(nullptr, value, length);
        if (extra) {
            valueStr.resize(length + extra);
            (void)escape_markup(valueStr.writable_str(), value, length);
            value = valueStr.c_str();
            length += extra;
        }
    }
    this->onAddAttributeLen(name, value, length);
}

void SkDebugCanvas::outputScalar(SkScalar num) {
    if (num == (int) num) {
        fClipStackData.appendf("%d", (int) num);
    } else {
        SkString str;
        str.printf("%1.9g", num);
        int width = (int) str.size();
        const char* cStr = str.c_str();
        while (cStr[width - 1] == '0') {
            --width;
        }
        str.resize(width);
        fClipStackData.appendf("%sf", str.c_str());
    }
}

static void output_scalar(SkScalar num) {
    if (num == (int) num) {
        SkDebugf("%d", (int) num);
    } else {
        SkString str;
        str.printf("%1.9g", num);
        int width = (int) str.size();
        const char* cStr = str.c_str();
        while (cStr[width - 1] == '0') {
            --width;
        }
        str.resize(width);
        SkDebugf("%sf", str.c_str());
    }
}