Function validateAttr

tools/aapt/Resource.cpp:451–550

    ATTR_TRAILING_SPACES = -4
};
static int validateAttr(const String8& path, const ResTable& table,
        const ResXMLParser& parser,
        const char* ns, const char* attr, const char* validChars, bool required)
{
    size_t len;

    ssize_t index = parser.indexOfAttribute(ns, attr);
    const uint16_t* str;
    Res_value value;
    if (index >= 0 && parser.getAttributeValue(index, &value) >= 0) {
        const ResStringPool* pool = &parser.getStrings();
        if (value.dataType == Res_value::TYPE_REFERENCE) {
            uint32_t specFlags = 0;
            int strIdx;
            if ((strIdx=table.resolveReference(&value, 0x10000000, NULL, &specFlags)) < 0) {
                fprintf(stderr, "%s:%d: Tag <%s> attribute %s references unknown resid 0x%08x.\n",
                        path.string(), parser.getLineNumber(),
                        String8(parser.getElementName(&len)).string(), attr,
                        value.data);
                return ATTR_NOT_FOUND;
            }

            pool = table.getTableStringBlock(strIdx);
            #if 0
            if (pool != NULL) {
                str = pool->stringAt(value.data, &len);
            }
            printf("***** RES ATTR: %s specFlags=0x%x strIdx=%d: %s\n", attr,
                    specFlags, strIdx, str != NULL ? String8(str).string() : "???");
            #endif
            if ((specFlags&~ResTable_typeSpec::SPEC_PUBLIC) != 0 && false) {
                fprintf(stderr, "%s:%d: Tag <%s> attribute %s varies by configurations 0x%x.\n",
                        path.string(), parser.getLineNumber(),
                        String8(parser.getElementName(&len)).string(), attr,
                        specFlags);
                return ATTR_NOT_FOUND;
            }
        }
        if (value.dataType == Res_value::TYPE_STRING) {
            if (pool == NULL) {
                fprintf(stderr, "%s:%d: Tag <%s> attribute %s has no string block.\n",
                        path.string(), parser.getLineNumber(),
                        String8(parser.getElementName(&len)).string(), attr);
                return ATTR_NOT_FOUND;
            }
            if ((str=pool->stringAt(value.data, &len)) == NULL) {
                fprintf(stderr, "%s:%d: Tag <%s> attribute %s has corrupt string value.\n",
                        path.string(), parser.getLineNumber(),
                        String8(parser.getElementName(&len)).string(), attr);
                return ATTR_NOT_FOUND;
            }
        } else {
            fprintf(stderr, "%s:%d: Tag <%s> attribute %s has invalid type %d.\n",
                    path.string(), parser.getLineNumber(),
                    String8(parser.getElementName(&len)).string(), attr,
                    value.dataType);
            return ATTR_NOT_FOUND;
        }