svg_loader SvgLoader: Fix memory leak of duplicate declared id

Duplicate declaration of id attribute is invaild.
We do not have a separate policy for invalid svg files.
Therefore, it is a priority to prevent crashes or memory leaks.
If an id is declared as duplicate, the last declared id is used.

diff --git a/src/loaders/svg/tvgSvgLoader.cpp b/src/loaders/svg/tvgSvgLoader.cpp
index 092c327..b120ca4 100644 (file)
--- a/src/loaders/svg/tvgSvgLoader.cpp
+++ b/src/loaders/svg/tvgSvgLoader.cpp
@@ -990,6 +990,7 @@ static bool _attrParseGNode(void* data, const char* key, const char* value)
     } else if (!strcmp(key, "transform")) {
         node->transform = _parseTransformationMatrix(value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else if (!strcmp(key, "clip-path")) {
         _handleClipPathAttr(loader, node, value);
@@ -1015,6 +1016,7 @@ static bool _attrParseClipPathNode(void* data, const char* key, const char* valu
     } else if (!strcmp(key, "transform")) {
         node->transform = _parseTransformationMatrix(value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else {
         return _parseStyleAttr(loader, key, value, false);
@@ -1033,6 +1035,7 @@ static bool _attrParseMaskNode(void* data, const char* key, const char* value)
     } else if (!strcmp(key, "transform")) {
         node->transform = _parseTransformationMatrix(value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else {
         return _parseStyleAttr(loader, key, value, false);
@@ -1175,6 +1178,7 @@ static bool _attrParsePathNode(void* data, const char* key, const char* value)
     } else if (!strcmp(key, "mask")) {
         _handleMaskAttr(loader, node, value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else {
         return _parseStyleAttr(loader, key, value, false);
@@ -1234,6 +1238,7 @@ static bool _attrParseCircleNode(void* data, const char* key, const char* value)
     } else if (!strcmp(key, "mask")) {
         _handleMaskAttr(loader, node, value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else {
         return _parseStyleAttr(loader, key, value, false);
@@ -1287,6 +1292,7 @@ static bool _attrParseEllipseNode(void* data, const char* key, const char* value
     }
 
     if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else if (!strcmp(key, "style")) {
         return simpleXmlParseW3CAttribute(value, _parseStyleAttr, loader);
@@ -1370,6 +1376,7 @@ static bool _attrParsePolygonNode(void* data, const char* key, const char* value
     } else if (!strcmp(key, "mask")) {
         _handleMaskAttr(loader, node, value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else {
         return _parseStyleAttr(loader, key, value, false);
@@ -1443,6 +1450,7 @@ static bool _attrParseRectNode(void* data, const char* key, const char* value)
     }
 
     if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else if (!strcmp(key, "style")) {
         ret = simpleXmlParseW3CAttribute(value, _parseStyleAttr, loader);
@@ -1505,6 +1513,7 @@ static bool _attrParseLineNode(void* data, const char* key, const char* value)
     }
 
     if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else if (!strcmp(key, "style")) {
         return simpleXmlParseW3CAttribute(value, _parseStyleAttr, loader);
@@ -1574,6 +1583,7 @@ static bool _attrParseImageNode(void* data, const char* key, const char* value)
     if (!strcmp(key, "href") || !strcmp(key, "xlink:href")) {
         image->href = _idFromHref(value);
     } else if (!strcmp(key, "id")) {
+        if (node->id && value) delete node->id;
         node->id = _copyId(value);
     } else if (!strcmp(key, "style")) {
         return simpleXmlParseW3CAttribute(value, _parseStyleAttr, loader);