spectools: use a callback in EbmlCallbacks to validate the size of an element

So it can be checked even before the element is created.

Author: robUx4

spectool/schema_2_kaxsemantic_cpp.xsl

@@ -59,6 +59,17 @@ static constexpr const MatroskaProfile VERSION_MATROSKA_UP_TO_V2 = {false, false
 static constexpr const MatroskaProfile VERSION_MATROSKA_UP_TO_V3 = {false, false, 0, 3};
 // available since version 1, 2, 3 and 4 of Matroska and WebM but not DivX
 static constexpr const MatroskaProfile VERSION_WEBM_UP_TO_V4 = {true, false, 0, 4};
+
+static inline bool ValidateBinary4(std::uint64_t Size)
+{
+  return Size == 4;
+}
+
+static inline bool ValidateBinary16(std::uint64_t Size)
+{
+  return Size == 16;
+}
+
 <xsl:for-each select="ebml:element[not(starts-with(@path,'\EBML\'))]">
     <!-- sorting messes the detection of the previous element MATROSKA_VERSION state -->
     <!-- Maybe for each output we create we also create a counterpart call to check if the new MATROSKA_VERSION state that should be used -->
@@ -176,6 +187,13 @@ static constexpr const MatroskaProfile VERSION_WEBM_UP_TO_V4 = {true, false, 0,
                 <xsl:call-template name="output-display-name">
                     <xsl:with-param name="node" select="."/>
                 </xsl:call-template>
+                <xsl:choose>
+                    <xsl:when test="@length=4"><xsl:text>, ValidateBinary4</xsl:text></xsl:when>
+                    <xsl:when test="@length=16"><xsl:text>, ValidateBinary16</xsl:text></xsl:when>
+                    <xsl:when test="@name='Block' or @name='SimpleBlock' or @name='BlockVirtual'"><xsl:text>, KaxInternalBlock::SizeIsValid</xsl:text></xsl:when>
+                    <xsl:when test="not(@length)"><xsl:text>, libebml::EbmlCallbacks::AnySizeValid</xsl:text></xsl:when>
+                    <xsl:otherwise><xsl:text>, false</xsl:text></xsl:otherwise>
+                </xsl:choose>
                 <xsl:call-template name="output-minmax">
                     <xsl:with-param name="node" select="."/>
                 </xsl:call-template>

spectool/schema_2_kaxsemantic_h.xsl

@@ -67,7 +67,6 @@ namespace libmatroska {
             </xsl:when>
             <xsl:when test="@type='binary'">
                 <xsl:text>DECLARE_MKX_BINARY</xsl:text>
-                <xsl:if test="@length"><xsl:text>_LENGTH</xsl:text></xsl:if>
             </xsl:when>
             <xsl:when test="@type='uinteger'">
                 <xsl:text>DECLARE_MKX_UINTEGER</xsl:text>
@@ -98,9 +97,6 @@ namespace libmatroska {
         <xsl:call-template name="get-class-name">
             <xsl:with-param name="node" select="."/>
         </xsl:call-template>
-        <xsl:if test="@length">
-            <xsl:text>, </xsl:text><xsl:value-of select="@length"/>
-        </xsl:if>
         <xsl:text>)&#10;</xsl:text>
         <xsl:if test="@maxver='0' or @maxver='1' or @maxver='2' or @maxver='3'">
             <xsl:text>public:&#10;</xsl:text>