more const in format detection
BaseImporter::SearchFileHeaderForToken() expected a pointer to a non-const token list. This was probably an oversight, as nobody would realistically expect the function to change the list. Furthermore, it prevented token lists from being compiled to read-only memory, in some cases even causing the compiler to generate thread-safe initialization. The list is now const and all callers declare their token lists static const, thus compiling them to read-only memory.
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@@ -130,8 +130,8 @@ bool DXFImporter::CanRead( const std::string& filename, IOSystem* pIOHandler, bo
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}
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if ( extension.empty() || checkSig ) {
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const char *pTokens[] = { "SECTION", "HEADER", "ENDSEC", "BLOCKS" };
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return BaseImporter::SearchFileHeaderForToken(pIOHandler, filename, pTokens, 4, 32 );
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static const char * const pTokens[] = { "SECTION", "HEADER", "ENDSEC", "BLOCKS" };
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return SearchFileHeaderForToken(pIOHandler, filename, pTokens, 4, 32 );
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}
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return false;
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