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VRML file parser fixes. 

* Fix coverity scan error for array comparison.
* Check for buffer length overflow that fixes segfault.
This commit is contained in:
Mark Roszko 2015-02-19 19:21:34 -05:00 committed by Wayne Stambaugh
parent 04c55f0956
commit 6c7744e286
4 changed files with 40 additions and 38 deletions
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10
3d-viewer/vrml_aux.cpp
View File

@ -94,13 +94,13 @@ static int SkipGetChar( FILE* File )
}
char* GetNextTag( FILE* File, char* tag )
bool GetNextTag( FILE* File, char* tag, size_t len )
{
int c = SkipGetChar( File );
if( c == EOF )
{
return NULL;
return false;
}
tag[0] = c;
@ -109,9 +109,10 @@ char* GetNextTag( FILE* File, char* tag )
// DBG( printf( "tag[0] %c\n", tag[0] ) );
if( (c != '}') && (c != ']') )
{
len--;
char* dst = &tag[1];
while( fscanf( File, "%c", dst ) )
while( fscanf( File, "%c", dst ) && len > 0 )
{
if( (*dst == ' ') || (*dst == '[') || (*dst == '{')
|| (*dst == '\t') || (*dst == '\n')|| (*dst == '\r') )
@ -121,6 +122,7 @@ char* GetNextTag( FILE* File, char* tag )
}
dst++;
len--;
}
@ -134,7 +136,7 @@ char* GetNextTag( FILE* File, char* tag )
}
}
return tag;
return true;
}

2
3d-viewer/vrml_aux.h
View File

@ -52,6 +52,6 @@ int read_NotImplemented( FILE* File, char closeChar);
int parseVertexList( FILE* File, std::vector< glm::vec3 > &dst_vector);
int parseVertex( FILE* File, glm::vec3 &dst_vertex );
int parseFloat( FILE* File, float *dst_float );
char* GetNextTag( FILE* File, char* tag );
bool GetNextTag( FILE* File, char* tag, size_t len );
#endif

10
3d-viewer/vrml_v1_modelparser.cpp
View File

@ -88,7 +88,7 @@ void VRML1_MODEL_PARSER::Load( const wxString& aFilename, double aVrmlunits_to_3
childs.clear();
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( ( *text == '}' ) || ( *text == ']' ) )
{
@ -123,7 +123,7 @@ int VRML1_MODEL_PARSER::read_separator()
// DBG( printf( "Separator\n" ) );
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( strcmp( text, "Material" ) == 0 )
{
@ -182,7 +182,7 @@ int VRML1_MODEL_PARSER::readMaterial()
m_model->m_Materials = material;
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -230,7 +230,7 @@ int VRML1_MODEL_PARSER::readCoordinate3()
// DBG( printf( " readCoordinate3\n" ) );
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -258,7 +258,7 @@ int VRML1_MODEL_PARSER::readIndexedFaceSet()
// DBG( printf( " readIndexedFaceSet\n" ) );
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{

56
3d-viewer/vrml_v2_modelparser.cpp
View File

@ -99,7 +99,7 @@ void VRML2_MODEL_PARSER::Load( const wxString& aFilename, double aVrmlunits_to_3
childs.clear();
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( ( *text == '}' ) || ( *text == ']' ) )
{
@ -138,7 +138,7 @@ int VRML2_MODEL_PARSER::read_Transform()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -257,15 +257,15 @@ int VRML2_MODEL_PARSER::read_DEF_Coordinate()
char text[128];
// Get the name of the definition.
GetNextTag( m_file, text );
GetNextTag( m_file, text, sizeof(text) );
std::string coordinateName = text;
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( ( text == NULL ) || ( *text == ']' ) )
if( *text == ']' )
continue;
if( ( *text == '}' ) )
if( *text == '}' )
return 0;
if( strcmp( text, "Coordinate" ) == 0 )
@ -287,9 +287,9 @@ int VRML2_MODEL_PARSER::read_DEF()
{
char text[128];
GetNextTag( m_file, text );
GetNextTag( m_file, text, sizeof(text) );
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -344,7 +344,7 @@ int VRML2_MODEL_PARSER::read_USE()
char text[128];
// Get the name of the definition.
GetNextTag( m_file, text );
GetNextTag( m_file, text, sizeof(text) );
std::string coordinateName = text;
// Look for it in our coordinate map.
@ -368,7 +368,7 @@ int VRML2_MODEL_PARSER::read_Shape()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -418,7 +418,7 @@ int VRML2_MODEL_PARSER::read_Appearance()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -446,7 +446,7 @@ int VRML2_MODEL_PARSER::read_material()
S3D_MATERIAL* material = NULL;
char text[128];
if( GetNextTag( m_file, text ) )
if( GetNextTag( m_file, text, sizeof(text) ) )
{
if( strcmp( text, "Material" ) == 0 )
{
@ -462,7 +462,7 @@ int VRML2_MODEL_PARSER::read_material()
}
else if( strcmp( text, "DEF" ) == 0 )
{
if( GetNextTag( m_file, text ) )
if( GetNextTag( m_file, text, sizeof(text) ) )
{
wxString mat_name;
mat_name = FROM_UTF8( text );
@ -471,7 +471,7 @@ int VRML2_MODEL_PARSER::read_material()
GetMaster()->Insert( material );
m_model->m_Materials = material;
if( GetNextTag( m_file, text ) )
if( GetNextTag( m_file, text, sizeof(text) ) )
{
if( strcmp( text, "Material" ) == 0 )
{
@ -482,7 +482,7 @@ int VRML2_MODEL_PARSER::read_material()
}
else if( strcmp( text, "USE" ) == 0 )
{
if( GetNextTag( m_file, text ) )
if( GetNextTag( m_file, text, sizeof(text) ) )
{
wxString mat_name;
mat_name = FROM_UTF8( text );
@ -511,7 +511,7 @@ int VRML2_MODEL_PARSER::read_Material()
char text[128];
glm::vec3 vertex;
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -593,7 +593,7 @@ int VRML2_MODEL_PARSER::read_IndexedFaceSet()
m_normalPerVertex = false;
colorPerVertex = false;
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -607,7 +607,7 @@ int VRML2_MODEL_PARSER::read_IndexedFaceSet()
if( strcmp( text, "normalPerVertex" ) == 0 )
{
if( GetNextTag( m_file, text ) )
if( GetNextTag( m_file, text, sizeof(text) ) )
{
if( strcmp( text, "TRUE" ) == 0 )
{
@ -617,7 +617,7 @@ int VRML2_MODEL_PARSER::read_IndexedFaceSet()
}
else if( strcmp( text, "colorPerVertex" ) == 0 )
{
GetNextTag( m_file, text );
GetNextTag( m_file, text, sizeof(text) );
if( strcmp( text, "TRUE" ) )
{
@ -667,12 +667,12 @@ int VRML2_MODEL_PARSER::read_IndexedLineSet()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( ( text == NULL ) || ( *text == ']' ) )
if( *text == ']' )
continue;
if( ( *text == '}' ) )
if( *text == '}' )
return 0;
if( strcmp( text, "Coordinate" ) == 0 )
@ -783,7 +783,7 @@ int VRML2_MODEL_PARSER::read_Color()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -810,7 +810,7 @@ int VRML2_MODEL_PARSER::read_Normal()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -843,7 +843,7 @@ int VRML2_MODEL_PARSER::read_Coordinate()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( *text == ']' )
{
@ -872,12 +872,12 @@ int VRML2_MODEL_PARSER::read_CoordinateDef()
{
char text[128];
while( GetNextTag( m_file, text ) )
while( GetNextTag( m_file, text, sizeof(text) ) )
{
if( ( text == NULL ) || ( *text == ']' ) )
if( *text == ']' )
continue;
if( ( *text == '}' ) )
if( *text == '}' )
return 0;
if( strcmp( text, "point" ) == 0 )