GLSL reserves identifiers beginning with "gl_" or containing "__", but
we haven't been consistent about enforcing this rule. This patch
makes a new function to check whether identifier names are valid. In
the process it closes a loophole where we would previously allow
function argument names to contain "__".
---
src/glsl/ast_to_hir.cpp | 65 ++++++++++++++++++++++++-------------------------
1 file changed, 32 insertions(+), 33 deletions(-)
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index c1e3c08..f4f81e0 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -2649,6 +2649,36 @@ handle_geometry_shader_input_decl(struct
_mesa_glsl_parse_state *state,
}
}
+
+void
+check_valid_identifier(const char *identifier, YYLTYPE loc,
+ struct _mesa_glsl_parse_state *state)
+{
+ /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
+ *
+ * "Identifiers starting with "gl_" are reserved for use by
+ * OpenGL, and may not be declared in a shader as either a
+ * variable or a function."
+ */
+ if (strncmp(identifier, "gl_", 3) == 0)
+ _mesa_glsl_error(&loc, state,
+ "identifier `%s' uses reserved `gl_' prefix",
+ identifier);
+ else if (strstr(identifier, "__")) {
+ /* From page 14 (page 20 of the PDF) of the GLSL 1.10
+ * spec:
+ *
+ * "In addition, all identifiers containing two
+ * consecutive underscores (__) are reserved as
+ * possible future keywords."
+ */
+ _mesa_glsl_error(&loc, state,
+ "identifier `%s' uses reserved `__' string",
+ identifier);
+ }
+}
+
+
ir_rvalue *
ast_declarator_list::hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
@@ -3243,28 +3273,7 @@ ast_declarator_list::hir(exec_list *instructions,
* created for the declaration should be added to the IR stream.
*/
if (earlier == NULL) {
- /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
- *
- * "Identifiers starting with "gl_" are reserved for use by
- * OpenGL, and may not be declared in a shader as either a
- * variable or a function."
- */
- if (strncmp(decl->identifier, "gl_", 3) == 0)
- _mesa_glsl_error(& loc, state,
- "identifier `%s' uses reserved `gl_' prefix",
- decl->identifier);
- else if (strstr(decl->identifier, "__")) {
- /* From page 14 (page 20 of the PDF) of the GLSL 1.10
- * spec:
- *
- * "In addition, all identifiers containing two
- * consecutive underscores (__) are reserved as
- * possible future keywords."
- */
- _mesa_glsl_error(& loc, state,
- "identifier `%s' uses reserved `__' string",
- decl->identifier);
- }
+ check_valid_identifier(decl->identifier, loc, state);
/* Add the variable to the symbol table. Note that the initializer's
* IR was already processed earlier (though it hasn't been emitted
@@ -3505,17 +3514,7 @@ ast_function::hir(exec_list *instructions,
"function body", name);
}
- /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
- *
- * "Identifiers starting with "gl_" are reserved for use by
- * OpenGL, and may not be declared in a shader as either a
- * variable or a function."
- */
- if (strncmp(name, "gl_", 3) == 0) {
- YYLTYPE loc = this->get_location();
- _mesa_glsl_error(&loc, state,
- "identifier `%s' uses reserved `gl_' prefix", name);
- }
+ check_valid_identifier(name, this->get_location(), state);
/* Convert the list of function parameters to HIR now so that they can be
* used below to compare this function's signature with previously seen
--
1.8.4
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