dri/nouveau: don't use nested functions

It's a GNU extension that isn't supported by clang right now:
http://gcc.gnu.org/onlinedocs/gcc-4.6.3/gcc/Nested-Functions.html
http://clang.llvm.org/docs/UsersManual.html#c_unimpl_gcc

With this, clang now compiles the nouveau classic driver.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44061

(Types changed from e.g. 'unsigned char' to 'GLubyte' so that the types can
be concatenated to form a unique function name without any whitespace
interfering.)

[ Francisco Jerez: give meaningful names to the dispatch functions. ]

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_array.c b/src/mesa/drivers/dri/nouveau/nouveau_array.c
index 17e6d16..d9253b0 100644 (file)
--- a/src/mesa/drivers/dri/nouveau/nouveau_array.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_array.c
@@ -29,54 +29,71 @@
 #include "nouveau_array.h"
 #include "nouveau_bufferobj.h"
 
+#define EXTRACT(in_t, out_t) extract_func_##in_t##_to_##out_t
+
+#define EXTRACT_FUNC(in_t, out_t, k)                   \
+static out_t EXTRACT(in_t, out_t)                      \
+(struct nouveau_array *a, int i, int j) {              \
+       in_t x = ((in_t *)(a->buf + i * a->stride))[j]; \
+                                                       \
+       return (out_t)x / (k);                          \
+}
+
+EXTRACT_FUNC(GLchar, unsigned, 1);
+EXTRACT_FUNC(GLchar, float, SCHAR_MAX);
+EXTRACT_FUNC(GLubyte, unsigned, 1);
+EXTRACT_FUNC(GLubyte, float, UCHAR_MAX);
+EXTRACT_FUNC(GLshort, unsigned, 1);
+EXTRACT_FUNC(GLshort, float, SHRT_MAX);
+EXTRACT_FUNC(GLushort, unsigned, 1);
+EXTRACT_FUNC(GLushort, float, USHRT_MAX);
+EXTRACT_FUNC(GLint, unsigned, 1);
+EXTRACT_FUNC(GLint, float, INT_MAX);
+EXTRACT_FUNC(GLuint, unsigned, 1);
+EXTRACT_FUNC(GLuint, float, UINT_MAX);
+EXTRACT_FUNC(GLfloat, unsigned, 1.0 / UINT_MAX);
+EXTRACT_FUNC(GLfloat, float, 1);
+
+#undef EXTRACT_FUNC
+
 static void
 get_array_extract(struct nouveau_array *a, extract_u_t *extract_u,
                  extract_f_t *extract_f)
 {
-#define EXTRACT(in_t, out_t, k)                                                \
-       ({                                                              \
-               auto out_t f(struct nouveau_array *, int, int);         \
-               out_t f(struct nouveau_array *a, int i, int j) {        \
-                       in_t x = ((in_t *)(a->buf + i * a->stride))[j]; \
-                                                                       \
-                       return (out_t)x / (k);                          \
-               };                                                      \
-               f;                                                      \
-       });
-
        switch (a->type) {
        case GL_BYTE:
-               *extract_u = EXTRACT(char, unsigned, 1);
-               *extract_f = EXTRACT(char, float, SCHAR_MAX);
+               *extract_u = EXTRACT(GLchar, unsigned);
+               *extract_f = EXTRACT(GLchar, float);
                break;
        case GL_UNSIGNED_BYTE:
-               *extract_u = EXTRACT(unsigned char, unsigned, 1);
-               *extract_f = EXTRACT(unsigned char, float, UCHAR_MAX);
+               *extract_u = EXTRACT(GLubyte, unsigned);
+               *extract_f = EXTRACT(GLubyte, float);
                break;
        case GL_SHORT:
-               *extract_u = EXTRACT(short, unsigned, 1);
-               *extract_f = EXTRACT(short, float, SHRT_MAX);
+               *extract_u = EXTRACT(GLshort, unsigned);
+               *extract_f = EXTRACT(GLshort, float);
                break;
        case GL_UNSIGNED_SHORT:
-               *extract_u = EXTRACT(unsigned short, unsigned, 1);
-               *extract_f = EXTRACT(unsigned short, float, USHRT_MAX);
+               *extract_u = EXTRACT(GLushort, unsigned);
+               *extract_f = EXTRACT(GLushort, float);
                break;
        case GL_INT:
-               *extract_u = EXTRACT(int, unsigned, 1);
-               *extract_f = EXTRACT(int, float, INT_MAX);
+               *extract_u = EXTRACT(GLint, unsigned);
+               *extract_f = EXTRACT(GLint, float);
                break;
        case GL_UNSIGNED_INT:
-               *extract_u = EXTRACT(unsigned int, unsigned, 1);
-               *extract_f = EXTRACT(unsigned int, float, UINT_MAX);
+               *extract_u = EXTRACT(GLuint, unsigned);
+               *extract_f = EXTRACT(GLuint, float);
                break;
        case GL_FLOAT:
-               *extract_u = EXTRACT(float, unsigned, 1.0 / UINT_MAX);
-               *extract_f = EXTRACT(float, float, 1);
+               *extract_u = EXTRACT(GLfloat, unsigned);
+               *extract_f = EXTRACT(GLfloat, float);
                break;
        default:
                assert(0);
        }
 }
+#undef EXTRACT
 
 void
 nouveau_init_array(struct nouveau_array *a, int attr, int stride,

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_render_t.c b/src/mesa/drivers/dri/nouveau/nouveau_render_t.c
index e0cf727..2afc9fa 100644 (file)
--- a/src/mesa/drivers/dri/nouveau/nouveau_render_t.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_render_t.c
@@ -97,52 +97,49 @@
                }                                                       \
        } while (0)
 
-/*
- * Select an appropriate dispatch function for the given index buffer.
- */
-static dispatch_t
-get_array_dispatch(struct nouveau_array *a)
+static void
+dispatch_l(struct gl_context *ctx, unsigned int start, int delta,
+          unsigned int n)
 {
-       if (!a->fields) {
-               auto void f(struct gl_context *, unsigned int, int, unsigned int);
-
-               void f(struct gl_context *ctx, unsigned int start, int delta,
-                      unsigned int n) {
-                       struct nouveau_channel *chan = context_chan(ctx);
-                       RENDER_LOCALS(ctx);
+       struct nouveau_channel *chan = context_chan(ctx);
+       RENDER_LOCALS(ctx);
 
-                       EMIT_VBO(L, ctx, start, delta, n);
-               };
-
-               return f;
-
-       } else if (a->type == GL_UNSIGNED_INT) {
-               auto void f(struct gl_context *, unsigned int, int, unsigned int);
-
-               void f(struct gl_context *ctx, unsigned int start, int delta,
-                      unsigned int n) {
-                       struct nouveau_channel *chan = context_chan(ctx);
-                       RENDER_LOCALS(ctx);
-
-                       EMIT_VBO(I32, ctx, start, delta, n);
-               };
+       EMIT_VBO(L, ctx, start, delta, n);
+}
 
-               return f;
+static void
+dispatch_i32(struct gl_context *ctx, unsigned int start, int delta,
+            unsigned int n)
+{
+       struct nouveau_channel *chan = context_chan(ctx);
+       RENDER_LOCALS(ctx);
 
-       } else {
-               auto void f(struct gl_context *, unsigned int, int, unsigned int);
+       EMIT_VBO(I32, ctx, start, delta, n);
+}
 
-               void f(struct gl_context *ctx, unsigned int start, int delta,
-                      unsigned int n) {
-                       struct nouveau_channel *chan = context_chan(ctx);
-                       RENDER_LOCALS(ctx);
+static void
+dispatch_i16(struct gl_context *ctx, unsigned int start, int delta,
+            unsigned int n)
+{
+       struct nouveau_channel *chan = context_chan(ctx);
+       RENDER_LOCALS(ctx);
 
-                       EMIT_VBO(I32, ctx, start, delta, n & 1);
-                       EMIT_VBO(I16, ctx, start, delta, n & ~1);
-               };
+       EMIT_VBO(I32, ctx, start, delta, n & 1);
+       EMIT_VBO(I16, ctx, start, delta, n & ~1);
+}
 
-               return f;
-       }
+/*
+ * Select an appropriate dispatch function for the given index buffer.
+ */
+static dispatch_t
+get_array_dispatch(struct nouveau_array *a)
+{
+       if (!a->fields)
+               return dispatch_l;
+       else if (a->type == GL_UNSIGNED_INT)
+               return dispatch_i32;
+       else
+               return dispatch_i16;
 }
 
 /*