Port Mesa to build on a P64 platform (e.g., Win64). P64 platforms

use 64-bit pointers and 32-bit longs.  So, operations like casting pointers
to unsigned long and back to pointer won't work.  glheader.h now
includes files to define uintptr_t, which should instead be used for
this sort of operation.  It is an integer type that is the same size
as a pointer.

7 files changed, 26 insertions, 19 deletions

diff --git a/src/mesa/main/api_arrayelt.c b/src/mesa/main/api_arrayelt.c
index cb827c2ec9c..6a531aa2aad 100644
--- a/src/mesa/main/api_arrayelt.c
+++ b/src/mesa/main/api_arrayelt.c
@@ -989,7 +989,7 @@ void GLAPIENTRY _ae_loopback_array_elt( GLint elt )
    /* generic attributes */
    for (at = actx->attribs; at->func; at++) {
       const GLubyte *src = at->array->BufferObj->Data
-                         + (unsigned long) at->array->Ptr
+                         + (uintptr_t) at->array->Ptr
                          + elt * at->array->StrideB;
       at->func( at->index, src );
    }
@@ -997,7 +997,7 @@ void GLAPIENTRY _ae_loopback_array_elt( GLint elt )
    /* conventional arrays */
    for (aa = actx->arrays; aa->func ; aa++) {
       const GLubyte *src = aa->array->BufferObj->Data
-                         + (unsigned long) aa->array->Ptr
+                         + (uintptr_t) aa->array->Ptr
                          + elt * aa->array->StrideB;
       aa->func( src );
    }
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 07b2341ff7a..a1d4c0190a1 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -449,11 +449,11 @@ _mesa_validate_pbo_access(GLuint dimensions,
                               format, type, depth-1, height-1, width);
 
 
-   if ((const GLubyte *) start > (const GLubyte *) pack->BufferObj->Size) {
+   if ((const GLubyte *) start > (const GLubyte *)(uintptr_t) pack->BufferObj->Size) {
       /* This will catch negative values / wrap-around */
       return GL_FALSE;
    }
-   if ((const GLubyte *) end > (const GLubyte *) pack->BufferObj->Size) {
+   if ((const GLubyte *) end > (const GLubyte *)(uintptr_t) pack->BufferObj->Size) {
       /* Image read goes beyond end of buffer */
       return GL_FALSE;
    }
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 150492e7c30..8f6b554a478 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -31,7 +31,7 @@
 #include "mtypes.h"
 
 
-#define F(x) (int)(unsigned long)&(((struct gl_extensions *)0)->x)
+#define F(x) (int)(uintptr_t)&(((struct gl_extensions *)0)->x)
 #define ON GL_TRUE
 #define OFF GL_FALSE
 
@@ -489,7 +489,7 @@ _mesa_make_extension_string( GLcontext *ctx )
    for (i = 0 ; i < Elements(default_extensions) ; i++) {
       if (!default_extensions[i].flag_offset ||
           *(base + default_extensions[i].flag_offset)) {
-         extStrLen += _mesa_strlen(default_extensions[i].name) + 1;
+         extStrLen += (GLuint)_mesa_strlen(default_extensions[i].name) + 1;
       }
    }
    s = (GLubyte *) _mesa_malloc(extStrLen);
@@ -499,7 +499,7 @@ _mesa_make_extension_string( GLcontext *ctx )
    for (i = 0 ; i < Elements(default_extensions) ; i++) {
       if (!default_extensions[i].flag_offset ||
           *(base + default_extensions[i].flag_offset)) {
-         GLuint len = _mesa_strlen(default_extensions[i].name);
+         GLuint len = (GLuint)_mesa_strlen(default_extensions[i].name);
          _mesa_memcpy(s + extStrLen, default_extensions[i].name, len);
          extStrLen += len;
          s[extStrLen] = (GLubyte) ' ';
diff --git a/src/mesa/main/glheader.h b/src/mesa/main/glheader.h
index 7855fd63fa3..0b1c16d2444 100644
--- a/src/mesa/main/glheader.h
+++ b/src/mesa/main/glheader.h
@@ -76,6 +76,13 @@
 #endif
 
 
+/* Get typedefs for uintptr_t and friends */
+#if defined(_WIN32) && !defined(__WIN32__) && !defined(__CYGWIN__) && !defined(BUILD_FOR_SNAP)
+#include <BaseTsd.h>
+#else
+#include <inttypes.h>
+#endif
+
 #if defined(_WIN32) && !defined(__WIN32__) && !defined(__CYGWIN__) && !defined(BUILD_FOR_SNAP)
 #  define __WIN32__
 #  define finite _finite
@@ -117,7 +124,7 @@
  */
 /* compatibility guard so we don't need to change client code */
 #if defined(_WIN32) && !defined(_WINDEF_) && !defined(_WINDEF_H) && !defined(_GNU_H_WINDOWS32_BASE) && !defined(OPENSTEP) && !defined(__CYGWIN__) && !defined(BUILD_FOR_SNAP)
-typedef int (GLAPIENTRY *PROC)();
+typedef INT_PTR (GLAPIENTRY *PROC)();
 typedef unsigned long COLORREF;
 #endif
 
diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 50bc1510b1c..767cef59e2e 100644
--- a/src/mesa/main/imports.c
+++ b/src/mesa/main/imports.c
@@ -124,16 +124,16 @@ _mesa_free(void *ptr)
 void *
 _mesa_align_malloc(size_t bytes, unsigned long alignment)
 {
-   unsigned long ptr, buf;
+   uintptr_t ptr, buf;
 
    ASSERT( alignment > 0 );
 
-   ptr = (unsigned long) _mesa_malloc(bytes + alignment + sizeof(void *));
+   ptr = (uintptr_t) _mesa_malloc(bytes + alignment + sizeof(void *));
    if (!ptr)
       return NULL;
 
-   buf = (ptr + alignment + sizeof(void *)) & ~(unsigned long)(alignment - 1);
-   *(unsigned long *)(buf - sizeof(void *)) = ptr;
+   buf = (ptr + alignment + sizeof(void *)) & ~(uintptr_t)(alignment - 1);
+   *(uintptr_t *)(buf - sizeof(void *)) = ptr;
 
 #ifdef DEBUG
    /* mark the non-aligned area */
@@ -151,16 +151,16 @@ _mesa_align_malloc(size_t bytes, unsigned long alignment)
 void *
 _mesa_align_calloc(size_t bytes, unsigned long alignment)
 {
-   unsigned long ptr, buf;
+   uintptr_t ptr, buf;
 
    ASSERT( alignment > 0 );
 
-   ptr = (unsigned long) _mesa_calloc(bytes + alignment + sizeof(void *));
+   ptr = (uintptr_t) _mesa_calloc(bytes + alignment + sizeof(void *));
    if (!ptr)
       return NULL;
 
-   buf = (ptr + alignment + sizeof(void *)) & ~(unsigned long)(alignment - 1);
-   *(unsigned long *)(buf - sizeof(void *)) = ptr;
+   buf = (ptr + alignment + sizeof(void *)) & ~(uintptr_t)(alignment - 1);
+   *(uintptr_t *)(buf - sizeof(void *)) = ptr;
 
 #ifdef DEBUG
    /* mark the non-aligned area */
@@ -777,7 +777,7 @@ _mesa_strncmp( const char *s1, const char *s2, size_t n )
 char *
 _mesa_strdup( const char *s )
 {
-   int l = _mesa_strlen(s);
+   size_t l = _mesa_strlen(s);
    char *s2 = (char *) _mesa_malloc(l + 1);
    if (s2)
       _mesa_strcpy(s2, s);
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 5158bcd8b25..2ae1116f412 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -100,7 +100,7 @@ extern "C" {
  * this macro.
  * Both pointers/offsets are expressed in bytes.
  */
-#define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (unsigned long) (B) )
+#define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (uintptr_t) (B) )
 
 
 /**********************************************************************/
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index 02f2dbe69fe..e4c3f6651d6 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -2127,7 +2127,7 @@ _mesa_validate_pbo_compressed_teximage(GLcontext *ctx,
       return pixels;
    }
    if ((const GLubyte *) pixels + imageSize >
-       (const GLubyte *) packing->BufferObj->Size) {
+       (const GLubyte *)(uintptr_t) packing->BufferObj->Size) {
       /* out of bounds read! */
       _mesa_error(ctx, GL_INVALID_OPERATION, funcName, "(invalid PBO access");
       return NULL;