a patch from Bjørnar Luteberget for compatibility with MSVC

src/runtime/c/pgf/data.h

@@ -56,7 +56,7 @@ typedef struct {
 	PgfPatt patt;
 } PgfPattAs;
 
-typedef void PgfPattWild;
+typedef char PgfPattWild;
 
 typedef struct {
 	PgfPatt patt;
@@ -241,12 +241,15 @@ typedef struct PgfSymbolKP
 } PgfSymbolKP;
 
 typedef struct {
+	char nothing[0]; // Empty struct
 } PgfSymbolNE;
 
 typedef struct {
+	char nothing[0]; // Empty struct
 } PgfSymbolBIND;
 
 typedef struct {
+	char nothing[0]; // Empty struct
 } PgfSymbolCAPIT;
 
 typedef GuBuf PgfProductionIdx;

src/runtime/c/pgf/evaluator.c

@@ -437,7 +437,7 @@ pgf_evaluate_accum_init_flt(PgfReasoner* rs,
 					   rs->pool);
 	lit_flt->val = val;
 	accum->enter_stack_ptr = rs->enter_stack_ptr;
-	rs->enter_stack_ptr = ((void*)accum)-sizeof(void*)*2;
+	rs->enter_stack_ptr = ((char*)accum)-sizeof(char*)*2;
 	accum->consts = NULL;
 }
 

src/runtime/c/pgf/jit.c

@@ -5,7 +5,7 @@
 #include <pgf/reasoner.h>
 #include <pgf/reader.h>
 #include "lightning.h"
-#ifdef __MINGW32__
+#if defined(__MINGW32__) || defined(_MSC_VER)
 #include <malloc.h>
 #endif
 
@@ -43,7 +43,7 @@ typedef struct {
 #define JIT_VSTATE JIT_V1
 #define JIT_VCLOS  JIT_V2
 
-#if defined(__MINGW32__)
+#if defined(__MINGW32__) || defined(_MSC_VER)
 #include <windows.h>
 
 static int
@@ -71,7 +71,7 @@ pgf_jit_alloc_page(PgfReader* rdr)
 
 #if defined(ANDROID)
 	if ((page = memalign(page_size, page_size)) == NULL) {	
-#elif defined(__MINGW32__)
+#elif defined(__MINGW32__) || defined(_MSC_VER)
 	if ((page = malloc(page_size)) == NULL) {
 #else
 	if (posix_memalign(&page, page_size, page_size) != 0) {

src/runtime/c/pgf/linearizer.h

@@ -29,6 +29,7 @@ PgfCncTreeEnum*
 pgf_lzr_concretize(PgfConcr* concr, PgfExpr expr, GuExn* err, GuPool* pool);
 
 typedef struct {
+	char nothing[0]; // Empty struct
 } PgfLinNonExist;
 
 PgfCncTree

src/runtime/c/pgf/literals.c

@@ -334,7 +334,7 @@ pgf_match_name_lit(PgfLiteralCallback* self, PgfConcr* concr,
 	return ep;
 }
 
-PgfLiteralCallback pgf_nerc_literal_callback =
+PGF_API_DATA PgfLiteralCallback pgf_nerc_literal_callback =
   { pgf_match_name_lit, pgf_predict_empty } ;
 
 static void
@@ -419,7 +419,7 @@ pgf_match_unknown_lit(PgfLiteralCallback* self, PgfConcr* concr,
 	return ep;
 }
 
-PgfLiteralCallback pgf_unknown_literal_callback =
+PGF_API_DATA PgfLiteralCallback pgf_unknown_literal_callback =
   { pgf_match_unknown_lit, pgf_predict_empty } ;
 
 PgfCallbacksMap*

src/runtime/c/pgf/literals.h

@@ -1,13 +1,33 @@
 #ifndef PGF_LITERALS_H_
 #define PGF_LITERALS_H_
 
+// MSVC requires explicit export/import of
+// symbols in DLLs. CMake takes care of this
+// for functions, but not for data/variables.
+#if defined(_MSC_VER)
+#if defined(COMPILING_PGF)
+#define PGF_API_DATA_DECL __declspec(dllexport)
+#define PGF_API_DATA __declspec(dllexport)
+#else
+#define PGF_API_DATA_DECL __declspec(dllimport)
+#define PGF_API_DATA ERROR_NOT_COMPILING_LIBPGF
+#endif
+
+#else
+
+#define PGF_API_DATA_DECL extern
+#define PGF_API_DATA
+#endif
+// end MSVC workaround
+ 
+ 
 #include <pgf/data.h>
 
 // literal for named entities recognition
-extern PgfLiteralCallback pgf_nerc_literal_callback;
+PGF_API_DATA_DECL PgfLiteralCallback pgf_nerc_literal_callback;
 
 // literal for finding unknown words
-extern PgfLiteralCallback pgf_unknown_literal_callback;
+PGF_API_DATA_DECL PgfLiteralCallback pgf_unknown_literal_callback;
 
 PgfCCat*
 pgf_literal_cat(PgfConcr* concr, PgfLiteral lit);

src/runtime/c/pgf/reader.c

@@ -14,7 +14,7 @@
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
-#ifdef __MINGW32__
+#if defined(__MINGW32__) || defined(_MSC_VER)
 #include <malloc.h>
 #endif