embed: Implement ftello/fseeko variants to allow to deal with large files.

Author: Maxwell175

Embedded/np_embed.c

@@ -1,5 +1,5 @@
 #define NUITKAPYTHON_EMBED_BUILD
-
+#define _FILE_OFFSET_BITS=64
 #include "np_embed.h"
 #include <ctype.h>
 #include <stdarg.h>
@@ -522,25 +522,42 @@ NP_DECL(int) np_getc_unlocked(void* e) {
 }
 #endif
 
-NP_DECL(long int) np_ftell(void* e) {
+
+int64_t np_ftell_priv(void* e) {
   if (NP_FOREIGN_PTR) {
-    return ftell((FILE*)e);
+#ifdef _WIN32
+    return _ftelli64((FILE*)e);
+#else
+    return ftello((FILE*)e);
+#endif
   }
 
   if (((EFILE*)e)->handle_type != EHANDLE_VIRTUAL) {
-    return ftell(((EFILE*)e)->f);
+#ifdef _WIN32
+    return _ftelli64(((EFILE*)e)->f);
+#else
+    return ftello(((EFILE*)e)->f);
+#endif
   }
 
   return (((EFILE*)e)->end - ((EFILE*)e)->pos) - ((EFILE*)e)->size;
 }
 
-NP_DECL(int) np_fseek(void* e, long int offset, int origin) {
+int np_fseek_priv(void* e, int64_t offset, int origin) {
   if (NP_FOREIGN_PTR) {
-    return fseek((FILE*)e, offset, origin);
+#ifdef _WIN32
+    return _fseeki64((FILE*)e, offset, origin);
+#else
+    return fseeko((FILE*)e, offset, origin);
+#endif
   }
 
   if (((EFILE*)e)->handle_type != EHANDLE_VIRTUAL) {
-    return fseek(((EFILE*)e)->f, offset, origin);
+#ifdef _WIN32
+    return _fseeki64(((EFILE*)e)->f, offset, origin);
+#else
+    return fseeko(((EFILE*)e)->f, offset, origin);
+#endif
   }
 
   if(origin == SEEK_SET)
@@ -552,12 +569,28 @@ NP_DECL(int) np_fseek(void* e, long int offset, int origin) {
 
   if(((EFILE*)e)->end < ((EFILE*)e)->pos || np_ftell(e) < 0) {
     errno = EINVAL;
-    return true;
+    return -1;
   }
 
   return 0;
 }
 
+NP_DECL(long int) np_ftell(void* e) {
+  return np_ftell_priv(e);
+}
+
+NP_DECL(int) np_fseek(void* e, long int offset, int origin) {
+  return np_fseek_priv(e, offset, origin);
+}
+
+NP_DECL(int64_t) np_ftello64(void *e) {
+  return np_ftell_priv(e);
+}
+
+NP_DECL(int) np_fseeko64(void *e, int64_t offset, int origin) {
+  return np_fseek_priv(e, offset, origin);
+}
+
 NP_DECL(int) np_fscanf(void *e, const char *format, ...) {
   if (NP_FOREIGN_PTR) {
     va_list args;

Include/np_embed.h

@@ -112,6 +112,8 @@ NP_DECL(int) np_setvbuf(void *stream, char *buffer, int mode, size_t size);
 /* File Positioning */
 NP_DECL(int) np_fseek(void *stream, long int offset, int origin);
 NP_DECL(long int) np_ftell(void *stream);
+NP_DECL(int) np_fseeko64(void *stream, int64_t offset, int origin);
+NP_DECL(int64_t) np_ftello64(void *stream);
 NP_DECL(void) np_rewind(void *stream);
 NP_DECL(int) np_fsetpos(void *stream, const fpos_t *pos);
 NP_DECL(int) np_ungetc(int character, void *stream);
@@ -194,6 +196,18 @@ NP_DECL(int) np_ftrylockfile(void *e);
 #define _fseek np_fseek
 #define ftell np_ftell
 #define _ftell np_ftell
+#ifdef _WIN32
+#define _fseeki64 np_fseeko64
+#define _ftelli64 np_ftello64
+#else
+#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64
+#define fseeko np_fseeko64
+#define ftello np_ftello64
+#else
+#define fseeko np_fseek
+#define ftello np_ftell
+#endif
+#endif
 #define rewind np_rewind
 #define _rewind np_rewind
 #define fgetpos np_fgetpos