[build] Put integer type definitions into `integer-types.h'.

Refactor some of the `ftconfig.h' headers and template to move the
definition of the FreeType integer types (e.g., `FT_Int16') to a
common header file `freetype/config/integer-types.h'.

* builds/unix/ftconfig.h.in, builds/vms/ftconfig.h,
include/freetype/config/ftconfig.h: Split off integer type
definition stuff to...
* include/freetype/config/integer-types.h: ...this new file.

* builds/unix/ftconfig.h.in: Control the definition of
`FT_SIZEOF_INT' and `FT_SIZEOF_LONG' with macro
`FT_USE_AUTOCONF_SIZEOF_TYPES'.  If these are not defined, auto
detection happens in `integer-types.h' as usual based on `INTXX_MAX'
values.  Otherwise the autoconf-detected values are used.

* builds/unix/configure.raw (CPPFLAGS): Don't include path to
`config' directory.  Instead, ...
(FT_CONFIG_STANDARD_LIBRARY_H): Use complete path.

6 files changed, 292 insertions, 685 deletions

diff --git a/ChangeLog b/ChangeLog
index c8b136e90..cb08944c5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,28 @@
 2020-07-05  David Turner  <david@freetype.org>
 
+	[build] Put integer type definitions into `integer-types.h'.
+
+	Refactor some of the `ftconfig.h' headers and template to move the
+	definition of the FreeType integer types (e.g., `FT_Int16') to a
+	common header file `freetype/config/integer-types.h'.
+
+	* builds/unix/ftconfig.h.in, builds/vms/ftconfig.h,
+	include/freetype/config/ftconfig.h: Split off integer type
+	definition stuff to...
+	* include/freetype/config/integer-types.h: ...this new file.
+
+	* builds/unix/ftconfig.h.in: Control the definition of
+	`FT_SIZEOF_INT' and `FT_SIZEOF_LONG' with macro
+	`FT_USE_AUTOCONF_SIZEOF_TYPES'.  If these are not defined, auto
+	detection happens in `integer-types.h' as usual based on `INTXX_MAX'
+	values.  Otherwise the autoconf-detected values are used.
+
+	* builds/unix/configure.raw (CPPFLAGS): Don't include path to
+	`config' directory.  Instead, ...
+	(FT_CONFIG_STANDARD_LIBRARY_H): Use complete path.
+
+2020-07-05  David Turner  <david@freetype.org>
+
 	[build] Rename `build/unix/ftconfig.in' to `ftconfig.h.in'.
 
 	Since we are no longer limited to 8.3 file names, it is simpler to
diff --git a/builds/unix/configure.raw b/builds/unix/configure.raw
index 615d5f893..87cb86317 100644
--- a/builds/unix/configure.raw
+++ b/builds/unix/configure.raw
@@ -113,7 +113,7 @@ AC_TYPE_LONG_LONG_INT
 
 AC_MSG_CHECKING([whether cpp computation of bit length in ftconfig.h.in works])
 orig_CPPFLAGS="${CPPFLAGS}"
-CPPFLAGS="-I${srcdir} -I. -I${srcdir}/../../include/freetype/config ${CPPFLAGS}"
+CPPFLAGS="-I${srcdir} -I. -I${srcdir}/../../include ${CPPFLAGS}"
 
 ac_clean_files=
 if test ! -f ft2build.h; then
@@ -124,7 +124,7 @@ fi
 cat > conftest.c <<\_ACEOF
 #include <limits.h>
 #define FT_CONFIG_OPTIONS_H "ftoption.h"
-#define FT_CONFIG_STANDARD_LIBRARY_H "ftstdlib.h"
+#define FT_CONFIG_STANDARD_LIBRARY_H <freetype/config/ftstdlib.h>
 #define FT_UINT_MAX  UINT_MAX
 #define FT_ULONG_MAX ULONG_MAX
 #include "ftconfig.h.in"
diff --git a/builds/unix/ftconfig.h.in b/builds/unix/ftconfig.h.in
index a8c7d8acd..c506ba278 100644
--- a/builds/unix/ftconfig.h.in
+++ b/builds/unix/ftconfig.h.in
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- * ftconfig.in
+ * ftconfig.h.in
  *
  *   UNIX-specific configuration file (specification only).
  *
@@ -39,6 +39,18 @@
 #include FT_CONFIG_OPTIONS_H
 #include FT_CONFIG_STANDARD_LIBRARY_H
 
+#undef FT_USE_AUTOCONF_SIZEOF_TYPES
+#ifdef FT_USE_AUTOCONF_SIZEOF_TYPES
+
+#undef SIZEOF_INT
+#undef SIZEOF_LONG
+#define FT_SIZEOF_INT  SIZEOF_INT
+#define FT_SIZEOF_LONG SIZEOF_LONG
+
+#endif /* FT_USE_AUTOCONF_SIZEOF_TYPES */
+
+#include <freetype/config/integer-types.h>
+
 
 FT_BEGIN_HEADER
 
@@ -57,60 +69,6 @@ FT_BEGIN_HEADER
 #undef HAVE_UNISTD_H
 #undef HAVE_FCNTL_H
 
-  /* There are systems (like the Texas Instruments 'C54x) where a `char`  */
-  /* has 16~bits.  ANSI~C says that `sizeof(char)` is always~1.  Since an */
-  /* `int` has 16~bits also for this system, `sizeof(int)` gives~1 which  */
-  /* is probably unexpected.                                              */
-  /*                                                                      */
-  /* `CHAR_BIT` (defined in `limits.h`) gives the number of bits in a     */
-  /* `char` type.                                                         */
-
-#ifndef FT_CHAR_BIT
-#define FT_CHAR_BIT  CHAR_BIT
-#endif
-
-
-#undef FT_USE_AUTOCONF_SIZEOF_TYPES
-#ifdef FT_USE_AUTOCONF_SIZEOF_TYPES
-
-#undef SIZEOF_INT
-#undef SIZEOF_LONG
-#define FT_SIZEOF_INT  SIZEOF_INT
-#define FT_SIZEOF_LONG SIZEOF_LONG
-
-#else /* !FT_USE_AUTOCONF_SIZEOF_TYPES */
-
-  /* Following cpp computation of the bit length of `int` and `long` */
-  /* is copied from default `include/freetype/config/ftconfig.h`.    */
-  /* If any improvement is required for this file, it should be      */
-  /* applied to the original header file for the builders that do    */
-  /* not use configure script.                                       */
-
-  /* The size of an `int` type. */
-#if                                 FT_UINT_MAX == 0xFFFFUL
-#define FT_SIZEOF_INT  ( 16 / FT_CHAR_BIT )
-#elif                               FT_UINT_MAX == 0xFFFFFFFFUL
-#define FT_SIZEOF_INT  ( 32 / FT_CHAR_BIT )
-#elif FT_UINT_MAX > 0xFFFFFFFFUL && FT_UINT_MAX == 0xFFFFFFFFFFFFFFFFUL
-#define FT_SIZEOF_INT  ( 64 / FT_CHAR_BIT )
-#else
-#error "Unsupported size of `int' type!"
-#endif
-
-  /* The size of a `long` type.  A five-byte `long` (as used e.g. on the */
-  /* DM642) is recognized but avoided.                                   */
-#if                                  FT_ULONG_MAX == 0xFFFFFFFFUL
-#define FT_SIZEOF_LONG  ( 32 / FT_CHAR_BIT )
-#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFUL
-#define FT_SIZEOF_LONG  ( 32 / FT_CHAR_BIT )
-#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFFFFFFFUL
-#define FT_SIZEOF_LONG  ( 64 / FT_CHAR_BIT )
-#else
-#error "Unsupported size of `long' type!"
-#endif
-
-#endif /* !FT_USE_AUTOCONF_SIZEOF_TYPES */
-
   /* `FT_UNUSED` indicates that a given parameter is not used --   */
   /* this is only used to get rid of unpleasant compiler warnings. */
 #ifndef FT_UNUSED
@@ -146,7 +104,7 @@ FT_BEGIN_HEADER
 #endif
 #if defined( __LP64__ ) && \
     ( MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4 )
-/undef FT_MACINTOSH
+#undef FT_MACINTOSH
 #endif
 
 #elif defined( __SC__ ) || defined( __MRC__ )
@@ -166,199 +124,6 @@ FT_BEGIN_HEADER
 #endif
 #endif
 
-
-  /**************************************************************************
-   *
-   * @section:
-   *   basic_types
-   *
-   */
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int16
-   *
-   * @description:
-   *   A typedef for a 16bit signed integer type.
-   */
-  typedef signed short  FT_Int16;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt16
-   *
-   * @description:
-   *   A typedef for a 16bit unsigned integer type.
-   */
-  typedef unsigned short  FT_UInt16;
-
-  /* */
-
-
-  /* this #if 0 ... #endif clause is for documentation purposes */
-#if 0
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int32
-   *
-   * @description:
-   *   A typedef for a 32bit signed integer type.  The size depends on the
-   *   configuration.
-   */
-  typedef signed XXX  FT_Int32;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt32
-   *
-   *   A typedef for a 32bit unsigned integer type.  The size depends on the
-   *   configuration.
-   */
-  typedef unsigned XXX  FT_UInt32;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int64
-   *
-   *   A typedef for a 64bit signed integer type.  The size depends on the
-   *   configuration.  Only defined if there is real 64bit support;
-   *   otherwise, it gets emulated with a structure (if necessary).
-   */
-  typedef signed XXX  FT_Int64;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt64
-   *
-   *   A typedef for a 64bit unsigned integer type.  The size depends on the
-   *   configuration.  Only defined if there is real 64bit support;
-   *   otherwise, it gets emulated with a structure (if necessary).
-   */
-  typedef unsigned XXX  FT_UInt64;
-
-  /* */
-
-#endif
-
-#if FT_SIZEOF_INT == 4
-
-  typedef signed int      FT_Int32;
-  typedef unsigned int    FT_UInt32;
-
-#elif FT_SIZEOF_LONG == 4
-
-  typedef signed long     FT_Int32;
-  typedef unsigned long   FT_UInt32;
-
-#else
-#error "no 32bit type found -- please check your configuration files"
-#endif
-
-
-  /* look up an integer type that is at least 32~bits */
-#if FT_SIZEOF_INT >= 4
-
-  typedef int            FT_Fast;
-  typedef unsigned int   FT_UFast;
-
-#elif FT_SIZEOF_LONG >= 4
-
-  typedef long           FT_Fast;
-  typedef unsigned long  FT_UFast;
-
-#endif
-
-
-  /* determine whether we have a 64-bit `int` type for platforms without */
-  /* Autoconf                                                            */
-#if FT_SIZEOF_LONG == 8
-
-  /* `FT_LONG64` must be defined if a 64-bit type is available */
-#define FT_LONG64
-#define FT_INT64   long
-#define FT_UINT64  unsigned long
-
-  /* we handle the LLP64 scheme separately for GCC and clang, */
-  /* suppressing the `long long` warning                      */
-#elif ( FT_SIZEOF_LONG == 4 )       && \
-      defined( HAVE_LONG_LONG_INT ) && \
-      defined( __GNUC__ )
-#pragma GCC diagnostic ignored "-Wlong-long"
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-  /**************************************************************************
-   *
-   * A 64-bit data type may create compilation problems if you compile in
-   * strict ANSI mode.  To avoid them, we disable other 64-bit data types if
-   * `__STDC__` is defined.  You can however ignore this rule by defining the
-   * `FT_CONFIG_OPTION_FORCE_INT64` configuration macro.
-   */
-#elif !defined( __STDC__ ) || defined( FT_CONFIG_OPTION_FORCE_INT64 )
-
-#if defined( __STDC_VERSION__ ) && __STDC_VERSION__ >= 199901L
-
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#elif defined( _MSC_VER ) && _MSC_VER >= 900 /* Visual C++ (and Intel C++) */
-
-  /* this compiler provides the `__int64` type */
-#define FT_LONG64
-#define FT_INT64   __int64
-#define FT_UINT64  unsigned __int64
-
-#elif defined( __BORLANDC__ )  /* Borland C++ */
-
-  /* XXXX: We should probably check the value of `__BORLANDC__` in order */
-  /*       to test the compiler version.                                 */
-
-  /* this compiler provides the `__int64` type */
-#define FT_LONG64
-#define FT_INT64   __int64
-#define FT_UINT64  unsigned __int64
-
-#elif defined( __WATCOMC__ )   /* Watcom C++ */
-
-  /* Watcom doesn't provide 64-bit data types */
-
-#elif defined( __MWERKS__ )    /* Metrowerks CodeWarrior */
-
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#elif defined( __GNUC__ )
-
-  /* GCC provides the `long long` type */
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#endif /* __STDC_VERSION__ >= 199901L */
-
-#endif /* FT_SIZEOF_LONG == 8 */
-
-#ifdef FT_LONG64
-  typedef FT_INT64   FT_Int64;
-  typedef FT_UINT64  FT_UInt64;
-#endif
-
-
 #ifdef _WIN64
   /* only 64bit Windows uses the LLP64 data model, i.e., */
   /* 32bit integers, 64bit pointers                      */
diff --git a/builds/vms/ftconfig.h b/builds/vms/ftconfig.h
index d9165e5f6..ed426870e 100644
--- a/builds/vms/ftconfig.h
+++ b/builds/vms/ftconfig.h
@@ -39,9 +39,15 @@
 #include FT_CONFIG_OPTIONS_H
 #include FT_CONFIG_STANDARD_LIBRARY_H
 
+#define SIZEOF_INT   4
+#define SIZEOF_LONG  4
 
-FT_BEGIN_HEADER
+#define FT_SIZEOF_INT   4
+#define FT_SIZEOF_LONG  4
+
+#include <freetype/config/integer-types.h>
 
+FT_BEGIN_HEADER
 
   /**************************************************************************
    *
@@ -57,13 +63,6 @@ FT_BEGIN_HEADER
 #define HAVE_UNISTD_H  1
 #define HAVE_FCNTL_H   1
 
-#define SIZEOF_INT   4
-#define SIZEOF_LONG  4
-
-#define FT_SIZEOF_INT   4
-#define FT_SIZEOF_LONG  4
-
-
   /* `FT_UNUSED` indicates that a given parameter is not used --   */
   /* this is only used to get rid of unpleasant compiler warnings. */
 #ifndef FT_UNUSED
@@ -119,199 +118,6 @@ FT_BEGIN_HEADER
 #endif
 #endif
 
-
-  /**************************************************************************
-   *
-   * @section:
-   *   basic_types
-   *
-   */
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int16
-   *
-   * @description:
-   *   A typedef for a 16bit signed integer type.
-   */
-  typedef signed short  FT_Int16;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt16
-   *
-   * @description:
-   *   A typedef for a 16bit unsigned integer type.
-   */
-  typedef unsigned short  FT_UInt16;
-
-  /* */
-
-
-  /* this #if 0 ... #endif clause is for documentation purposes */
-#if 0
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int32
-   *
-   * @description:
-   *   A typedef for a 32bit signed integer type.  The size depends on the
-   *   configuration.
-   */
-  typedef signed XXX  FT_Int32;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt32
-   *
-   *   A typedef for a 32bit unsigned integer type.  The size depends on the
-   *   configuration.
-   */
-  typedef unsigned XXX  FT_UInt32;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int64
-   *
-   *   A typedef for a 64bit signed integer type.  The size depends on the
-   *   configuration.  Only defined if there is real 64bit support;
-   *   otherwise, it gets emulated with a structure (if necessary).
-   */
-  typedef signed XXX  FT_Int64;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt64
-   *
-   *   A typedef for a 64bit unsigned integer type.  The size depends on the
-   *   configuration.  Only defined if there is real 64bit support;
-   *   otherwise, it gets emulated with a structure (if necessary).
-   */
-  typedef unsigned XXX  FT_UInt64;
-
-  /* */
-
-#endif
-
-#if FT_SIZEOF_INT == 4
-
-  typedef signed int      FT_Int32;
-  typedef unsigned int    FT_UInt32;
-
-#elif FT_SIZEOF_LONG == 4
-
-  typedef signed long     FT_Int32;
-  typedef unsigned long   FT_UInt32;
-
-#else
-#error "no 32bit type found -- please check your configuration files"
-#endif
-
-
-  /* look up an integer type that is at least 32~bits */
-#if FT_SIZEOF_INT >= 4
-
-  typedef int            FT_Fast;
-  typedef unsigned int   FT_UFast;
-
-#elif FT_SIZEOF_LONG >= 4
-
-  typedef long           FT_Fast;
-  typedef unsigned long  FT_UFast;
-
-#endif
-
-
-  /* determine whether we have a 64-bit `int` type for platforms without */
-  /* Autoconf                                                            */
-#if FT_SIZEOF_LONG == 8
-
-  /* `FT_LONG64` must be defined if a 64-bit type is available */
-#define FT_LONG64
-#define FT_INT64   long
-#define FT_UINT64  unsigned long
-
-  /* we handle the LLP64 scheme separately for GCC and clang, */
-  /* suppressing the `long long` warning                      */
-#elif ( FT_SIZEOF_LONG == 4 )       && \
-      defined( HAVE_LONG_LONG_INT ) && \
-      defined( __GNUC__ )
-#pragma GCC diagnostic ignored "-Wlong-long"
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-  /**************************************************************************
-   *
-   * A 64-bit data type may create compilation problems if you compile in
-   * strict ANSI mode.  To avoid them, we disable other 64-bit data types if
-   * `__STDC__` is defined.  You can however ignore this rule by defining the
-   * `FT_CONFIG_OPTION_FORCE_INT64` configuration macro.
-   */
-#elif !defined( __STDC__ ) || defined( FT_CONFIG_OPTION_FORCE_INT64 )
-
-#if defined( __STDC_VERSION__ ) && __STDC_VERSION__ >= 199901L
-
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#elif defined( _MSC_VER ) && _MSC_VER >= 900 /* Visual C++ (and Intel C++) */
-
-  /* this compiler provides the `__int64` type */
-#define FT_LONG64
-#define FT_INT64   __int64
-#define FT_UINT64  unsigned __int64
-
-#elif defined( __BORLANDC__ )  /* Borland C++ */
-
-  /* XXXX: We should probably check the value of `__BORLANDC__` in order */
-  /*       to test the compiler version.                                 */
-
-  /* this compiler provides the `__int64` type */
-#define FT_LONG64
-#define FT_INT64   __int64
-#define FT_UINT64  unsigned __int64
-
-#elif defined( __WATCOMC__ )   /* Watcom C++ */
-
-  /* Watcom doesn't provide 64-bit data types */
-
-#elif defined( __MWERKS__ )    /* Metrowerks CodeWarrior */
-
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#elif defined( __GNUC__ )
-
-  /* GCC provides the `long long` type */
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#endif /* __STDC_VERSION__ >= 199901L */
-
-#endif /* FT_SIZEOF_LONG == 8 */
-
-#ifdef FT_LONG64
-  typedef FT_INT64   FT_Int64;
-  typedef FT_UINT64  FT_UInt64;
-#endif
-
-
 #ifdef _WIN64
   /* only 64bit Windows uses the LLP64 data model, i.e., */
   /* 32bit integers, 64bit pointers                      */
diff --git a/include/freetype/config/ftconfig.h b/include/freetype/config/ftconfig.h
index 14eecefc2..72fbf360e 100644
--- a/include/freetype/config/ftconfig.h
+++ b/include/freetype/config/ftconfig.h
@@ -41,59 +41,10 @@
 #include FT_CONFIG_OPTIONS_H
 #include FT_CONFIG_STANDARD_LIBRARY_H
 
+#include <freetype/config/integer-types.h>
 
 FT_BEGIN_HEADER
 
-
-  /**************************************************************************
-   *
-   *              PLATFORM-SPECIFIC CONFIGURATION MACROS
-   *
-   * These macros can be toggled to suit a specific system.  The current ones
-   * are defaults used to compile FreeType in an ANSI C environment (16bit
-   * compilers are also supported).  Copy this file to your own
-   * `builds/<system>` directory, and edit it to port the engine.
-   *
-   */
-
-
-  /* There are systems (like the Texas Instruments 'C54x) where a `char`  */
-  /* has 16~bits.  ANSI~C says that `sizeof(char)` is always~1.  Since an */
-  /* `int` has 16~bits also for this system, `sizeof(int)` gives~1 which  */
-  /* is probably unexpected.                                              */
-  /*                                                                      */
-  /* `CHAR_BIT` (defined in `limits.h`) gives the number of bits in a     */
-  /* `char` type.                                                         */
-
-#ifndef FT_CHAR_BIT
-#define FT_CHAR_BIT  CHAR_BIT
-#endif
-
-
-  /* The size of an `int` type. */
-#if                                 FT_UINT_MAX == 0xFFFFUL
-#define FT_SIZEOF_INT  ( 16 / FT_CHAR_BIT )
-#elif                               FT_UINT_MAX == 0xFFFFFFFFUL
-#define FT_SIZEOF_INT  ( 32 / FT_CHAR_BIT )
-#elif FT_UINT_MAX > 0xFFFFFFFFUL && FT_UINT_MAX == 0xFFFFFFFFFFFFFFFFUL
-#define FT_SIZEOF_INT  ( 64 / FT_CHAR_BIT )
-#else
-#error "Unsupported size of `int' type!"
-#endif
-
-  /* The size of a `long` type.  A five-byte `long` (as used e.g. on the */
-  /* DM642) is recognized but avoided.                                   */
-#if                                  FT_ULONG_MAX == 0xFFFFFFFFUL
-#define FT_SIZEOF_LONG  ( 32 / FT_CHAR_BIT )
-#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFUL
-#define FT_SIZEOF_LONG  ( 32 / FT_CHAR_BIT )
-#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFFFFFFFUL
-#define FT_SIZEOF_LONG  ( 64 / FT_CHAR_BIT )
-#else
-#error "Unsupported size of `long' type!"
-#endif
-
-
   /* `FT_UNUSED` indicates that a given parameter is not used --   */
   /* this is only used to get rid of unpleasant compiler warnings. */
 #ifndef FT_UNUSED
@@ -149,189 +100,6 @@ FT_BEGIN_HEADER
 #endif
 #endif
 
-
-  /**************************************************************************
-   *
-   * @section:
-   *   basic_types
-   *
-   */
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int16
-   *
-   * @description:
-   *   A typedef for a 16bit signed integer type.
-   */
-  typedef signed short  FT_Int16;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt16
-   *
-   * @description:
-   *   A typedef for a 16bit unsigned integer type.
-   */
-  typedef unsigned short  FT_UInt16;
-
-  /* */
-
-
-  /* this #if 0 ... #endif clause is for documentation purposes */
-#if 0
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int32
-   *
-   * @description:
-   *   A typedef for a 32bit signed integer type.  The size depends on the
-   *   configuration.
-   */
-  typedef signed XXX  FT_Int32;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt32
-   *
-   *   A typedef for a 32bit unsigned integer type.  The size depends on the
-   *   configuration.
-   */
-  typedef unsigned XXX  FT_UInt32;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_Int64
-   *
-   *   A typedef for a 64bit signed integer type.  The size depends on the
-   *   configuration.  Only defined if there is real 64bit support;
-   *   otherwise, it gets emulated with a structure (if necessary).
-   */
-  typedef signed XXX  FT_Int64;
-
-
-  /**************************************************************************
-   *
-   * @type:
-   *   FT_UInt64
-   *
-   *   A typedef for a 64bit unsigned integer type.  The size depends on the
-   *   configuration.  Only defined if there is real 64bit support;
-   *   otherwise, it gets emulated with a structure (if necessary).
-   */
-  typedef unsigned XXX  FT_UInt64;
-
-  /* */
-
-#endif
-
-#if FT_SIZEOF_INT == ( 32 / FT_CHAR_BIT )
-
-  typedef signed int      FT_Int32;
-  typedef unsigned int    FT_UInt32;
-
-#elif FT_SIZEOF_LONG == ( 32 / FT_CHAR_BIT )
-
-  typedef signed long     FT_Int32;
-  typedef unsigned long   FT_UInt32;
-
-#else
-#error "no 32bit type found -- please check your configuration files"
-#endif
-
-
-  /* look up an integer type that is at least 32~bits */
-#if FT_SIZEOF_INT >= ( 32 / FT_CHAR_BIT )
-
-  typedef int            FT_Fast;
-  typedef unsigned int   FT_UFast;
-
-#elif FT_SIZEOF_LONG >= ( 32 / FT_CHAR_BIT )
-
-  typedef long           FT_Fast;
-  typedef unsigned long  FT_UFast;
-
-#endif
-
-
-  /* determine whether we have a 64-bit `int` type for platforms without */
-  /* Autoconf                                                            */
-#if FT_SIZEOF_LONG == ( 64 / FT_CHAR_BIT )
-
-  /* `FT_LONG64` must be defined if a 64-bit type is available */
-#define FT_LONG64
-#define FT_INT64   long
-#define FT_UINT64  unsigned long
-
-  /**************************************************************************
-   *
-   * A 64-bit data type may create compilation problems if you compile in
-   * strict ANSI mode.  To avoid them, we disable other 64-bit data types if
-   * `__STDC__` is defined.  You can however ignore this rule by defining the
-   * `FT_CONFIG_OPTION_FORCE_INT64` configuration macro.
-   */
-#elif !defined( __STDC__ ) || defined( FT_CONFIG_OPTION_FORCE_INT64 )
-
-#if defined( __STDC_VERSION__ ) && __STDC_VERSION__ >= 199901L
-
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#elif defined( _MSC_VER ) && _MSC_VER >= 900 /* Visual C++ (and Intel C++) */
-
-  /* this compiler provides the `__int64` type */
-#define FT_LONG64
-#define FT_INT64   __int64
-#define FT_UINT64  unsigned __int64
-
-#elif defined( __BORLANDC__ )  /* Borland C++ */
-
-  /* XXXX: We should probably check the value of `__BORLANDC__` in order */
-  /*       to test the compiler version.                                 */
-
-  /* this compiler provides the `__int64` type */
-#define FT_LONG64
-#define FT_INT64   __int64
-#define FT_UINT64  unsigned __int64
-
-#elif defined( __WATCOMC__ )   /* Watcom C++ */
-
-  /* Watcom doesn't provide 64-bit data types */
-
-#elif defined( __MWERKS__ )    /* Metrowerks CodeWarrior */
-
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#elif defined( __GNUC__ )
-
-  /* GCC provides the `long long` type */
-#define FT_LONG64
-#define FT_INT64   long long int
-#define FT_UINT64  unsigned long long int
-
-#endif /* __STDC_VERSION__ >= 199901L */
-
-#endif /* FT_SIZEOF_LONG == (64 / FT_CHAR_BIT) */
-
-#ifdef FT_LONG64
-  typedef FT_INT64   FT_Int64;
-  typedef FT_UINT64  FT_UInt64;
-#endif
-
-
 #ifdef _WIN64
   /* only 64bit Windows uses the LLP64 data model, i.e., */
   /* 32bit integers, 64bit pointers                      */
diff --git a/include/freetype/config/integer-types.h b/include/freetype/config/integer-types.h
new file mode 100644
index 000000000..a0ca0c95e
--- /dev/null
+++ b/include/freetype/config/integer-types.h
@@ -0,0 +1,245 @@
+/****************************************************************************
+ *
+ * config/integer-types.h
+ *
+ *   FreeType integer types definitions.
+ *
+ * Copyright (C) 1996-2020 by
+ * David Turner, Robert Wilhelm, and Werner Lemberg.
+ *
+ * This file is part of the FreeType project, and may only be used,
+ * modified, and distributed under the terms of the FreeType project
+ * license, LICENSE.TXT.  By continuing to use, modify, or distribute
+ * this file you indicate that you have read the license and
+ * understand and accept it fully.
+ *
+ */
+#ifndef FREETYPE_CONFIG_INTEGER_TYPES_H_
+#define FREETYPE_CONFIG_INTEGER_TYPES_H_
+
+  /* There are systems (like the Texas Instruments 'C54x) where a `char`  */
+  /* has 16~bits.  ANSI~C says that `sizeof(char)` is always~1.  Since an */
+  /* `int` has 16~bits also for this system, `sizeof(int)` gives~1 which  */
+  /* is probably unexpected.                                              */
+  /*                                                                      */
+  /* `CHAR_BIT` (defined in `limits.h`) gives the number of bits in a     */
+  /* `char` type.                                                         */
+
+#ifndef FT_CHAR_BIT
+#define FT_CHAR_BIT  CHAR_BIT
+#endif
+
+#ifndef FT_SIZEOF_INT
+
+  /* The size of an `int` type. */
+#if                                 FT_UINT_MAX == 0xFFFFUL
+#define FT_SIZEOF_INT  ( 16 / FT_CHAR_BIT )
+#elif                               FT_UINT_MAX == 0xFFFFFFFFUL
+#define FT_SIZEOF_INT  ( 32 / FT_CHAR_BIT )
+#elif FT_UINT_MAX > 0xFFFFFFFFUL && FT_UINT_MAX == 0xFFFFFFFFFFFFFFFFUL
+#define FT_SIZEOF_INT  ( 64 / FT_CHAR_BIT )
+#else
+#error "Unsupported size of `int' type!"
+#endif
+
+#endif  /* !defined(FT_SIZEOF_INT) */
+
+#ifndef FT_SIZEOF_LONG
+
+  /* The size of a `long` type.  A five-byte `long` (as used e.g. on the */
+  /* DM642) is recognized but avoided.                                   */
+#if                                  FT_ULONG_MAX == 0xFFFFFFFFUL
+#define FT_SIZEOF_LONG  ( 32 / FT_CHAR_BIT )
+#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFUL
+#define FT_SIZEOF_LONG  ( 32 / FT_CHAR_BIT )
+#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFFFFFFFUL
+#define FT_SIZEOF_LONG  ( 64 / FT_CHAR_BIT )
+#else
+#error "Unsupported size of `long' type!"
+#endif
+
+#endif /* !defined(FT_SIZEOF_LONG) */
+
+  /**************************************************************************
+   *
+   * @section:
+   *   basic_types
+   *
+   */
+
+
+  /**************************************************************************
+   *
+   * @type:
+   *   FT_Int16
+   *
+   * @description:
+   *   A typedef for a 16bit signed integer type.
+   */
+  typedef signed short  FT_Int16;
+
+
+  /**************************************************************************
+   *
+   * @type:
+   *   FT_UInt16
+   *
+   * @description:
+   *   A typedef for a 16bit unsigned integer type.
+   */
+  typedef unsigned short  FT_UInt16;
+
+  /* */
+
+
+  /* this #if 0 ... #endif clause is for documentation purposes */
+#if 0
+
+  /**************************************************************************
+   *
+   * @type:
+   *   FT_Int32
+   *
+   * @description:
+   *   A typedef for a 32bit signed integer type.  The size depends on the
+   *   configuration.
+   */
+  typedef signed XXX  FT_Int32;
+
+
+  /**************************************************************************
+   *
+   * @type:
+   *   FT_UInt32
+   *
+   *   A typedef for a 32bit unsigned integer type.  The size depends on the
+   *   configuration.
+   */
+  typedef unsigned XXX  FT_UInt32;
+
+
+  /**************************************************************************
+   *
+   * @type:
+   *   FT_Int64
+   *
+   *   A typedef for a 64bit signed integer type.  The size depends on the
+   *   configuration.  Only defined if there is real 64bit support;
+   *   otherwise, it gets emulated with a structure (if necessary).
+   */
+  typedef signed XXX  FT_Int64;
+
+
+  /**************************************************************************
+   *
+   * @type:
+   *   FT_UInt64
+   *
+   *   A typedef for a 64bit unsigned integer type.  The size depends on the
+   *   configuration.  Only defined if there is real 64bit support;
+   *   otherwise, it gets emulated with a structure (if necessary).
+   */
+  typedef unsigned XXX  FT_UInt64;
+
+  /* */
+
+#endif
+
+#if FT_SIZEOF_INT == ( 32 / FT_CHAR_BIT )
+
+  typedef signed int      FT_Int32;
+  typedef unsigned int    FT_UInt32;
+
+#elif FT_SIZEOF_LONG == ( 32 / FT_CHAR_BIT )
+
+  typedef signed long     FT_Int32;
+  typedef unsigned long   FT_UInt32;
+
+#else
+#error "no 32bit type found -- please check your configuration files"
+#endif
+
+
+  /* look up an integer type that is at least 32~bits */
+#if FT_SIZEOF_INT >= ( 32 / FT_CHAR_BIT )
+
+  typedef int            FT_Fast;
+  typedef unsigned int   FT_UFast;
+
+#elif FT_SIZEOF_LONG >= ( 32 / FT_CHAR_BIT )
+
+  typedef long           FT_Fast;
+  typedef unsigned long  FT_UFast;
+
+#endif
+
+
+  /* determine whether we have a 64-bit `int` type for platforms without */
+  /* Autoconf                                                            */
+#if FT_SIZEOF_LONG == ( 64 / FT_CHAR_BIT )
+
+  /* `FT_LONG64` must be defined if a 64-bit type is available */
+#define FT_LONG64
+#define FT_INT64   long
+#define FT_UINT64  unsigned long
+
+  /**************************************************************************
+   *
+   * A 64-bit data type may create compilation problems if you compile in
+   * strict ANSI mode.  To avoid them, we disable other 64-bit data types if
+   * `__STDC__` is defined.  You can however ignore this rule by defining the
+   * `FT_CONFIG_OPTION_FORCE_INT64` configuration macro.
+   */
+#elif !defined( __STDC__ ) || defined( FT_CONFIG_OPTION_FORCE_INT64 )
+
+#if defined( __STDC_VERSION__ ) && __STDC_VERSION__ >= 199901L
+
+#define FT_LONG64
+#define FT_INT64   long long int
+#define FT_UINT64  unsigned long long int
+
+#elif defined( _MSC_VER ) && _MSC_VER >= 900 /* Visual C++ (and Intel C++) */
+
+  /* this compiler provides the `__int64` type */
+#define FT_LONG64
+#define FT_INT64   __int64
+#define FT_UINT64  unsigned __int64
+
+#elif defined( __BORLANDC__ )  /* Borland C++ */
+
+  /* XXXX: We should probably check the value of `__BORLANDC__` in order */
+  /*       to test the compiler version.                                 */
+
+  /* this compiler provides the `__int64` type */
+#define FT_LONG64
+#define FT_INT64   __int64
+#define FT_UINT64  unsigned __int64
+
+#elif defined( __WATCOMC__ )   /* Watcom C++ */
+
+  /* Watcom doesn't provide 64-bit data types */
+
+#elif defined( __MWERKS__ )    /* Metrowerks CodeWarrior */
+
+#define FT_LONG64
+#define FT_INT64   long long int
+#define FT_UINT64  unsigned long long int
+
+#elif defined( __GNUC__ )
+
+  /* GCC provides the `long long` type */
+#define FT_LONG64
+#define FT_INT64   long long int
+#define FT_UINT64  unsigned long long int
+
+#endif /* __STDC_VERSION__ >= 199901L */
+
+#endif /* FT_SIZEOF_LONG == (64 / FT_CHAR_BIT) */
+
+#ifdef FT_LONG64
+  typedef FT_INT64   FT_Int64;
+  typedef FT_UINT64  FT_UInt64;
+#endif
+
+
+#endif  /* FREETYPE_CONFIG_INTEGER_TYPES_H_ */