Use <stdint.h> and <inttypes.h> for c.h integers.

Redefine our exact width types with standard C99 types and macros,
including int64_t, INT64_MAX, INT64_C(), PRId64 etc.  We were already
using <stdint.h> types in a few places.

One complication is that Windows' <inttypes.h> uses format strings like
"%I64d", "%I32", "%I" for PRI*64, PRI*32, PTR*PTR, instead of mapping to
other standardized format strings like "%lld" etc as seen on other known
systems.  Teach our snprintf.c to understand them.

This removes a lot of configure clutter, and should also allow 64-bit
numbers and other standard types to be used in localized messages
without casting.

Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/ME3P282MB3166F9D1F71F787929C0C7E7B6312%40ME3P282MB3166.AUSP282.PROD.OUTLOOK.COM

src/interfaces/ecpg/ecpglib/typename.c

@@ -131,11 +131,12 @@ sqlda_dynamic_type(Oid type, enum COMPAT_MODE compat)
 		case INTERVALOID:
 			return ECPGt_interval;
 		case INT8OID:
-#ifdef HAVE_LONG_LONG_INT_64
-			return ECPGt_long_long;
-#endif
-#ifdef HAVE_LONG_INT_64
+#if SIZEOF_LONG == 8
 			return ECPGt_long;
+#elif SIZEOF_LONG_LONG == 8
+			return ECPGt_long_long;
+#else
+#error "cannot find integer type of the same size as INT8OID"
 #endif
 			/* Unhandled types always return a string */
 		default:

src/interfaces/ecpg/include/ecpg_config.h.in

@@ -1,8 +1,8 @@
 /* Define to 1 to build client libraries as thread-safe code. */
 #define ENABLE_THREAD_SAFETY 1
 
-/* Define to 1 if `long int' works and is 64 bits. */
-#undef HAVE_LONG_INT_64
+/* The size of `long', as computed by sizeof. */
+#undef SIZEOF_LONG
 
-/* Define to 1 if `long long int' works and is 64 bits. */
-#undef HAVE_LONG_LONG_INT_64
+/* The size of `long long', as computed by sizeof. */
+#undef SIZEOF_LONG_LONG

src/interfaces/ecpg/include/meson.build

@@ -3,8 +3,8 @@
 ecpg_inc = include_directories('.')
 
 ecpg_conf_keys = [
-  'HAVE_LONG_INT_64',
-  'HAVE_LONG_LONG_INT_64',
+  'SIZEOF_LONG',
+  'SIZEOF_LONG_LONG',
 ]
 
 ecpg_conf_data = configuration_data()

src/interfaces/ecpg/include/pgtypes_interval.h

@@ -3,21 +3,17 @@
 #ifndef PGTYPES_INTERVAL
 #define PGTYPES_INTERVAL
 
+#include <stdint.h>
+
 #include <ecpg_config.h>
 #include <pgtypes.h>
 
 #ifndef C_H
 
-#ifdef HAVE_LONG_INT_64
-typedef long int int64;
-#elif defined(HAVE_LONG_LONG_INT_64)
-typedef long long int int64;
-#else
-/* neither HAVE_LONG_INT_64 nor HAVE_LONG_LONG_INT_64 */
-#error must have a working 64-bit integer datatype
-#endif
+typedef int64_t int64;
 
 #define HAVE_INT64_TIMESTAMP
+
 #endif							/* C_H */
 
 typedef struct

src/interfaces/ecpg/include/sqltypes.h

@@ -46,12 +46,14 @@
 #define SQLINTERVAL		ECPGt_interval
 #define SQLNCHAR	ECPGt_char
 #define SQLNVCHAR	ECPGt_char
-#ifdef HAVE_LONG_LONG_INT_64
+#if SIZEOF_LONG == 8
+#define SQLINT8		ECPGt_long
+#define SQLSERIAL8	ECPGt_long
+#elif SIZEOF_LONG_LONG == 8
 #define SQLINT8		ECPGt_long_long
 #define SQLSERIAL8	ECPGt_long_long
 #else
-#define SQLINT8		ECPGt_long
-#define SQLSERIAL8	ECPGt_long
+#error "cannot find integer type of the same size as SQLINT8"
 #endif
 
 #endif							/* ndef ECPG_SQLTYPES_H */

src/interfaces/ecpg/test/expected/compat_informix-sqlda.c

@@ -97,12 +97,14 @@ typedef struct sqlda_struct sqlda_t;
 #define SQLINTERVAL		ECPGt_interval
 #define SQLNCHAR	ECPGt_char
 #define SQLNVCHAR	ECPGt_char
-#ifdef HAVE_LONG_LONG_INT_64
+#if SIZEOF_LONG == 8
+#define SQLINT8		ECPGt_long
+#define SQLSERIAL8	ECPGt_long
+#elif SIZEOF_LONG_LONG == 8
 #define SQLINT8		ECPGt_long_long
 #define SQLSERIAL8	ECPGt_long_long
 #else
-#define SQLINT8		ECPGt_long
-#define SQLSERIAL8	ECPGt_long
+#error "cannot find integer type of the same size as SQLINT8"
 #endif
 
 #endif							/* ndef ECPG_SQLTYPES_H */