/* NetHack 3.7 integer.h $NHDT-Date: 1720397754 2024/07/08 00:15:54 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.13 $ */

/* Copyright (c) 2016 by Michael Allison */

/* NetHack may be freely redistributed. See license for details. */

/* integer.h -- provide sized integer types

*

* We try to sort out a way to provide sized integer types

* in here. The strong preference is to try to let a

* compiler-supplied header file set up the types.

*

* If your compiler is C99 conforming and sets a value of

* __STDC_VERSION__ >= 199901L, then <stdint.h> is supposed

* to be available for inclusion.

*

* If your compiler doesn't set __STDC_VERSION__ to indicate

* full conformance to C99, but does actually supply a suitable

* <stdint.h>, you can pass a compiler flag -DHAS_STDINT_H

* during build to cause the inclusion of <stdint.h> anyway.

*

* If <stdint.h> doesn't get included, then the code in the

* STDINT_WORKAROUND section of code is not skipped and will

* be used to set up the types.

*

* We acknowledge that some ongoing maintenance may be needed

* over time if people send us code updates for making the

* determination of whether <stdint.h> is available, or

* require adjustments to the base type used for some

* compiler/platform combinations.

*

*/

#ifndef INTEGER_H

#define INTEGER_H

/* DEC C (aka Compaq C for a while, HP C these days) for VMS is

classified as a freestanding implementation rather than a hosted one

and even though it claims to be C99, it does not provide <stdint.h>. */

#if defined(__DECC) && defined(VMS) && !defined(HAS_STDINT_H)

#define HAS_INTTYPES_H

#else /*!__DECC*/

#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \

&& !defined(HAS_STDINT_H)

/* The compiler claims to conform to C99. Use stdint.h */

#define HAS_STDINT_H

#endif

#if defined(__GNUC__) && defined(__INT64_MAX__) && !defined(HAS_STDINT_H)

#define HAS_STDINT_H

#endif

#endif /*?__DECC*/

#ifdef HAS_STDINT_H

#include <stdint.h>

#define SKIP_STDINT_WORKAROUND

#else /*!stdint*/

#ifdef HAS_INTTYPES_H

#include <inttypes.h>

#define SKIP_STDINT_WORKAROUND

#endif

#endif /*?stdint*/

#ifndef SKIP_STDINT_WORKAROUND /* !C99 */

/*

* STDINT_WORKAROUND section begins here

*/

typedef signed char int8_t;

typedef unsigned char uint8_t;

typedef short int16_t;

typedef unsigned short uint16_t;

#if defined(__WATCOMC__) && !defined(__386__)

/* Open Watcom providing a 16 bit build for MS-DOS or OS/2 */

/* int is 16 bits; use long for 32 bits */

typedef long int int32_t;

typedef unsigned long int uint32_t;

#else

/* Otherwise, assume either a 32- or 64-bit compiler */

/* long may be 64 bits; use int for 32 bits */

typedef int int32_t;

typedef unsigned int uint32_t;

#endif

/* The only place where nethack cares about 64-bit integers is in the

Isaac64 random number generator. If your environment can't support

64-bit integers, you should comment out USE_ISAAC64 in config.h so

that the previous RNG gets used instead. Then this file will be

inhibited and it won't matter what the int64_t and uint64_t lines are. */

typedef long long int int64_t;

typedef unsigned long long int uint64_t;

#endif /* !C99 */

/* Provide int8, uint8, int16, uint16, int32, uint32, int64 and uint64 */

typedef int8_t int8;

typedef uint8_t uint8;

typedef int16_t int16;

typedef uint16_t uint16;

typedef int32_t int32;

typedef uint32_t uint32;

typedef int64_t int64;

typedef uint64_t uint64;

/* for non-negative L, calculate L * 10 + D, avoiding signed overflow;

yields -1 if overflow would have happened;

assumes compiler will optimize the constants */

#define AppendLongDigit(L,D) \

(((L) < LONG_MAX / 10L \

|| ((L) == LONG_MAX / 10L && (D) <= LONG_MAX % 10L)) \

? (L) * 10L + (D) \

: -1L)

/* add a and b, return max long value if overflow would have occurred;

assumes that both a and b are non-negative; caller should apply

cast(s) to (long) in the arguments if any are needed */

#define nowrap_add(a,b) ((a) <= (LONG_MAX - (b)) ? ((a) + (b)) : LONG_MAX)

#endif /* INTEGER_H */