diff options
Diffstat (limited to 'base/stdpre.h')
| -rw-r--r-- | base/stdpre.h | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/base/stdpre.h b/base/stdpre.h index 5dd068d9..84b4e40e 100644 --- a/base/stdpre.h +++ b/base/stdpre.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2001-2019 Artifex Software, Inc. +/* Copyright (C) 2001-2020 Artifex Software, Inc. All Rights Reserved. This software is provided AS-IS with no warranty, either express or @@ -42,11 +42,13 @@ typedef struct gp_file_s gp_file; * Here we deal with the vagaries of various C compilers. We assume that: * ANSI-standard Unix compilers define __STDC__. * gcc defines __GNUC__. - * Borland Turbo C and Turbo C++ define __MSDOS__ and __TURBOC__. - * Borland C++ defines __BORLANDC__, __MSDOS__, and __TURBOC__. * Microsoft C/C++ defines _MSC_VER and _MSDOS. + * + * The following are compilers we no longer support: * Watcom C defines __WATCOMC__ and MSDOS. * MetroWerks C defines __MWERKS__. + * Borland Turbo C and Turbo C++ define __MSDOS__ and __TURBOC__. + * Borland C++ defines __BORLANDC__, __MSDOS__, and __TURBOC__. * * We arrange to define __MSDOS__ on all the MS-DOS platforms. */ @@ -378,18 +380,12 @@ typedef int bool; /* * Define the type to be used for ordering pointers (<, >=, etc.). - * The Borland and Microsoft large models only compare the offset part - * of segmented pointers. Semantically, the right type to use for the - * comparison is char huge *, but we have no idea how expensive comparing - * such pointers is, and any type that compares all the bits of the pointer, - * gives the right result for pointers in the same segment, and keeps - * different segments disjoint will do. + * This used to have 'unsigned long' for comparison of segment+offset, + * but that hasn't been an issue for YEARS. The old version was not + * compatible with 64-bit. */ -#if defined(__TURBOC__) || defined(_MSC_VER) -typedef unsigned long ptr_ord_t; -#else typedef const char *ptr_ord_t; -#endif + /* Define all the pointer comparison operations. */ #define _PTR_CMP(p1, rel, p2) ((ptr_ord_t)(p1) rel (ptr_ord_t)(p2)) #define PTR_LE(p1, p2) _PTR_CMP(p1, <=, p2) |