You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
4.1 KiB
135 lines
4.1 KiB
#ifndef LSIDEFS_DEFINED
|
|
#define LSIDEFS_DEFINED
|
|
|
|
/*
|
|
Disable non standard comment warning to allow "//" comments since such
|
|
comments are in the public headers.
|
|
*/
|
|
#pragma warning (disable : 4001)
|
|
|
|
/* For ICECAP builds turn off the static directive */
|
|
#ifdef ICECAP
|
|
#define static
|
|
#endif /* ICECAP */
|
|
|
|
/* Common utility macros shared by all of Line Services
|
|
*/
|
|
|
|
#include "lsdefs.h" /* Make external common defines visible internally */
|
|
|
|
/* ****************************************************************** */
|
|
/* Item #1: The Assert() family of macros.
|
|
*
|
|
* Assert() generates no code for non-debug builds.
|
|
* AssertSz() is like Assert(), but you specify a string to print.
|
|
* victork: AssertSz() is unaccessible
|
|
* AssertBool() validates that its parameter is either "1" or "0".
|
|
* AssertDo() checks the result of an expression that is ALWAYS
|
|
* compiled, even in non-debug builds.
|
|
* AssertErr asserts there is an error with displaying a string
|
|
* AssertImplies(a, b) checks that a implies b
|
|
*/
|
|
#ifdef DEBUG
|
|
|
|
void (WINAPI* pfnAssertFailed)(char*, char*, int);
|
|
#define AssertSz(f, sz) \
|
|
(void)( (f) || (pfnAssertFailed(sz, __FILE__, __LINE__), 0) )
|
|
#define AssertDo(f) Assert((f) != 0)
|
|
|
|
#else /* !DEBUG */
|
|
|
|
#define AssertSz(f, sz) (void)(0)
|
|
#define AssertDo(f) (f)
|
|
|
|
#endif /* DEBUG */
|
|
|
|
#define AssertEx(f) AssertSz((f), "!(" #f ")")
|
|
#define AssertBool(f) AssertSz(((f) | 1) == 1, "boolean not zero or one");
|
|
/* use AssertBool(fFoo) before assuming "(fFoo == 1 || fFoo == 0)" */
|
|
#define Assert(f) AssertEx(f)
|
|
#define NotReached() AssertSz(fFalse, "NotReached() declaration reached")
|
|
#define AssertErr(sz) (pfnAssertFailed(sz, __FILE__, __LINE__), 0)
|
|
#define FImplies(a,b) (!(a)||(b))
|
|
#define AssertImplies(a, b) AssertSz(FImplies(a, b), #a " => " #b)
|
|
|
|
|
|
#pragma warning(disable:4705) /* Disable "Code has no effect" */
|
|
|
|
|
|
/* ****************************************************************** */
|
|
/* Item #2:
|
|
* A macro to compute the amount of storage required for an instance
|
|
* of a datatype which is defined with a repeating last element:
|
|
*
|
|
* struct s
|
|
* {
|
|
* int a,b,c;
|
|
* struct q
|
|
* {
|
|
* long x,y,z;
|
|
* } rgq[1];
|
|
* };
|
|
*
|
|
* To determine the number of bytes required to hold a "struct s"
|
|
* with "N" repeating elements of type "rgq", use "cbRep(struct s, rgq, N)";
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#define cbRep(s,r,n) (offsetof(s,r) + (n) * (sizeof(s) - offsetof(s,r)))
|
|
|
|
|
|
/* ****************************************************************** */
|
|
/* Item #3:
|
|
* Macros which work with tags for validating the types of structures.
|
|
*
|
|
* tagInvalid denotes a tag which will not be used for valid object types.
|
|
*
|
|
* Tag('A','B','C','D') generates a DWORD which looks like "ABCD" in a
|
|
* Little-Endian debugger memory dump.
|
|
*
|
|
* FHasTag() assumes that the structure parameter has a DWORD member
|
|
* named "tag", and checks it against the tag parameter.
|
|
*
|
|
* To use these macros, define a unique tag for each data type and a macro
|
|
* which performs typechecking for the type:
|
|
* #define tagFOO tag('F','O','O','@')
|
|
* #define FIsFoo(p) FHasTag(p,tagFoo)
|
|
*
|
|
* Next, initialize the tag when the structure is allocated:
|
|
*
|
|
* pfoo->tag = tagFOO;
|
|
*
|
|
* Then, for all APIs which manipulate items of type FOO, validate the
|
|
* type of the parameter before doing any work with it.
|
|
*
|
|
* if (!FIsFoo(pfoo))
|
|
* {
|
|
* // return an error.
|
|
* }
|
|
*/
|
|
|
|
#define tagInvalid ((DWORD) 0xB4B4B4B4)
|
|
#define Tag(a,b,c,d) ((DWORD)(d)<<24 | (DWORD)(c)<<16 | (DWORD)(b)<<8 | (a))
|
|
#define FHasTag(p,t) ((p) != NULL && (p)->tag == (t))
|
|
|
|
/* ****************************************************************** */
|
|
/* Item #4:
|
|
*
|
|
* Clever code from Word.h meaning: "a >= b && a <= c"
|
|
* (When b and c are constants, this can be done with one test and branch.)
|
|
*/
|
|
|
|
#define FBetween(a, b, c) (Assert(b <= c), \
|
|
(unsigned)((a) - (b)) <= (unsigned)((c) - (b))\
|
|
)
|
|
|
|
|
|
/* ****************************************************************** */
|
|
/* Item #4:
|
|
*
|
|
* Macro meaning: I'm ignoring this parameter on purpose.
|
|
*/
|
|
#define Unreferenced(a) ((void)a)
|
|
|
|
|
|
#endif /* LSIDEFS_DEFINED */
|