74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
|
// Macro.C - contains routines that have to do with macros
|
||
|
|
//
|
||
|
|
// Copyright (c) 1988-1991, Microsoft Corporation. All Rights Reserved.
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
// Contains routines that have to do with macros
|
||
|
|
//
|
||
|
|
// Revision History:
|
||
|
|
// 16-May-1991 SB Created from routines that existed elsewhere
|
||
|
|
|
||
|
|
#include "precomp.h"
|
||
|
|
#pragma hdrstop
|
||
|
|
|
||
|
|
static STRINGLIST **lastMacroChain = NULL;
|
||
|
|
|
||
|
|
// findMacro - look up a string in a hash table
|
||
|
|
//
|
||
|
|
// Look up a macro name in a hash table and return the entry
|
||
|
|
// or NULL.
|
||
|
|
// If a macro and undefined, return NULL.
|
||
|
|
|
||
|
|
MACRODEF * findMacro(char *str)
|
||
|
|
{
|
||
|
|
unsigned n;
|
||
|
|
char *string = str;
|
||
|
|
STRINGLIST *found;
|
||
|
|
|
||
|
|
if (*string) {
|
||
|
|
for (n = 0; *string; n += *string++); //Hash
|
||
|
|
n %= MAXMACRO;
|
||
|
|
#if defined(STATISTICS)
|
||
|
|
CntfindMacro++;
|
||
|
|
#endif
|
||
|
|
lastMacroChain = (STRINGLIST **)¯oTable[n];
|
||
|
|
for (found = *lastMacroChain; found; found = found->next) {
|
||
|
|
#if defined(STATISTICS)
|
||
|
|
CntmacroChains++;
|
||
|
|
#endif
|
||
|
|
if (!_tcscmp(found->text, str)) {
|
||
|
|
return((((MACRODEF *)found)->flags & M_UNDEFINED) ? NULL : (MACRODEF *)found);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// set lastMacroChain, even for an empty name
|
||
|
|
lastMacroChain = (STRINGLIST **)¯oTable[0];
|
||
|
|
}
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
// insertMacro
|
||
|
|
//
|
||
|
|
// Macro insertion requires that we JUST did a findMacro, which action set lastMacroChain.
|
||
|
|
|
||
|
|
void insertMacro(STRINGLIST * p)
|
||
|
|
{
|
||
|
|
#ifdef STATISTICS
|
||
|
|
CntinsertMacro++;
|
||
|
|
#endif
|
||
|
|
assert(lastMacroChain != NULL);
|
||
|
|
prependItem(lastMacroChain, p);
|
||
|
|
lastMacroChain = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// 16/May/92 Bryant Init the macro table to a known state before
|
||
|
|
// continuing.
|
||
|
|
|
||
|
|
void initMacroTable(MACRODEF *table[])
|
||
|
|
{
|
||
|
|
unsigned num;
|
||
|
|
for (num = 0; num < MAXMACRO; num++) {
|
||
|
|
table[num] = NULL;
|
||
|
|
}
|
||
|
|
}
|