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Implement sprintf

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1445 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2001-12-13 00:43:47 +00:00
parent 9a49b210c1
commit e7c6f726c8
1 changed files with 25 additions and 11 deletions
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36
lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
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@ -283,10 +283,12 @@ GenericValue lle_X_srand(MethodType *M, const vector<GenericValue> &Args) {
return GenericValue();
}
// int printf(sbyte *, ...) - a very rough implementation to make output useful.
GenericValue lle_X_printf(MethodType *M, const vector<GenericValue> &Args) {
const char *FmtStr = (const char *)Args[0].PointerVal;
unsigned ArgNo = 1;
// int sprintf(sbyte *, sbyte *, ...) - a very rough implementation to make
// output useful.
GenericValue lle_X_sprintf(MethodType *M, const vector<GenericValue> &Args) {
char *OutputBuffer = (char *)Args[0].PointerVal;
const char *FmtStr = (const char *)Args[1].PointerVal;
unsigned ArgNo = 2;
// printf should return # chars printed. This is completely incorrect, but
// close enough for now.
@ -295,14 +297,11 @@ GenericValue lle_X_printf(MethodType *M, const vector<GenericValue> &Args) {
switch (*FmtStr) {
case 0: return GV; // Null terminator...
default: // Normal nonspecial character
cout << *FmtStr++;
sprintf(OutputBuffer++, "%c", *FmtStr++);
break;
case '\\': { // Handle escape codes
char Buffer[3];
Buffer[0] = *FmtStr++;
Buffer[1] = *FmtStr++;
Buffer[2] = 0;
cout << Buffer;
sprintf(OutputBuffer, "%c%c", *FmtStr, *(FmtStr+1));
FmtStr += 2; OutputBuffer += 2;
break;
}
case '%': { // Handle format specifiers
@ -341,13 +340,27 @@ GenericValue lle_X_printf(MethodType *M, const vector<GenericValue> &Args) {
default: cout << "<unknown printf code '" << *FmtStr << "'!>";
ArgNo++; break;
}
cout << Buffer;
strcpy(OutputBuffer, Buffer);
OutputBuffer += strlen(Buffer);
}
break;
}
}
}
// int printf(sbyte *, ...) - a very rough implementation to make output useful.
GenericValue lle_X_printf(MethodType *M, const vector<GenericValue> &Args) {
char Buffer[10000];
vector<GenericValue> NewArgs;
GenericValue GV; GV.PointerVal = (PointerTy)Buffer;
NewArgs.push_back(GV);
NewArgs.insert(NewArgs.end(), Args.begin(), Args.end());
GV = lle_X_sprintf(M, NewArgs);
cout << Buffer;
return GV;
}
} // End extern "C"
@ -384,4 +397,5 @@ void Interpreter::initializeExternalMethods() {
FuncNames["lle_X_lrand48"] = lle_X_lrand48;
FuncNames["lle_X_sqrt"] = lle_X_sqrt;
FuncNames["lle_X_printf"] = lle_X_printf;
FuncNames["lle_X_sprintf"] = lle_X_sprintf;
}