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.developing preprocesor

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git-svn-id: svn://ultimatepp.org/upp/trunk@8155 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2015-02-08 18:06:59 +00:00
parent 5e074396f7
commit 9588f09099
11 changed files with 176 additions and 43 deletions
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109
uppdev/cpp/cpp.cpp
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@ -1,5 +1,7 @@
#include "cpp.h"
#include <string.h>
#define LLOG(x)
bool IsSpc(byte c)
@ -7,6 +9,11 @@ bool IsSpc(byte c)
return c > 0 && c <= 32;
}
String CppMacro::ToString() const
{
return String().Cat() << "(" << AsString(param) << ") " << body;
}
String CppMacro::Expand(const Vector<String>& p)
{
String r;
@ -18,13 +25,25 @@ String CppMacro::Expand(const Vector<String>& p)
while(IsAlNum(*s) || *s == '_')
s++;
String id(b, s);
int q = param.Find(id);
if(q >= 0) {
if(q < p.GetCount())
r.Cat(p[q]);
static String VA_ARGS("__VA_ARGS__"); // Speed optimization
if(id == VA_ARGS) {
bool next = false;
for(int i = param.GetCount(); i < p.GetCount(); i++) {
if(next)
r.Cat(", ");
r.Cat(p[i]);
next = true;
}
}
else {
int q = param.Find(id);
if(q >= 0) {
if(q < p.GetCount())
r.Cat(p[q]);
}
else
r.Cat(id);
}
else
r.Cat(id);
continue;
}
if(s[0] == '#' && s[1] == '#') {
@ -50,7 +69,8 @@ String CppMacro::Expand(const Vector<String>& p)
int q = param.Find(id);
if(q >= 0) {
if(q <= p.GetCount()) {
r.Cat(AsCString(p[q]));
if(q < p.GetCount())
r.Cat(AsCString(p[q]));
s = ss;
continue;
}
@ -80,6 +100,8 @@ void Cpp::Define(const char *s)
m.param.Add(p.ReadId());
p.Char(',');
}
if(p.Char3('.', '.', '.'))
m.variadic = true;
p.Char(')');
}
m.body = p.GetPtr();
@ -124,8 +146,18 @@ void Cpp::ParamAdd(Vector<String>& param, const char *s, const char *e)
String Cpp::Expand(const char *s)
{
String r;
StringBuffer r;
while(*s) {
if(incomment) {
if(s[0] == '*' && s[1] == '/') {
incomment = false;
s += 2;
r.Cat("*/");
}
else
r.Cat(*s++);
}
else
if(IsAlpha(*s) || *s == '_') {
const char *b = s;
s++;
@ -136,6 +168,7 @@ String Cpp::Expand(const char *s)
if(q >= 0 && !macro[q].flag) {
LLOG("Expanding " << id);
Vector<String> param;
const char *s0 = s;
while(*s && (byte)*s <= ' ') s++;
if(*s == '(') {
s++;
@ -170,6 +203,8 @@ String Cpp::Expand(const char *s)
else
s++;
}
else
s = s0; // otherwise we eat spaces after parameterless macro
macro[q].flag = true;
r.Cat(Expand(macro[q].Expand(param)));
macro[q].flag = false;
@ -177,8 +212,66 @@ String Cpp::Expand(const char *s)
else
r.Cat(id);
}
else
if(s[0] == '/' && s[1] == '*') {
incomment = true;
s += 2;
r.Cat("/*");
}
else
if(s[0] == '/' && s[1] == '/') {
r.Cat(s);
break;
}
else
r.Cat(*s++);
}
return r;
}
String Cpp::Preprocess(Stream& in, bool needresult)
{
incomment = false;
StringBuffer result;
result.Clear();
result.Reserve(16384);
while(!in.IsEof()) {
String l = in.GetLine();
int el = 0;
while(*l.Last() == '\\' && !in.IsEof()) {
el++;
l.Trim(l.GetLength() - 1);
l.Cat(in.GetLine());
}
const char *s = l;
while(*s == ' ')
s++;
if(*s == '#') {
result.Cat("\n");
if(strncmp(s + 1, "define", 6) == 0)
Define(s + 7);
}
else
if(needresult)
result.Cat(Expand(l) + "\n");
else {
const char *s = l;
while(*s) {
if(s[0] == '/' && s[1] == '*') {
incomment = true;
s += 2;
}
else
if(s[0] == '*' && s[1] == '/') {
incomment = false;
s += 2;
}
s++;
}
}
if(needresult)
while(el--)
result.Cat("\n");
}
return result;
}