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split out another file

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This commit is contained in:
Evan Martin 2010-10-19 23:52:17 -07:00
parent 397dd2d707
commit 3af3511a66
2 changed files with 60 additions and 57 deletions
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58
eval_env.h Normal file
View File

@ -0,0 +1,58 @@
struct EvalString {
struct Env {
virtual string Evaluate(const string& var) = 0;
};
bool Parse(const string& input);
string Evaluate(Env* env);
const string& unparsed() const { return unparsed_; }
string unparsed_;
enum TokenType { RAW, SPECIAL };
typedef vector<pair<string, TokenType> > TokenList;
TokenList parsed_;
};
bool EvalString::Parse(const string& input) {
unparsed_ = input;
string::size_type start, end;
start = 0;
do {
end = input.find_first_of("@$", start);
if (end == string::npos) {
end = input.size();
break;
}
if (end > start)
parsed_.push_back(make_pair(input.substr(start, end - start), RAW));
start = end;
for (end = start + 1; end < input.size(); ++end) {
if (!('a' <= input[end] && input[end] <= 'z'))
break;
}
if (end == start + 1) {
// XXX report bad parse here
return false;
}
parsed_.push_back(make_pair(input.substr(start, end - start), SPECIAL));
start = end;
} while (end < input.size());
if (end > start)
parsed_.push_back(make_pair(input.substr(start, end - start), RAW));
return true;
}
string EvalString::Evaluate(Env* env) {
string result;
for (TokenList::iterator i = parsed_.begin(); i != parsed_.end(); ++i) {
if (i->second == RAW)
result.append(i->first);
else
result.append(env->Evaluate(i->first));
}
return result;
}

59
ninja.h
View File

@ -9,6 +9,8 @@
using namespace std;
#include "eval_env.h"
struct Node;
struct FileStat {
FileStat(const string& path) : path_(path), mtime_(0), node_(NULL) {}
@ -34,63 +36,6 @@ struct Node {
vector<Edge*> out_edges_;
};
struct EvalString {
struct Env {
virtual string Evaluate(const string& var) = 0;
};
bool Parse(const string& input);
string Evaluate(Env* env);
const string& unparsed() const { return unparsed_; }
string unparsed_;
enum TokenType { RAW, SPECIAL };
typedef vector<pair<string, TokenType> > TokenList;
TokenList parsed_;
};
bool EvalString::Parse(const string& input) {
unparsed_ = input;
string::size_type start, end;
start = 0;
do {
end = input.find_first_of("@$", start);
if (end == string::npos) {
end = input.size();
break;
}
if (end > start)
parsed_.push_back(make_pair(input.substr(start, end - start), RAW));
start = end;
for (end = start + 1; end < input.size(); ++end) {
if (!('a' <= input[end] && input[end] <= 'z'))
break;
}
if (end == start + 1) {
// XXX report bad parse here
return false;
}
parsed_.push_back(make_pair(input.substr(start, end - start), SPECIAL));
start = end;
} while (end < input.size());
if (end > start)
parsed_.push_back(make_pair(input.substr(start, end - start), RAW));
return true;
}
string EvalString::Evaluate(Env* env) {
string result;
for (TokenList::iterator i = parsed_.begin(); i != parsed_.end(); ++i) {
if (i->second == RAW)
result.append(i->first);
else
result.append(env->Evaluate(i->first));
}
return result;
}
struct Rule {
Rule(const string& name, const string& command) :
name_(name) {