200 lines
5 KiB
C++
200 lines
5 KiB
C++
#include <vector>
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#include <iostream>
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#include <cstdio>
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#include <string>
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#include <cstring>
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using namespace std;
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struct Decoder
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{
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enum { stTop, stEscape, stCSI } state;
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string line;
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bool inHeader;
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int level;
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vector<int> args;
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bool newNumber;
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int priority;
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bool ignoreLF;
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int lineNo, charNo;
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bool warning;
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bool error;
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Decoder()
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{
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state = stTop;
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line = "";
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inHeader = false;
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level = 0;
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priority = 1;
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ignoreLF = false;
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lineNo = 1;
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charNo = 0;
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warning = false;
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error = false;
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}
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void pushChar(char c);
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void finishLine();
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void decodeFile(istream & st);
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};
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void Decoder::pushChar(char c)
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{
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if (c == '\n') {
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lineNo++;
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charNo = 0;
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} else charNo++;
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switch (state) {
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case stTop:
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if (c == '\e') {
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state = stEscape;
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} else if (c == '\n' && !ignoreLF) {
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finishLine();
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} else line += c;
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break;
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case stEscape:
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if (c == '[') {
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state = stCSI;
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args.clear();
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newNumber = true;
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} else
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state = stTop; /* !!! wrong */
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break;
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case stCSI:
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if (c >= 0x40 && c != 0x7e) {
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state = stTop;
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switch (c) {
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case 'p':
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if (line.size()) finishLine();
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level++;
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inHeader = true;
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cout << "<nest>" << endl;
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priority = args.size() >= 1 ? args[0] : 1;
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break;
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case 'q':
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if (line.size()) finishLine();
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if (level > 0) {
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level--;
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cout << "</nest>" << endl;
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} else
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cerr << "not enough nesting levels at line "
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<< lineNo << ", character " << charNo << endl;
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break;
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case 's':
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if (line.size()) finishLine();
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priority = args.size() >= 1 ? args[0] : 1;
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break;
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case 'a':
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ignoreLF = true;
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break;
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case 'b':
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ignoreLF = false;
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break;
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case 'e':
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error = true;
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break;
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case 'w':
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warning = true;
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break;
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}
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} else if (c >= '0' && c <= '9') {
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int n = 0;
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if (!newNumber) {
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n = args.back() * 10;
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args.pop_back();
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}
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n += c - '0';
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args.push_back(n);
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}
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break;
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}
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}
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void Decoder::finishLine()
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{
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string storeDir = "/nix/store/";
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int sz = storeDir.size();
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string tag = inHeader ? "head" : "line";
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cout << "<" << tag;
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if (priority != 1) cout << " priority='" << priority << "'";
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if (warning) cout << " warning='1'";
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if (error) cout << " error='1'";
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cout << ">";
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for (unsigned int i = 0; i < line.size(); i++) {
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if (line[i] == '<') cout << "<";
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else if (line[i] == '&') cout << "&";
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else if (line[i] == '\r') ; /* ignore carriage return */
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else if (line[i] < 32 && line[i] != 9) cout << "�";
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else if (i + sz + 33 < line.size() &&
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string(line, i, sz) == storeDir &&
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line[i + sz + 32] == '-')
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{
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int j = i + sz + 32;
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/* skip name */
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while (!strchr("/\n\r\t ()[]:;?<>", line[j])) j++;
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int k = j;
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while (!strchr("\n\r\t ()[]:;?<>", line[k])) k++;
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// !!! escaping
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cout << "<storeref>"
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<< "<storedir>"
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<< string(line, i, sz)
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<< "</storedir>"
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<< "<hash>"
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<< string(line, i + sz, 32)
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<< "</hash>"
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<< "<name>"
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<< string(line, i + sz + 32, j - (i + sz + 32))
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<< "</name>"
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<< "<path>"
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<< string(line, j, k - j)
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<< "</path>"
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<< "</storeref>";
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i = k - 1;
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} else cout << line[i];
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}
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cout << "</" << tag << ">" << endl;
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line = "";
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inHeader = false;
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priority = 1;
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warning = false;
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error = false;
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}
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void Decoder::decodeFile(istream & st)
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{
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int c;
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cout << "<logfile>" << endl;
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while ((c = st.get()) != EOF) {
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pushChar(c);
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}
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if (line.size()) finishLine();
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while (level--) cout << "</nest>" << endl;
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cout << "</logfile>" << endl;
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}
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int main(int argc, char * * argv)
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{
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Decoder dec;
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dec.decodeFile(cin);
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}
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