void path::check() const {
arx_assert_msg(pathstr.find('\\') == std::string::npos, "bad path: \"%s\"", pathstr.c_str());
size_t pos = 0;
while(is_path_up(pathstr, pos)) {
pos += 3;
}
while(pos < pathstr.length()) {
size_t next = pathstr.find(dir_sep, pos);
if(next == std::string::npos) {
next = pathstr.length();
} else {
arx_assert_msg(next + 1 != pathstr.length(), "bad path: \"%s\"", pathstr.c_str());
}
arx_assert_msg(next > pos, "bad path: \"%s\"", pathstr.c_str());
arx_assert_msg(next - pos > 1 || pathstr[pos] != '.', "bad path: \"%s\"", pathstr.c_str());
if(next - pos == 2) {
arx_assert_msg(pathstr[pos] != '.' || pathstr[pos + 1] != '.', "bad path: \"%s\"", pathstr.c_str());
}
pos = next + 1;
}
}
path path::resolve(const path & a, const path & b) {
size_t bpos = 0;
size_t apos = a.pathstr.length();
while(true) {
size_t dirpos = a.pathstr.find_last_of(dir_sep, apos - 1);
if(dirpos == std::string::npos) {
if(bpos + 3 >= b.pathstr.length()) {
return create(".");
} else {
return b.pathstr.substr(bpos + 3);
}
}
if(is_path_up(a.pathstr, dirpos + 1)) {
return create(a.pathstr.substr(0, apos) + dir_sep + b.pathstr.substr(bpos));
}
if(dirpos == 0 || (dirpos == 1 && a.pathstr[0] == dir_sep)) {
if(dirpos != apos - 1) {
bpos += 3;
}
if(bpos >= b.pathstr.length()) {
return create(a.pathstr.substr(0, dirpos) + dir_sep);
} else {
return create(a.pathstr.substr(0, dirpos) + dir_sep + b.pathstr.substr(bpos));
}
}
apos = dirpos, bpos += 3;
if(!is_path_up(b.pathstr, bpos)) {
if(bpos >= b.pathstr.length()) {
return create(a.pathstr.substr(0, apos));
} else {
return create(a.pathstr.substr(0, apos) + dir_sep + b.pathstr.substr(bpos));
}
}
}
}
path path::resolve(const path & a, const path & b) {
if(a.empty()) {
return b;
}
size_t bpos = 0;
size_t apos = a.pathstr.length();
while(true) {
size_t dirpos = a.pathstr.find_last_of(dir_sep, apos - 1);
if(dirpos == std::string::npos) {
if(bpos + 3 >= b.pathstr.length()) {
return path();
} else {
return b.pathstr.substr(bpos + 3);
}
}
if(is_path_up(a.pathstr, dirpos + 1)) {
return path(a.pathstr.substr(0, apos) + dir_sep + b.pathstr.substr(bpos));
}
apos = dirpos, bpos += 3;
if(!is_path_up(b.pathstr, bpos)) {
if(bpos >= b.pathstr.length()) {
return path(a.pathstr.substr(0, apos));
} else {
return path(a.pathstr.substr(0, apos) + dir_sep + b.pathstr.substr(bpos));
}
}
}
}
