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octal escape theory_str

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This commit is contained in:
Murphy Berzish 2017-02-21 15:51:08 -05:00
parent a081d81941
commit 15e3d3ec3c
1 changed files with 23 additions and 2 deletions
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25
src/ast/str_decl_plugin.cpp
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@ -414,8 +414,29 @@ app * str_util::mk_string_with_escape_characters(std::string & val) {
parsedStr.push_back(convChar);
} else if (escapeChar1 == '0' || escapeChar1 == '1' || escapeChar1 == '2' || escapeChar1 == '3' ||
escapeChar1 == '4' || escapeChar1 == '5' || escapeChar1 == '6' || escapeChar1 == '7') {
// TODO octal escape
NOT_IMPLEMENTED_YET();
// octal escape: we expect exactly three octal digits
// which means that val[i], val[i+1], val[i+2] must all be octal digits
// and that i+2 must be a valid index
if (i+2 >= val.length()) {
get_manager().raise_exception("invalid octal escape: exactly three octal digits required");
}
char c2 = escapeChar1;
char c1 = val.at(i+1);
char c0 = val.at(i+2);
i += 2;
if (!isdigit(c2) || !isdigit(c1) || !isdigit(c0)) {
get_manager().raise_exception("invalid octal escape: exactly three octal digits required");
}
if (c2 == '8' || c2 == '9' || c1 == '8' || c1 == '9' || c0 == '8' || c0 == '9') {
get_manager().raise_exception("invalid octal escape: exactly three octal digits required");
}
char tmp[4] = {c2, c1, c0, '\0'};
long converted = strtol(tmp, NULL, 8);
unsigned char convChar = (unsigned char)converted;
parsedStr.push_back(convChar);
} else {
// unrecognized escape sequence -- just emit that character
parsedStr.push_back(escapeChar1);