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Fixed number parsing problem.

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This commit is contained in:
yhirose 2015-04-25 08:11:06 +09:00
parent d35c460cc1
commit 738fe53e39
2 changed files with 20 additions and 27 deletions
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45
peglib.h
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@ -1757,12 +1757,9 @@ private:
std::pair<char, int> parse_hex_number(const char* s, size_t n, size_t i) {
char ret = 0;
int val;
if (i < n && is_hex(s[i], val)) {
ret = n;
if (i + 1 < n && is_hex(s[i + 1], val)) {
ret = ret * 16 + val;
i++;
}
while (i < n && is_hex(s[i], val)) {
ret = ret * 16 + val;
i++;
}
return std::make_pair(ret, i);
}
@ -1770,16 +1767,9 @@ private:
std::pair<char, int> parse_octal_number(const char* s, size_t n, size_t i) {
char ret = 0;
int val;
if (i < n && is_digit(s[i], val)) {
ret = n;
if (i + 1 < n && is_digit(s[i + 1], val)) {
ret = ret * 8 + val;
i++;
if (i + 1 < n && is_digit(s[i + 1], val)) {
ret = ret * 8 + val;
i++;
}
}
while (i < n && is_digit(s[i], val)) {
ret = ret * 8 + val;
i++;
}
return std::make_pair(ret, i);
}
@ -1788,31 +1778,34 @@ private:
std::string r;
r.reserve(n);
for (auto i = 0u; i < n; i++) {
auto i = 0u;
while (i < n) {
auto ch = s[i];
if (ch == '\\') {
i++;
switch (s[i]) {
case 'n': r += '\n'; break;
case 'r': r += '\r'; break;
case 't': r += '\t'; break;
case '\'': r += '\''; break;
case '"': r += '"'; break;
case '[': r += '['; break;
case ']': r += ']'; break;
case '\\': r += '\\'; break;
case 'n': r += '\n'; i++; break;
case 'r': r += '\r'; i++; break;
case 't': r += '\t'; i++; break;
case '\'': r += '\''; i++; break;
case '"': r += '"'; i++; break;
case '[': r += '['; i++; break;
case ']': r += ']'; i++; break;
case '\\': r += '\\'; i++; break;
case 'x': {
std::tie(ch, i) = parse_hex_number(s, n, i + 1);
r += ch;
break;
}
default: {
std::tie(ch, i) = parse_octal_number(s, n, i + 1);
std::tie(ch, i) = parse_octal_number(s, n, i);
r += ch;
break;
}
}
} else {
r += ch;
i++;
}
}
return r;

2
test/test.cc
View File

@ -235,7 +235,7 @@ TEST_CASE("Backtracking test", "[general]")
TEST_CASE("Octal/Hex value test", "[general]")
{
peglib::peg parser(
" ROOT <- '\132\x7a' "
R"( ROOT <- '\132\x7a' )"
);
auto ret = parser.parse("Zz");