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Fix the compiler warnings related to unicode parsing

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Re #415
This commit is contained in:
Jason Turner 2018-03-01 13:40:49 -07:00
parent 1311c97c49
commit 81ebe1a7be
1 changed files with 30 additions and 31 deletions
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51
include/chaiscript/language/chaiscript_parser.hpp
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@ -1036,7 +1036,7 @@ namespace chaiscript
bool saw_interpolation_marker = false;
bool is_octal = false;
bool is_hex = false;
char is_unicode = 0;
std::size_t unicode_size = 0;
const bool interpolation_allowed;
string_type octal_matches;
@ -1059,7 +1059,7 @@ namespace chaiscript
process_hex();
}
if (is_unicode) {
if (unicode_size > 0) {
process_unicode();
}
}
@ -1086,34 +1086,32 @@ namespace chaiscript
void process_unicode()
{
unsigned ch = std::stoi(hex_matches, nullptr, 16);
const auto ch = static_cast<uint32_t>(std::stoi(hex_matches, nullptr, 16));
hex_matches.clear();
char buf[4];
if (ch < 0x80)
if (ch < 0x80) {
match += static_cast<char>(ch);
else if (ch < 0x800)
{
buf[0] = 0xC0 | (ch >> 6);
buf[1] = 0x80 | (ch & 0x3F);
} else if (ch < 0x800) {
buf[0] = static_cast<char>(0xC0 | (ch >> 6));
buf[1] = static_cast<char>(0x80 | (ch & 0x3F));
match.append(buf, 2);
}
else if (ch < 0x10000)
{
buf[0] = 0xE0 | (ch >> 12);
buf[1] = 0x80 | ((ch >> 6) & 0x3F);
buf[2] = 0x80 | (ch & 0x3F);
} else if (ch < 0x10000) {
buf[0] = static_cast<char>(0xE0 | (ch >> 12));
buf[1] = static_cast<char>(0x80 | ((ch >> 6) & 0x3F));
buf[2] = static_cast<char>(0x80 | (ch & 0x3F));
match.append(buf, 3);
}
else //if (ch < 0x200000)
{
buf[0] = 0xF0 | (ch >> 18);
buf[1] = 0x80 | ((ch >> 12) & 0x3F);
buf[2] = 0x80 | ((ch >> 6) & 0x3F);
buf[3] = 0x80 | (ch & 0x3F);
} else if (ch < 0x200000) {
buf[0] = static_cast<char>(0xF0 | (ch >> 18));
buf[1] = static_cast<char>(0x80 | ((ch >> 12) & 0x3F));
buf[2] = static_cast<char>(0x80 | ((ch >> 6) & 0x3F));
buf[3] = static_cast<char>(0x80 | (ch & 0x3F));
match.append(buf, 4);
} else {
// this must be an invalid escape sequence?
throw exception::eval_error("Unknown 32 bit unicode literal sequence");
}
is_escaped = false;
is_unicode = 0;
unicode_size = 0;
}
void parse(const char_type t_char, const int line, const int col, const std::string &filename) {
@ -1149,16 +1147,17 @@ namespace chaiscript
} else {
process_hex();
}
} else if (is_unicode) {
} else if (unicode_size > 0) {
if (is_hex_char) {
hex_matches.push_back(t_char);
if(hex_matches.size() == is_unicode) {
if(hex_matches.size() == unicode_size) {
// Format is specified to be 'slash'uABCD
// on collecting from A to D do parsing
process_unicode();
}
return;
} else {
// Not a unicode anymore, try parsing any way
// May be someone used 'slash'uAA only
@ -1181,9 +1180,9 @@ namespace chaiscript
} else if (t_char == 'x') {
is_hex = true;
} else if (t_char == 'u') {
is_unicode = 4;
unicode_size = 4;
} else if (t_char == 'U') {
is_unicode = 6;
unicode_size = 6;
} else {
switch (t_char) {
case ('\'') : match.push_back('\''); break;