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This commit is contained in:
blueloveTH 2023-10-11 13:29:43 +08:00
parent 0a872143b8
commit 332b4100a5
1 changed files with 6 additions and 1 deletions
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7
src/lexer.cpp
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@ -483,7 +483,6 @@ static bool is_unicode_Lo_char(uint32_t c) {
} }
bool parse_int(std::string_view text, i64* out, int base){ bool parse_int(std::string_view text, i64* out, int base){
// TODO: detect overflow
*out = 0; *out = 0;
const auto f_startswith_2 = [](std::string_view t, const char* prefix) -> bool{ const auto f_startswith_2 = [](std::string_view t, const char* prefix) -> bool{
@ -497,6 +496,7 @@ bool parse_int(std::string_view text, i64* out, int base){
for(char c : text){ for(char c : text){
if(c >= '0' && c <= '9'){ if(c >= '0' && c <= '9'){
*out = (*out * 10) + (c - '0'); *out = (*out * 10) + (c - '0');
if(*out < 0) return false; // overflow
}else{ }else{
return false; return false;
} }
@ -509,6 +509,7 @@ bool parse_int(std::string_view text, i64* out, int base){
for(char c : text){ for(char c : text){
if(c == '0' || c == '1'){ if(c == '0' || c == '1'){
*out = (*out << 1) | (c - '0'); *out = (*out << 1) | (c - '0');
if(*out < 0) return false; // overflow
}else{ }else{
return false; return false;
} }
@ -521,6 +522,7 @@ bool parse_int(std::string_view text, i64* out, int base){
for(char c : text){ for(char c : text){
if(c >= '0' && c <= '7'){ if(c >= '0' && c <= '7'){
*out = (*out << 3) | (c - '0'); *out = (*out << 3) | (c - '0');
if(*out < 0) return false; // overflow
}else{ }else{
return false; return false;
} }
@ -533,10 +535,13 @@ bool parse_int(std::string_view text, i64* out, int base){
for(char c : text){ for(char c : text){
if(c >= '0' && c <= '9'){ if(c >= '0' && c <= '9'){
*out = (*out << 4) | (c - '0'); *out = (*out << 4) | (c - '0');
if(*out < 0) return false; // overflow
}else if(c >= 'a' && c <= 'f'){ }else if(c >= 'a' && c <= 'f'){
*out = (*out << 4) | (c - 'a' + 10); *out = (*out << 4) | (c - 'a' + 10);
if(*out < 0) return false; // overflow
}else if(c >= 'A' && c <= 'F'){ }else if(c >= 'A' && c <= 'F'){
*out = (*out << 4) | (c - 'A' + 10); *out = (*out << 4) | (c - 'A' + 10);
if(*out < 0) return false; // overflow
}else{ }else{
return false; return false;
} }