bool ReadValue(AnyValue& value,std::istream& in,const std::string& delims)
{
EatWhitespace(in);
if(!in) {
printf("ReadValue: hit end of file\n");
return false;
}
if(in.peek() == '"') {
//beginning of string
std::string str;
if(!InputQuotedString(in,str)) {
printf("ReadValue: unable to read quoted string\n");
return false;
}
value = str;
return true;
}
else if(in.peek() == '\'') {
//character: TODO: translate escapes properly
in.get();
char c=in.get();
value = c;
char end=in.get();
if(end != '\'') {
printf("ReadValue: character not delimited properly\n");
return false;
}
return true;
}
else {
std::string str;
if(delims.empty())
in >> str;
else {
while(in && delims.find(in.peek()) == std::string::npos && !isspace(in.peek())) {
str += in.get();
}
}
if(str.empty()) {
printf("ReadValue: read an empty string\n");
return false;
}
if(IsValidInteger(str.c_str())) {
int val;
std::stringstream ss(str);
ss>>val;
value = val;
return true;
}
bool SafeInputString(std::istream& in, std::string& str)
{
//first eat up white space
str.erase();
while(in && isspace(in.peek())) in.get();
if(!in) return false;
if(in.peek() == EOF) return false;
if(in.peek() == '\"') return InputQuotedString(in,str);
else { //read until new whitespace
while(in) {
char c = in.get();
if(isspace(c) || c==EOF)
return true;
str += c;
}
if(in.eof()) return true;
return false;
}
}
bool SafeInputString(std::istream& in, char* str,int n)
{
EatWhitespace(in);
if(!in) return false;
if(in.peek() == EOF) return false;
if(in.peek() == '\"') return InputQuotedString(in,str,n);
else { //read until new whitespace
int i;
for(i=0;i<n;i++) {
str[i] = in.get();
if(isspace(str[i]) || in.eof()) {
str[i] = 0;
return true;
}
if(!in) return false;
}
//buffer overflowed
return false;
}
}
