Home » U++ Library support » U++ Core » CParser: proposal of new functions
Re: CParser: proposal of new functions [message #36252 is a reply to message #36251] |
Wed, 16 May 2012 21:08 |
Sender Ghost
Messages: 301 Registered: November 2008
|
Senior Member |
|
|
Hello, omari.
I think, you could do the same without changing the CParser class directly:
#include <Core/Core.h>
using namespace Upp;
class OmariCParser : public CParser {
public:
bool IsId2(const char *s1, const char *s2);
bool IsId3(const char *s1, const char *s2, const char *s3);
bool Id2(const char *s1, const char *s2);
bool Id3(const char *s1, const char *s2, const char *s3);
String ReadId2() throw(Error);
String ReadId3() throw(Error);
String ReadUntil(int delim);
String ReadLine() { return ReadUntil('\n'); }
OmariCParser(const char *ptr) : CParser(ptr) { }
OmariCParser(const char *ptr, const char *fn, int line = 1) : CParser(ptr, fn, line) { }
};
bool OmariCParser::IsId2(const char *s1, const char *s2)
{
if (!Id(s1)) return false;
return IsId(s2);
}
bool OmariCParser::IsId3(const char *s1, const char *s2, const char *s3)
{
if (!Id(s1) || !Id(s2)) return false;
return IsId(s3);
}
bool OmariCParser::Id2(const char *s1, const char *s2)
{
if (!Id(s1) || !Id(s2)) return false;
return true;
}
bool OmariCParser::Id3(const char *s1, const char *s2, const char *s3)
{
if (!Id(s1) || !Id(s2) || !Id(s3)) return false;
return true;
}
String OmariCParser::ReadId2() throw(Error)
{
String ret ="";
ret << ReadId();
const char* p = GetSpacePtr();
ret << String(p, term - p);
ret << ReadId();
return ret;
}
String OmariCParser::ReadId3() throw(Error)
{
String ret ="";
ret << ReadId();
const char* p = GetSpacePtr();
ret << String(p, term - p);
ret << ReadId();
p = GetSpacePtr();
ret << String(p, term - p);
ret << ReadId();
return ret;
}
String OmariCParser::ReadUntil(int delim)
{
StringBuffer result;
for(;;) {
if(*term == delim) {
term++;
DoSpaces();
return result;
}
else
if(*term == '\\') {
switch(*++term) {
case 'a': result.Cat('\a'); term++; break;
case 'b': result.Cat('\b'); term++; break;
case 't': result.Cat('\t'); term++; break;
case 'v': result.Cat('\v'); term++; break;
case 'n': result.Cat('\n'); term++; break;
case 'r': result.Cat('\r'); term++; break;
case 'f': result.Cat('\f'); term++; break;
case 'x': {
int hex = 0;
if(IsXDigit(*++term)) {
hex = ctoi(*term);
if(IsXDigit(*++term)) {
hex = 16 * hex + (*term >= 'A' ? ToUpper(*term) - 'A' + 10 : *term - '0');
term++;
}
}
result.Cat(hex);
break;
}
case 'u':
if(uescape) {
int hex = 0;
if(IsXDigit(*++term)) {
hex = ctoi(*term);
if(IsXDigit(*++term)) {
hex = 16 * hex + (*term >= 'A' ? ToUpper(*term) - 'A' + 10 : *term - '0');
if(IsXDigit(*++term)) {
hex = 16 * hex + (*term >= 'A' ? ToUpper(*term) - 'A' + 10 : *term - '0');
if(IsXDigit(*++term)) {
hex = 16 * hex + (*term >= 'A' ? ToUpper(*term) - 'A' + 10 : *term - '0');
term++;
}
}
}
}
result.Cat(WString(hex, 1).ToString());
}
else
result.Cat(*term++);
break;
default:
if(*term >= '0' && *term <= '7') {
int oct = *term++ - '0';
if(*term >= '0' && *term <= '7')
oct = 8 * oct + *term++ - '0';
if(*term >= '0' && *term <= '7')
oct = 8 * oct + *term++ - '0';
result.Cat(oct);
}
else
result.Cat(*term++);
break;
}
}
else {
if(*term == '\0')
return result;
result.Cat(*term++);
}
}
DoSpaces();
return result;
}
CONSOLE_APP_MAIN
{
const String filePath = "TestCase.txt";
String text = LoadFile(filePath);
if (text.IsVoid()) {
SetExitCode(1);
Cerr() << "Unable to load '" << filePath << "'\n";
return;
}
OmariCParser p(text);
try {
// Parsing of text here
}
catch (OmariCParser::Error e) {
Cerr() << "ERROR: " << e << '\n';
}
}
The good example is Esc parser, based on CParser.
|
|
|
Goto Forum:
Current Time: Thu May 16 13:01:22 CEST 2024
Total time taken to generate the page: 0.02257 seconds
|