p4wI18n.cpp #1

// Copyright 2004 Perforce Software.  All rights reserved.
//
// This file is part of Perforce - the FAST SCM System.
//
// p4wI18n:
//   Utility methods providing Unicode-safe string operations

#include <p4wp4.h>

#include "p4wI18n.h"

char  *p4wI18n::safeStrrchr( char *str, char c )
{
	//
	// Returns pointer to the last instance of
	// character c. Traversal of this string
	// is unicode-safe, provided that the character
	// is one byte.
	
	char *ret = NULL;
	
	//
	// If we are not using a unicode character set, use
	// strrchr instead.
	
	if( GlobalCharSet::Get() == 0 )
		return strrchr( str, c );

	CharStep *s = CharStep::Create( str, GlobalCharSet::Get() );

	for( char *ep = str + strlen( str ); 
	     s->Ptr() < ep; s->Next() ) {
		if( *s->Ptr() == c )
			ret = s->Ptr();
	}

	delete s;
	
	return ret;
}

int p4wI18n::safeStrrchrPos( char *str, char c )
{
	//
	// Returns byte-position of the last instance of
	// character c. Traversal of this string
	// is unicode-safe, provided that the character is
	// one byte.

	int ret = -1;
	char *p = NULL;
	
	//
	// If we are not using a unicode character set,
	// use strrchr instead.
	
	if( GlobalCharSet::Get() == 0 )
		return ( strrchr( str, c ) - str );

	CharStep *s = CharStep::Create( str, GlobalCharSet::Get() );

	for( char *ep = str + strlen( str ); 
	     s->Ptr() < ep; s->Next() ) {
		if( *s->Ptr() == c )
			p = s->Ptr();
	}

	if( p )
		ret = p - str;
	delete s;
	
	return ret;	
}

char  *p4wI18n::safeStrchr( char *str, char c )
{
	//
	// Returns pointer to the first instance of
	// character c. Traversal of this string
	// is unicode-safe, provided that the character
	// is one byte.
	
	char *ret = NULL;
	
	//
	// If we are not using a unicode character set,
	// use strchr instead.
	
	if( GlobalCharSet::Get() == 0 )
		return strchr( str, c );

	CharStep *s = CharStep::Create( str, GlobalCharSet::Get() );

	for( char *ep = str + strlen( str ); 
	     s->Ptr() < ep; s->Next() ) {
		if( *s->Ptr() == c ) {
			ret = s->Ptr();
			break;
		}
	}

	delete s;
	
	return ret;
}

int p4wI18n::safeStrchrPos( char *str, char c )
{
	//
	// Returns byte-position of the first instance of
	// character c. Traversal of this string
	// is unicode-safe, provided that the character
	// is one byte.

	int ret = -1;
	char *p = NULL;
	
	//
	// If we are not using a unicode character set,
	// use strchr instead.
		
	if( GlobalCharSet::Get() == 0 )
		return ( strchr( str, c ) - str );

	CharStep *s = CharStep::Create( str, GlobalCharSet::Get() );

	for( char *ep = str + strlen( str ); 
	     s->Ptr() < ep; s->Next() ) {
		if( *s->Ptr() == c ) {
			p = s->Ptr();
			break;
		}
	}

	if( p )
		ret = p - str;
	delete s;
	
	return ret;	
}

char *p4wI18n::convertText( CharSetCvt *cvt, char *s )
{
	//
	// Apply the character set converter and return
	// its result or NULL
	
	char *cvtPath = NULL;
	
	cvtPath = cvt->CvtBuffer( s, strlen( s ) );
	if( cvt->LastErr() != CharSetCvt::NONE ) {
		delete [] cvtPath;
		cvtPath = NULL;
	}
	
	return cvtPath;
}