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/**
* _String.cpp: implementation of the C_String class.
* Revision $Rev: 3794 $
* Last Modified $LastChangedDate: 2007-06-29 02:17:32 -0400 (Fri, 29 Jun 2007) $
**/
#include "_String.h"
#include "string.h"
#include "stdio.h"
#include <stdlib.h>
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
C_String::C_String()
{
this->content = (char *) malloc(sizeof(char));
this->content[0]='\0';
this->hasContent = true;
}
void C_String::freeContent()
{
if(this->hasContent){
this->hasContent = false;
free(this->content);
}
}
C_String::~C_String()
{
this->freeContent();
}
/**
* Copy constructor from a char string
**/
C_String::C_String(char * str1)
{
this->content = (char *) malloc(sizeof(char)*strlen(str1)+1);
if(this->content==NULL){
fprintf(stderr,"Memory allocation error, Quit.\n");
}
strcpy(this->content, str1);
this->hasContent = true;
}
C_String::C_String(C_String const &strObj1)
{
this->hasContent = false;
copy(strObj1);
}
C_String::C_String(const C_String & obj1, const C_String & obj2)
{
this->freeContent();
int len1 = strlen(obj1.content);
int len2 = strlen(obj2.content);
int fullLen = len1+len2;
this->content = (char *) malloc(sizeof(char)*len1 + sizeof(char)*len2 + 1);
if(this->content==NULL){
fprintf(stderr,"Memory allocation error, Quit.\n");
}
char * pointer = (char*) this->content;
strcpy(pointer, obj1.content); //copy first part
pointer += len1;
strcpy(pointer, obj2.content); //copy second part
this->content[fullLen]='\0';
this->hasContent = true;
}
void C_String::operator=(const C_String &strObj2)
{
copy(strObj2);
}
void C_String::copy(const C_String &strObj)
{
this->freeContent();
this->content = (char *) malloc(sizeof(char)*strlen(strObj.content)+1);
if(this->content==NULL){
fprintf(stderr,"Memory allocation error, Quit.\n");
}
strcpy(this->content, strObj.content);
this->hasContent = true;
}
void C_String::copy(const C_String &strObj, int copyLen)
{
this->freeContent();
this->content = (char *) malloc(sizeof(char)*(copyLen+1) );
if(this->content==NULL){
fprintf(stderr,"Memory allocation error, Quit.\n");
}
for(int i=0;i<copyLen;i++){
this->content[i]=strObj.getCharAtPos(i);
}
this->content[copyLen]='\0';
this->hasContent = true;
}
void C_String::print2stream(FILE *stream)
{
fprintf(stream, content);
}
int C_String::length() const
{
if(this->hasContent){
return strlen(this->content);
}
return 0;
}
bool C_String::operator==(const C_String &obj1) const
{
if(strcmp(this->content, obj1.content)==0){
return true;
};
return false;
}
bool C_String::operator!=(const C_String &obj1) const
{
if(strcmp(this->content, obj1.content)!=0){
return true;
};
return false;
}
bool C_String::operator<(const C_String &obj1) const
{
if(strcmp(this->content, obj1.content)<0){
return true;
};
return false;
}
char * C_String::toString() const
{
return this->content;
}
void C_String::clear()
{
this->freeContent();
this->content = (char *) malloc(sizeof(char));
this->content[0]='\0';
this->hasContent = true;
}
char C_String::getCharAtPos(int pos) const
{
if(pos>=this->length()){
fprintf(stderr,"Can not get char at pos %d, out of bound! Exit.\n", pos);
exit(0);
}
return this->content[pos];
}
void C_String::appending(const C_String &obj)
{
int len1 = 0;
if(this->hasContent){
len1 = strlen(this->content);
}
int len2 = strlen(obj.content);
int fullLen = len1+len2;
char * newContent = (char *) malloc(sizeof(char)*fullLen + 1);
if(newContent==NULL){
fprintf(stderr,"Memory allocation error, Quit.\n");
}
char * pointer = newContent;
if(this->hasContent){
strcpy(pointer, content); //copy first part
pointer += len1;
}
strcpy(pointer, obj.content); //copy second part
newContent[fullLen]='\0';
//free old content
this->freeContent();
//point to new content
this->content = newContent;
this->hasContent = true;
}
void C_String::appending(const char nextChar)
{
int len1 = 0;
if(this->hasContent){
len1 = strlen(this->content);
}
int fullLen = len1+1;
char * newContent = (char *) malloc(sizeof(char)*fullLen + 1);
if(newContent==NULL){
fprintf(stderr,"Memory allocation error, Quit.\n");
}
strcpy(newContent, content); //copy first part
newContent[len1]=nextChar; //copy second part
newContent[fullLen]='\0';
//free old content
this->freeContent();
//point to new content
this->content = newContent;
this->hasContent = true;
}
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