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#ifndef VHDLSTRING_H
#define VHDLSTRING_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/** @brief Minimal string class with std::string like behaviour that fulfills the JavaCC
* string requirements.
*/
class VhdlString
{
public:
VhdlString()
{
init();
}
VhdlString(const VhdlString &other)
{
m_str = (char*)malloc(other.m_len+1);
memcpy(m_str,other.m_str,other.m_len);
m_len = other.m_len;
m_str[m_len]=0;
}
VhdlString &operator=(const VhdlString &other)
{
if (this!=&other)
{
free(m_str);
m_str = (char*)malloc(other.m_len+1);
memcpy(m_str,other.m_str,other.m_len);
m_len = other.m_len;
m_str[m_len]=0;
}
return *this;
}
VhdlString(const char *s)
{
m_len = strlen(s);
m_str=(char*)malloc(m_len+1);
memcpy(m_str,s,m_len+1);
}
VhdlString(const char *s,int size)
{
m_str = (char*)malloc(size+1);
memcpy(m_str,s,size);
m_str[size]=0;
m_len=size;
}
~VhdlString()
{
free(m_str);
}
VhdlString& append(const char *s,int size)
{
int oldlen = m_len;
m_len+=size+1;
if (m_len)
{
m_str = (char*)realloc(m_str,m_len);
memcpy(m_str+oldlen,s,m_len-oldlen-1);
m_str[m_len-1]=0;
}
return *this;
}
VhdlString& append(const char *s)
{
return append(s,strlen(s));
}
VhdlString& append(const VhdlString &other)
{
return append(other.m_str,other.m_len);
}
VhdlString substr(int pos=0,int len=-1)
{
return VhdlString(m_str?m_str+pos:0,len==-1?m_len-pos:m_len);
}
int copy(char *s,int len,int pos=0) const
{
if (len==0) return 0;
if (pos>=m_len) { s[0]=0; return 0; }
int r=m_len<pos+len ? m_len-pos : len;
memcpy(s,m_str+pos,r);
return r;
}
const char *c_str() const { return m_str; }
const char *data() const { return m_str; }
int size() const { return m_len; }
int length() const { return m_len; }
char & operator[](int i) { return m_str[i]; }
const char &operator[](int i) const { return m_str[i]; }
void clear() { free(m_str); init(); }
VhdlString operator+=(char c) { char s[2]; s[0]=c; s[1]=0; return append(s); }
private:
void init() { m_str=(char*)calloc(1,1); m_len=0; }
char *m_str;
int m_len;
};
#endif
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