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/*
This class implements a dynamic string buffer
Copyright (C) 1998 Martin Vogt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation.
For more information look at the file COPYRIGHT in this package
*/
#include "buffer.h"
Buffer::Buffer(int size) {
nSize=size;
msg=(char*) malloc(sizeof(char)*(nSize+1));
msg[nSize]='\0';
clear();
}
Buffer::~Buffer() {
free (msg);
}
void Buffer::clear() {
msg[0]='\0';
}
void Buffer::append(int value) {
Buffer buf(30);
sprintf(buf.getData(),"%d",value);
append(buf.getData());
}
void Buffer::append(char* appendMsg) {
char* appendPos=getAppendPos();
int nlen=strlen(appendMsg);
if (appendPos == NULL) return;
append(appendMsg,nlen);
}
void Buffer::append(const char* appendMsg) {
append((char*)appendMsg);
}
void Buffer::append(char* buffer,int buflen) {
int nlen=len();
int nBedarf;
if (buflen+nlen <= nSize) {
char* appendPos=getAppendPos();
strncpy(appendPos,buffer,buflen);
appendPos[buflen]='\0';
return;
}
nBedarf=(nlen+buflen)-nSize;
grow(nBedarf);
append(buffer,buflen);
}
char* Buffer::getAppendPos() {
int i;
// this Array has nSize+1 entries!
// and it *is* granted that msg[nSize]=0; (think so)
for (i=0;i<=nSize;i++) {
if (msg[i] == '\0') return &(msg[i]);
}
// should never reach this point
return NULL;
}
void Buffer::setData(char* msg) {
if (strlen(msg) == 0) {
clear();
return;
}
clear();
append(msg);
}
char* Buffer::getData() {
return msg;
}
int Buffer::len() {
return strlen(msg);
}
int Buffer::getSize() {
return nSize;
}
void Buffer::grow(int size) {
int i;
int newSize=nSize+size;
char* tmp=(char*) malloc(sizeof(char)*(newSize+1));
tmp[newSize]='\0';
for(i=0;i<=nSize;i++) {
tmp[i]=msg[i];
}
nSize=newSize;
free(msg);
msg=tmp;
}
int Buffer::find(char zeichen) {
int i;
int nlen=len();
for(i=0;i<nlen;i++) {
if (msg[i] == zeichen) return i;
}
return -1;
}
void Buffer::forward(int bytes) {
int i;
int aktPos;
int nlen=len();
if (bytes > nlen) {
bytes=nlen;
}
i=0;
aktPos=bytes;
while(aktPos <= nlen) {
msg[i]=msg[aktPos];
i++;
aktPos++;
}
}
void Buffer::print() {
printf("Buffer:%s\n",msg);
}
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