1 files changed, 166 insertions, 0 deletions
diff --git a/mpeglib/lib/util/dynBuffer.cpp b/mpeglib/lib/util/dynBuffer.cpp
new file mode 100644
index 00000000..c93d5381
--- /dev/null
+++ b/mpeglib/lib/util/dynBuffer.cpp
@@ -0,0 +1,166 @@
+/*
+  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 "dynBuffer.h"
+
+#include <iostream>
+
+using namespace std;
+
+
+DynBuffer::DynBuffer(int size) {
+  nSize=size;
+  msg=(char*) malloc(sizeof(char)*(nSize+1));
+  msg[nSize]='\0';
+  clear();
+
+}
+
+
+DynBuffer::~DynBuffer() {
+  free (msg);
+}
+
+
+void DynBuffer::clear() {
+  msg[0]='\0';
+}
+
+void DynBuffer::append(int value) {
+  DynBuffer buf(30);
+  sprintf(buf.getData(),"%d",value);
+  append(buf.getData());
+}
+
+
+
+
+void DynBuffer::append(char* appendMsg) {
+  if (appendMsg == msg) {
+    cout << "cannot append to self"<<endl;
+    exit(0);
+  }
+  char* appendPos=getAppendPos();
+  int nlen=strlen(appendMsg);
+  if (appendPos == NULL) return;
+  
+  append(appendMsg,nlen);
+}
+ 
+
+void DynBuffer::append(const char* appendMsg) {
+  append((char*)appendMsg);
+}
+
+ 
+void DynBuffer::append(char* buffer,int buflen) {
+  int nlen=len();
+  int nBedarf;
+  if (buffer == msg) {
+    cout << "cannot append to self"<<endl;
+    exit(0);
+  }
+  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* DynBuffer::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 DynBuffer::setData(char* msg) {
+  if (strlen(msg) == 0) {
+    clear();
+    return;
+  }
+  clear();
+  append(msg);
+}
+
+char* DynBuffer::getData() {
+  return msg;
+}
+
+
+int  DynBuffer::len() {
+  return strlen(msg);
+}  
+
+int DynBuffer::getSize() {
+  return nSize;
+}
+
+void DynBuffer::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 DynBuffer::find(char zeichen) {
+  int i;
+  int nlen=len();
+  for(i=0;i<nlen;i++) {
+    if (msg[i] == zeichen) return i;
+  }
+  return -1;
+}
+
+
+
+void DynBuffer::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 DynBuffer::print() {
+  printf("DynBuffer:%s\n",msg);
+}