From 34b70b0b46e34a73308a4034cc9b1c70209b9eb4 Mon Sep 17 00:00:00 2001
From: Fritz Elfert <felfert@to.com>
Date: Mon, 28 Jun 1999 08:56:01 +0000
Subject: First import.

---
 lib/bufferstore.cc | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 lib/bufferstore.cc

(limited to 'lib/bufferstore.cc')

diff --git a/lib/bufferstore.cc b/lib/bufferstore.cc
new file mode 100644
index 0000000..8138ad2
--- /dev/null
+++ b/lib/bufferstore.cc
@@ -0,0 +1,166 @@
+//
+//  PLP - An implementation of the PSION link protocol
+//
+//  Copyright (C) 1999  Philip Proudman
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation; either version 2 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  e-mail philip.proudman@btinternet.com
+
+#include <stream.h>
+#include <iomanip.h>
+#include <string.h>
+
+#include "bufferstore.h"
+
+bufferStore::bufferStore() {
+  lenAllocd = 0;
+  buff = NULL;
+  len = 0;
+  start = 0;
+}
+
+bufferStore::bufferStore(const bufferStore &a) {
+  lenAllocd = (a.getLen() > MIN_LEN) ? a.getLen() : MIN_LEN;
+  buff = new unsigned char [lenAllocd];
+  len = a.getLen();
+  for (long i=0; i<len; i++) buff[i] = a.getByte(i);
+  start = 0;
+}
+
+bufferStore::bufferStore(const unsigned char*_buff, long _len) {
+  lenAllocd = (_len > MIN_LEN) ? _len : MIN_LEN;
+  buff = new unsigned char [lenAllocd];
+  len = _len;
+  for (long i=0; i<len; i++) buff[i] = _buff[i];
+  start = 0;
+}
+
+void bufferStore::operator =(const bufferStore &a) {
+  checkAllocd(a.getLen());
+  len = a.getLen();
+  for (long i=0; i<len; i++) buff[i] = a.getByte(i);
+  start = 0;
+}
+
+void bufferStore::init() {
+  start = 0;
+  len = 0;
+}
+
+void bufferStore::init(const unsigned char*_buff, long _len) {
+  checkAllocd(_len);
+  start = 0;
+  len = _len;
+  for (long i=0; i<len; i++) buff[i] = _buff[i];
+}
+
+bufferStore::~bufferStore() {
+  delete [] buff;
+}
+
+unsigned long bufferStore::getLen() const {
+  if (start > len) return 0;
+  return len - start;
+}
+
+unsigned char bufferStore::getByte(long pos) const {
+  return buff[pos+start];
+}
+
+unsigned int bufferStore::getWord(long pos) const {
+  return buff[pos+start] + (buff[pos+start+1] << 8);
+}
+
+unsigned int bufferStore::getDWord(long pos) const {
+  return buff[pos+start] +
+    (buff[pos+start+1] << 8) +
+    (buff[pos+start+2] << 16) +
+    (buff[pos+start+3] << 24);
+}
+
+const char* bufferStore::getString(long pos) const {
+  return (const char*)buff+pos+start;
+}
+
+ostream &operator<<(ostream &s, const bufferStore &m) {
+  {
+    for (int i = m.start; i < m.len; i++)
+      s << hex << setw(2) << setfill('0') << (int)m.buff[i] << " ";
+  }
+  s << "(";
+  {
+    for (int i = m.start; i < m.len; i++) {
+      unsigned char c = m.buff[i];
+      if (c>=' ' && c <= 'z') s << c;
+    }
+  }
+  s<< ")";
+  return s;
+}
+
+void bufferStore::discardFirstBytes(int n) {
+  start += n;
+  if (start > len) start = len;
+}
+
+void bufferStore::checkAllocd(long newLen) {
+  if (newLen >= lenAllocd) {
+    do {
+      if (lenAllocd < MIN_LEN)
+	lenAllocd = MIN_LEN;
+      else
+	lenAllocd *= 2;
+    } while (newLen >= lenAllocd);
+    unsigned char* newBuff = new unsigned char [lenAllocd];
+    for (int i=start; i<len; i++) newBuff[i] = buff[i];
+    delete [] buff;
+    buff = newBuff;
+  }
+}
+
+void bufferStore::addByte(unsigned char cc) {
+  checkAllocd(len + 1);
+  buff[len++] = cc;
+}
+
+void bufferStore::addString(const char* s) {
+  checkAllocd(len + strlen(s));
+  for (int i=0; s[i]; i++) buff[len++] = s[i];
+}
+
+void bufferStore::addStringT(const char* s) {
+  addString(s);
+  addByte(0);
+}
+
+void bufferStore::addBuff(const bufferStore &s, long maxLen) {
+  checkAllocd(len + s.getLen());
+  for (unsigned long i=0; i < s.getLen() && (maxLen < 0 || i < (unsigned long)maxLen); i++) buff[len++] = s.getByte(i);
+}
+
+void bufferStore::addWord(int a) {
+  checkAllocd(len + 2);
+  buff[len++] = a & 0xff;
+  buff[len++] = (a>>8) & 0xff;
+}
+
+void bufferStore::addDWord(long a) {
+  checkAllocd(len + 4);
+  buff[len++] = a & 0xff;
+  buff[len++] = (a>>8) & 0xff;
+  buff[len++] = (a>>16) & 0xff;
+  buff[len++] = (a>>24) & 0xff;  
+}
-- 
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