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// Copyright (C) 1999-2005 Open Source Telecom Corporation.
// Copyright (C) 2006-2010 David Sugar, Tycho Softworks.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include <config.h>
#include <ucommon/protocols.h>
#include <ucommon/string.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
using namespace UCOMMON_NAMESPACE;
char *MemoryProtocol::dup(const char *str)
{
if(!str)
return NULL;
size_t len = strlen(str) + 1;
char *mem = static_cast<char *>(alloc(len));
String::set(mem, len, str);
return mem;
}
void *MemoryProtocol::dup(void *obj, size_t size)
{
assert(obj != NULL);
assert(size > 0);
char *mem = static_cast<char *>(alloc(size));
memcpy(mem, obj, size);
return mem;
}
void *MemoryProtocol::zalloc(size_t size)
{
void *mem = alloc(size);
if(mem)
memset(mem, 0, size);
return mem;
}
MemoryRedirect::MemoryRedirect(MemoryProtocol *protocol)
{
target = protocol;
}
void *MemoryRedirect::_alloc(size_t size)
{
// a null redirect uses the heap...
if(!target)
return malloc(size);
return target->_alloc(size);
}
BufferProtocol::BufferProtocol()
{
end = true;
eol = "\r\n";
input = output = buffer = NULL;
}
BufferProtocol::BufferProtocol(size_t size, type_t mode)
{
end = true;
eol = "\r\n";
input = output = buffer = NULL;
allocate(size, mode);
}
BufferProtocol::~BufferProtocol()
{
release();
}
void BufferProtocol::release(void)
{
if(buffer) {
flush();
free(buffer);
input = output = buffer = NULL;
end = true;
}
}
void BufferProtocol::allocate(size_t size, type_t mode)
{
release();
_clear();
if(!size)
return;
switch(mode) {
case BUF_RDWR:
input = buffer = (char *)malloc(size * 2);
if(buffer)
output = buffer + size;
break;
case BUF_RD:
input = buffer = (char *)malloc(size);
break;
case BUF_WR:
output = buffer = (char *)malloc(size);
break;
}
bufpos = insize = outsize = 0;
bufsize = size;
if(buffer)
end = false;
}
bool BufferProtocol::_blocking(void)
{
return false;
}
size_t BufferProtocol::get(char *address, size_t size)
{
size_t count = 0;
if(!input || !address)
return 0;
while(count < size) {
if(bufpos == insize) {
if(end)
return count;
insize = _pull(input, bufsize);
bufpos = 0;
if(insize == 0)
end = true;
else if(insize < bufsize && !_blocking())
end = true;
if(!insize)
return count;
}
address[count++] = input[bufpos++];
}
return count;
}
int BufferProtocol::_getch(void)
{
if(!input)
return EOF;
if(bufpos == insize) {
if(end)
return EOF;
insize = _pull(input, bufsize);
bufpos = 0;
if(insize == 0)
end = true;
else if(insize < bufsize && !_blocking())
end = true;
if(!insize)
return EOF;
}
return input[bufpos++];
}
size_t BufferProtocol::put(const char *address, size_t size)
{
size_t count = 0;
if(!output || !address)
return 0;
if(!size)
size = strlen(address);
while(count < size) {
if(outsize == bufsize) {
outsize = 0;
if(_push(output, bufsize) < bufsize) {
output = NULL;
end = true; // marks a disconnection...
return count;
}
}
output[outsize++] = address[count++];
}
return count;
}
int BufferProtocol::_putch(int ch)
{
if(!output)
return EOF;
if(outsize == bufsize) {
outsize = 0;
if(_push(output, bufsize) < bufsize) {
output = NULL;
end = true; // marks a disconnection...
return EOF;
}
}
output[outsize++] = ch;
return ch;
}
size_t BufferProtocol::printf(const char *format, ...)
{
va_list args;
int result;
size_t count;
if(!flush() || !output || !format)
return 0;
va_start(args, format);
result = vsnprintf(output, bufsize, format, args);
va_end(args);
if(result < 1)
return 0;
if((size_t)result > bufsize)
result = bufsize;
count = _push(output, result);
if(count < (size_t)result) {
output = NULL;
end = true;
}
return count;
}
void BufferProtocol::purge(void)
{
outsize = insize = bufpos = 0;
}
bool BufferProtocol::_flush(void)
{
if(!output)
return false;
if(!outsize)
return true;
if(_push(output, outsize) == outsize) {
outsize = 0;
return true;
}
output = NULL;
end = true;
return false;
}
char *BufferProtocol::gather(size_t size)
{
if(!input || size > bufsize)
return NULL;
if(size + bufpos > insize) {
if(end)
return NULL;
size_t adjust = outsize - bufpos;
memmove(input, input + bufpos, adjust);
insize = adjust + _pull(input, bufsize - adjust);
bufpos = 0;
if(insize < bufsize)
end = true;
}
if(size + bufpos <= insize) {
char *bp = input + bufpos;
bufpos += size;
return bp;
}
return NULL;
}
char *BufferProtocol::request(size_t size)
{
if(!output || size > bufsize)
return NULL;
if(size + outsize > bufsize)
flush();
size_t offset = outsize;
outsize += size;
return output + offset;
}
size_t BufferProtocol::putline(const char *string)
{
size_t count = 0;
if(string)
count += put(string);
if(eol)
count += put(eol);
return count;
}
size_t BufferProtocol::getline(string& s)
{
size_t result = getline(s.c_mem(), s.size() + 1);
String::fix(s);
return result;
}
size_t BufferProtocol::getline(char *string, size_t size)
{
size_t count = 0;
unsigned eolp = 0;
const char *eols = eol;
bool eof = false;
if(!eols)
eols="\0";
if(string)
string[0] = 0;
if(!input || !string)
return 0;
while(count < size - 1) {
int ch = BufferProtocol::_getch();
if(ch == EOF) {
eolp = 0;
eof = true;
break;
}
string[count++] = ch;
if(ch == eols[eolp]) {
++eolp;
if(eols[eolp] == 0)
break;
}
else
eolp = 0;
// special case for \r\n can also be just eol as \n
if(eq(eol, "\r\n") && ch == '\n') {
++eolp;
break;
}
}
count -= eolp;
string[count] = 0;
if(!eof)
++count;
return count;
}
void BufferProtocol::reset(void)
{
insize = bufpos = 0;
}
bool BufferProtocol::eof(void)
{
if(!input)
return true;
if(end && bufpos == insize)
return true;
return false;
}
bool BufferProtocol::_pending(void)
{
if(!input)
return false;
if(!bufpos)
return false;
return true;
}
void LockingProtocol::_lock(void)
{
}
void LockingProtocol::_unlock(void)
{
}

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