File content as of revision 61:aad055f1b0d1:

#include <stdbool.h>
#include <stdio.h>

#include "http.h"

static int currentPositionInMessage;
static int bufferPositionInMessage;
static int bufferLength;
static char* pBuffer;
static char* p;

static bool currentPositionIsInBuffer()
{
    return currentPositionInMessage >= bufferPositionInMessage && currentPositionInMessage < bufferPositionInMessage + bufferLength;
}

void TcpBufStart(int position, int mss, char *pData)
{
    currentPositionInMessage = 0;
    bufferPositionInMessage = position;
    bufferLength = mss;
    pBuffer = pData;
    p       = pData;
}
int TcpBufLength()
{
    return p - pBuffer;
}

void TcpBufAddChar(char c)
{
    if (currentPositionIsInBuffer()) *p++ = c;
    currentPositionInMessage++;
}
void TcpBufFillChar(char c, int length)
{
    while (length > 0)
    {
        if (currentPositionIsInBuffer()) *p++ = c;
        currentPositionInMessage++;
        length--;
    }
}
int TcpBufAddText(const char* text)
{
    const char* start = text;
    while (*text)
    {
        if (currentPositionIsInBuffer()) *p++ = *text;
        text++;
        currentPositionInMessage++;
    }
    return text - start;
}
int TcpBufAddV(char *fmt, va_list argptr)
{
    int size  = vsnprintf(NULL, 0, fmt, argptr);  //Find the size required
    char text[size + 1];                          //Allocate enough memory for the size required with an extra byte for the terminating null
    vsprintf(text, fmt, argptr);                  //Fill the new buffer
    return TcpBufAddText(text);                   //Add the text
}
int TcpBufAddF(char *fmt, ...)
{
    va_list argptr;
    va_start(argptr, fmt);
    int size = TcpBufAddV(fmt, argptr);
    va_end(argptr);
    return size;
}
void TcpBufAddData(const char* data, int length)
{
    while (length > 0)
    {
        if (currentPositionIsInBuffer()) *p++ = *data;
        data++;
        currentPositionInMessage++;
        length--;
    }
}
void TcpBufAddStream(void (*startFunction)(void), int (*enumerateFunction)(void))
{
    startFunction();
    while (true)
    {
        int c = enumerateFunction();
        if (c == EOF) break;
        if (currentPositionIsInBuffer()) *p++ = c;
        currentPositionInMessage++;
    }
}