context.c

一个很不错的GPS接收机源程序

#include <atmel/AT89X51.H>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include "LCD_Library.h"

#include "context.h"

nmeaPROPERTY * nmea_property()
{
    static nmeaPROPERTY prop = {
        0, 0, NMEA_DEF_PARSEBUFF
        };

    return &prop;
}

void nmea_trace(const char *str, ...)
{
    int size;
    va_list arg_list;
    char buff[NMEA_DEF_PARSEBUFF];
    nmeaTraceFunc func = nmea_property()->trace_func;

    if(func)
    {
        va_start(arg_list, str);
        size = NMEA_POSIX(LCD_mini_printf)(&buff[0], NMEA_DEF_PARSEBUFF - 1, str, arg_list);
        va_end(arg_list);

        if(size > 0)
            (*func)(&buff[0], size);
    }
}

void nmea_trace_buff(const char *buff, int buff_size)
{
    nmeaTraceFunc func = nmea_property()->trace_func;
    if(func && buff_size)
        (*func)(buff, buff_size);
}

void nmea_error(const char *str, ...)
{
    int size;
    va_list arg_list;
    char buff[NMEA_DEF_PARSEBUFF];
    nmeaErrorFunc func = nmea_property()->error_func;

    if(func)
    {
        va_start(arg_list, str);
        size = NMEA_POSIX(LCD_mini_printf)(&buff[0], NMEA_DEF_PARSEBUFF - 1, str, arg_list);
        va_end(arg_list);

        if(size > 0)
            (*func)(&buff[0], size);
    }
}