bool Log_Writer::loginit(LogLevel l, const char *filelocation, bool append, bool issync)
{
MACRO_RET(NULL != fp, false);
m_system_level = l;
m_isappend = append;
m_issync = issync;
if(strlen(filelocation) >= (sizeof(m_filelocation) -1))
{
fprintf(stderr, "the path of log file is too long:%d limit:%d\n", strlen(filelocation), sizeof(m_filelocation) -1);
exit(0);
}
//本地存储filelocation 以防止在栈上的非法调用调用
strncpy(m_filelocation, filelocation, sizeof(m_filelocation));
m_filelocation[sizeof(m_filelocation) -1] = '\0';
if('\0' == m_filelocation[0])
{
fp = stdout;
fprintf(stderr, "now all the running-information are going to put to stderr\n");
return true;
}
fp = fopen(m_filelocation, append ? "a":"w");
if(fp == NULL)
{
fprintf(stderr, "cannot open log file,file location is %s\n", m_filelocation);
exit(0);
}
//setvbuf (fp, io_cached_buf, _IOLBF, sizeof(io_cached_buf)); //buf set _IONBF _IOLBF _IOFBF
setvbuf (fp, (char *)NULL, _IOLBF, 0);
fprintf(stderr, "now all the running-information are going to the file %s\n", m_filelocation);
return true;
}
bool LogWriter::log(LogLevel l, const char* logformat,...) {
MACRO_RET(!checklevel(l), false);
char * start = m_buffer;
int size = premakestr(start, l);
va_list args;
va_start(args, logformat);
size += vsnprintf(start+size, M_LOG_BUFFSIZE-size, logformat, args);
va_end(args);
if(m_verbose)
fprintf(stderr, "%s", m_buffer);
if(fp)
write(m_buffer, size);
return true;
}
bool Log_Writer::log(LogLevel l, char* logformat,...)
{
MACRO_RET(!checklevel(l), false);
int _size;
int prestrlen = 0;
char * star = m_buffer;
prestrlen = premakestr(star, l);
star += prestrlen;
va_list args;
va_start(args, logformat);
_size = vsnprintf(star, _LOG_BUFFSIZE - prestrlen, logformat, args);
va_end(args);
if(NULL == fp)
fprintf(stderr, "%s", m_buffer);
else
_write(m_buffer, prestrlen + _size);
return true;
}
