111 lines
2.2 KiB
C++
111 lines
2.2 KiB
C++
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#include "CLog.h"
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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//
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// CLog
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//
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void CLog::print(const char* fmt, ...)
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{
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// check if fmt begins with a priority argument
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int priority = 4;
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if (fmt[0] == '%' && fmt[1] == 'z') {
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priority = fmt[2] - '\060';
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fmt += 3;
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}
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// print to buffer
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char stack[1024];
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va_list args;
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va_start(args, fmt);
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char* buffer = vsprint(0, stack,
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sizeof(stack) / sizeof(stack[0]), fmt, args);
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va_end(args);
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// output buffer
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output(priority, buffer);
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// clean up
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if (buffer != stack)
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delete[] buffer;
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}
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void CLog::printt(const char* file, int line,
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const char* fmt, ...)
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{
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// check if fmt begins with a priority argument
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int priority = 4;
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if (fmt[0] == '%' && fmt[1] == 'z') {
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priority = fmt[2] - '\060';
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fmt += 3;
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}
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// compute prefix padding length
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char stack[1024];
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sprintf(stack, "%d", line);
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int pad = strlen(file) + 1 + strlen(stack) + 1 + 1;
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// print to buffer
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va_list args;
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va_start(args, fmt);
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char* buffer = vsprint(pad, stack,
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sizeof(stack) / sizeof(stack[0]), fmt, args);
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va_end(args);
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// print the prefix to the buffer
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sprintf(buffer, "%s,%d:", file, line);
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buffer[pad - 1] = ' ';
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// output buffer
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output(priority, buffer);
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// clean up
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if (buffer != stack)
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delete[] buffer;
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}
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void CLog::output(int priority, const char* msg)
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{
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static const char* s_priority[] = {
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"FATAL",
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"ERROR",
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"WARNING",
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"NOTE",
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"INFO",
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"DEBUG",
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};
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assert(priority >= 0 && priority < (int)(sizeof(s_priority) /
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sizeof(s_priority[0])));
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assert(msg != 0);
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fprintf(stderr, "%s: %s\n", s_priority[priority], msg);
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}
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char* CLog::vsprint(int pad, char* buffer, int len,
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const char* fmt, va_list args)
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{
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assert(len > 0);
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// try writing to input buffer
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int n;
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if (len >= pad) {
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n = vsnprintf(buffer + pad, len - pad, fmt, args);
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if (n != -1 && n <= len - pad)
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return buffer;
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}
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// start allocating buffers until we write the whole string
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buffer = 0;
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do {
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delete[] buffer;
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len *= 2;
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buffer = new char[len + pad];
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n = vsnprintf(buffer + pad, len - pad, fmt, args);
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} while (n == -1 || n > len - pad);
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return buffer;
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}
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