93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
// ***TODO*** On DOS, open and close the log on every write so the file gets updated and we still have data on a crash.
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#include "log.h"
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static FILE *_log = NULL;
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static uint8_t _ourHandle = 0;
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static char *_logBuffer = NULL;
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static uint16_t _logBufferSize = 0;
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static logCallback _logCallback = NULL;
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void logCallbackSet(logCallback callback) {
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_logCallback = callback;
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}
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void logClose(void) {
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if (_log && _ourHandle) {
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fclose(_log);
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_ourHandle = 0;
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}
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DEL(_logBuffer);
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}
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uint8_t logOpen(char *filename, uint8_t append) {
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_log = fopen(filename, append ? "a" : "w");
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if (_log) {
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_ourHandle = 1;
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return 1;
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}
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return 0;
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}
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void logOpenByHandle(FILE *handle) {
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_log = handle;
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}
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void logWrite(char *format, ...) {
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va_list args = { 0 };
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va_list args2 = { 0 };
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uint16_t length = 0;
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if (_log) {
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va_start(args, format);
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va_copy(args2, args);
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// Attempt to write into current log buffer.
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length = vsnprintf(_logBuffer, _logBufferSize, format, args);
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// Did it fit?
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if (length >= _logBufferSize) {
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// Nope. Resize buffer to fit plus a bit more.
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if (_logBuffer) free(_logBuffer);
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_logBufferSize = length + 32;
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_logBuffer = (char *)malloc(_logBufferSize);
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// Do it again.
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vsnprintf(_logBuffer, _logBufferSize, format, args2);
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}
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//#ifdef __linux__
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// Also output to stdout on Linux.
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fprintf(stdout, "%s", _logBuffer);
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fflush(stdout);
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//#endif
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if (_logCallback) _logCallback(_logBuffer);
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fprintf(_log, "%s", _logBuffer);
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fflush(_log);
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va_end(args2);
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va_end(args);
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}
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}
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void logWriteToFileOnly(char *format, ...) {
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va_list args;
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va_start(args, format);
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if (_log) {
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vfprintf(_log, format, args);
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fflush(_log);
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}
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va_end(args);
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}
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