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107 lines
2.5 KiB
107 lines
2.5 KiB
3 years ago
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/* PDCurses */
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#include <curspriv.h>
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/*man-start**************************************************************
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debug
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-----
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### Synopsis
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void traceon(void);
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void traceoff(void);
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void PDC_debug(const char *, ...);
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### Description
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traceon() and traceoff() toggle the recording of debugging
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information to the file "trace". Although not standard, similar
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functions are in some other curses implementations.
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PDC_debug() is the function that writes to the file, based on whether
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traceon() has been called. It's used from the PDC_LOG() macro.
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The environment variable PDC_TRACE_FLUSH controls whether the trace
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file contents are fflushed after each write. The default is not. Set
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it to enable this (may affect performance).
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### Portability
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X/Open ncurses NetBSD
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traceon - - -
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traceoff - - -
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PDC_debug - - -
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**man-end****************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <time.h>
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static bool want_fflush = FALSE;
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void PDC_debug(const char *fmt, ...)
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{
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va_list args;
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char hms[9];
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time_t now;
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if (!SP || !SP->dbfp)
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return;
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time(&now);
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strftime(hms, 9, "%H:%M:%S", localtime(&now));
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fprintf(SP->dbfp, "At: %8.8ld - %s ", (long) clock(), hms);
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va_start(args, fmt);
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vfprintf(SP->dbfp, fmt, args);
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va_end(args);
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/* If you are crashing and losing debugging information, enable this
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by setting the environment variable PDC_TRACE_FLUSH. This may
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impact performance. */
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if (want_fflush)
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fflush(SP->dbfp);
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/* If with PDC_TRACE_FLUSH enabled you are still losing logging in
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crashes, you may need to add a platform-dependent mechanism to
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flush the OS buffers as well (such as fsync() on POSIX) -- but
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expect terrible performance. */
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}
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void traceon(void)
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{
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if (!SP)
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return;
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if (SP->dbfp)
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fclose(SP->dbfp);
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/* open debug log file append */
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SP->dbfp = fopen("trace", "a");
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if (!SP->dbfp)
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{
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fprintf(stderr, "PDC_debug(): Unable to open debug log file\n");
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return;
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}
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if (getenv("PDC_TRACE_FLUSH"))
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want_fflush = TRUE;
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PDC_LOG(("traceon() - called\n"));
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}
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void traceoff(void)
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{
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if (!SP || !SP->dbfp)
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return;
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PDC_LOG(("traceoff() - called\n"));
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fclose(SP->dbfp);
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SP->dbfp = NULL;
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want_fflush = FALSE;
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}
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