Amiga Plus 2002 #11/Amiga Plus CD - 2002 - No. 11.iso/Tools/Development/ncurses-5.3/ncurses/trace/lib_trace.c

C/C++ Source or Header | 2002-10-27 | 5.6 KB | 181 lines

/****************************************************************************
 * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc.              *
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 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
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 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <[e-mail]> 1992,1995               *
 *     and: Eric S. Raymond <[e-mail]>                         *
 ****************************************************************************/

/*
 *    lib_trace.c - Tracing/Debugging routines
 */

#include <curses.priv.h>
#include <tic.h>

#include <ctype.h>

MODULE_ID("$Id: lib_trace.c,v 1.50 2002/10/12 15:20:15 tom Exp $")

NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0;    /* always define this */

#ifdef TRACE
NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace = "";
NCURSES_EXPORT_VAR(long) _nc_outchars = 0;

static FILE *tracefp;        /* default to writing to stderr */

NCURSES_EXPORT(void)
trace(const unsigned int tracelevel GCC_UNUSED)
{
    static bool been_here = FALSE;
    static char my_name[] = "trace";

    if (!been_here && tracelevel) {
    been_here = TRUE;

    _nc_tracing = tracelevel;
    if (_nc_access(my_name, W_OK) < 0
        || (tracefp = fopen(my_name, "wb")) == 0) {
        perror("curses: Can't open 'trace' file: ");
        exit(EXIT_FAILURE);
    }
    /* Try to set line-buffered mode, or (failing that) unbuffered,
     * so that the trace-output gets flushed automatically at the
     * end of each line.  This is useful in case the program dies.
     */
#if HAVE_SETVBUF        /* ANSI */
    (void) setvbuf(tracefp, (char *) 0, _IOLBF, 0);
#elif HAVE_SETBUF        /* POSIX */
    (void) setbuffer(tracefp, (char *) 0);
#endif
    _tracef("TRACING NCURSES version %s (tracelevel=%#x)",
        curses_version(), tracelevel);
    } else if (_nc_tracing != tracelevel) {
    _nc_tracing = tracelevel;
    _tracef("tracelevel=%#x", tracelevel);
    }
}

NCURSES_EXPORT(void)
_tracef(const char *fmt,...)
{
    static const char Called[] = T_CALLED("");
    static const char Return[] = T_RETURN("");
    static int level;
    va_list ap;
    bool before = FALSE;
    bool after = FALSE;
    int doit = _nc_tracing;
    int save_err = errno;

    if (strlen(fmt) >= sizeof(Called) - 1) {
    if (!strncmp(fmt, Called, sizeof(Called) - 1)) {
        before = TRUE;
        level++;
    } else if (!strncmp(fmt, Return, sizeof(Return) - 1)) {
        after = TRUE;
    }
    if (before || after) {
        if ((level <= 1)
        || (doit & TRACE_ICALLS) != 0)
        doit &= (TRACE_CALLS | TRACE_CCALLS);
        else
        doit = 0;
    }
    }

    if (doit != 0) {
    if (tracefp == 0)
        tracefp = stderr;
    if (before || after) {
        int n;
        for (n = 1; n < level; n++)
        fputs("+ ", tracefp);
    }
    va_start(ap, fmt);
    vfprintf(tracefp, fmt, ap);
    fputc('\n', tracefp);
    va_end(ap);
    fflush(tracefp);
    }

    if (after && level)
    level--;
    errno = save_err;
}

/* Trace 'bool' return-values */
NCURSES_EXPORT(NCURSES_BOOL)
_nc_retrace_bool(NCURSES_BOOL code)
{
    T((T_RETURN("%s"), code ? "TRUE" : "FALSE"));
    return code;
}

/* Trace 'int' return-values */
NCURSES_EXPORT(int)
_nc_retrace_int(int code)
{
    T((T_RETURN("%d"), code));
    return code;
}

/* Trace 'unsigned' return-values */
NCURSES_EXPORT(unsigned)
_nc_retrace_unsigned(unsigned code)
{
    T((T_RETURN("%#x"), code));
    return code;
}

/* Trace 'char*' return-values */
NCURSES_EXPORT(char *)
_nc_retrace_ptr(char *code)
{
    T((T_RETURN("%s"), _nc_visbuf(code)));
    return code;
}

/* Trace 'SCREEN *' return-values */
NCURSES_EXPORT(SCREEN *)
_nc_retrace_sp(SCREEN * code)
{
    T((T_RETURN("%p"), code));
    return code;
}

/* Trace 'WINDOW *' return-values */
NCURSES_EXPORT(WINDOW *)
_nc_retrace_win(WINDOW *code)
{
    T((T_RETURN("%p"), code));
    return code;
}
#endif /* TRACE */