root/trunk/src/libopensc/log.c

/*
 * log.c: Miscellaneous logging functions
 *
 * Copyright (C) 2001, 2002  Juha YrjölÀ <juha.yrjola@iki.fi>
 * Copyright (C) 2003  Antti Tapaninen <aet@cc.hut.fi>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "internal.h"
#include <stdarg.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_IO_H
#include <io.h>
#endif

/* Although not used, we need this for consistent exports */
void _sc_error(sc_context_t *ctx, const char *format, ...)
{
        va_list ap;

        va_start(ap, format);
        sc_do_log_va(ctx, SC_LOG_TYPE_ERROR, NULL, 0, NULL, format, ap);
        va_end(ap);
}

/* Although not used, we need this for consistent exports */
void _sc_debug(sc_context_t *ctx, const char *format, ...)
{
        va_list ap;

        va_start(ap, format);
        sc_do_log_va(ctx, SC_LOG_TYPE_DEBUG, NULL, 0, NULL, format, ap);
        va_end(ap);
}

void sc_do_log(sc_context_t *ctx, int type, const char *file, int line, const char *func, const char *format, ...)
{
        va_list ap;

        va_start(ap, format);
        sc_do_log_va(ctx, type, file, line, func, format, ap);
        va_end(ap);
}

void sc_do_log_va(sc_context_t *ctx, int type, const char *file, int line, const char *func, const char *format, va_list args)
{
        int     (*display_fn)(sc_context_t *, const char *);
        char    buf[1836], *p;
        const char *tag = "";
        int     r;
        size_t  left;

        assert(ctx != NULL);

        switch (type) {
        case SC_LOG_TYPE_ERROR:
                if (!ctx->suppress_errors) {
                        display_fn = &sc_ui_display_error;
                        tag = "error:";
                        break;
                }
                /* Fall thru - suppressed errors are logged as
                 * debug messages */
                tag = "error (suppressed):";
                type = SC_LOG_TYPE_DEBUG;

        case SC_LOG_TYPE_DEBUG:
                if (ctx->debug == 0)
                        return;
                display_fn = &sc_ui_display_debug;
                break;

        default:
                return;
        }

        if (file != NULL) {
                r = snprintf(buf, sizeof(buf), "[%s] %s:%d:%s: ", 
                        ctx->app_name, file, line, func ? func : "");
                if (r < 0 || (unsigned int)r > sizeof(buf))
                        return;
        } else {
                r = 0;
        }
        p = buf + r;
        left = sizeof(buf) - r;

        r = vsnprintf(p, left, format, args);
        if (r < 0)
                return;
        p += r;
        left -= r;

        display_fn(ctx, buf);
}

void sc_hex_dump(sc_context_t *ctx, const u8 * in, size_t count, char *buf, size_t len)
{
        char *p = buf;
        int lines = 0;

        assert(buf != NULL && in != NULL);
        buf[0] = 0;
        if ((count * 5) > len)
                return;
        while (count) {
                char ascbuf[17];
                size_t i;

                for (i = 0; i < count && i < 16; i++) {
                        sprintf(p, "%02X ", *in);
                        if (isprint(*in))
                                ascbuf[i] = *in;
                        else
                                ascbuf[i] = '.';
                        p += 3;
                        in++;
                }
                count -= i;
                ascbuf[i] = 0;
                for (; i < 16 && lines; i++) {
                        strcat(p, "   ");
                        p += 3;
                }
                strcat(p, ascbuf);
                p += strlen(p);
                sprintf(p, "\n");
                p++;
                lines++;
        }
}