diff options
Diffstat (limited to 'payloads/libpayload/libc')
| -rw-r--r-- | payloads/libpayload/libc/Makefile.inc | 3 | ||||
| -rw-r--r-- | payloads/libpayload/libc/lib.c | 51 |
2 files changed, 52 insertions, 2 deletions
diff --git a/payloads/libpayload/libc/Makefile.inc b/payloads/libpayload/libc/Makefile.inc index 2c1ef72564..ee64b60644 100644 --- a/payloads/libpayload/libc/Makefile.inc +++ b/payloads/libpayload/libc/Makefile.inc @@ -28,5 +28,4 @@ ## TARGETS-y += libc/malloc.o libc/printf.o libc/console.o libc/string.o -TARGETS-y += libc/memory.o libc/ctype.o -TARGETS-y += libc/ipchecksum.o +TARGETS-y += libc/memory.o libc/ctype.o libc/ipchecksum.o libc/lib.o diff --git a/payloads/libpayload/libc/lib.c b/payloads/libpayload/libc/lib.c new file mode 100644 index 0000000000..9200455a8a --- /dev/null +++ b/payloads/libpayload/libc/lib.c @@ -0,0 +1,51 @@ +/* + * This file is part of the libpayload project. + * + * Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Convert a number in BCD format to decimal. + * + * @param b The BCD number. + * @return The given BCD number in decimal format. + */ +int bcd2dec(int b) +{ + return ((b >> 4) & 0x0f) * 10 + (b & 0x0f); +} + +/* + * Convert a number in decimal format into the BCD format. + * + * @param d The decimal number. + * @return The given decimal number in BCD format. + */ +int dec2bcd(int d) +{ + return ((d / 10) << 4) | (d % 10); +} + |