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- /* sd2snes - SD card based universal cartridge for the SNES
- Copyright (C) 2009-2010 Maximilian Rehkopf <otakon@gmx.net>
- This file was adapted from sd2iec, written by Ingo Korb.
- Original copyright header follows:
- */
- /* sd2iec - SD/MMC to Commodore serial bus interface/controller
- Copyright (C) 2007-2009 Ingo Korb <ingo@akana.de>
- Inspiration and low-level SD/MMC access based on code from MMC2IEC
- by Lars Pontoppidan et al., see sdcard.c|h and config.h.
- FAT filesystem access based on code from ChaN and Jim Brain, see ff.c|h.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License only.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- utils.c: Misc. utility functions that didn't fit elsewhere
- */
- #include <stdint.h>
- #include "ustring.h"
- uint8_t *appendnumber(uint8_t *msg, uint8_t value) {
- if (value >= 100) {
- *msg++ = '0' + value/100;
- value %= 100;
- }
- *msg++ = '0' + value/10;
- *msg++ = '0' + value%10;
- return msg;
- }
- /* Convert a one-byte BCD value to a normal integer */
- uint8_t bcd2int(uint8_t value) {
- return (value & 0x0f) + 10*(value >> 4);
- }
- /* Convert a uint8_t into a BCD value */
- uint8_t int2bcd(uint8_t value) {
- return (value % 10) + 16*(value/10);
- }
- /* Similiar to strtok_r, but only a single delimiting character */
- uint8_t *ustr1tok(uint8_t *str, const uint8_t delim, uint8_t **saveptr) {
- uint8_t *tmp;
- if (str == NULL)
- str = *saveptr;
- /* Skip leading delimiters */
- while (*str == delim) str++;
- /* If there is anything left... */
- if (*str) {
- /* Search for the next delimiter */
- tmp = str;
- while (*tmp && *tmp != delim) tmp++;
- /* Terminate the string there */
- if (*tmp != 0)
- *tmp++ = 0;
- *saveptr = tmp;
- return str;
- } else
- return NULL;
- }
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