diff options
Diffstat (limited to 'misc.cc')
| -rw-r--r-- | misc.cc | 64 |
1 files changed, 31 insertions, 33 deletions
@@ -6,46 +6,44 @@ namespace nitrokey { namespace misc { -std::string hexdump(const char *p, size_t size) { - std::stringstream out; - char formatbuf[128]; - const char *pstart = p; - - for (const char *pend = p + size; p < pend;) { - snprintf(formatbuf, 128, "%04x\t", p - pstart); - out << formatbuf; - - for (const char *le = p + 16; p < le && p < pend; p++) { - snprintf(formatbuf, 128, "%02x ", uint8_t(*p)); - out << formatbuf; - } - out << std::endl; - } - return out.str(); +std::string hexdump(const char *p, size_t size) { + std::stringstream out; + char formatbuf[128]; + const char *pstart = p; + + for (const char *pend = p + size; p < pend;) { + snprintf(formatbuf, 128, "%04x\t", p - pstart); + out << formatbuf; + + for (const char *le = p + 16; p < le && p < pend; p++) { + snprintf(formatbuf, 128, "%02x ", uint8_t(*p)); + out << formatbuf; + } + out << std::endl; + } + return out.str(); } -static uint32_t _crc32 (uint32_t crc, uint32_t data) -{ - int i; - crc = crc ^ data; +static uint32_t _crc32(uint32_t crc, uint32_t data) { + int i; + crc = crc ^ data; - for (i = 0; i < 32; i++) { - if (crc & 0x80000000) - crc = (crc << 1) ^ 0x04C11DB7; // polynomial used in STM32 - else - crc = (crc << 1); - } + for (i = 0; i < 32; i++) { + if (crc & 0x80000000) + crc = (crc << 1) ^ 0x04C11DB7; // polynomial used in STM32 + else + crc = (crc << 1); + } - return crc; + return crc; } uint32_t stm_crc32(const uint8_t *data, size_t size) { - uint32_t crc = 0xffffffff; - const uint32_t *pend = (const uint32_t *)(data + size); - for (const uint32_t *p = (const uint32_t *)(data); p < pend; p++) - crc = _crc32(crc, *p); - return crc; + uint32_t crc = 0xffffffff; + const uint32_t *pend = (const uint32_t *)(data + size); + for (const uint32_t *p = (const uint32_t *)(data); p < pend; p++) + crc = _crc32(crc, *p); + return crc; } - } } |