diff --git a/quantum/quantum.c b/quantum/quantum.c index c7a3bb19707c..ba3ae0345771 100644 --- a/quantum/quantum.c +++ b/quantum/quantum.c @@ -572,3 +572,59 @@ __attribute__((weak)) void suspend_wakeup_init_quantum(void) { #endif suspend_wakeup_init_kb(); } + +/** \brief converts unsigned integers into char arrays + * + * Takes an unsigned integer and converts that value into an equivalent char array + * A padding character may be specified, ' ' for leading spaces, '0' for leading zeros. + */ + +const char *get_numeric_str(char *buf, size_t buf_len, uint32_t curr_num, char curr_pad) { + buf[buf_len - 1] = '\0'; + for (size_t i = 0; i < buf_len - 1; ++i) { + char c = '0' + curr_num % 10; + buf[buf_len - 2 - i] = (c == '0' && i == 0) ? '0' : (curr_num > 0 ? c : curr_pad); + curr_num /= 10; + } + return buf; +} + +/** \brief converts uint8_t into char array + * + * Takes an uint8_t, and uses an internal static buffer to render that value into a char array + * A padding character may be specified, ' ' for leading spaces, '0' for leading zeros. + * + * NOTE: Subsequent invocations will reuse the same static buffer and overwrite the previous + * contents. Use the result immediately, instead of caching it. + */ +const char *get_u8_str(uint8_t curr_num, char curr_pad) { + static char buf[4] = {0}; + static uint8_t last_num = 0xFF; + static char last_pad = '\0'; + if (last_num == curr_num && last_pad == curr_pad) { + return buf; + } + last_num = curr_num; + last_pad = curr_pad; + return get_numeric_str(buf, sizeof(buf), curr_num, curr_pad); +} + +/** \brief converts uint16_t into char array + * + * Takes an uint16_t, and uses an internal static buffer to render that value into a char array + * A padding character may be specified, ' ' for leading spaces, '0' for leading zeros. + * + * NOTE: Subsequent invocations will reuse the same static buffer and overwrite the previous + * contents. Use the result immediately, instead of caching it. + */ +const char *get_u16_str(uint16_t curr_num, char curr_pad) { + static char buf[6] = {0}; + static uint16_t last_num = 0xFF; + static char last_pad = '\0'; + if (last_num == curr_num && last_pad == curr_pad) { + return buf; + } + last_num = curr_num; + last_pad = curr_pad; + return get_numeric_str(buf, sizeof(buf), curr_num, curr_pad); +} diff --git a/quantum/quantum.h b/quantum/quantum.h index b34ff6ec51bb..45050ac0eae1 100644 --- a/quantum/quantum.h +++ b/quantum/quantum.h @@ -245,3 +245,7 @@ void led_set_user(uint8_t usb_led); void led_set_kb(uint8_t usb_led); bool led_update_user(led_t led_state); bool led_update_kb(led_t led_state); + +const char *get_numeric_str(char *buf, size_t buf_len, uint32_t curr_num, char curr_pad); +const char *get_u8_str(uint8_t curr_num, char curr_pad); +const char *get_u16_str(uint16_t curr_num, char curr_pad);