From c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b Mon Sep 17 00:00:00 2001 From: David Robillard Date: Thu, 25 Feb 2021 10:27:59 -0500 Subject: Add exess from git@gitlab.com:drobilla/exess.git 4638b1f --- subprojects/exess/src/read_utils.c | 51 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 subprojects/exess/src/read_utils.c (limited to 'subprojects/exess/src/read_utils.c') diff --git a/subprojects/exess/src/read_utils.c b/subprojects/exess/src/read_utils.c new file mode 100644 index 00000000..823fe97f --- /dev/null +++ b/subprojects/exess/src/read_utils.c @@ -0,0 +1,51 @@ +/* + Copyright 2019-2021 David Robillard + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +#include "read_utils.h" +#include "string_utils.h" + +#include "exess/exess.h" + +ExessResult +read_two_digit_number(uint8_t* const out, + const uint8_t min_value, + const uint8_t max_value, + const char* const str) +{ + size_t i = 0; + + // Read digits + size_t d = 0; + for (; d < 2; ++d, ++i) { + if (is_digit(str[i])) { + *out = (uint8_t)((*out * 10) + (str[i] - '0')); + } else { + break; + } + } + + // Ensure there are exactly the expected number of digits + if (d != 2) { + return result(EXESS_EXPECTED_DIGIT, i); + } + + // Ensure value is in range + if (*out < min_value || *out > max_value) { + return result(EXESS_OUT_OF_RANGE, i); + } + + return result(EXESS_SUCCESS, i); +} -- cgit v1.2.1