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authorDavid Robillard <d@drobilla.net>2021-02-25 10:27:59 -0500
committerDavid Robillard <d@drobilla.net>2021-03-08 23:23:05 -0500
commitc4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b (patch)
treea62995534f5f606ac2f8bae22d525532b824cb5e /subprojects/exess/src/string_utils.h
parent6bcd18ae60482790b645a345f718e7099250f261 (diff)
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Add exess from git@gitlab.com:drobilla/exess.git 4638b1f
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+/*
+ Copyright 2011-2021 David Robillard <d@drobilla.net>
+
+ 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.
+*/
+
+#ifndef EXESS_STRING_UTILS_H
+#define EXESS_STRING_UTILS_H
+
+#include <stdbool.h>
+
+/// Return true if `c` lies within [`min`...`max`] (inclusive)
+static inline bool
+in_range(const int c, const int min, const int max)
+{
+ return (c >= min && c <= max);
+}
+
+/// Return true if `c` is a whitespace character
+static inline bool
+is_space(const int c)
+{
+ switch (c) {
+ case ' ':
+ case '\f':
+ case '\n':
+ case '\r':
+ case '\t':
+ case '\v':
+ return true;
+ default:
+ return false;
+ }
+}
+
+/// ALPHA ::= [A-Za-z]
+static inline bool
+is_alpha(const int c)
+{
+ return in_range(c, 'A', 'Z') || in_range(c, 'a', 'z');
+}
+
+/// DIGIT ::= [0-9]
+static inline bool
+is_digit(const int c)
+{
+ return in_range(c, '0', '9');
+}
+
+/// HEXDIG ::= DIGIT | "A" | "B" | "C" | "D" | "E" | "F"
+static inline bool
+is_hexdig(const int c)
+{
+ return is_digit(c) || in_range(c, 'A', 'F');
+}
+
+/// BASE64 ::= ALPHA | DIGIT | "+" | "/" | "="
+static inline bool
+is_base64(const int c)
+{
+ return is_alpha(c) || is_digit(c) || c == '+' || c == '/' || c == '=';
+}
+
+#endif // EXESS_STRING_UTILS_H