short_types \
tcon \
tlist \
- typesafe_cb
+ typesafe_cb \
+ version
# No external dependencies, with C code:
MODS_NORMAL_WITH_SRC := antithread \
--- /dev/null
+../../licenses/BSD-MIT
\ No newline at end of file
--- /dev/null
+#include <string.h>
+#include "config.h"
+
+/**
+ * version - helper functions for major.minor-style version numbers
+ *
+ * This code provides some helper functions to deal with version numbers in
+ * the form major.minor.
+ *
+ * Author: Peter Hutterer <peter.hutterer@who-t.net>
+ * Maintainer: Peter Hutterer <peter.hutterer@who-t.net>
+ * License: BSD-MIT
+ *
+ * Example:
+ * struct version a = version(1, 0);
+ * struct version b = version(2, 2);
+ *
+ * if (version_cmp(a, b) < 0)
+ * printf("Feature supported in version 2.2 but we have %d.%d\n",
+ * version_major(a), version_minor(a));
+ *
+ * if (version_cmp(a, version(3, 4)) < 0)
+ * printf("Feature only supported in version 3.4\n");
+ *
+ */
+int main(int argc, char *argv[])
+{
+ /* Expect exactly one argument */
+ if (argc != 2)
+ return 1;
+
+ if (strcmp(argv[1], "depends") == 0) {
+ return 0;
+ }
+
+ return 1;
+}
--- /dev/null
+#include <ccan/version/version.h>
+#include <ccan/tap/tap.h>
+
+int main(void)
+{
+#ifdef FAIL
+ struct version a;
+ a = 0; /* no direct assignment */
+#endif
+ return 0;
+}
--- /dev/null
+#include <ccan/version/version.h>
+#include <ccan/tap/tap.h>
+
+int main(void)
+{
+ struct version a, b;
+
+ plan_tests(26);
+
+ /* cmp with normal versions */
+ a = version(1, 0);
+ b = version(2, 0);
+ ok1(version_cmp(a, b) < 0);
+
+ a = version(1, 1);
+ ok1(version_cmp(a, b) < 0);
+
+ a = version(2, 0);
+ ok1(version_cmp(a, b) == 0);
+
+ a = version(2, 1);
+ ok1(version_cmp(a, b) > 0);
+
+ b = version(2, 1);
+ ok1(version_cmp(a, b) == 0);
+
+ a = version(3, 0);
+ ok1(version_cmp(a, b) > 0);
+
+ a = version(3, 1);
+ ok1(version_cmp(a, b) > 0);
+
+ /* inline cmp */
+ ok1(version_cmp(a, version(1, 0)) > 0);
+ ok1(version_cmp(a, version(1, 1)) > 0);
+ ok1(version_cmp(a, version(3, 0)) > 0);
+ ok1(version_cmp(a, version(3, 1)) == 0);
+ ok1(version_cmp(a, version(3, 2)) < 0);
+ ok1(version_cmp(a, version(4, 0)) < 0);
+ ok1(version_cmp(a, version(4, 1)) < 0);
+
+ /* limits */
+ a = version(0xFFFF, 0xFFFF);
+ b = version(0xFFFE, 0xFFFF);
+ ok1(version_cmp(a, b) > 0);
+ ok1(version_cmp(b, a) < 0);
+
+ b = version(0xFFFF, 0xFFFE);
+ ok1(version_cmp(a, b) > 0);
+ ok1(version_cmp(b, a) < 0);
+
+ b = version(0xFFFF, 0xFFFF);
+ ok1(version_cmp(a, b) == 0);
+ ok1(version_cmp(b, a) == 0);
+
+ b = version(0, 1);
+ ok1(version_cmp(a, b) > 0);
+ ok1(version_cmp(b, a) < 0);
+
+ b = version(1, 0);
+ ok1(version_cmp(a, b) > 0);
+ ok1(version_cmp(b, a) < 0);
+
+ b = version(0, 0);
+ ok1(version_cmp(a, b) > 0);
+ ok1(version_cmp(b, a) < 0);
+
+ return exit_status();
+}
--- /dev/null
+/*****************************************************************************
+ *
+ * version - simple version handling functions for major.minor version
+ * types
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ ****************************************************************************/
+
+#ifndef CCAN_VERSION_H
+#define CCAN_VERSION_H
+
+#include <stdint.h>
+
+struct version {
+ uint32_t _v; /* major << 16 | minor */
+};
+
+/**
+ * version_major - return the major version of the given struct
+ * @v: the version number to obtain the major number from
+ */
+static inline uint16_t version_major(struct version v) {
+ return (v._v & 0xFFFF0000) >> 16;
+}
+
+/**
+ * version_minor - return the minor version of the given struct
+ * @v: the version number to obtain the minor number from
+ */
+static inline uint16_t version_minor(const struct version v) {
+ return v._v & 0xFFFF;
+}
+
+/**
+ * version - create a new version number
+ * @major: major version number
+ * @minor: minor version number
+ */
+static inline struct version version(uint16_t major, uint16_t minor)
+{
+ struct version v = { ._v = major << 16 | minor };
+ return v;
+}
+
+/**
+ * version_cmp - compare two versions
+ * @a: the first version number
+ * @b: the second version number
+ * @return a number greater, equal, or less than 0 if a is greater, equal or
+ * less than b, respectively
+ *
+ * Example:
+ * struct version a = version(1, 0);
+ * struct version b = version(1, 3);
+ * if (version_cmp(a, b) < 0)
+ * printf("b is smaller than b\n");
+ */
+static inline int version_cmp(struct version a, struct version b)
+{
+ return (a._v == b._v) ? 0 : (a._v > b._v) ? 1 : - 1;
+}
+
+#endif /* CCAN_VERSION_H */
projects / ccan / commitdiff