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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
commitb750101eb236130cf056c675997decbac904cc49 (patch)
treea5df1a06754bdd014cb975c051c83b01c9a97532 /src/basic/percent-util.h
parentInitial commit. (diff)
downloadsystemd-b750101eb236130cf056c675997decbac904cc49.tar.xz
systemd-b750101eb236130cf056c675997decbac904cc49.zip
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--src/basic/percent-util.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/basic/percent-util.h b/src/basic/percent-util.h
new file mode 100644
index 0000000..e975d6e
--- /dev/null
+++ b/src/basic/percent-util.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <errno.h>
+#include <inttypes.h>
+
+#include "macro.h"
+
+int parse_percent_unbounded(const char *p);
+int parse_percent(const char *p);
+
+int parse_permille_unbounded(const char *p);
+int parse_permille(const char *p);
+
+int parse_permyriad_unbounded(const char *p);
+int parse_permyriad(const char *p);
+
+/* Some macro-like helpers that convert a percent/permille/permyriad value (as parsed by parse_percent()) to
+ * a value relative to 100% == 2^32-1. Rounds to closest. */
+static inline uint32_t UINT32_SCALE_FROM_PERCENT(int percent) {
+ assert_cc(INT_MAX <= UINT32_MAX);
+
+ return (uint32_t) (((uint64_t) CLAMP(percent, 0, 100) * UINT32_MAX + 50) / 100U);
+}
+
+static inline uint32_t UINT32_SCALE_FROM_PERMILLE(int permille) {
+ return (uint32_t) (((uint64_t) CLAMP(permille, 0, 1000) * UINT32_MAX + 500) / 1000U);
+}
+
+static inline uint32_t UINT32_SCALE_FROM_PERMYRIAD(int permyriad) {
+ return (uint32_t) (((uint64_t) CLAMP(permyriad, 0, 10000) * UINT32_MAX + 5000) / 10000U);
+}
+
+static inline int UINT32_SCALE_TO_PERCENT(uint32_t scale) {
+ uint32_t u;
+
+ u = (uint32_t) ((((uint64_t) scale) * 100U + UINT32_MAX/2) / UINT32_MAX);
+ if (u > INT_MAX)
+ return -ERANGE;
+
+ return (int) u;
+}
+
+static inline int UINT32_SCALE_TO_PERMILLE(uint32_t scale) {
+ uint32_t u;
+
+ u = (uint32_t) ((((uint64_t) scale) * 1000U + UINT32_MAX/2) / UINT32_MAX);
+ if (u > INT_MAX)
+ return -ERANGE;
+
+ return (int) u;
+}
+
+static inline int UINT32_SCALE_TO_PERMYRIAD(uint32_t scale) {
+ uint32_t u;
+
+ u = (uint32_t) ((((uint64_t) scale) * 10000U + UINT32_MAX/2) / UINT32_MAX);
+ if (u > INT_MAX)
+ return -ERANGE;
+
+ return (int) u;
+}
+
+#define PERMYRIAD_AS_PERCENT_FORMAT_STR "%i.%02i%%"
+#define PERMYRIAD_AS_PERCENT_FORMAT_VAL(x) ((x)/100), ((x)%100)