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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/basic/percent-util.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.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.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/basic/percent-util.c b/src/basic/percent-util.c new file mode 100644 index 0000000..cab9d0e --- /dev/null +++ b/src/basic/percent-util.c @@ -0,0 +1,157 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "percent-util.h" +#include "string-util.h" +#include "parse-util.h" + +static int parse_parts_value_whole(const char *p, const char *symbol) { + const char *pc, *n; + int r, v; + + pc = endswith(p, symbol); + if (!pc) + return -EINVAL; + + n = strndupa_safe(p, pc - p); + r = safe_atoi(n, &v); + if (r < 0) + return r; + if (v < 0) + return -ERANGE; + + return v; +} + +static int parse_parts_value_with_tenths_place(const char *p, const char *symbol) { + const char *pc, *dot, *n; + int r, q, v; + + pc = endswith(p, symbol); + if (!pc) + return -EINVAL; + + dot = memchr(p, '.', pc - p); + if (dot) { + if (dot + 2 != pc) + return -EINVAL; + if (dot[1] < '0' || dot[1] > '9') + return -EINVAL; + q = dot[1] - '0'; + n = strndupa_safe(p, dot - p); + } else { + q = 0; + n = strndupa_safe(p, pc - p); + } + r = safe_atoi(n, &v); + if (r < 0) + return r; + if (v < 0) + return -ERANGE; + if (v > (INT_MAX - q) / 10) + return -ERANGE; + + v = v * 10 + q; + return v; +} + +static int parse_parts_value_with_hundredths_place(const char *p, const char *symbol) { + const char *pc, *dot, *n; + int r, q, v; + + pc = endswith(p, symbol); + if (!pc) + return -EINVAL; + + dot = memchr(p, '.', pc - p); + if (dot) { + if (dot + 3 == pc) { + /* Support two places after the dot */ + + if (dot[1] < '0' || dot[1] > '9' || dot[2] < '0' || dot[2] > '9') + return -EINVAL; + q = (dot[1] - '0') * 10 + (dot[2] - '0'); + + } else if (dot + 2 == pc) { + /* Support one place after the dot */ + + if (dot[1] < '0' || dot[1] > '9') + return -EINVAL; + q = (dot[1] - '0') * 10; + } else + /* We do not support zero or more than two places */ + return -EINVAL; + + n = strndupa_safe(p, dot - p); + } else { + q = 0; + n = strndupa_safe(p, pc - p); + } + r = safe_atoi(n, &v); + if (r < 0) + return r; + if (v < 0) + return -ERANGE; + if (v > (INT_MAX - q) / 100) + return -ERANGE; + + v = v * 100 + q; + return v; +} + +int parse_percent_unbounded(const char *p) { + return parse_parts_value_whole(p, "%"); +} + +int parse_percent(const char *p) { + int v; + + v = parse_percent_unbounded(p); + if (v > 100) + return -ERANGE; + + return v; +} + +int parse_permille_unbounded(const char *p) { + const char *pm; + + pm = endswith(p, "‰"); + if (pm) + return parse_parts_value_whole(p, "‰"); + + return parse_parts_value_with_tenths_place(p, "%"); +} + +int parse_permille(const char *p) { + int v; + + v = parse_permille_unbounded(p); + if (v > 1000) + return -ERANGE; + + return v; +} + +int parse_permyriad_unbounded(const char *p) { + const char *pm; + + pm = endswith(p, "‱"); + if (pm) + return parse_parts_value_whole(p, "‱"); + + pm = endswith(p, "‰"); + if (pm) + return parse_parts_value_with_tenths_place(p, "‰"); + + return parse_parts_value_with_hundredths_place(p, "%"); +} + +int parse_permyriad(const char *p) { + int v; + + v = parse_permyriad_unbounded(p); + if (v > 10000) + return -ERANGE; + + return v; +} |