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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/parse-util.h | |
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/parse-util.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/basic/parse-util.h b/src/basic/parse-util.h new file mode 100644 index 0000000..8d8d523 --- /dev/null +++ b/src/basic/parse-util.h @@ -0,0 +1,152 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include <inttypes.h> +#include <limits.h> +#include <stddef.h> +#include <stdint.h> +#include <sys/types.h> + +#include "macro.h" + +typedef unsigned long loadavg_t; + +int parse_boolean(const char *v) _pure_; +int parse_pid(const char *s, pid_t* ret_pid); +int parse_mode(const char *s, mode_t *ret); +int parse_ifindex(const char *s); +int parse_mtu(int family, const char *s, uint32_t *ret); + +int parse_size(const char *t, uint64_t base, uint64_t *size); +int parse_range(const char *t, unsigned *lower, unsigned *upper); +int parse_errno(const char *t); + +#define SAFE_ATO_REFUSE_PLUS_MINUS (1U << 30) +#define SAFE_ATO_REFUSE_LEADING_ZERO (1U << 29) +#define SAFE_ATO_REFUSE_LEADING_WHITESPACE (1U << 28) +#define SAFE_ATO_ALL_FLAGS (SAFE_ATO_REFUSE_PLUS_MINUS|SAFE_ATO_REFUSE_LEADING_ZERO|SAFE_ATO_REFUSE_LEADING_WHITESPACE) +#define SAFE_ATO_MASK_FLAGS(base) ((base) & ~SAFE_ATO_ALL_FLAGS) + +int safe_atou_full(const char *s, unsigned base, unsigned *ret_u); + +static inline int safe_atou(const char *s, unsigned *ret_u) { + return safe_atou_full(s, 0, ret_u); +} + +int safe_atoi(const char *s, int *ret_i); +int safe_atolli(const char *s, long long int *ret_i); + +int safe_atou8_full(const char *s, unsigned base, uint8_t *ret); + +static inline int safe_atou8(const char *s, uint8_t *ret) { + return safe_atou8_full(s, 0, ret); +} + +int safe_atou16_full(const char *s, unsigned base, uint16_t *ret); + +static inline int safe_atou16(const char *s, uint16_t *ret) { + return safe_atou16_full(s, 0, ret); +} + +static inline int safe_atoux16(const char *s, uint16_t *ret) { + return safe_atou16_full(s, 16, ret); +} + +int safe_atoi16(const char *s, int16_t *ret); + +static inline int safe_atou32_full(const char *s, unsigned base, uint32_t *ret_u) { + assert_cc(sizeof(uint32_t) == sizeof(unsigned)); + return safe_atou_full(s, base, (unsigned*) ret_u); +} + +static inline int safe_atou32(const char *s, uint32_t *ret_u) { + return safe_atou32_full(s, 0, (unsigned*) ret_u); +} + +static inline int safe_atoi32(const char *s, int32_t *ret_i) { + assert_cc(sizeof(int32_t) == sizeof(int)); + return safe_atoi(s, (int*) ret_i); +} + +int safe_atollu_full(const char *s, unsigned base, unsigned long long *ret_llu); + +static inline int safe_atollu(const char *s, unsigned long long *ret_llu) { + return safe_atollu_full(s, 0, ret_llu); +} + +static inline int safe_atou64(const char *s, uint64_t *ret_u) { + assert_cc(sizeof(uint64_t) == sizeof(unsigned long long)); + return safe_atollu(s, (unsigned long long*) ret_u); +} + +static inline int safe_atoi64(const char *s, int64_t *ret_i) { + assert_cc(sizeof(int64_t) == sizeof(long long int)); + return safe_atolli(s, (long long int*) ret_i); +} + +static inline int safe_atoux64(const char *s, uint64_t *ret) { + assert_cc(sizeof(int64_t) == sizeof(unsigned long long)); + return safe_atollu_full(s, 16, (unsigned long long*) ret); +} + +#if LONG_MAX == INT_MAX +static inline int safe_atolu_full(const char *s, unsigned base, unsigned long *ret_u) { + assert_cc(sizeof(unsigned long) == sizeof(unsigned)); + return safe_atou_full(s, base, (unsigned*) ret_u); +} +static inline int safe_atoli(const char *s, long int *ret_u) { + assert_cc(sizeof(long int) == sizeof(int)); + return safe_atoi(s, (int*) ret_u); +} +#else +static inline int safe_atolu_full(const char *s, unsigned base, unsigned long *ret_u) { + assert_cc(sizeof(unsigned long) == sizeof(unsigned long long)); + return safe_atollu_full(s, base, (unsigned long long*) ret_u); +} +static inline int safe_atoli(const char *s, long int *ret_u) { + assert_cc(sizeof(long int) == sizeof(long long int)); + return safe_atolli(s, (long long int*) ret_u); +} +#endif + +static inline int safe_atolu(const char *s, unsigned long *ret_u) { + return safe_atolu_full(s, 0, ret_u); +} + +#if SIZE_MAX == UINT_MAX +static inline int safe_atozu(const char *s, size_t *ret_u) { + assert_cc(sizeof(size_t) == sizeof(unsigned)); + return safe_atou(s, (unsigned *) ret_u); +} +#else +static inline int safe_atozu(const char *s, size_t *ret_u) { + assert_cc(sizeof(size_t) == sizeof(unsigned long)); + return safe_atolu(s, ret_u); +} +#endif + +int safe_atod(const char *s, double *ret_d); + +int parse_fractional_part_u(const char **s, size_t digits, unsigned *res); + +int parse_nice(const char *p, int *ret); + +int parse_ip_port(const char *s, uint16_t *ret); +int parse_ip_port_range(const char *s, uint16_t *low, uint16_t *high); + +int parse_ip_prefix_length(const char *s, int *ret); + +int parse_oom_score_adjust(const char *s, int *ret); + +/* Implement floating point using fixed integers, to improve performance when + * calculating load averages. These macros can be used to extract the integer + * and decimal parts of a value. */ +#define LOADAVG_PRECISION_BITS 11 +#define LOADAVG_FIXED_POINT_1_0 (1 << LOADAVG_PRECISION_BITS) +#define LOADAVG_INT_SIDE(x) ((x) >> LOADAVG_PRECISION_BITS) +#define LOADAVG_DECIMAL_SIDE(x) LOADAVG_INT_SIDE(((x) & (LOADAVG_FIXED_POINT_1_0 - 1)) * 100) + +/* Given a Linux load average (e.g. decimal number 34.89 where 34 is passed as i and 89 is passed as f), convert it + * to a loadavg_t. */ +int store_loadavg_fixed_point(unsigned long i, unsigned long f, loadavg_t *ret); +int parse_loadavg_fixed_point(const char *s, loadavg_t *ret); |