mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-23 00:00:01 +01:00
Steffen Vogel
6a069c1a4f
git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@228 8ec27952-4edc-4aab-86aa-e87bb2611832
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/** Various helper functions.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014, Institute for Automation of Complex Power Systems, EONERC
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* @file
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*/
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#ifndef _UTILS_H_
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#define _UTILS_H_
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#include <stdlib.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <string.h>
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#include <sched.h>
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#ifdef __GNUC__
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#define EXPECT(x, v) __builtin_expect(x, v)
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#else
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#define EXPECT(x, v) (x)
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#endif
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/* Some color escape codes for pretty log messages */
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#define RED(str) "\x1B[31m" str "\x1B[0m" /**< Print str in red */
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#define GRN(str) "\x1B[32m" str "\x1B[0m" /**< Print str in green */
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#define YEL(str) "\x1B[33m" str "\x1B[0m" /**< Print str in yellow */
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#define BLU(str) "\x1B[34m" str "\x1B[0m" /**< Print str in blue */
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#define MAG(str) "\x1B[35m" str "\x1B[0m" /**< Print str in magenta */
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#define CYN(str) "\x1B[36m" str "\x1B[0m" /**< Print str in cyan */
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#define WHT(str) "\x1B[37m" str "\x1B[0m" /**< Print str in white */
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#define BLD(str) "\x1B[1m" str "\x1B[0m" /**< Print str in bold */
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/** The log level which is passed as first argument to print() */
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enum log_level { DEBUG, INFO, WARN, ERROR };
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/* Forward declarations */
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struct settings;
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struct sockaddr_in;
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struct sockaddr;
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extern int debug;
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/** Logs variadic messages to stdout.
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*
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* @param lvl The log level
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* @param fmt The format string (printf alike)
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*/
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void print(enum log_level lvl, const char *fmt, ...);
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/** Resolve host/service name by local databases and/or nameservers.
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*
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* @param addr A string containing the hostname/ip and port seperated by a colon
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* @param sa A pointer to the resolved address
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* @param flags Flags for gai
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int resolve_addr(const char *addr, struct sockaddr_in *sa, int flags);
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/** Convert integer to cpu_set_t.
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*
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* @param set A cpu bitmask
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* @return The opaque cpu_set_t datatype
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*/
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cpu_set_t to_cpu_set(int set);
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/** Get delta between two timespec structs */
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double timespec_delta(struct timespec *start, struct timespec *end);
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/** Get period as timespec from rate */
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struct timespec timespec_rate(double rate);
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/** Print ASCII style plot of histogram */
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void hist_plot(unsigned *hist, int length);
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/** Dump histogram data in Matlab format */
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void hist_dump(unsigned *hist, int length);
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/** Append an element to a single linked list */
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#define list_add(list, elm) do { \
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elm->next = list; \
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list = elm; \
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} while (0)
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/** Check assertion and exit if failed. */
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#define assert(exp) do { \
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if (EXPECT(!exp, 0)) { \
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print(ERROR, "Assertion failed: '%s' in %s, %s:%d", \
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#exp, __FUNCTION__, __BASE_FILE__, __LINE__); \
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exit(EXIT_FAILURE); \
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} } while (0)
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/** Printf alike debug message with level. */
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#define debug(lvl, msg, ...) do { \
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if (lvl <= debug) \
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print(DEBUG, msg, ##__VA_ARGS__); \
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} while (0)
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/** Printf alike info message. */
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#define info(msg, ...) do { \
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print(INFO, msg, ##__VA_ARGS__); \
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} while (0)
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/** Printf alike warning message. */
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#define warn(msg, ...) do { \
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print(WARN, msg, ##__VA_ARGS__); \
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} while (0)
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/** Print error and exit. */
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#define error(msg, ...) do { \
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print(ERROR, msg, ##__VA_ARGS__); \
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exit(EXIT_FAILURE); \
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} while (0)
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/** Print error and strerror(errno). */
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#define perror(msg, ...) do { \
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print(ERROR, msg ": %s", ##__VA_ARGS__, \
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strerror(errno)); \
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exit(EXIT_FAILURE); \
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} while (0)
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/** Print configuration error and exit. */
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#define cerror(c, msg, ...) do { \
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print(ERROR, msg " in %s:%u", ##__VA_ARGS__, \
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config_setting_source_file(c), \
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config_setting_source_line(c)); \
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exit(EXIT_FAILURE); \
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} while (0)
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#endif /* _UTILS_H_ */
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