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#ifndef CCMMC_HEADER_COMMON_H
#define CCMMC_HEADER_COMMON_H
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// The name of this program, which can be used in error messages
#define prog_name ccmmc_main_name
extern const char *ccmmc_main_name;
// Calculate the length of an array
#define SIZEOF_ARRAY(x) (sizeof(x)/sizeof(x[0]))
// Make sure that we have a POSIX-compatible strerror_r function
#ifndef HAVE_STRERROR_R
# error "strerror_r() is not available"
#endif
#ifndef HAVE_DECL_STRERROR_R
# error "strerror_r() is not declared"
#endif
#ifdef STRERROR_R_CHAR_P
# ifdef _GNU_SOURCE
# error "_GNU_SOURCE must not be defined"
# else
# error "This program doesn't work with GNU-specific strerror_r()"
# endif
#endif
// Make multi-thread error reporting easier
#define ERR_LEN 1024
#define ERR_DECL char err[ERR_LEN]
#define ERR_MSG get_err_msg(errno, err, ERR_LEN)
static char *get_err_msg(int num, char *buf, size_t len) {
int errno_save = errno;
if (strerror_r (num, buf, len) != 0)
snprintf (buf, len, "Unknown error %d", num);
errno = errno_save;
return buf;
}
#define ERR_FATAL_CHECK(result, function) \
if (result == NULL) { \
ERR_DECL; \
fprintf(stderr, "%s: " #function ": %s\n", prog_name, ERR_MSG); \
exit(1); \
}
#endif
// vim: set sw=4 ts=4 sts=4 et:
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