scrypt-1.2.1/libcperciva/util/warnp.h

   1 #ifndef _WARNP_H_
   2 #define _WARNP_H_
   3
   4 #include <errno.h>
   5 #include <stddef.h>
   6
   7 /* Avoid namespace collisions with BSD <err.h>. */
   8 #define warn libcperciva_warn
   9 #define warnx libcperciva_warnx
  10
  11 /**
  12  * warnp_setprogname(progname):
  13  * Set the program name to be used by warn() and warnx() to ${progname}.
  14  */
  15 void warnp_setprogname(const char *);
  16 #define WARNP_INIT      do {            \
  17         if (argv[0] != NULL)            \
  18                 warnp_setprogname(argv[0]);     \
  19 } while (0)
  20
  21 /* As in BSD <err.h>. */
  22 void warn(const char *, ...);
  23 void warnx(const char *, ...);
  24
  25 /*
  26  * If compiled with DEBUG defined, print __FILE__ and __LINE__.
  27  */
  28 #ifdef DEBUG
  29 #define warnline        do {                            \
  30         warnx("%s, %d", __FILE__, __LINE__);    \
  31 } while (0)
  32 #else
  33 #define warnline
  34 #endif
  35
  36 /*
  37  * Call warn(3) or warnx(3) depending upon whether errno == 0; and clear
  38  * errno (so that the standard error message isn't repeated later).
  39  */
  40 #define warnp(...) do {                                 \
  41         warnline;                                       \
  42         if (errno != 0) {                               \
  43                 warn(__VA_ARGS__);              \
  44                 errno = 0;                              \
  45         } else                                          \
  46                 warnx(__VA_ARGS__);             \
  47 } while (0)
  48
  49 /*
  50  * Call warnx(3) and set errno == 0.  Unlike warnp, this should be used
  51  * in cases where we're reporting a problem which we discover ourselves
  52  * rather than one which is reported to us from a library or the kernel.
  53  */
  54 #define warn0(...) do {                                 \
  55         warnline;                                       \
  56         warnx(__VA_ARGS__);                     \
  57         errno = 0;                                      \
  58 } while (0)
  59
  60 #endif /* !_WARNP_H_ */