git.sur5r.net Git - i3/i3/blob - i3bar/include/util.h

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
   6  *
   7  */
   8 #pragma once
   9
  10 #include <config.h>
  11
  12 #include "queue.h"
  13
  14 /* Get the maximum/minimum of x and y */
  15 #undef MAX
  16 #define MAX(x, y) ((x) > (y) ? (x) : (y))
  17 #undef MIN
  18 #define MIN(x, y) ((x) < (y) ? (x) : (y))
  19
  20 #define STARTS_WITH(string, len, needle) (((len) >= strlen((needle))) && strncasecmp((string), (needle), strlen((needle))) == 0)
  21
  22 /* Securely free p */
  23 #define FREE(p)          \
  24     do {                 \
  25         if (p != NULL) { \
  26             free(p);     \
  27             p = NULL;    \
  28         }                \
  29     } while (0)
  30
  31 /* Securely free single-linked list */
  32 #define FREE_SLIST(l, type)              \
  33     do {                                 \
  34         type *walk = SLIST_FIRST(l);     \
  35         while (!SLIST_EMPTY(l)) {        \
  36             SLIST_REMOVE_HEAD(l, slist); \
  37             FREE(walk);                  \
  38             walk = SLIST_FIRST(l);       \
  39         }                                \
  40     } while (0)
  41
  42 /* Securely free tail queue */
  43 #define FREE_TAILQ(l, type)                         \
  44     do {                                            \
  45         type *walk = TAILQ_FIRST(l);                \
  46         while (!TAILQ_EMPTY(l)) {                   \
  47             TAILQ_REMOVE(l, TAILQ_FIRST(l), tailq); \
  48             FREE(walk);                             \
  49             walk = TAILQ_FIRST(l);                  \
  50         }                                           \
  51     } while (0)
  52
  53 #if defined(DLOG)
  54 #undef DLOG
  55 #endif
  56 /* Use cool logging macros */
  57 #define DLOG(fmt, ...)                                                 \
  58     do {                                                               \
  59         if (config.verbose) {                                          \
  60             printf("[%s:%d] " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
  61         }                                                              \
  62     } while (0)
  63
  64 /* We will include libi3.h which define its own version of ELOG.
  65  * We want *our* version, so we undef the libi3 one. */
  66 #if defined(ELOG)
  67 #undef ELOG
  68 #endif
  69 #define ELOG(fmt, ...)                                                             \
  70     do {                                                                           \
  71         fprintf(stderr, "[%s:%d] ERROR: " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
  72     } while (0)