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  * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
   6  *
   7  */
   8 #pragma once
   9
  10 #include "queue.h"
  11
  12 /* Get the maximum/minimum of x and y */
  13 #undef MAX
  14 #define MAX(x, y) ((x) > (y) ? (x) : (y))
  15 #undef MIN
  16 #define MIN(x, y) ((x) < (y) ? (x) : (y))
  17
  18 #define STARTS_WITH(string, len, needle) ((len >= strlen(needle)) && strncasecmp(string, needle, strlen(needle)) == 0)
  19
  20 /* Securely free p */
  21 #define FREE(p)          \
  22     do {                 \
  23         if (p != NULL) { \
  24             free(p);     \
  25             p = NULL;    \
  26         }                \
  27     } while (0)
  28
  29 /* Securely fee single-linked list */
  30 #define FREE_SLIST(l, type)              \
  31     do {                                 \
  32         type *walk = SLIST_FIRST(l);     \
  33         while (!SLIST_EMPTY(l)) {        \
  34             SLIST_REMOVE_HEAD(l, slist); \
  35             FREE(walk);                  \
  36             walk = SLIST_FIRST(l);       \
  37         }                                \
  38     } while (0)
  39
  40 /* Securely fee tail-queues */
  41 #define FREE_TAILQ(l, type)                         \
  42     do {                                            \
  43         type *walk = TAILQ_FIRST(l);                \
  44         while (!TAILQ_EMPTY(l)) {                   \
  45             TAILQ_REMOVE(l, TAILQ_FIRST(l), tailq); \
  46             FREE(walk);                             \
  47             walk = TAILQ_FIRST(l);                  \
  48         }                                           \
  49     } while (0)
  50
  51 #if defined(DLOG)
  52 #undef DLOG
  53 #endif
  54 /* Use cool logging macros */
  55 #define DLOG(fmt, ...)                                                 \
  56     do {                                                               \
  57         if (config.verbose) {                                          \
  58             printf("[%s:%d] " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
  59         }                                                              \
  60     } while (0)
  61
  62 /* We will include libi3.h which define its own version of ELOG.
  63  * We want *our* version, so we undef the libi3 one. */
  64 #if defined(ELOG)
  65 #undef ELOG
  66 #endif
  67 #define ELOG(fmt, ...)                                                             \
  68     do {                                                                           \
  69         fprintf(stderr, "[%s:%d] ERROR: " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
  70     } while (0)