80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
//
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// utils.h
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// Copyright 2021 Bruce Hill
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// Released under the MIT license with the Commons Clause
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//
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// This file contains some definitions of some utility macros and functions.
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//
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#ifndef FILE_UTILS__H
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#define FILE_UTILS__H
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#include <string.h>
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#ifndef streq
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#define streq(a,b) (strcmp(a,b)==0)
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#endif
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#define MAX(a,b) ((a) < (b) ? (b) : (a))
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#define MIN(a,b) ((a) > (b) ? (b) : (a))
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// Platform-dependent time strucutre accessors:
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#ifdef __APPLE__
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#define mtime(s) (s).st_mtimespec
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#define atime(s) (s).st_atimespec
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#define ctime(s) (s).st_ctimespec
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#else
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#define mtime(s) (s).st_mtim
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#define atime(s) (s).st_atim
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#define ctime(s) (s).st_ctim
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#endif
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// Entry macros
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#define IS_SELECTED(e) (((e)->selected.atme) != NULL)
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#define IS_VIEWED(e) ((e)->index >= 0)
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#define IS_LOADED(e) ((e)->hash.atme != NULL)
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#define E_ISDIR(e) (S_ISDIR(S_ISLNK((e)->info.st_mode) ? (e)->linkedmode : (e)->info.st_mode))
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// Linked list macros
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#define LL_PREPEND(head, node, name) do { \
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((node)->name).atme = &(head); \
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((node)->name).next = head; \
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if (head) ((head)->name).atme = &(((node)->name).next); \
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head = node; \
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} while (0)
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#define LL_REMOVE(node, name) do { \
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if (((node)->name).next) \
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((__typeof__(node))(node)->name.next)->name.atme = ((node)->name).atme; \
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if (((node)->name).atme) \
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*(((node)->name).atme) = ((node)->name).next; \
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((node)->name).atme = NULL; \
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((node)->name).next = NULL; \
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} while (0)
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#define LEN(a) (sizeof(a)/sizeof(a[0]))
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#define FOREACH(type, var, array) for (type var = array; (var) < &(array)[LEN(array)]; var++)
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#define S1(x) #x
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#define S2(x) S1(x)
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#define __LOCATION__ __FILE__ ":" S2(__LINE__)
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// Error checking helper macros:
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#define nonnegative(exp, ...) check_nonnegative(exp, __LOCATION__ ": `" #exp "` " __VA_ARGS__)
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#define nonnull(exp, ...) check_nonnull(exp, __LOCATION__ ": `" #exp "` " __VA_ARGS__)
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// Error-checking memory allocation helper macros:
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#define new(t) check_nonnull(calloc(1, sizeof(t)), __LOCATION__ ": new(" #t ") failed")
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#define new_bytes(n) check_nonnull(calloc(1, n), __LOCATION__ ": new_bytes(" #n ") failed")
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#define grow(obj, new_count) check_nonnull(reallocarray(obj, (new_count), sizeof(obj[0])), __LOCATION__ ": grow(" #obj ", " #new_count ") failed")
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#define check_strdup(s) check_nonnull(strdup(s), __LOCATION__ ": check_strdup(" #s ") failed")
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int check_nonnegative(int negative_err, const char *err_msg, ...);
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__attribute__((returns_nonnull))
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void *check_nonnull(void *p, const char *err_msg, ...);
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__attribute__((nonnull))
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void delete(void *p);
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#endif
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// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
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