53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
//
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// utils.h - Some utility and printing functions.
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//
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#pragma once
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#include <err.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifndef auto
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#define auto __auto_type
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#endif
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#define S1(x) #x
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#define S2(x) S1(x)
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#define require(e, msg) ({\
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__typeof__(e) __expr = e; \
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if (_Generic(__expr, int: (ssize_t)__expr < 0, ssize_t: (ssize_t)__expr < 0, default: !__expr)) errx(1, __FILE__":"S2(__LINE__)": " msg); \
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__expr; \
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})
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#define When(x, _tag) ((x)->type == _tag ? &(x)->__tagged._tag : (errx(1, __FILE__ ":%d This was supposed to be a " # _tag "\n", __LINE__), &(x)->__tagged._tag))
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#ifndef public
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#define public __attribute__ ((visibility ("default")))
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#endif
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#define new(t) require(calloc(1, sizeof(t)), "`new(" #t ")` allocation failure")
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#define checked_strdup(s) require(strdup(s), "`checked_strdup(" #s ")` allocation failure")
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#define grow(arr,n) require(realloc(arr,sizeof(arr[0])*(n)), "`grow(" #arr ", " #n ")` allocation failure")
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#define streq(a, b) (strcmp(a, b) == 0)
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__attribute__((nonnull(1)))
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char unescapechar(const char *escaped, const char **after, const char *end);
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__attribute__((pure, nonnull))
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const char *after_name(const char *str, const char *end);
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__attribute__((pure, nonnull, returns_nonnull))
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const char *after_spaces(const char *str, bool skip_nl, const char *end);
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__attribute__((nonnull))
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bool matchchar(const char **str, char c, bool skip_nl, const char *end);
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__attribute__((nonnull))
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bool matchstr(const char **str, const char *target, bool skip_nl, const char *end);
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__attribute__((nonnull))
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void delete(void *p);
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// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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