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	util.h - ledit - Text editor (WIP)
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	util.h (1605B)
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	1 #ifndef _UTIL_H_
	2 #define _UTIL_H_
	3
	4 /*
	5 * Return the position of the next start of a utf8 character.
	6 * If there is none, the position of the terminating NUL is
	7 * returned.
	8 */
	9 char next_utf8(char str);
	10
	11 /*
	12 * Same as above, but also works with non-nul-terminated strings.
	13 * Instead of a pointer, the index of the next utf8 char is
	14 * returned.
	15 */
	16 size_t next_utf8_len(char *str, size_t len);
	17
	18 /*
	19 * Add size_t values and abort if overflow would occur.
	20 * FIXME: Maybe someone with actual experience could tell me
	21 * if this overflow checking actually works.
	22 */
	23 size_t add_sz(size_t a, size_t b);
	24 size_t add_sz3(size_t a, size_t b, size_t c);
	25
	26 void swap_sz(size_t a, size_t b);
	27 void sort_range(size_t l1, size_t b1, size_t l2, size_t b2);
	28
	29 /*
	30 * Compare the nul-terminated string 'terminated' with the char
	31 * array 'array' with length 'len'.
	32 * Returns non-zero if they are equal, 0 otherwise.
	33 */
	34 /* Note: this doesn't work if array contains '\0'. */
	35 int str_array_equal(const char terminated, const char array, size_t le…
	36
	37 #define LEDIT_MIN(x, y) ((x) < (y) ? (x) : (y))
	38 #define LEDIT_MAX(x, y) ((x) > (y) ? (x) : (y))
	39
	40 /* Apparently, ISO C99 requires at least one argument for
	41 variadic macros, so there are two versions of the macro here. */
	42 #ifdef LEDIT_DEBUG
	43 #define ledit_debug(fmt) do {fprintf(stderr, "%s:%d: " fmt, __FI…
	44 #define ledit_debug_fmt(fmt, ...) do {fprintf(stderr, "%s:%d: " …
	45 #else
	46 #define ledit_debug(fmt) do {} while (0)
	47 #define ledit_debug_fmt(fmt, ...) do {} while (0)
	48 #endif
	49
	50 #endif