From d68d0f39ab7675745e7d177f6774736f7ec58783 Mon Sep 17 00:00:00 2001 From: Louis Burda Date: Wed, 1 Dec 2021 00:31:01 +0100 Subject: Replace readline with own implementation for integration --- util.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 util.c (limited to 'util.c') diff --git a/util.c b/util.c new file mode 100644 index 0000000..b9f37de --- /dev/null +++ b/util.c @@ -0,0 +1,43 @@ +#define _XOPEN_SOURCE 600 + +#include "util.h" + +#include +#include +#include +#include + +int +strnwidth(const char *s, int n) +{ + mbstate_t shift_state; + wchar_t wc; + size_t wc_len; + size_t width = 0; + + memset(&shift_state, '\0', sizeof shift_state); + + for (size_t i = 0; i < n; i += wc_len) { + wc_len = mbrtowc(&wc, s + i, MB_CUR_MAX, &shift_state); + if (!wc_len) { + break; + } else if (wc_len >= (size_t)-2) { + width += MIN(n - 1, strlen(s + i)); + break; + } else { + width += iswcntrl(wc) ? 2 : MAX(0, wcwidth(wc)); + } + } + +done: + return width; +} + +void +assert(int cond, const char *file, int line, const char *condstr) +{ + if (cond) return; + + fprintf(stderr, "Assertion failed %s:%i (%s)", file, line, condstr); + exit(1); +} -- cgit v1.2.3-71-gd317