/* Tries to add more characters from the fp file, but not exceed length of the
* line buffer (the len parameter) and maximum number of printable character
* positions (the max parameter). Returns new length of the line buffer. */
static size_t
add_to_line(FILE *fp, size_t max, char line[], size_t len)
{
size_t n_len = get_normal_utf8_string_length(line) - esc_str_overhead(line);
size_t curr_len = strlen(line);
while(n_len < max && line[curr_len - 1] != '\n' && !feof(fp))
{
if(get_line(fp, line + curr_len, len - curr_len) == NULL)
{
break;
}
n_len = get_normal_utf8_string_length(line) - esc_str_overhead(line);
curr_len = strlen(line);
}
return curr_len;
}
/* Returns number of character positions allocated by the string on the
* screen. On issues will try to do the best, to make visible at least
* something. */
static size_t
get_width_on_screen(const char str[])
{
size_t length = (size_t)-1;
wchar_t *const wide = to_wide(str);
if(wide != NULL)
{
length = wcswidth(wide, (size_t)-1);
free(wide);
}
if(length == (size_t)-1)
{
length = get_normal_utf8_string_length(str);
}
return length;
}
