/* spl_dumptree.c 可配置的树形打印模块（只用基本 ASCII）*/

#include "spl_dumptree.h"
#include <stdarg.h>

const spl_dumptree_style_t spl_dumptree_ascii_style = {
    "| ",
    "|-",
    "`-",
    "  ",
};

void spl_dumptree_print(const spl_dumptree_style_t *st, const char *prefix, int is_last,
                        const char *fmt, ...) {
    va_list ap;
    printf("%s%s ", prefix, is_last ? st->last_branch : st->branch);
    va_start(ap, fmt);
    vprintf(fmt, ap);
    va_end(ap);
    printf("\n");
}

void spl_dumptree_child_prefix(const spl_dumptree_style_t *st, const char *prefix, int is_last,
                               char *out, size_t cap) {
    snprintf(out, cap, "%s%s", prefix, is_last ? st->space : st->vertical);
}