#include "config_error.h"
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>

static __thread char config_errors[4096];

void config_error_clear(void) { config_errors[0] = '\0'; }
const char *config_error_text(void) { return config_errors; }

void config_error_append(const char *format, ...) {
    const int saved_errno = errno;
    size_t used = strlen(config_errors);
    if (used < sizeof(config_errors) - 2) {
        if (used) config_errors[used++] = '\n';
        va_list args;
        va_start(args, format);
        vsnprintf(config_errors + used, sizeof(config_errors) - used, format, args);
        va_end(args);
    }
    errno = saved_errno;
}