static va_dcl int int_vasprintf ( char **  result, const char *  format, va_list *  args  )

static

Definition at line 58 of file vsprintf.c.

Referenced by lw_vasprintf().

{
        const char *p = format;
        /* Add one to make sure that it is never zero, which might cause malloc
           to return NULL.  */
        int total_width = strlen (format) + 1;
        va_list ap;

        memcpy (&ap, args, sizeof (va_list));

        while (*p != '\0')
        {
                if (*p++ == '%')
                {
                        while (strchr ("-+ #0", *p))
                                ++p;
                        if (*p == '*')
                        {
                                ++p;
                                total_width += abs (va_arg (ap, int));
                        }
                        else
                                total_width += strtoul (p, (char **) &p, 10);
                        if (*p == '.')
                        {
                                ++p;
                                if (*p == '*')
                                {
                                        ++p;
                                        total_width += abs (va_arg (ap, int));
                                }
                                else
                                        total_width += strtoul (p, (char **) &p, 10);
                        }
                        while (strchr ("hlLjtz", *p))
                                ++p;
                        /* Should be big enough for any format specifier except %s
                           and floats.  */
                        total_width += 30;
                        switch (*p)
                        {
                        case 'd':
                        case 'i':
                        case 'o':
                        case 'u':
                        case 'x':
                        case 'X':
                        case 'c':
                                (void) va_arg (ap, int);
                                break;
                        case 'f':
                        {
                                double arg = va_arg (ap, double);
                                if (arg >= 1.0 || arg <= -1.0)
                                        /* Since an ieee double can have an exponent of 307, we'll
                                           make the buffer wide enough to cover the gross case. */
                                        total_width += 307;
                        }
                        break;
                        case 'e':
                        case 'E':
                        case 'g':
                        case 'G':
                                (void) va_arg (ap, double);
                                break;
                        case 's':
                                total_width += strlen (va_arg (ap, char *));
                                break;
                        case 'p':
                        case 'n':
                                (void) va_arg (ap, char *);
                                break;
                        }
                        p++;
                }
        }
#ifdef TEST
        global_total_width = total_width;
#endif
        *result = malloc (total_width);
        if (*result != NULL)
                return vsprintf (*result, format, *args);
        else
                return 0;
}

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