method

syswrite

v1_8_7_72 - Show latest stable - 0 notes - Class: StringIO

syswrite(p1) public

Appends the given string to the underlying buffer string of strio. The stream must be opened for writing. If the argument is not a string, it will be converted to a string using to_s. Returns the number of bytes written. See IO#write.

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/*
 * call-seq:
 *   strio.write(string)    -> integer
 *   strio.syswrite(string) -> integer
 *
 * Appends the given string to the underlying buffer string of *strio*.
 * The stream must be opened for writing.  If the argument is not a
 * string, it will be converted to a string using <code>to_s</code>.
 * Returns the number of bytes written.  See IO#write.
 */
static VALUE
strio_write(self, str)
    VALUE self, str;
{
    struct StringIO *ptr = writable(StringIO(self));
    long len, olen;

    if (TYPE(str) != T_STRING)
        str = rb_obj_as_string(str);
    len = RSTRING(str)->len;
    if (!len) return INT2FIX(0);
    check_modifiable(ptr);
    olen = RSTRING(ptr->string)->len;
    if (ptr->flags & FMODE_APPEND) {
        ptr->pos = olen;
    }
    if (ptr->pos == olen) {
        rb_str_cat(ptr->string, RSTRING(str)->ptr, len);
    }
    else {
        strio_extend(ptr, ptr->pos, len);
        rb_str_update(ptr->string, ptr->pos, len, str);
    }
    OBJ_INFECT(ptr->string, self);
    ptr->pos += len;
    return LONG2NUM(len);
}

syswrite

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