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Line 37... Line 37...
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/** Standard input character device. */
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/** Standard input character device. */
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chardev_t *stdin = NULL;
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chardev_t *stdin = NULL;
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chardev_t *stdout = NULL;
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chardev_t *stdout = NULL;
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/** Get character from character device.
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 *
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 * @param chardev Character device.
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 *
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 * @return Character read.
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 */
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static __u8 _getc(chardev_t *chardev)
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{
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    __u8 ch;
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    ipl_t ipl;
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    waitq_sleep(&chardev->wq);
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    ipl = interrupts_disable();
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    spinlock_lock(&chardev->lock);
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    ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
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    chardev->counter--;
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    spinlock_unlock(&chardev->lock);
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    interrupts_restore(ipl);
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    chardev->op->resume(chardev);
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    return ch;
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}
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/** Get string from character device.
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/** Get string from character device.
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 *
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 *
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 * Read characters from character device until first occurrence
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 * Read characters from character device until first occurrence
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 * of newline character.
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 * of newline character.
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 *
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 *
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{
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{
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    index_t index = 0;
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    index_t index = 0;
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    char ch;
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    char ch;
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    while (index < buflen) {
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    while (index < buflen) {
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        ch = getc(chardev);
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        ch = _getc(chardev);
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        if (ch == '\b') {
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            if (index > 0) {
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                index--;
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                /* Space backspace, space */
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                putchar('\b');
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                putchar(' ');
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                putchar('\b');
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            }
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            continue;
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        }
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        putchar(ch);
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        if (ch == '\n') { /* end of string => write 0, return */
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        if (ch == '\n') { /* end of string => write 0, return */
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            buf[index] = '\0';
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            buf[index] = '\0';
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            return (count_t) index;
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            return (count_t) index;
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        }
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        }
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        buf[index++] = ch;
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        buf[index++] = ch;
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    }
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    }
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    return (count_t) index;
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    return (count_t) index;
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}
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}
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/** Get character from character device.
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/** Get character from device & echo it to screen */
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 *
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 * @param chardev Character device.
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 *
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 * @return Character read.
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 */
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__u8 getc(chardev_t *chardev)
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__u8 getc(chardev_t *chardev)
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{
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{
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    __u8 ch;
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    __u8 ch;
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    ipl_t ipl;
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    waitq_sleep(&chardev->wq);
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    ipl = interrupts_disable();
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    spinlock_lock(&chardev->lock);
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    ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
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    chardev->counter--;
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    spinlock_unlock(&chardev->lock);
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    interrupts_restore(ipl);
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    chardev->op->resume(chardev);
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    ch = _getc(chardev);
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    putchar(ch);
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    return ch;
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    return ch;
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}
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}
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void putchar(char c)
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void putchar(char c)
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{
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{