Split out simple parser and readline into separate files

It doesn't make sense to have the simple parser and the readline code
all in main. Split them out into separate files.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 670 insertions, 0 deletions

diff --git a/common/cli_readline.c b/common/cli_readline.c
new file mode 100644
index 00000000000..cea0b7c81b8
--- /dev/null
+++ b/common/cli_readline.c
@@ -0,0 +1,670 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Add to readline cmdline-editing by
+ * (C) Copyright 2005
+ * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <cli.h>
+#include <watchdog.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const char erase_seq[] = "\b \b";	/* erase sequence */
+static const char   tab_seq[] = "        ";	/* used to expand TABs */
+
+#ifdef CONFIG_BOOT_RETRY_TIME
+static uint64_t endtime;      /* must be set, default is instant timeout */
+static int      retry_time = -1; /* -1 so can call readline before main_loop */
+#endif
+
+char console_buffer[CONFIG_SYS_CBSIZE + 1];	/* console I/O buffer	*/
+
+#ifndef CONFIG_BOOT_RETRY_MIN
+#define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
+#endif
+
+static char *delete_char (char *buffer, char *p, int *colp, int *np, int plen)
+{
+	char *s;
+
+	if (*np == 0)
+		return p;
+
+	if (*(--p) == '\t') {		/* will retype the whole line */
+		while (*colp > plen) {
+			puts(erase_seq);
+			(*colp)--;
+		}
+		for (s = buffer; s < p; ++s) {
+			if (*s == '\t') {
+				puts(tab_seq + ((*colp) & 07));
+				*colp += 8 - ((*colp) & 07);
+			} else {
+				++(*colp);
+				putc(*s);
+			}
+		}
+	} else {
+		puts(erase_seq);
+		(*colp)--;
+	}
+	(*np)--;
+
+	return p;
+}
+
+#ifdef CONFIG_CMDLINE_EDITING
+
+/*
+ * cmdline-editing related codes from vivi.
+ * Author: Janghoon Lyu <nandy@mizi.com>
+ */
+
+#define putnstr(str, n)	printf("%.*s", (int)n, str)
+
+#define CTL_CH(c)		((c) - 'a' + 1)
+#define CTL_BACKSPACE		('\b')
+#define DEL			((char)255)
+#define DEL7			((char)127)
+#define CREAD_HIST_CHAR		('!')
+
+#define getcmd_putch(ch)	putc(ch)
+#define getcmd_getch()		getc()
+#define getcmd_cbeep()		getcmd_putch('\a')
+
+#define HIST_MAX		20
+#define HIST_SIZE		CONFIG_SYS_CBSIZE
+
+static int hist_max;
+static int hist_add_idx;
+static int hist_cur = -1;
+static unsigned hist_num;
+
+static char *hist_list[HIST_MAX];
+static char hist_lines[HIST_MAX][HIST_SIZE + 1];	/* Save room for NULL */
+
+#define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
+
+static void hist_init(void)
+{
+	int i;
+
+	hist_max = 0;
+	hist_add_idx = 0;
+	hist_cur = -1;
+	hist_num = 0;
+
+	for (i = 0; i < HIST_MAX; i++) {
+		hist_list[i] = hist_lines[i];
+		hist_list[i][0] = '\0';
+	}
+}
+
+static void cread_add_to_hist(char *line)
+{
+	strcpy(hist_list[hist_add_idx], line);
+
+	if (++hist_add_idx >= HIST_MAX)
+		hist_add_idx = 0;
+
+	if (hist_add_idx > hist_max)
+		hist_max = hist_add_idx;
+
+	hist_num++;
+}
+
+static char *hist_prev(void)
+{
+	char *ret;
+	int old_cur;
+
+	if (hist_cur < 0)
+		return NULL;
+
+	old_cur = hist_cur;
+	if (--hist_cur < 0)
+		hist_cur = hist_max;
+
+	if (hist_cur == hist_add_idx) {
+		hist_cur = old_cur;
+		ret = NULL;
+	} else {
+		ret = hist_list[hist_cur];
+	}
+
+	return ret;
+}
+
+static char *hist_next(void)
+{
+	char *ret;
+
+	if (hist_cur < 0)
+		return NULL;
+
+	if (hist_cur == hist_add_idx)
+		return NULL;
+
+	if (++hist_cur > hist_max)
+		hist_cur = 0;
+
+	if (hist_cur == hist_add_idx)
+		ret = "";
+	else
+		ret = hist_list[hist_cur];
+
+	return ret;
+}
+
+#ifndef CONFIG_CMDLINE_EDITING
+static void cread_print_hist_list(void)
+{
+	int i;
+	unsigned long n;
+
+	n = hist_num - hist_max;
+
+	i = hist_add_idx + 1;
+	while (1) {
+		if (i > hist_max)
+			i = 0;
+		if (i == hist_add_idx)
+			break;
+		printf("%s\n", hist_list[i]);
+		n++;
+		i++;
+	}
+}
+#endif /* CONFIG_CMDLINE_EDITING */
+
+#define BEGINNING_OF_LINE() {			\
+	while (num) {				\
+		getcmd_putch(CTL_BACKSPACE);	\
+		num--;				\
+	}					\
+}
+
+#define ERASE_TO_EOL() {				\
+	if (num < eol_num) {				\
+		printf("%*s", (int)(eol_num - num), ""); \
+		do {					\
+			getcmd_putch(CTL_BACKSPACE);	\
+		} while (--eol_num > num);		\
+	}						\
+}
+
+#define REFRESH_TO_EOL() {			\
+	if (num < eol_num) {			\
+		wlen = eol_num - num;		\
+		putnstr(buf + num, wlen);	\
+		num = eol_num;			\
+	}					\
+}
+
+static void cread_add_char(char ichar, int insert, unsigned long *num,
+	       unsigned long *eol_num, char *buf, unsigned long len)
+{
+	unsigned long wlen;
+
+	/* room ??? */
+	if (insert || *num == *eol_num) {
+		if (*eol_num > len - 1) {
+			getcmd_cbeep();
+			return;
+		}
+		(*eol_num)++;
+	}
+
+	if (insert) {
+		wlen = *eol_num - *num;
+		if (wlen > 1)
+			memmove(&buf[*num+1], &buf[*num], wlen-1);
+
+		buf[*num] = ichar;
+		putnstr(buf + *num, wlen);
+		(*num)++;
+		while (--wlen)
+			getcmd_putch(CTL_BACKSPACE);
+	} else {
+		/* echo the character */
+		wlen = 1;
+		buf[*num] = ichar;
+		putnstr(buf + *num, wlen);
+		(*num)++;
+	}
+}
+
+static void cread_add_str(char *str, int strsize, int insert,
+			  unsigned long *num, unsigned long *eol_num,
+			  char *buf, unsigned long len)
+{
+	while (strsize--) {
+		cread_add_char(*str, insert, num, eol_num, buf, len);
+		str++;
+	}
+}
+
+static int cread_line(const char *const prompt, char *buf, unsigned int *len,
+		int timeout)
+{
+	unsigned long num = 0;
+	unsigned long eol_num = 0;
+	unsigned long wlen;
+	char ichar;
+	int insert = 1;
+	int esc_len = 0;
+	char esc_save[8];
+	int init_len = strlen(buf);
+	int first = 1;
+
+	if (init_len)
+		cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
+
+	while (1) {
+#ifdef CONFIG_BOOT_RETRY_TIME
+		while (!tstc()) {	/* while no incoming data */
+			if (retry_time >= 0 && get_ticks() > endtime)
+				return -2;	/* timed out */
+			WATCHDOG_RESET();
+		}
+#endif
+		if (first && timeout) {
+			uint64_t etime = endtick(timeout);
+
+			while (!tstc()) {	/* while no incoming data */
+				if (get_ticks() >= etime)
+					return -2;	/* timed out */
+				WATCHDOG_RESET();
+			}
+			first = 0;
+		}
+
+		ichar = getcmd_getch();
+
+		if ((ichar == '\n') || (ichar == '\r')) {
+			putc('\n');
+			break;
+		}
+
+		/*
+		 * handle standard linux xterm esc sequences for arrow key, etc.
+		 */
+		if (esc_len != 0) {
+			if (esc_len == 1) {
+				if (ichar == '[') {
+					esc_save[esc_len] = ichar;
+					esc_len = 2;
+				} else {
+					cread_add_str(esc_save, esc_len,
+						      insert, &num, &eol_num,
+						      buf, *len);
+					esc_len = 0;
+				}
+				continue;
+			}
+
+			switch (ichar) {
+			case 'D':	/* <- key */
+				ichar = CTL_CH('b');
+				esc_len = 0;
+				break;
+			case 'C':	/* -> key */
+				ichar = CTL_CH('f');
+				esc_len = 0;
+				break;	/* pass off to ^F handler */
+			case 'H':	/* Home key */
+				ichar = CTL_CH('a');
+				esc_len = 0;
+				break;	/* pass off to ^A handler */
+			case 'A':	/* up arrow */
+				ichar = CTL_CH('p');
+				esc_len = 0;
+				break;	/* pass off to ^P handler */
+			case 'B':	/* down arrow */
+				ichar = CTL_CH('n');
+				esc_len = 0;
+				break;	/* pass off to ^N handler */
+			default:
+				esc_save[esc_len++] = ichar;
+				cread_add_str(esc_save, esc_len, insert,
+					      &num, &eol_num, buf, *len);
+				esc_len = 0;
+				continue;
+			}
+		}
+
+		switch (ichar) {
+		case 0x1b:
+			if (esc_len == 0) {
+				esc_save[esc_len] = ichar;
+				esc_len = 1;
+			} else {
+				puts("impossible condition #876\n");
+				esc_len = 0;
+			}
+			break;
+
+		case CTL_CH('a'):
+			BEGINNING_OF_LINE();
+			break;
+		case CTL_CH('c'):	/* ^C - break */
+			*buf = '\0';	/* discard input */
+			return -1;
+		case CTL_CH('f'):
+			if (num < eol_num) {
+				getcmd_putch(buf[num]);
+				num++;
+			}
+			break;
+		case CTL_CH('b'):
+			if (num) {
+				getcmd_putch(CTL_BACKSPACE);
+				num--;
+			}
+			break;
+		case CTL_CH('d'):
+			if (num < eol_num) {
+				wlen = eol_num - num - 1;
+				if (wlen) {
+					memmove(&buf[num], &buf[num+1], wlen);
+					putnstr(buf + num, wlen);
+				}
+
+				getcmd_putch(' ');
+				do {
+					getcmd_putch(CTL_BACKSPACE);
+				} while (wlen--);
+				eol_num--;
+			}
+			break;
+		case CTL_CH('k'):
+			ERASE_TO_EOL();
+			break;
+		case CTL_CH('e'):
+			REFRESH_TO_EOL();
+			break;
+		case CTL_CH('o'):
+			insert = !insert;
+			break;
+		case CTL_CH('x'):
+		case CTL_CH('u'):
+			BEGINNING_OF_LINE();
+			ERASE_TO_EOL();
+			break;
+		case DEL:
+		case DEL7:
+		case 8:
+			if (num) {
+				wlen = eol_num - num;
+				num--;
+				memmove(&buf[num], &buf[num+1], wlen);
+				getcmd_putch(CTL_BACKSPACE);
+				putnstr(buf + num, wlen);
+				getcmd_putch(' ');
+				do {
+					getcmd_putch(CTL_BACKSPACE);
+				} while (wlen--);
+				eol_num--;
+			}
+			break;
+		case CTL_CH('p'):
+		case CTL_CH('n'):
+		{
+			char *hline;
+
+			esc_len = 0;
+
+			if (ichar == CTL_CH('p'))
+				hline = hist_prev();
+			else
+				hline = hist_next();
+
+			if (!hline) {
+				getcmd_cbeep();
+				continue;
+			}
+
+			/* nuke the current line */
+			/* first, go home */
+			BEGINNING_OF_LINE();
+
+			/* erase to end of line */
+			ERASE_TO_EOL();
+
+			/* copy new line into place and display */
+			strcpy(buf, hline);
+			eol_num = strlen(buf);
+			REFRESH_TO_EOL();
+			continue;
+		}
+#ifdef CONFIG_AUTO_COMPLETE
+		case '\t': {
+			int num2, col;
+
+			/* do not autocomplete when in the middle */
+			if (num < eol_num) {
+				getcmd_cbeep();
+				break;
+			}
+
+			buf[num] = '\0';
+			col = strlen(prompt) + eol_num;
+			num2 = num;
+			if (cmd_auto_complete(prompt, buf, &num2, &col)) {
+				col = num2 - num;
+				num += col;
+				eol_num += col;
+			}
+			break;
+		}
+#endif
+		default:
+			cread_add_char(ichar, insert, &num, &eol_num, buf,
+				       *len);
+			break;
+		}
+	}
+	*len = eol_num;
+	buf[eol_num] = '\0';	/* lose the newline */
+
+	if (buf[0] && buf[0] != CREAD_HIST_CHAR)
+		cread_add_to_hist(buf);
+	hist_cur = hist_add_idx;
+
+	return 0;
+}
+
+#endif /* CONFIG_CMDLINE_EDITING */
+
+/****************************************************************************/
+
+int readline(const char *const prompt)
+{
+	/*
+	 * If console_buffer isn't 0-length the user will be prompted to modify
+	 * it instead of entering it from scratch as desired.
+	 */
+	console_buffer[0] = '\0';
+
+	return readline_into_buffer(prompt, console_buffer, 0);
+}
+
+
+int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
+{
+	char *p = buffer;
+#ifdef CONFIG_CMDLINE_EDITING
+	unsigned int len = CONFIG_SYS_CBSIZE;
+	int rc;
+	static int initted;
+
+	/*
+	 * History uses a global array which is not
+	 * writable until after relocation to RAM.
+	 * Revert to non-history version if still
+	 * running from flash.
+	 */
+	if (gd->flags & GD_FLG_RELOC) {
+		if (!initted) {
+			hist_init();
+			initted = 1;
+		}
+
+		if (prompt)
+			puts(prompt);
+
+		rc = cread_line(prompt, p, &len, timeout);
+		return rc < 0 ? rc : len;
+
+	} else {
+#endif	/* CONFIG_CMDLINE_EDITING */
+	char *p_buf = p;
+	int	n = 0;				/* buffer index		*/
+	int	plen = 0;			/* prompt length	*/
+	int	col;				/* output column cnt	*/
+	char	c;
+
+	/* print prompt */
+	if (prompt) {
+		plen = strlen(prompt);
+		puts(prompt);
+	}
+	col = plen;
+
+	for (;;) {
+#ifdef CONFIG_BOOT_RETRY_TIME
+		while (!tstc()) {	/* while no incoming data */
+			if (retry_time >= 0 && get_ticks() > endtime)
+				return -2;	/* timed out */
+			WATCHDOG_RESET();
+		}
+#endif
+		WATCHDOG_RESET();	/* Trigger watchdog, if needed */
+
+#ifdef CONFIG_SHOW_ACTIVITY
+		while (!tstc()) {
+			show_activity(0);
+			WATCHDOG_RESET();
+		}
+#endif
+		c = getc();
+
+		/*
+		 * Special character handling
+		 */
+		switch (c) {
+		case '\r':			/* Enter		*/
+		case '\n':
+			*p = '\0';
+			puts("\r\n");
+			return p - p_buf;
+
+		case '\0':			/* nul			*/
+			continue;
+
+		case 0x03:			/* ^C - break		*/
+			p_buf[0] = '\0';	/* discard input */
+			return -1;
+
+		case 0x15:			/* ^U - erase line	*/
+			while (col > plen) {
+				puts(erase_seq);
+				--col;
+			}
+			p = p_buf;
+			n = 0;
+			continue;
+
+		case 0x17:			/* ^W - erase word	*/
+			p = delete_char(p_buf, p, &col, &n, plen);
+			while ((n > 0) && (*p != ' '))
+				p = delete_char(p_buf, p, &col, &n, plen);
+			continue;
+
+		case 0x08:			/* ^H  - backspace	*/
+		case 0x7F:			/* DEL - backspace	*/
+			p = delete_char(p_buf, p, &col, &n, plen);
+			continue;
+
+		default:
+			/*
+			 * Must be a normal character then
+			 */
+			if (n < CONFIG_SYS_CBSIZE-2) {
+				if (c == '\t') {	/* expand TABs */
+#ifdef CONFIG_AUTO_COMPLETE
+					/*
+					 * if auto completion triggered just
+					 * continue
+					 */
+					*p = '\0';
+					if (cmd_auto_complete(prompt,
+							      console_buffer,
+							      &n, &col)) {
+						p = p_buf + n;	/* reset */
+						continue;
+					}
+#endif
+					puts(tab_seq + (col & 07));
+					col += 8 - (col & 07);
+				} else {
+					char buf[2];
+
+					/*
+					 * Echo input using puts() to force an
+					 * LCD flush if we are using an LCD
+					 */
+					++col;
+					buf[0] = c;
+					buf[1] = '\0';
+					puts(buf);
+				}
+				*p++ = c;
+				++n;
+			} else {			/* Buffer full */
+				putc('\a');
+			}
+		}
+	}
+#ifdef CONFIG_CMDLINE_EDITING
+	}
+#endif
+}
+
+#ifdef CONFIG_BOOT_RETRY_TIME
+/***************************************************************************
+ * initialize command line timeout
+ */
+void init_cmd_timeout(void)
+{
+	char *s = getenv("bootretry");
+
+	if (s != NULL)
+		retry_time = (int)simple_strtol(s, NULL, 10);
+	else
+		retry_time =  CONFIG_BOOT_RETRY_TIME;
+
+	if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
+		retry_time = CONFIG_BOOT_RETRY_MIN;
+}
+
+/***************************************************************************
+ * reset command line timeout to retry_time seconds
+ */
+void reset_cmd_timeout(void)
+{
+	endtime = endtick(retry_time);
+}
+
+void bootretry_dont_retry(void)
+{
+	retry_time = -1;
+}
+
+#endif