From c26e454dfc6650428854fa2db3b1ed7f19e0ba0e Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sun, 18 Apr 2004 10:13:26 +0000
Subject: Patches by Pantelis Antoniou, 16 Apr 2004: - add support for a new
 version of an Intracom board and fix   various other things on others. - add
 verify support to the crc32 command (define   CONFIG_CRC32_VERIFY to enable
 it) - fix FEC driver for MPC8xx systems:   1. fix compilation problems for
 boards that use dynamic      allocation of DPRAM   2. shut down FEC after
 network transfers - HUSH parser fixes:   1. A new test command was added.
 This is a simplified version of      the one in the bourne shell.   2. A new
 exit command was added which terminates the current      executing script.  
 3. Fixed handing of $? (exit code of last executed command)

---
 common/command.c | 153 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)

(limited to 'common/command.c')

diff --git a/common/command.c b/common/command.c
index df5d3e9bca..2b48a1c915 100644
--- a/common/command.c
+++ b/common/command.c
@@ -74,6 +74,159 @@ U_BOOT_CMD(
 	"    - echo args to console; \\c suppresses newline\n"
 );
 
+#ifdef CFG_HUSH_PARSER
+
+int
+do_test (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	char **ap;
+	int left, adv, expr, last_expr, neg, last_cmp;
+
+	/* args? */
+	if (argc < 3)
+		return 1;
+
+#if 0
+	{
+		printf("test:");
+		left = 1; 
+		while (argv[left])
+			printf(" %s", argv[left++]);
+	}
+#endif
+	
+	last_expr = 0;
+	left = argc - 1; ap = argv + 1;
+	if (left > 0 && strcmp(ap[0], "!") == 0) {
+		neg = 1;
+		ap++;
+		left--;
+	} else
+		neg = 0;
+
+	expr = -1;
+	last_cmp = -1;
+	last_expr = -1;
+	while (left > 0) {
+
+		if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
+			adv = 1;
+		else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
+			adv = 2;
+		else
+			adv = 3;
+
+		if (left < adv) {
+			expr = 1;
+			break;
+		}
+
+		if (adv == 1) {
+			if (strcmp(ap[0], "-o") == 0) {
+				last_expr = expr;
+				last_cmp = 0;
+			} else if (strcmp(ap[0], "-a") == 0) {
+				last_expr = expr;
+				last_cmp = 1;
+			} else {
+				expr = 1;
+				break;
+			}
+		}
+
+		if (adv == 2) {
+			if (strcmp(ap[0], "-z") == 0)
+				expr = strlen(ap[1]) == 0 ? 0 : 1;
+			else if (strcmp(ap[0], "-n") == 0)
+				expr = strlen(ap[1]) == 0 ? 1 : 0;
+			else {
+				expr = 1;
+				break;
+			}
+
+			if (last_cmp == 0)
+				expr = last_expr || expr;
+			else if (last_cmp == 1)
+				expr = last_expr && expr;
+			last_cmp = -1;
+		}
+
+		if (adv == 3) {
+			if (strcmp(ap[1], "=") == 0)
+				expr = strcmp(ap[0], ap[2]) == 0;
+			else if (strcmp(ap[1], "!=") == 0)
+				expr = strcmp(ap[0], ap[2]) != 0;
+			else if (strcmp(ap[1], ">") == 0)
+				expr = strcmp(ap[0], ap[2]) > 0;
+			else if (strcmp(ap[1], "<") == 0)
+				expr = strcmp(ap[0], ap[2]) < 0;
+			else if (strcmp(ap[1], "-eq") == 0)
+				expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
+			else if (strcmp(ap[1], "-ne") == 0)
+				expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
+			else if (strcmp(ap[1], "-lt") == 0)
+				expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
+			else if (strcmp(ap[1], "-le") == 0)
+				expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
+			else if (strcmp(ap[1], "-gt") == 0)
+				expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
+			else if (strcmp(ap[1], "-ge") == 0)
+				expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
+			else {
+				expr = 1;
+				break;
+			}
+
+			if (last_cmp == 0)
+				expr = last_expr || expr;
+			else if (last_cmp == 1)
+				expr = last_expr && expr;
+			last_cmp = -1;
+		}
+
+		ap += adv; left -= adv;
+	}
+
+	if (neg)
+		expr = !expr;
+
+	expr = !expr;
+
+#if 0
+	printf(": returns %d\n", expr);
+#endif
+
+	return expr;
+}
+
+U_BOOT_CMD(
+	test,	CFG_MAXARGS,	1,	do_test,
+ 	"test    - minimal test like /bin/sh\n",
+ 	"[args..]\n"
+	"    - test functionality\n"
+);
+
+int
+do_exit (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int r;
+
+	r = 0;
+	if (argc > 1)
+		r = simple_strtoul(argv[1], NULL, 10);
+
+	return -r - 2;
+}
+
+U_BOOT_CMD(
+	exit,	2,	1,	do_exit,
+ 	"exit    - exit script\n",
+	"    - exit functionality\n"
+);
+
+
+#endif
+
 /*
  * Use puts() instead of printf() to avoid printf buffer overflow
  * for long help messages
-- 
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