utils/string: Add mem2strbytes()

ulpatch/build$ ./src/tests/ulpatch_test -f Utils_str.mem2strbytes -v --lv dbg ========================================= === === ULPatch Testing === === version: v0.5.12-69-g16a40-dirty === --------------------------- === 105/107 Utils_str.mem2strbytes s = <0x11> (0x11) s = <(null)> (0x11) s = <0x11,0x22> (0x11,0x22) s = <0x11#0x22> (0x11#0x22) s = <0x11,0x22,0x33,0x44,0x55,0x66,0x77> (0x11,0x22,0x33,0x44,0x55,0x66,0x77) 13us OK ret:0:0 ========================================= === Total 1 tested === Success 1 === Failed 0 === Spend 0ms 0.01ms/per ========================================= Signed-off-by: Rong Tao <[email protected]>
Rtoax · Jan 16, 2025 · 3741637 · 3741637
1 parent 16a4008
commit 3741637
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diff --git a/src/tests/utils/string.c b/src/tests/utils/string.c
@@ -217,3 +217,71 @@ TEST(Utils_str, strbytes2mem, 0)
 
 	return ret;
 }
+
+TEST(Utils_str, mem2strbytes, 0)
+{
+	int i, err = 0;
+	char buf[1024];
+
+	struct {
+		uint8_t mem[128];
+		size_t mem_len;
+		char *expect_buf;
+		size_t buf_len;
+		char seperator;
+		int expect_errno;
+	} tests[] = {
+		{
+			.mem = {0x11},
+			.mem_len = 1,
+			.expect_buf = "0x11",
+			.buf_len = 5,
+			.seperator = ',',
+		},
+		{
+			.mem = {0x11},
+			.mem_len = 1,
+			.expect_buf = "0x11",
+			.buf_len = 4,
+			.seperator = ',',
+			.expect_errno = EINVAL,
+		},
+		{
+			.mem = {0x11,0x22},
+			.mem_len = 2,
+			.expect_buf = "0x11,0x22",
+			.buf_len = 10,
+			.seperator = ',',
+		},
+		{
+			.mem = {0x11,0x22},
+			.mem_len = 2,
+			.expect_buf = "0x11#0x22",
+			.buf_len = 10,
+			.seperator = '#',
+		},
+		{
+			.mem = {0x11,0x22,0x33,0x44,0x55,0x66,0x77},
+			.mem_len = 7,
+			.expect_buf = "0x11,0x22,0x33,0x44,0x55,0x66,0x77",
+			.buf_len = 35,
+			.seperator = ',',
+		},
+	};
+
+	for (i = 0; i < ARRAY_SIZE(tests); i++) {
+		char *s = mem2strbytes(tests[i].mem, tests[i].mem_len, buf,
+				       tests[i].buf_len, tests[i].seperator);
+
+		if (strcmp(buf, tests[i].expect_buf)) {
+			err++;
+		}
+
+		if (tests[i].expect_errno != errno)
+			err++;
+
+		printf("s = <%s> (%s)\n", s, tests[i].expect_buf);
+	}
+
+	return err;
+}
diff --git a/src/utils/string.c b/src/utils/string.c
@@ -196,6 +196,53 @@ void *strbytes2mem(const char *bytes, size_t *nbytes, void *buf, size_t buf_len,
 	return buf;
 }
 
+/**
+ * memory to bytes string buffer.
+ */
+char *mem2strbytes(const void *mem, size_t mem_len, char *bytes_buf,
+		   size_t buf_len, char seperator)
+{
+	int i;
+
+	errno = 0;
+
+	if (!mem || mem_len < 1 || !bytes_buf || buf_len < 5) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	/**
+	 * mem     = 0x123456
+	 * mem_len = 3
+	 * buf_len = "0x12,0x34,0x56\0"
+	 *            ^^^^^ 5
+	 */
+	if (buf_len < 5 * mem_len) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	bytes_buf[0] = '\0';
+	for (i = 0; i < mem_len; i++) {
+		uint8_t u8 = *(uint8_t *)(mem + i);
+		char *s = bytes_buf + i * 5;
+		/**
+		 * "0x12,0x34,0x56\0"
+		 *            ^^^^^
+		 */
+		if (i == mem_len - 1)
+			sprintf(s, "0x%02x", u8);
+		/**
+		 * "0x12,0x34,0x56\0"
+		 *  ^^^^^
+		 */
+		else
+			sprintf(s, "0x%02x%c", u8, seperator);
+	}
+
+	return bytes_buf;
+}
+
 /* Return TRUE if the start of STR matches PREFIX, FALSE otherwise.  */
 int ulp_startswith(const char *str, const char *prefix)
 {

diff --git a/src/utils/util.h b/src/utils/util.h
@@ -229,6 +229,8 @@ unsigned long str2size(const char *str);
 unsigned long str2addr(const char *str);
 void *strbytes2mem(const char *bytes, size_t *nbytes, void *buf, size_t buf_len,
 		   char seperator);
+char *mem2strbytes(const void *mem, size_t mem_len, char *bytes_buf,
+		   size_t buf_len, char seperator);
 
 int fmembytes(FILE *fp, const void *data, int data_len);