examples/ip_pipeline: add hex parsing

This patch adds parse_hex_string function to parse hex string to uint8_t
array.

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

diff --git a/examples/ip_pipeline/config_parse.c b/examples/ip_pipeline/config_parse.c
index a35bd3e..d866310 100644 (file)
--- a/examples/ip_pipeline/config_parse.c
+++ b/examples/ip_pipeline/config_parse.c
@@ -465,6 +465,58 @@ parse_pipeline_core(uint32_t *socket,
        return 0;
 }
 
+static uint32_t
+get_hex_val(char c)
+{
+       switch (c) {
+       case '0': case '1': case '2': case '3': case '4': case '5':
+       case '6': case '7': case '8': case '9':
+               return c - '0';
+       case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+               return c - 'A' + 10;
+       case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+               return c - 'a' + 10;
+       default:
+               return 0;
+       }
+}
+
+int
+parse_hex_string(char *src, uint8_t *dst, uint32_t *size)
+{
+       char *c;
+       uint32_t len, i;
+
+       /* Check input parameters */
+       if ((src == NULL) ||
+               (dst == NULL) ||
+               (size == NULL) ||
+               (*size == 0))
+               return -1;
+
+       len = strlen(src);
+       if (((len & 3) != 0) ||
+               (len > (*size) * 2))
+               return -1;
+       *size = len / 2;
+
+       for (c = src; *c != 0; c++) {
+               if ((((*c) >= '0') && ((*c) <= '9')) ||
+                       (((*c) >= 'A') && ((*c) <= 'F')) ||
+                       (((*c) >= 'a') && ((*c) <= 'f')))
+                       continue;
+
+               return -1;
+       }
+
+       /* Convert chars to bytes */
+       for (i = 0; i < *size; i++)
+               dst[i] = get_hex_val(src[2 * i]) * 16 +
+                       get_hex_val(src[2 * i + 1]);
+
+       return 0;
+}
+
 static size_t
 skip_digits(const char *src)
 {

diff --git a/examples/ip_pipeline/pipeline_be.h b/examples/ip_pipeline/pipeline_be.h
index f7269c0..0ba00f6 100644 (file)
--- a/examples/ip_pipeline/pipeline_be.h
+++ b/examples/ip_pipeline/pipeline_be.h
@@ -271,4 +271,8 @@ struct pipeline_be_ops {
        pipeline_be_op_track f_track;
 };
 
+/* Parse hex string to uint8_t array */
+int
+parse_hex_string(char *src, uint8_t *dst, uint32_t *size);
+
 #endif