hal/hal_utils/*: add new concat function

The new function can concatenate two null terminated C strings with a character separator inbetween.

hal/hal_utils/*: add new concat function
The new function can concatenate two null terminated C strings with a character separator inbetween.
96703bd4 · Lucas Russo · 4e66afa1 · 96703bd4 · 96703bd4
Commit 96703bd4 authored Jul 18, 2014 by Lucas Russo
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hal_utils.c hal/hal_utils/hal_utils.c +14 -0

hal_utils.h hal/hal_utils/hal_utils.h +4 -0

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--- a/hal/hal_utils/hal_utils.c
+++ b/hal/hal_utils/hal_utils.c
@@ -84,3 +84,17 @@ char *halutils_stringify_hex_key (uint32_t key)
 {
    return halutils_stringify_key (key, 16);
 }
+
+#define SEPARATOR_BYTES 1
+char *halutils_concat_strings (const char *str1, const char* str2, char sep)
+{
+    char *str = zmalloc (strlen(str1) + strlen(str2) +
+            SEPARATOR_BYTES /* separator length */+ 1 /* \0 */);
+    ASSERT_ALLOC(str, err_str_alloc);
+    sprintf (str, "%s%c%s", str1, sep, str2);
+
+    return str;
+
+err_str_alloc:
+    return NULL;
+}
--- a/hal/hal_utils/hal_utils.h
+++ b/hal/hal_utils/hal_utils.h
@@ -31,4 +31,8 @@ char *halutils_stringify_dec_key (uint32_t key);
 /* Allocates a string with the necessary size to fit an hexadecimal key */
 char *halutils_stringify_hex_key (uint32_t key);

+/* Concatenates 2 strings togheter with a separator. returns the string if
+ * OK, NULL in case of error */
+char *halutils_concat_strings (const char *str1, const char* str2, char sep);
+
 #endif