diff options
| -rw-r--r-- | lib/talloc/talloc.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/lib/talloc/talloc.h b/lib/talloc/talloc.h index 85c8ce9d6d..419bb53ea1 100644 --- a/lib/talloc/talloc.h +++ b/lib/talloc/talloc.h @@ -1317,7 +1317,26 @@ char *talloc_strdup(const void *t, const char *p); char *talloc_strdup_append(char *s, const char *a); /** - * @brief Append a string to a given buffer and duplicate the result. + * @brief Append a string to a given buffer. + * + * This is a more efficient version of talloc_strdup_append(). It determines the + * length of the destination string by the size of the talloc context. + * + * Use this very carefully as it produces a different result than + * talloc_strdup_append() when a zero character is in the middle of the + * destination string. + * + * @code + * char *str_a = talloc_strdup(NULL, "hello world"); + * char *str_b = talloc_strdup(NULL, "hello world"); + * str_a[5] = str_b[5] = '\0' + * + * char *app = talloc_strdup_append(str_a, ", hello"); + * char *buf = talloc_strdup_append_buffer(str_b, ", hello"); + * + * printf("%s\n", app); // hello, hello (app = "hello, hello") + * printf("%s\n", buf); // hello (buf = "hello\0world, hello") + * @endcode * * @param[in] s The destination buffer to append to. * @@ -1326,6 +1345,8 @@ char *talloc_strdup_append(char *s, const char *a); * @return The duplicated string, NULL on error. * * @see talloc_strdup() + * @see talloc_strdup_append() + * @see talloc_array_length() */ char *talloc_strdup_append_buffer(char *s, const char *a); |