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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2014-10-13 15:55:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-14 02:18:26 +0200
commitc8250381c8272a9828fdd353171727b154fbd296 (patch)
tree050650d45d87d430334939f0552deafbe36561f9 /include
parent45ff337a54c154680edf0c538e5c9eb4a2f862cc (diff)
lib / string_helpers: introduce string_escape_mem()
This is almost the opposite function to string_unescape(). Nevertheless it handles \0 and could be used for any byte buffer. The documentation is supplied together with the function prototype. The test cases covers most of the scenarios and would be expanded later on. [akpm@linux-foundation.org: avoid 1k stack consumption] Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: "John W . Linville" <linville@tuxdriver.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Joe Perches <joe@perches.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/string_helpers.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h
index 5a30f2a86239..6eb567ac56bc 100644
--- a/include/linux/string_helpers.h
+++ b/include/linux/string_helpers.h
@@ -37,4 +37,35 @@ static inline int string_unescape_any_inplace(char *buf)
return string_unescape_any(buf, buf, 0);
}
+#define ESCAPE_SPACE 0x01
+#define ESCAPE_SPECIAL 0x02
+#define ESCAPE_NULL 0x04
+#define ESCAPE_OCTAL 0x08
+#define ESCAPE_ANY \
+ (ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_SPECIAL | ESCAPE_NULL)
+#define ESCAPE_NP 0x10
+#define ESCAPE_ANY_NP (ESCAPE_ANY | ESCAPE_NP)
+#define ESCAPE_HEX 0x20
+
+int string_escape_mem(const char *src, size_t isz, char **dst, size_t osz,
+ unsigned int flags, const char *esc);
+
+static inline int string_escape_mem_any_np(const char *src, size_t isz,
+ char **dst, size_t osz, const char *esc)
+{
+ return string_escape_mem(src, isz, dst, osz, ESCAPE_ANY_NP, esc);
+}
+
+static inline int string_escape_str(const char *src, char **dst, size_t sz,
+ unsigned int flags, const char *esc)
+{
+ return string_escape_mem(src, strlen(src), dst, sz, flags, esc);
+}
+
+static inline int string_escape_str_any_np(const char *src, char **dst,
+ size_t sz, const char *esc)
+{
+ return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, esc);
+}
+
#endif