4 files changed, 51 insertions, 4 deletions
diff --git a/src/core/lib/slice/slice.c b/src/core/lib/slice/slice.c
index f2c09d60e5..c377edd349 100644
--- a/src/core/lib/slice/slice.c
+++ b/src/core/lib/slice/slice.c
@@ -82,14 +82,18 @@ static const grpc_slice_refcount_vtable noop_refcount_vtable = {
     noop_ref, noop_unref, grpc_slice_default_hash_impl};
 static grpc_slice_refcount noop_refcount = {&noop_refcount_vtable};
 
-grpc_slice grpc_slice_from_static_string(const char *s) {
+grpc_slice grpc_slice_from_static_buffer(const void *s, size_t len) {
   grpc_slice slice;
   slice.refcount = &noop_refcount;
   slice.data.refcounted.bytes = (uint8_t *)s;
-  slice.data.refcounted.length = strlen(s);
+  slice.data.refcounted.length = len;
   return slice;
 }
 
+grpc_slice grpc_slice_from_static_string(const char *s) {
+  return grpc_slice_from_static_buffer(s, strlen(s));
+}
+
 /* grpc_slice_new support structures - we create a refcount object extended
    with the user provided data pointer & destroy function */
 typedef struct new_slice_refcount {
@@ -384,3 +388,41 @@ int grpc_slice_is_equivalent(grpc_slice a, grpc_slice b) {
   return a.data.refcounted.length == b.data.refcounted.length &&
          a.data.refcounted.bytes == b.data.refcounted.bytes;
 }
+
+int grpc_slice_buf_start_eq(grpc_slice a, const void *b, size_t len) {
+  if (GRPC_SLICE_LENGTH(a) < len) return 0;
+  return 0 == memcmp(GRPC_SLICE_START_PTR(a), b, len);
+}
+
+int grpc_slice_rchr(grpc_slice s, char c) {
+  const char *b = (const char *)GRPC_SLICE_START_PTR(s);
+  int i;
+  for (i = (int)GRPC_SLICE_LENGTH(s) - 1; i != -1 && b[i] != c; i--)
+    ;
+  return i;
+}
+
+int grpc_slice_chr(grpc_slice s, char c) {
+  const char *b = (const char *)GRPC_SLICE_START_PTR(s);
+  const char *p = memchr(b, c, GRPC_SLICE_LENGTH(s));
+  return p == NULL ? -1 : (int)(p - b);
+}
+
+int grpc_slice_slice(grpc_slice haystack, grpc_slice needle) {
+  size_t haystack_len = GRPC_SLICE_LENGTH(haystack);
+  const uint8_t *haystack_bytes = GRPC_SLICE_START_PTR(haystack);
+  size_t needle_len = GRPC_SLICE_LENGTH(needle);
+  const uint8_t *needle_bytes = GRPC_SLICE_START_PTR(needle);
+
+  if (haystack_len == 0 || needle_len == 0) return -1;
+  if (haystack_len < needle_len) return -1;
+  if (needle_len == 1) return grpc_slice_chr(haystack, (char)*needle_bytes);
+
+  const uint8_t *last = haystack_bytes + haystack_len - needle_len;
+  for (const uint8_t *cur = haystack_bytes; cur != last; ++cur) {
+    if (0 == memcmp(cur, needle_bytes, needle_len)) {
+      return (int)(cur - haystack_bytes);
+    }
+  }
+  return -1;
+}
diff --git a/src/core/lib/slice/slice_intern.c b/src/core/lib/slice/slice_intern.c
index a7e17527c3..b5e00a38d7 100644
--- a/src/core/lib/slice/slice_intern.c
+++ b/src/core/lib/slice/slice_intern.c
@@ -206,7 +206,7 @@ grpc_slice grpc_slice_intern(grpc_slice slice) {
   return materialize(s);
 }
 
-void grpc_test_only_set_slice_interning_hash_seed(uint32_t seed) {
+void grpc_test_only_set_slice_hash_seed(uint32_t seed) {
   g_hash_seed = seed;
   g_forced_hash_seed = 1;
 }
diff --git a/src/core/lib/slice/slice_internal.h b/src/core/lib/slice/slice_internal.h
index 8bfe066fdb..bf9117c74e 100644
--- a/src/core/lib/slice/slice_internal.h
+++ b/src/core/lib/slice/slice_internal.h
@@ -48,6 +48,6 @@ void grpc_slice_buffer_destroy_internal(grpc_exec_ctx *exec_ctx,
 
 void grpc_slice_intern_init(void);
 void grpc_slice_intern_shutdown(void);
-void grpc_test_only_set_slice_interning_hash_seed(uint32_t key);
+void grpc_test_only_set_slice_hash_seed(uint32_t key);
 
 #endif /* GRPC_CORE_LIB_SLICE_SLICE_INTERNAL_H */
diff --git a/src/core/lib/slice/slice_string_helpers.c b/src/core/lib/slice/slice_string_helpers.c
index 839c366b32..99695007cc 100644
--- a/src/core/lib/slice/slice_string_helpers.c
+++ b/src/core/lib/slice/slice_string_helpers.c
@@ -88,3 +88,8 @@ void grpc_slice_split(grpc_slice str, const char *sep, grpc_slice_buffer *dst) {
     grpc_slice_buffer_add_indexed(dst, grpc_slice_ref_internal(str));
   }
 }
+
+bool grpc_parse_slice_to_uint32(grpc_slice str, uint32_t *result) {
+  return gpr_parse_bytes_to_uint32((const char *)GRPC_SLICE_START_PTR(str),
+                                   GRPC_SLICE_LENGTH(str), result) != 0;
+}