Inline CBS_init, CBS_data, and CBS_len

These are very basic accessors and we'll never make CBS opaque. Just
inline them so the compiler can optimize around them.

Change-Id: I65442acb9a89a611082c7e0c82b365c78adae7f4
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/66727
Auto-Submit: David Benjamin <davidben@google.com>
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

crypto/bytestring/cbs.c

diff --git a/crypto/bytestring/cbs.c b/crypto/bytestring/cbs.c
index 631f284..bf94db1 100644
--- a/crypto/bytestring/cbs.c
+++ b/crypto/bytestring/cbs.c
@@ -26,11 +26,6 @@
 #include "internal.h"
 
 
-void CBS_init(CBS *cbs, const uint8_t *data, size_t len) {
-  cbs->data = data;
-  cbs->len = len;
-}
-
 static int cbs_get(CBS *cbs, const uint8_t **p, size_t n) {
   if (cbs->len < n) {
     return 0;
@@ -47,14 +42,6 @@
   return cbs_get(cbs, &dummy, len);
 }
 
-const uint8_t *CBS_data(const CBS *cbs) {
-  return cbs->data;
-}
-
-size_t CBS_len(const CBS *cbs) {
-  return cbs->len;
-}
-
 int CBS_stow(const CBS *cbs, uint8_t **out_ptr, size_t *out_len) {
   OPENSSL_free(*out_ptr);
   *out_ptr = NULL;

include/openssl/bytestring.h

diff --git a/include/openssl/bytestring.h b/include/openssl/bytestring.h
index 7dce9c4..0d48628 100644
--- a/include/openssl/bytestring.h
+++ b/include/openssl/bytestring.h
@@ -58,17 +58,20 @@
 
 // CBS_init sets |cbs| to point to |data|. It does not take ownership of
 // |data|.
-OPENSSL_EXPORT void CBS_init(CBS *cbs, const uint8_t *data, size_t len);
+OPENSSL_INLINE void CBS_init(CBS *cbs, const uint8_t *data, size_t len) {
+  cbs->data = data;
+  cbs->len = len;
+}
 
 // CBS_skip advances |cbs| by |len| bytes. It returns one on success and zero
 // otherwise.
 OPENSSL_EXPORT int CBS_skip(CBS *cbs, size_t len);
 
 // CBS_data returns a pointer to the contents of |cbs|.
-OPENSSL_EXPORT const uint8_t *CBS_data(const CBS *cbs);
+OPENSSL_INLINE const uint8_t *CBS_data(const CBS *cbs) { return cbs->data; }
 
 // CBS_len returns the number of bytes remaining in |cbs|.
-OPENSSL_EXPORT size_t CBS_len(const CBS *cbs);
+OPENSSL_INLINE size_t CBS_len(const CBS *cbs) { return cbs->len; }
 
 // CBS_stow copies the current contents of |cbs| into |*out_ptr| and
 // |*out_len|. If |*out_ptr| is not NULL, the contents are freed with