Moved Huffman coding out of HTTP/2.

ngx_http_v2_huff_decode.c and ngx_http_v2_huff_encode.c are renamed
to ngx_http_huff_decode.c and ngx_http_huff_encode.c.

9 files changed, 53 insertions, 45 deletions

diff --git a/auto/modules b/auto/modules
index f5a459783..94867bfc0 100644
--- a/auto/modules
+++ b/auto/modules
@@ -102,6 +102,11 @@ if [ $HTTP = YES ]; then
     fi
 
 
+    if [ $HTTP_V2 = YES ]; then
+        HTTP_SRCS="$HTTP_SRCS $HTTP_HUFF_SRCS"
+    fi
+
+
     # the module order is important
     #     ngx_http_static_module
     #     ngx_http_gzip_static_module
@@ -414,8 +419,6 @@ if [ $HTTP = YES ]; then
         ngx_module_srcs="src/http/v2/ngx_http_v2.c \
                          src/http/v2/ngx_http_v2_table.c \
                          src/http/v2/ngx_http_v2_encode.c \
-                         src/http/v2/ngx_http_v2_huff_decode.c \
-                         src/http/v2/ngx_http_v2_huff_encode.c \
                          src/http/v2/ngx_http_v2_module.c"
         ngx_module_libs=
         ngx_module_link=$HTTP_V2
diff --git a/auto/sources b/auto/sources
index 3dad11132..156f7979e 100644
--- a/auto/sources
+++ b/auto/sources
@@ -255,3 +255,6 @@ NGX_WIN32_RC="src/os/win32/nginx.rc"
 
 
 HTTP_FILE_CACHE_SRCS=src/http/ngx_http_file_cache.c
+
+HTTP_HUFF_SRCS="src/http/ngx_http_huff_decode.c
+                src/http/ngx_http_huff_encode.c"
diff --git a/src/http/modules/ngx_http_grpc_module.c b/src/http/modules/ngx_http_grpc_module.c
index 6842b7c6e..864fc4fda 100644
--- a/src/http/modules/ngx_http_grpc_module.c
+++ b/src/http/modules/ngx_http_grpc_module.c
@@ -3180,10 +3180,10 @@ ngx_http_grpc_parse_fragment(ngx_http_request_t *r, ngx_http_grpc_ctx_t *ctx,
             ctx->field_rest -= size;
 
             if (ctx->field_huffman) {
-                if (ngx_http_v2_huff_decode(&ctx->field_state, p, size,
-                                            &ctx->field_end,
-                                            ctx->field_rest == 0,
-                                            r->connection->log)
+                if (ngx_http_huff_decode(&ctx->field_state, p, size,
+                                         &ctx->field_end,
+                                         ctx->field_rest == 0,
+                                         r->connection->log)
                     != NGX_OK)
                 {
                     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
@@ -3289,10 +3289,10 @@ ngx_http_grpc_parse_fragment(ngx_http_request_t *r, ngx_http_grpc_ctx_t *ctx,
             ctx->field_rest -= size;
 
             if (ctx->field_huffman) {
-                if (ngx_http_v2_huff_decode(&ctx->field_state, p, size,
-                                            &ctx->field_end,
-                                            ctx->field_rest == 0,
-                                            r->connection->log)
+                if (ngx_http_huff_decode(&ctx->field_state, p, size,
+                                         &ctx->field_end,
+                                         ctx->field_rest == 0,
+                                         r->connection->log)
                     != NGX_OK)
                 {
                     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
diff --git a/src/http/ngx_http.h b/src/http/ngx_http.h
index 8b43857ee..be8b7cd71 100644
--- a/src/http/ngx_http.h
+++ b/src/http/ngx_http.h
@@ -167,6 +167,14 @@ ngx_uint_t  ngx_http_degraded(ngx_http_request_t *);
 #endif
 
 
+#if (NGX_HTTP_V2)
+ngx_int_t ngx_http_huff_decode(u_char *state, u_char *src, size_t len,
+    u_char **dst, ngx_uint_t last, ngx_log_t *log);
+size_t ngx_http_huff_encode(u_char *src, size_t len, u_char *dst,
+    ngx_uint_t lower);
+#endif
+
+
 extern ngx_module_t  ngx_http_module;
 
 extern ngx_str_t  ngx_http_html_default_types[];
diff --git a/src/http/v2/ngx_http_v2_huff_decode.c b/src/http/ngx_http_huff_decode.c
index 49ca576f7..14b7b7896 100644
--- a/src/http/v2/ngx_http_v2_huff_decode.c
+++ b/src/http/ngx_http_huff_decode.c
@@ -15,14 +15,14 @@ typedef struct {
     u_char  emit;
     u_char  sym;
     u_char  ending;
-} ngx_http_v2_huff_decode_code_t;
+} ngx_http_huff_decode_code_t;
 
 
-static ngx_inline ngx_int_t ngx_http_v2_huff_decode_bits(u_char *state,
+static ngx_inline ngx_int_t ngx_http_huff_decode_bits(u_char *state,
     u_char *ending, ngx_uint_t bits, u_char **dst);
 
 
-static ngx_http_v2_huff_decode_code_t  ngx_http_v2_huff_decode_codes[256][16] =
+static ngx_http_huff_decode_code_t  ngx_http_huff_decode_codes[256][16] =
 {
     /* 0 */
     {
@@ -2640,7 +2640,7 @@ static ngx_http_v2_huff_decode_code_t  ngx_http_v2_huff_decode_codes[256][16] =
 
 
 ngx_int_t
-ngx_http_v2_huff_decode(u_char *state, u_char *src, size_t len, u_char **dst,
+ngx_http_huff_decode(u_char *state, u_char *src, size_t len, u_char **dst,
     ngx_uint_t last, ngx_log_t *log)
 {
     u_char  *end, ch, ending;
@@ -2653,7 +2653,7 @@ ngx_http_v2_huff_decode(u_char *state, u_char *src, size_t len, u_char **dst,
     while (src != end) {
         ch = *src++;
 
-        if (ngx_http_v2_huff_decode_bits(state, &ending, ch >> 4, dst)
+        if (ngx_http_huff_decode_bits(state, &ending, ch >> 4, dst)
             != NGX_OK)
         {
             ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
@@ -2663,7 +2663,7 @@ ngx_http_v2_huff_decode(u_char *state, u_char *src, size_t len, u_char **dst,
             return NGX_ERROR;
         }
 
-        if (ngx_http_v2_huff_decode_bits(state, &ending, ch & 0xf, dst)
+        if (ngx_http_huff_decode_bits(state, &ending, ch & 0xf, dst)
             != NGX_OK)
         {
             ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
@@ -2692,12 +2692,12 @@ ngx_http_v2_huff_decode(u_char *state, u_char *src, size_t len, u_char **dst,
 
 
 static ngx_inline ngx_int_t
-ngx_http_v2_huff_decode_bits(u_char *state, u_char *ending, ngx_uint_t bits,
+ngx_http_huff_decode_bits(u_char *state, u_char *ending, ngx_uint_t bits,
     u_char **dst)
 {
-    ngx_http_v2_huff_decode_code_t  code;
+    ngx_http_huff_decode_code_t  code;
 
-    code = ngx_http_v2_huff_decode_codes[*state][bits];
+    code = ngx_http_huff_decode_codes[*state][bits];
 
     if (code.next == *state) {
         return NGX_ERROR;
diff --git a/src/http/v2/ngx_http_v2_huff_encode.c b/src/http/ngx_http_huff_encode.c
index 3f822cd0b..c03b153da 100644
--- a/src/http/v2/ngx_http_v2_huff_encode.c
+++ b/src/http/ngx_http_huff_encode.c
@@ -14,10 +14,10 @@
 typedef struct {
     uint32_t  code;
     uint32_t  len;
-} ngx_http_v2_huff_encode_code_t;
+} ngx_http_huff_encode_code_t;
 
 
-static ngx_http_v2_huff_encode_code_t  ngx_http_v2_huff_encode_table[256] =
+static ngx_http_huff_encode_code_t  ngx_http_huff_encode_table[256] =
 {
     {0x00001ff8, 13}, {0x007fffd8, 23}, {0x0fffffe2, 28}, {0x0fffffe3, 28},
     {0x0fffffe4, 28}, {0x0fffffe5, 28}, {0x0fffffe6, 28}, {0x0fffffe7, 28},
@@ -87,7 +87,7 @@ static ngx_http_v2_huff_encode_code_t  ngx_http_v2_huff_encode_table[256] =
 
 
 /* same as above, but embeds lowercase transformation */
-static ngx_http_v2_huff_encode_code_t  ngx_http_v2_huff_encode_table_lc[256] =
+static ngx_http_huff_encode_code_t  ngx_http_huff_encode_table_lc[256] =
 {
     {0x00001ff8, 13}, {0x007fffd8, 23}, {0x0fffffe2, 28}, {0x0fffffe3, 28},
     {0x0fffffe4, 28}, {0x0fffffe5, 28}, {0x0fffffe6, 28}, {0x0fffffe7, 28},
@@ -161,10 +161,10 @@ static ngx_http_v2_huff_encode_code_t  ngx_http_v2_huff_encode_table_lc[256] =
 #if (NGX_HAVE_LITTLE_ENDIAN)
 
 #if (NGX_HAVE_GCC_BSWAP64)
-#define ngx_http_v2_huff_encode_buf(dst, buf)                                 \
+#define ngx_http_huff_encode_buf(dst, buf)                                    \
     (*(uint64_t *) (dst) = __builtin_bswap64(buf))
 #else
-#define ngx_http_v2_huff_encode_buf(dst, buf)                                 \
+#define ngx_http_huff_encode_buf(dst, buf)                                    \
     ((dst)[0] = (u_char) ((buf) >> 56),                                       \
      (dst)[1] = (u_char) ((buf) >> 48),                                       \
      (dst)[2] = (u_char) ((buf) >> 40),                                       \
@@ -176,28 +176,28 @@ static ngx_http_v2_huff_encode_code_t  ngx_http_v2_huff_encode_table_lc[256] =
 #endif
 
 #else /* !NGX_HAVE_LITTLE_ENDIAN */
-#define ngx_http_v2_huff_encode_buf(dst, buf)                                 \
+#define ngx_http_huff_encode_buf(dst, buf)                                    \
     (*(uint64_t *) (dst) = (buf))
 #endif
 
 #else /* NGX_PTR_SIZE == 4 */
 
-#define ngx_http_v2_huff_encode_buf(dst, buf)                                 \
+#define ngx_http_huff_encode_buf(dst, buf)                                    \
     (*(uint32_t *) (dst) = htonl(buf))
 
 #endif
 
 
 size_t
-ngx_http_v2_huff_encode(u_char *src, size_t len, u_char *dst, ngx_uint_t lower)
+ngx_http_huff_encode(u_char *src, size_t len, u_char *dst, ngx_uint_t lower)
 {
-    u_char                          *end;
-    size_t                           hlen;
-    ngx_uint_t                       buf, pending, code;
-    ngx_http_v2_huff_encode_code_t  *table, *next;
+    u_char                       *end;
+    size_t                        hlen;
+    ngx_uint_t                    buf, pending, code;
+    ngx_http_huff_encode_code_t  *table, *next;
 
-    table = lower ? ngx_http_v2_huff_encode_table_lc
-                  : ngx_http_v2_huff_encode_table;
+    table = lower ? ngx_http_huff_encode_table_lc
+                  : ngx_http_huff_encode_table;
     hlen = 0;
     buf = 0;
     pending = 0;
@@ -224,7 +224,7 @@ ngx_http_v2_huff_encode(u_char *src, size_t len, u_char *dst, ngx_uint_t lower)
 
         buf |= code >> pending;
 
-        ngx_http_v2_huff_encode_buf(&dst[hlen], buf);
+        ngx_http_huff_encode_buf(&dst[hlen], buf);
 
         hlen += sizeof(buf);
 
diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
index 3afa8b638..0e45a7b27 100644
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -1600,10 +1600,10 @@ ngx_http_v2_state_field_huff(ngx_http_v2_connection_t *h2c, u_char *pos,
     h2c->state.length -= size;
     h2c->state.field_rest -= size;
 
-    if (ngx_http_v2_huff_decode(&h2c->state.field_state, pos, size,
-                                &h2c->state.field_end,
-                                h2c->state.field_rest == 0,
-                                h2c->connection->log)
+    if (ngx_http_huff_decode(&h2c->state.field_state, pos, size,
+                             &h2c->state.field_end,
+                             h2c->state.field_rest == 0,
+                             h2c->connection->log)
         != NGX_OK)
     {
         ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,
diff --git a/src/http/v2/ngx_http_v2.h b/src/http/v2/ngx_http_v2.h
index 0eceae3d5..70ee287ae 100644
--- a/src/http/v2/ngx_http_v2.h
+++ b/src/http/v2/ngx_http_v2.h
@@ -311,12 +311,6 @@ ngx_int_t ngx_http_v2_add_header(ngx_http_v2_connection_t *h2c,
 ngx_int_t ngx_http_v2_table_size(ngx_http_v2_connection_t *h2c, size_t size);
 
 
-ngx_int_t ngx_http_v2_huff_decode(u_char *state, u_char *src, size_t len,
-    u_char **dst, ngx_uint_t last, ngx_log_t *log);
-size_t ngx_http_v2_huff_encode(u_char *src, size_t len, u_char *dst,
-    ngx_uint_t lower);
-
-
 #define ngx_http_v2_prefix(bits)  ((1 << (bits)) - 1)
 
 
diff --git a/src/http/v2/ngx_http_v2_encode.c b/src/http/v2/ngx_http_v2_encode.c
index ac792084e..8798aa9ae 100644
--- a/src/http/v2/ngx_http_v2_encode.c
+++ b/src/http/v2/ngx_http_v2_encode.c
@@ -20,7 +20,7 @@ ngx_http_v2_string_encode(u_char *dst, u_char *src, size_t len, u_char *tmp,
 {
     size_t  hlen;
 
-    hlen = ngx_http_v2_huff_encode(src, len, tmp, lower);
+    hlen = ngx_http_huff_encode(src, len, tmp, lower);
 
     if (hlen > 0) {
         *dst = NGX_HTTP_V2_ENCODE_HUFF;