diff --git a/main.c b/main.c
index f2c7736..8c1405a 100644
--- a/main.c
+++ b/main.c
@@ -89,6 +89,16 @@ struct ctx {
     };
 };
 
+#define BUFFERING_ON()  \
+    ctx->doc.flags |= DOC_BUFFERING; \
+    ctx->buf.salen = ctx->buf.sa.len
+
+#define BUFFERING_OFF(bstr,blen)  \
+    const char *bstr = ctx->buf.sa.s + ctx->buf.salen; \
+    size_t blen = ctx->buf.sa.len - ctx->buf.salen; \
+    ctx->buf.sa.len = ctx->buf.salen; \
+    ctx->doc.flags &= ~DOC_BUFFERING
+
 enum {
     ERR_PARSER_ENTER_BLOCK  = -100,
     ERR_PARSER_LEAVE_BLOCK  = -101,
@@ -409,8 +419,7 @@ enter_block(MD_BLOCKTYPE type, void *details, void *ctx_)
                     }
 
                     if (ctx->code.flags & CODE_BUFFERED) {
-                        ctx->doc.flags |= DOC_BUFFERING;
-                        ctx->buf.salen = ctx->buf.sa.len;
+                        BUFFERING_ON();
                     } else {
                         return (raw_str(ctx, "<pre>")) ? 0 : ERR_PARSER_ENTER_BLOCK;
                     }
@@ -479,10 +488,7 @@ leave_block(MD_BLOCKTYPE type, void *details, void *ctx_)
                 if (d->level != ctx->title.level)
                     return ERR_INVALID;
 
-                const char *s = ctx->buf.sa.s + ctx->buf.salen;
-                size_t l = ctx->buf.sa.len - ctx->buf.salen;
-                ctx->buf.sa.len = ctx->buf.salen;
-                ctx->doc.flags &= ~DOC_BUFFERING;
+                BUFFERING_OFF(s, l);
 
                 char buf[UINT32_FMT];
                 buf[uint32_fmt(buf, (uint32) ctx->title.level)] = '\0';
@@ -522,10 +528,7 @@ leave_block(MD_BLOCKTYPE type, void *details, void *ctx_)
                 if (!(ctx->code.flags & CODE_BUFFERED)) {
                     return (raw_str(ctx, "</pre>")) ? 0 : ERR_PARSER_LEAVE_BLOCK;
                 } else {
-                    const char *buf = ctx->buf.sa.s + ctx->buf.salen;
-                    size_t blen = ctx->buf.sa.len - ctx->buf.salen;
-                    ctx->buf.sa.len = ctx->buf.salen;
-                    ctx->doc.flags &= ~DOC_BUFFERING;
+                    BUFFERING_OFF(buf, blen);
 
                     if (ctx->code.flags & CODE_LINES) {
                         const char *s = buf;