Optionally emit NUL/CAN/SUB/DEL from the parser rather than just igno…

…ring them
neovim · Jan 15, 2023 · b891076 · b891076
1 parent b47ce71
commit b891076
Show file tree

Hide file tree

Showing 4 changed files with 18 additions and 0 deletions.
diff --git a/include/vterm.h b/include/vterm.h
@@ -413,6 +413,11 @@ typedef struct {
 void  vterm_parser_set_callbacks(VTerm *vt, const VTermParserCallbacks *callbacks, void *user);
 void *vterm_parser_get_cbdata(VTerm *vt);
 
+/* Normally NUL, CAN, SUB and DEL are ignored. Setting this true causes them
+ * to be emitted by the 'control' callback
+ */
+void vterm_parser_set_emit_nul(VTerm *vt, bool emit);
+
 // -----------
 // State layer
 // -----------

diff --git a/src/parser.c b/src/parser.c
@@ -145,11 +145,15 @@ size_t vterm_input_write(VTerm *vt, const char *bytes, size_t len)
         string_fragment(vt, string_start, bytes + pos - string_start, false);
         string_start = bytes + pos + 1;
       }
+      if(vt->parser.emit_nul)
+        do_control(vt, c);
       continue;
     }
     if(c == 0x18 || c == 0x1a) { // CAN, SUB
       vt->parser.in_esc = false;
       ENTER_NORMAL_STATE();
+      if(vt->parser.emit_nul)
+        do_control(vt, c);
       continue;
     }
     else if(c == 0x1b) { // ESC
@@ -391,3 +395,8 @@ void *vterm_parser_get_cbdata(VTerm *vt)
 {
   return vt->parser.cbdata;
 }
+
+void vterm_parser_set_emit_nul(VTerm *vt, bool emit)
+{
+  vt->parser.emit_nul = emit;
+}
diff --git a/src/vterm.c b/src/vterm.c
@@ -66,6 +66,8 @@ VTerm *vterm_build(const struct VTermBuilder *builder)
   vt->parser.callbacks = NULL;
   vt->parser.cbdata    = NULL;
 
+  vt->parser.emit_nul  = false;
+
   vt->outfunc = NULL;
   vt->outdata = NULL;
 

diff --git a/src/vterm_internal.h b/src/vterm_internal.h
@@ -227,6 +227,8 @@ struct VTerm
     void *cbdata;
 
     bool string_initial;
+
+    bool emit_nul;
   } parser;
 
   /* len == malloc()ed size; cur == number of valid bytes */