Initial revision

semantics.c

@@ -0,0 +1,79 @@
+#include <stdio.h>
+
+#include "type.h"
+#include "parser.tab.h"
+#include "semantics.h"
+
+
+FILE *yyin;
+int line;  /* line number in spec file */
+
+
+int input_count;   /* total input pages in spec */
+int output_count;  /* total output pages in spec */
+
+
+void input_push_context (input_context_type_t type)
+{
+};
+
+void input_pop_context (void)
+{
+};
+
+void input_set_file (char *name)
+{
+};
+
+void input_images (int first, int last)
+{
+  input_count += ((last - first) + 1);
+  if (first == last)
+    printf ("image %d\n", first);
+  else
+    printf ("iamges %d..%d\n", first, last);
+}
+
+void output_set_file (char *name)
+{
+};
+
+void output_pages (int first, int last)
+{
+  output_count += ((last - first) + 1);
+  if (first == last)
+    printf ("page %d\n", first);
+  else
+    printf ("pages %d..%d\n", first, last);
+}
+
+
+void yyerror (char *s)
+{
+  fprintf (stderr, "%d: %s\n", line, s);
+}
+
+
+boolean parse_spec_file (char *fn)
+{
+  boolean result = 0;
+
+  yyin = fopen (fn, "r");
+  if (! yyin)
+    {
+      fprintf (stderr, "can't open spec file '%s'\n", fn);
+      goto fail;
+    }
+
+  line = 1;
+
+  yyparse ();
+
+  result = 1;
+
+ fail:
+  if (yyin)
+    fclose (yyin);
+
+  return (result);
+}

semantics.h

@@ -0,0 +1,27 @@
+typedef enum
+{
+  INPUT_CONTEXT_ALL,
+  INPUT_CONTEXT_ODD,
+  INPUT_CONTEXT_EVEN
+} input_context_type_t;
+
+
+extern int line;  /* line number in spec file */
+
+
+extern int input_count;   /* total input pages in spec */
+extern int output_count;  /* total output pages in spec */
+
+
+boolean parse_spec_file (char *fn);
+
+
+/* semantic routines for input statements */
+void input_push_context (input_context_type_t type);
+void input_pop_context (void);
+void input_set_file (char *name);
+void input_images (int first, int last);
+
+/* semantic routines for output statements */
+void output_set_file (char *name);
+void output_pages (int first, int last);