From dea8fd171acb54b6d9685422d5e391fb55074008 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Sun, 19 Oct 2025 08:09:09 +0200
Subject: Organize source files into directories

---
 c/c.h | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 c/c.h

(limited to 'c/c.h')

diff --git a/c/c.h b/c/c.h
new file mode 100644
index 0000000..6a26455
--- /dev/null
+++ b/c/c.h
@@ -0,0 +1,89 @@
+#include "../common.h"
+
+/*************/
+/* EXPR TREE */
+/*************/
+
+enum exprkind {
+   EXXX, ENUMLIT, ESTRLIT, ESYM, EINIT, EGETF, ECALL, ECOND,
+   /* unary */
+   EPLUS, ENEG, ECOMPL, ELOGNOT, EDEREF, EADDROF, ECAST,
+   EPREINC, EPOSTINC, EPREDEC, EPOSTDEC,
+   /* binary */
+   EADD, ESUB, EMUL, EDIV, EREM, EBAND, EBIOR, EXOR, ESHL, ESHR,
+   ELOGAND, ELOGIOR,
+   EEQU, ENEQ, ELTH, EGTH, ELTE, EGTE,
+   ESET, ESETADD, ESETSUB, ESETMUL, ESETDIV, ESETREM, ESETAND, ESETIOR, ESETXOR, ESETSHL, ESETSHR,
+   ESEQ,
+};
+#define isunop(t) in_range(t, EPLUS, EPOSTDEC)
+#define isbinop(t) in_range(t, EADD, ESEQ)
+#define isassign(t) in_range(t, ESET, ESETSHR)
+#define assigntobinop(t) ((t) - ESETADD + EADD)
+
+struct expr {
+   uchar t;
+   uchar qual;
+   ushort narg; /* ECALL */
+   union type ty;
+   struct span span;
+   union {
+     struct {
+        struct expr *sub;
+        struct exgetfld {
+           ushort off;
+           uchar bitsiz, bitoff;
+        } fld; /* EGETF */
+     };
+     uvlong u; vlong i; double f; /* ENUMLIT */
+     struct bytes s; /* ESTRLIT */
+     struct decl *sym; /* ESYM */
+     struct init *init; /* EINIT */
+   };
+};
+
+struct init {
+   struct bitset zero[1]; /* bytes to zero out up to 64 */
+   struct initval {
+      struct initval *next;
+      uint off;
+      uchar bitoff, bitsiz;
+      struct expr ex;
+   } *vals, **tail;
+};
+
+enum storageclass {
+   SCNONE,
+   SCTYPEDEF = 1<<0,
+   SCEXTERN = 1<<1,
+   SCSTATIC = 1<<2,
+   SCTHREADLOCAL = 1<<3,
+   SCAUTO = 1<<4,
+   SCREGISTER = 1<<5,
+};
+
+struct decl {
+   union type ty;
+   uchar scls;
+   uchar qual : 2;
+   uchar isenum : 1;
+   uchar isdef : 1;
+   struct span span;
+   const char *name;
+   union {
+      struct { ushort align; int id; };
+      vlong value;
+   };
+};
+
+enum evalmode {
+   EVNONE,
+   EVINTCONST,
+   EVARITH,
+   EVSTATICINI,
+   EVFOLD,
+};
+
+bool eval(struct expr *, enum evalmode);
+
+/* vim:set ts=3 sw=3 expandtab: */
-- 
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