Splint annotations.

CVS patchset: 7182
CVS date: 2004/03/23 05:09:13

1 files changed, 61 insertions, 21 deletions

diff --git a/lua/lcode.c b/lua/lcode.c
index 033e8ecf3..7047adf36 100644
--- a/lua/lcode.c
+++ b/lua/lcode.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 1.1 2004/03/16 21:58:30 niemeyer Exp $
+** $Id: lcode.c,v 1.2 2004/03/23 05:09:14 jbj Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -51,13 +51,17 @@ int luaK_jump (FuncState *fs) {
 }
 
 
-static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C) {
+static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C)
+	/*@modifies fs @*/
+{
   luaK_codeABC(fs, op, A, B, C);
   return luaK_jump(fs);
 }
 
 
-static void luaK_fixjump (FuncState *fs, int pc, int dest) {
+static void luaK_fixjump (FuncState *fs, int pc, int dest)
+	/*@modifies fs @*/
+{
   Instruction *jmp = &fs->f->code[pc];
   int offset = dest-(pc+1);
   lua_assert(dest != NO_JUMP);
@@ -77,7 +81,9 @@ int luaK_getlabel (FuncState *fs) {
 }
 
 
-static int luaK_getjump (FuncState *fs, int pc) {
+static int luaK_getjump (FuncState *fs, int pc)
+	/*@*/
+{
   int offset = GETARG_sBx(fs->f->code[pc]);
   if (offset == NO_JUMP)  /* point to itself represents end of list */
     return NO_JUMP;  /* end of list */
@@ -86,7 +92,9 @@ static int luaK_getjump (FuncState *fs, int pc) {
 }
 
 
-static Instruction *getjumpcontrol (FuncState *fs, int pc) {
+static Instruction *getjumpcontrol (FuncState *fs, int pc)
+	/*@*/
+{
   Instruction *pi = &fs->f->code[pc];
   if (pc >= 1 && testOpMode(GET_OPCODE(*(pi-1)), OpModeT))
     return pi-1;
@@ -99,7 +107,9 @@ static Instruction *getjumpcontrol (FuncState *fs, int pc) {
 ** check whether list has any jump that do not produce a value
 ** (or produce an inverted value)
 */
-static int need_value (FuncState *fs, int list, int cond) {
+static int need_value (FuncState *fs, int list, int cond)
+	/*@*/
+{
   for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {
     Instruction i = *getjumpcontrol(fs, list);
     if (GET_OPCODE(i) != OP_TEST || GETARG_C(i) != cond) return 1;
@@ -108,14 +118,18 @@ static int need_value (FuncState *fs, int list, int cond) {
 }
 
 
-static void patchtestreg (Instruction *i, int reg) {
+static void patchtestreg (Instruction *i, int reg)
+	/*@modifies *i @*/
+{
   if (reg == NO_REG) reg = GETARG_B(*i);
   SETARG_A(*i, reg);
 }
 
 
 static void luaK_patchlistaux (FuncState *fs, int list,
-          int ttarget, int treg, int ftarget, int freg, int dtarget) {
+          int ttarget, int treg, int ftarget, int freg, int dtarget)
+	/*@modifies fs @*/
+{
   while (list != NO_JUMP) {
     int next = luaK_getjump(fs, list);
     Instruction *i = getjumpcontrol(fs, list);
@@ -140,7 +154,9 @@ static void luaK_patchlistaux (FuncState *fs, int list,
 }
 
 
-static void luaK_dischargejpc (FuncState *fs) {
+static void luaK_dischargejpc (FuncState *fs)
+	/*@modifies fs @*/
+{
   luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc, NO_REG, fs->pc);
   fs->jpc = NO_JUMP;
 }
@@ -192,7 +208,9 @@ void luaK_reserveregs (FuncState *fs, int n) {
 }
 
 
-static void freereg (FuncState *fs, int reg) {
+static void freereg (FuncState *fs, int reg)
+	/*@modifies fs @*/
+{
   if (reg >= fs->nactvar && reg < MAXSTACK) {
     fs->freereg--;
     lua_assert(reg == fs->freereg);
@@ -200,13 +218,17 @@ static void freereg (FuncState *fs, int reg) {
 }
 
 
-static void freeexp (FuncState *fs, expdesc *e) {
+static void freeexp (FuncState *fs, expdesc *e)
+	/*@modifies fs @*/
+{
   if (e->k == VNONRELOC)
     freereg(fs, e->info);
 }
 
 
-static int addk (FuncState *fs, TObject *k, TObject *v) {
+static int addk (FuncState *fs, TObject *k, TObject *v)
+	/*@modifies fs @*/
+{
   const TObject *idx = luaH_get(fs->h, k);
   if (ttisnumber(idx)) {
     lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v));
@@ -237,7 +259,9 @@ int luaK_numberK (FuncState *fs, lua_Number r) {
 }
 
 
-static int nil_constant (FuncState *fs) {
+static int nil_constant (FuncState *fs)
+	/*@modifies fs @*/
+{
   TObject k, v;
   setnilvalue(&v);
   sethvalue(&k, fs->h);  /* cannot use nil as key; instead use table itself */
@@ -288,13 +312,17 @@ void luaK_dischargevars (FuncState *fs, expdesc *e) {
 }
 
 
-static int code_label (FuncState *fs, int A, int b, int jump) {
+static int code_label (FuncState *fs, int A, int b, int jump)
+	/*@modifies fs @*/
+{
   luaK_getlabel(fs);  /* those instructions may be jump targets */
   return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
 }
 
 
-static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
+static void discharge2reg (FuncState *fs, expdesc *e, int reg)
+	/*@modifies fs, e @*/
+{
   luaK_dischargevars(fs, e);
   switch (e->k) {
     case VNIL: {
@@ -329,7 +357,9 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
 }
 
 
-static void discharge2anyreg (FuncState *fs, expdesc *e) {
+static void discharge2anyreg (FuncState *fs, expdesc *e)
+	/*@modifies fs, e @*/
+{
   if (e->k != VNONRELOC) {
     luaK_reserveregs(fs, 1);
     discharge2reg(fs, e, fs->freereg-1);
@@ -337,7 +367,9 @@ static void discharge2anyreg (FuncState *fs, expdesc *e) {
 }
 
 
-static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) {
+static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg)
+	/*@modifies fs, e @*/
+{
   discharge2reg(fs, e, reg);
   if (e->k == VJMP)
     luaK_concat(fs, &e->t, e->info);  /* put this jump in `t' list */
@@ -460,7 +492,9 @@ void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
 }
 
 
-static void invertjump (FuncState *fs, expdesc *e) {
+static void invertjump (FuncState *fs, expdesc *e)
+	/*@*/
+{
   Instruction *pc = getjumpcontrol(fs, e->info);
   lua_assert(testOpMode(GET_OPCODE(*pc), OpModeT) &&
              GET_OPCODE(*pc) != OP_TEST);
@@ -468,7 +502,9 @@ static void invertjump (FuncState *fs, expdesc *e) {
 }
 
 
-static int jumponcond (FuncState *fs, expdesc *e, int cond) {
+static int jumponcond (FuncState *fs, expdesc *e, int cond)
+	/*@modifies fs, e @*/
+{
   if (e->k == VRELOCABLE) {
     Instruction ie = getcode(fs, e);
     if (GET_OPCODE(ie) == OP_NOT) {
@@ -534,7 +570,9 @@ void luaK_goiffalse (FuncState *fs, expdesc *e) {
 }
 
 
-static void codenot (FuncState *fs, expdesc *e) {
+static void codenot (FuncState *fs, expdesc *e)
+	/*@modifies fs, e @*/
+{
   luaK_dischargevars(fs, e);
   switch (e->k) {
     case VNIL: case VFALSE: {
@@ -617,7 +655,9 @@ void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
 
 
 static void codebinop (FuncState *fs, expdesc *res, BinOpr op,
-                       int o1, int o2) {
+                       int o1, int o2)
+	/*@modifies fs, res @*/
+{
   if (op <= OPR_POW) {  /* arithmetic operator? */
     OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD);  /* ORDER OP */
     res->info = luaK_codeABC(fs, opc, 0, o1, o2);