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-rw-r--r--semantics.c282
1 files changed, 144 insertions, 138 deletions
diff --git a/semantics.c b/semantics.c
index f404fb5..4c67955 100644
--- a/semantics.c
+++ b/semantics.c
@@ -9,6 +9,13 @@
#define ERROR(ast) print_error(err_buff, NULL, (ast)->loc.row, (ast)->loc.col, 0)
#define WARNING(ast) print_error(err_buff, NULL, (ast)->loc.row, (ast)->loc.col, 1)
+extern void print_error(char *, char *, int, int, int);
+extern char *load_line(int);
+static char err_buff[MAX_ERROR_BUFF];
+static CType_t basic_type_int;
+static CType_t basic_type_char;
+static CType_t basic_type_void;
+
#ifdef CIBIC_DEBUG
CTable_t ctable_create(Hashfunc_t hfunc, Printfunc_t pfunc) {
CTable_t ct = NEW(CTable);
@@ -38,13 +45,6 @@ void ctable_destory(CTable_t ct) {
}
}
-extern void print_error(char *, char *, int, int, int);
-extern char *load_line(int);
-static char err_buff[MAX_ERROR_BUFF];
-static CType_t basic_type_int;
-static CType_t basic_type_char;
-static CType_t basic_type_void;
-
void *ctable_lookup(CTable_t ct, const char *key) {
unsigned int hv = ct->hfunc(key) % MAX_TABLE_SIZE;
CTNode *p = ct->head[hv];
@@ -249,62 +249,66 @@ void cvar_print(CVar_t cv) {
void ctype_print(CType_t ct) {
switch (ct->type)
{
- case CINT: fprintf(stderr, "[int]"); break;
- case CCHAR: fprintf(stderr, "[char]"); break;
- case CVOID: fprintf(stderr, "[void]"); break;
- case CSTRUCT: case CUNION:
- {
- CTable_t f = ct->rec.fields;
- int i;
- CTNode *fn;
- fprintf(stderr, "[%s@%lx:(name:%s|fields:",
- ct->type == CSTRUCT ? "struct" : "union",
- (size_t)ct,
- ct->name);
- if (f)
+ case CINT:
+ fprintf(stderr, "[int]"); break;
+ case CCHAR:
+ fprintf(stderr, "[char]"); break;
+ case CVOID:
+ fprintf(stderr, "[void]"); break;
+ case CSTRUCT:
+ case CUNION:
+ {
+ CTable_t f = ct->rec.fields;
+ int i;
+ CTNode *fn;
+ fprintf(stderr, "[%s@%lx:(name:%s|fields:",
+ ct->type == CSTRUCT ? "struct" : "union",
+ (size_t)ct,
+ ct->name);
+ if (f)
+ {
+ int first = 1;
+ for (i = 0; i < MAX_TABLE_SIZE; i++)
+ for (fn = f->head[i]; fn; fn = fn->next)
{
- int first = 1;
- for (i = 0; i < MAX_TABLE_SIZE; i++)
- for (fn = f->head[i]; fn; fn = fn->next)
- {
- fprintf(stderr, "%s", first ? (first = 0, "") : ",");
- cvar_print((CVar_t)fn->val);
- }
+ fprintf(stderr, "%s", first ? (first = 0, "") : ",");
+ cvar_print((CVar_t)fn->val);
}
- fprintf(stderr, ")]");
- }
- break;
+ }
+ fprintf(stderr, ")]");
+ }
+ break;
case CARR:
- {
- fprintf(stderr, "[arr:(%d)]->", ct->rec.arr.len);
- ctype_print(ct->rec.arr.elem);
- }
- break;
+ {
+ fprintf(stderr, "[arr:(%d)]->", ct->rec.arr.len);
+ ctype_print(ct->rec.arr.elem);
+ }
+ break;
case CPTR:
- {
- fprintf(stderr, "[ptr]->");
- ctype_print(ct->rec.ref);
- }
- break;
+ {
+ fprintf(stderr, "[ptr]->");
+ ctype_print(ct->rec.ref);
+ }
+ break;
case CFUNC:
- {
- CVar_t p;
- fprintf(stderr, "[func:(name:%s|params:", ct->name);
- for (p = ct->rec.func.params; p; p = p->next)
- {
- cvar_print(p);
- if (p->next) fprintf(stderr, ",");
- }
- fprintf(stderr, "|local:");
- for (p = ct->rec.func.local; p; p = p->next)
- {
- cvar_print(p);
- if (p->next) fprintf(stderr, ",");
- }
- fprintf(stderr, ")]->");
- ctype_print(ct->rec.func.ret);
- }
- break;
+ {
+ CVar_t p;
+ fprintf(stderr, "[func:(name:%s|params:", ct->name);
+ for (p = ct->rec.func.params; p; p = p->next)
+ {
+ cvar_print(p);
+ if (p->next) fprintf(stderr, ",");
+ }
+ fprintf(stderr, "|local:");
+ for (p = ct->rec.func.local; p; p = p->next)
+ {
+ cvar_print(p);
+ if (p->next) fprintf(stderr, ",");
+ }
+ fprintf(stderr, ")]->");
+ ctype_print(ct->rec.func.ret);
+ }
+ break;
}
}
@@ -408,25 +412,28 @@ CType_t semantics_type_spec(CNode *p, CScope_t scope) {
CType_t type;
switch (p->rec.subtype)
{
- case KW_VOID: type = ctype_create("", CVOID, p); break;
- case KW_CHAR: type = ctype_create("", CCHAR, p); break;
- case KW_INT: type = ctype_create("", CINT, p); break;
+ case KW_VOID:
+ type = ctype_create("", CVOID, p); break;
+ case KW_CHAR:
+ type = ctype_create("", CCHAR, p); break;
+ case KW_INT:
+ type = ctype_create("", CINT, p); break;
case KW_STRUCT: case KW_UNION:
- {
- CNode *id = p->chd,
- *fields = p->chd->next;
- type = ctype_create(id->type == NOP ? "" : id->rec.strval,
- p->rec.subtype == KW_STRUCT ? CSTRUCT : CUNION,
- p);
- if (fields->type == NOP)
- type->rec.fields = NULL; /* incomplete type */
- else
- type->rec.fields = semantics_fields(fields, scope);
-
- if (id->type != NOP)
- type = struct_type_merge(type, scope);
- }
- break;
+ {
+ CNode *id = p->chd,
+ *fields = p->chd->next;
+ type = ctype_create(id->type == NOP ? "" : id->rec.strval,
+ p->rec.subtype == KW_STRUCT ? CSTRUCT : CUNION,
+ p);
+ if (fields->type == NOP)
+ type->rec.fields = NULL; /* incomplete type */
+ else
+ type->rec.fields = semantics_fields(fields, scope);
+
+ if (id->type != NOP)
+ type = struct_type_merge(type, scope);
+ }
+ break;
default: assert(0);
}
return type;
@@ -448,8 +455,8 @@ CVar_t semantics_declr(CNode *, CType_t, CScope_t);
CVar_t semantics_p_decl(CNode *p, CScope_t scope) {
CHECK_TYPE(p, PLAIN_DECL);
CVar_t var = semantics_declr(p->chd->next,
- semantics_type_spec(p->chd, scope),
- scope);
+ semantics_type_spec(p->chd, scope),
+ scope);
if (!type_is_complete(var->type))
{
sprintf(err_buff, "parameter '%s' has incomplete type", var->name);
@@ -614,8 +621,8 @@ CTable_t semantics_fields(CNode *p, CScope_t scope) {
for (; declr; declr = declr->next)
{
CVar_t var = semantics_declr(declr,
- semantics_type_spec(p->chd, scope),
- scope);
+ semantics_type_spec(p->chd, scope),
+ scope);
/* incomplete type checking */
if (!type_is_complete(var->type))
{
@@ -651,7 +658,7 @@ CVar_t semantics_decl(CNode *p, CScope_t scope) {
{
/* TODO: initializer checking */
CVar_t var = semantics_declr(p->chd, type, scope);
- if (!type_is_complete(var->type))
+ if (scope->lvl && !type_is_complete(var->type))
{
sprintf(err_buff, "storage size of '%s' isn’t known", var->name);
ERROR(var->ast);
@@ -673,11 +680,11 @@ CVar_t semantics_decl(CNode *p, CScope_t scope) {
#define NOT_IGNORE_VOID(et, ast) \
if (et->type == CVOID) \
- do \
- { \
- sprintf(err_buff, "void value not ignored as it ought to be"); \
- ERROR(ast); \
- } while (0)
+do \
+{ \
+ sprintf(err_buff, "void value not ignored as it ought to be"); \
+ ERROR(ast); \
+} while (0)
#define INCOMP_TYPE(ast) \
do { \
@@ -730,7 +737,6 @@ void exp_check_aseq_(CType_t lhs, CType_t rhs, CNode *ast) {
}
}
-
ExpType exp_check_aseq(ExpType lhs, ExpType rhs, CNode *ast) {
exp_check_aseq_(lhs.type, rhs.type, ast);
return lhs;
@@ -852,7 +858,7 @@ ExpType exp_check_ref(ExpType op1, CNode *ast) {
return res;
}
-ExpType exp_check_sizeof(ExpType op1, CNode *ast) {
+ExpType exp_check_sizeof(ExpType op1) {
op1.lval = 0;
op1.type = basic_type_int;
return op1;
@@ -1103,78 +1109,78 @@ ExpType semantics_exp(CNode *p, CScope_t scope) {
case ASS_AND:
case ASS_XOR:
case ASS_OR:
- res = exp_check_ass(op1, op2, p);
- break;
+ res = exp_check_ass(op1, op2, p);
+ break;
case OPT_OR:
case OPT_AND:
- res = exp_check_logical(op1, op2, p);
- break;
+ res = exp_check_logical(op1, op2, p);
+ break;
case OPT_SHL:
case OPT_SHR:
case '|':
case '^':
- res = exp_check_bitwise(op1, op2, p);
- break;
+ res = exp_check_bitwise(op1, op2, p);
+ break;
case OPT_EQ:
case OPT_NE:
case '<':
case '>' :
case OPT_LE:
case OPT_GE:
- res = exp_check_equality(op1, op2, p);
- break;
+ res = exp_check_equality(op1, op2, p);
+ break;
case '/': case '%':
- res = exp_check_arith(op1, op2, p);
- break;
+ res = exp_check_arith(op1, op2, p);
+ break;
case EXP_CAST:
- res.type = semantics_type_name(p->chd, scope);
- res.lval = 0;
- break;
+ res.type = semantics_type_name(p->chd, scope);
+ res.lval = 0;
+ break;
case '&':
- if (p->chd->next)
- res = exp_check_bitwise(op1, op2, p);
- else
- res = exp_check_ref(op1, p);
- break;
+ if (p->chd->next)
+ res = exp_check_bitwise(op1, op2, p);
+ else
+ res = exp_check_ref(op1, p);
+ break;
case '*':
- if (p->chd->next)
- res = exp_check_arith(op1, op2, p);
- else
- res = exp_check_deref(op1, p);
- break;
+ if (p->chd->next)
+ res = exp_check_arith(op1, op2, p);
+ else
+ res = exp_check_deref(op1, p);
+ break;
case '+':
- if (p->chd->next)
- res = exp_check_add(op1, op2, p, 0);
- else
- {
- res = op1;
- res.lval = 0;
- }
- break;
+ if (p->chd->next)
+ res = exp_check_add(op1, op2, p, 0);
+ else
+ {
+ res = op1;
+ res.lval = 0;
+ }
+ break;
case '-':
- if (p->chd->next)
- res = exp_check_add(op1, op2, p, 1);
- else
- {
- res = op1;
- res.lval = 0;
- }
- break;
+ if (p->chd->next)
+ res = exp_check_add(op1, op2, p, 1);
+ else
+ {
+ res = op1;
+ res.lval = 0;
+ }
+ break;
case '~':
- res = exp_check_int(op1, p);
- break;
+ res = exp_check_int(op1, p);
+ break;
case '!':
- res = exp_check_scalar(op1, p);
- break;
+ res = exp_check_scalar(op1, p);
+ break;
case OPT_INC: case OPT_DEC:
- res = exp_check_inc(op1, p);
- break;
+ res = exp_check_inc(op1, p);
+ break;
case KW_SIZEOF:
- res = exp_check_sizeof(op1, p);
- break;
+ res = exp_check_sizeof(op1);
+ break;
case EXP_POSTFIX:
- res = exp_check_postfix(p, scope);
- break;
+ res = exp_check_postfix(p, scope);
+ break;
default: assert(0);
}
}
@@ -1348,10 +1354,10 @@ CVar_t semantics_func(CNode *p, CScope_t scope) {
}
scope->func = func;
- cscope_enter(scope); /* enter into function local scope */
func->rec.func.params = semantics_params(chd, scope); /* check params */
if (cscope_push_var(scope, res))
old = res;
+ cscope_enter(scope); /* enter into function local scope */
{
CVar_t p;
for (p = func->rec.func.params; p; p = p->next)
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