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cc_types.c
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cc_types.c
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/* Copyright (C) 2016 Jeremiah Orians
* Copyright (C) 2020 deesix <deesix@tuta.io>
* This file is part of M2-Planet.
*
* M2-Planet is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* M2-Planet is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with M2-Planet. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cc.h"
/* Imported functions */
int strtoint(char *a);
void line_error(void);
void require(int bool, char* error);
/* enable easy primitive extension */
struct type* add_primitive(struct type* a)
{
if(NULL == prim_types) return a;
struct type* i = prim_types;
while(NULL != i->next)
{
i = i->next;
}
i->next = a;
return prim_types;
}
/* enable easy primitive creation */
struct type* new_primitive(char* name0, char* name1, char* name2, int size, int sign)
{
/* Create type** */
struct type* a = calloc(1, sizeof(struct type));
require(NULL != a, "Exhausted memory while declaring new primitive**\n");
a->name = name2;
a->size = register_size;
a->indirect = a;
a->is_signed = sign;
/* Create type* */
struct type* b = calloc(1, sizeof(struct type));
require(NULL != b, "Exhausted memory while declaring new primitive*\n");
b->name = name1;
b->size = register_size;
b->is_signed = sign;
b->indirect = a;
a->type = b;
struct type* r = calloc(1, sizeof(struct type));
require(NULL != r, "Exhausted memory while declaring new primitive\n");
r->name = name0;
r->size = size;
r->is_signed = sign;
r->indirect = b;
r->type = r;
b->type = r;
return r;
}
/* Initialize default types */
void initialize_types(void)
{
if(AMD64 == Architecture || AARCH64 == Architecture || RISCV64 == Architecture) register_size = 8;
else register_size = 4;
/* Define void */
struct type* hold = new_primitive("void", "void*", "void**", register_size, FALSE);
prim_types = add_primitive(hold);
/* Define unsigned LONG */
hold = new_primitive("SCM","SCM*", "SCM**", register_size, FALSE);
prim_types = add_primitive(hold);
/* Define LONG */
hold = new_primitive("long", "long*", "long**", register_size, TRUE);
prim_types = add_primitive(hold);
/* Define UNSIGNED */
hold = new_primitive("unsigned", "unsigned*", "unsigned**", register_size, FALSE);
prim_types = add_primitive(hold);
/* Define int */
integer = new_primitive("int", "int*", "int**", register_size, TRUE);
prim_types = add_primitive(integer);
/* Define uint32_t */
hold = new_primitive("uint32_t", "uint32_t*", "uint32_t**", 4, FALSE);
prim_types = add_primitive(hold);
/* Define int32_t */
hold = new_primitive("int32_t", "int32_t*", "int32_t**", 4, TRUE);
prim_types = add_primitive(hold);
/* Define uint16_t */
hold = new_primitive("uint16_t", "uint16_t*", "uint16_t**", 2, FALSE);
prim_types = add_primitive(hold);
/* Define int16_t */
hold = new_primitive("int16_t", "int16_t*", "int16_t**", 2, TRUE);
prim_types = add_primitive(hold);
/* Define uint8_t */
hold = new_primitive("uint8_t", "uint8_t*", "uint8_t**", 1, FALSE);
prim_types = add_primitive(hold);
/* Define int8_t */
hold = new_primitive("int8_t", "int8_t*", "int8_t**", 1, TRUE);
prim_types = add_primitive(hold);
/* Define char */
hold = new_primitive("char", "char*", "char**", 1, TRUE);
prim_types = add_primitive(hold);
/* Define FUNCTION */
hold = new_primitive("FUNCTION", "FUNCTION*", "FUNCTION**", register_size, FALSE);
prim_types = add_primitive(hold);
if(BOOTSTRAP_MODE)
{
/* Define FILE */
hold = new_primitive("FILE", "FILE*", "FILE**", register_size, TRUE);
prim_types = add_primitive(hold);
/* Primitives mes.c wanted */
hold = new_primitive("size_t", "size_t*", "size_t**", register_size, FALSE);
prim_types = add_primitive(hold);
hold = new_primitive("ssize_t", "ssize_t*", "ssize_t**", register_size, FALSE);
prim_types = add_primitive(hold);
}
global_types = prim_types;
}
struct type* lookup_type(char* s, struct type* start)
{
struct type* i;
for(i = start; NULL != i; i = i->next)
{
if(match(i->name, s))
{
return i;
}
}
return NULL;
}
struct type* lookup_member(struct type* parent, char* name)
{
struct type* i;
require(NULL != parent, "Not a valid struct type\n");
for(i = parent->members; NULL != i; i = i->members)
{
if(match(i->name, name)) return i;
}
fputs("ERROR in lookup_member ", stderr);
fputs(parent->name, stderr);
fputs("->", stderr);
fputs(global_token->s, stderr);
fputs(" does not exist\n", stderr);
line_error();
fputs("\n", stderr);
exit(EXIT_FAILURE);
}
struct type* type_name(void);
void require_match(char* message, char* required);
int member_size;
struct type* build_member(struct type* last, int offset)
{
struct type* i = calloc(1, sizeof(struct type));
require(NULL != i, "Exhausted memory while building a struct member\n");
i->members = last;
i->offset = offset;
struct type* member_type = type_name();
require(NULL != member_type, "struct member type can not be invalid\n");
i->type = member_type;
i->name = global_token->s;
global_token = global_token->next;
require(NULL != global_token, "struct member can not be EOF terminated\n");
/* Check to see if array */
if(match( "[", global_token->s))
{
global_token = global_token->next;
require(NULL != global_token, "struct member arrays can not be EOF sized\n");
i->size = member_type->type->size * strtoint(global_token->s);
if(0 == i->size)
{
fputs("Struct only supports [num] form\n", stderr);
exit(EXIT_FAILURE);
}
global_token = global_token->next;
require_match("Struct only supports [num] form\n", "]");
}
else
{
i->size = member_type->size;
}
member_size = i->size;
return i;
}
struct type* build_union(struct type* last, int offset)
{
int size = 0;
global_token = global_token->next;
require_match("ERROR in build_union\nMissing {\n", "{");
while('}' != global_token->s[0])
{
last = build_member(last, offset);
if(member_size > size)
{
size = member_size;
}
require_match("ERROR in build_union\nMissing ;\n", ";");
require(NULL != global_token, "Unterminated union\n");
}
member_size = size;
global_token = global_token->next;
return last;
}
void create_struct(void)
{
int offset = 0;
member_size = 0;
struct type* head = calloc(1, sizeof(struct type));
require(NULL != head, "Exhausted memory while creating a struct\n");
struct type* i = calloc(1, sizeof(struct type));
require(NULL != i, "Exhausted memory while creating a struct indirection\n");
struct type* ii = calloc(1, sizeof(struct type));
require(NULL != ii, "Exhausted memory while creating a struct double indirection\n");
head->name = global_token->s;
head->type = head;
head->indirect = i;
head->next = global_types;
i->name = global_token->s;
i->type = head;
i->indirect = ii;
i->size = register_size;
ii->name = global_token->s;
ii->type = i;
ii->indirect = ii;
ii->size = register_size;
global_types = head;
global_token = global_token->next;
require_match("ERROR in create_struct\n Missing {\n", "{");
struct type* last = NULL;
require(NULL != global_token, "Incomplete struct definition at end of file\n");
while('}' != global_token->s[0])
{
if(match(global_token->s, "union"))
{
last = build_union(last, offset);
}
else
{
last = build_member(last, offset);
}
offset = offset + member_size;
require_match("ERROR in create_struct\n Missing ;\n", ";");
require(NULL != global_token, "Unterminated struct\n");
}
global_token = global_token->next;
require_match("ERROR in create_struct\n Missing ;\n", ";");
head->size = offset;
head->members = last;
i->members = last;
}
struct type* type_name(void)
{
struct type* ret;
require(NULL != global_token, "Received EOF instead of type name\n");
if(match("extern", global_token->s))
{
global_token = global_token->next;
require(NULL != global_token, "unfinished type definition in extern\n");
}
if(match("struct", global_token->s))
{
global_token = global_token->next;
require(NULL != global_token, "structs can not have a EOF type name\n");
ret = lookup_type(global_token->s, global_types);
if(NULL == ret)
{
create_struct();
return NULL;
}
}
else
{
ret = lookup_type(global_token->s, global_types);
if(NULL == ret)
{
fputs("Unknown type ", stderr);
fputs(global_token->s, stderr);
fputs("\n", stderr);
line_error();
fputs("\n", stderr);
exit(EXIT_FAILURE);
}
}
global_token = global_token->next;
require(NULL != global_token, "unfinished type definition\n");
if(match("const", global_token->s))
{
global_token = global_token->next;
require(NULL != global_token, "unfinished type definition in const\n");
}
while(global_token->s[0] == '*')
{
ret = ret->indirect;
global_token = global_token->next;
require(NULL != global_token, "unfinished type definition in indirection\n");
}
return ret;
}
struct type* mirror_type(struct type* source, char* name)
{
struct type* head = calloc(1, sizeof(struct type));
require(NULL != head, "Exhausted memory while creating a struct\n");
struct type* i = calloc(1, sizeof(struct type));
require(NULL != i, "Exhausted memory while creating a struct indirection\n");
head->name = name;
i->name = name;
head->size = source->size;
i->size = source->indirect->size;
head->offset = source->offset;
i->offset = source->indirect->offset;
head->is_signed = source->is_signed;
i->is_signed = source->indirect->is_signed;
head->indirect = i;
i->indirect = head;
head->members = source->members;
i->members = source->indirect->members;
head->type = head;
i->type = i;
return head;
}