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gen_macros.c
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#include <assert.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <memory.h>
#include <string.h>
#include <ctype.h>
#include "c2ada.h"
#define INIT register char* sp = instring;
#include <regex.h>
#define step(string, expbuf) step_impl(string, &expbuf)
char *loc1, *loc2;
/* used by grok_macro_function */
static char* ident = "[a-zA-Z_][a-zA-Z0-9_]*";
static regex_t ident_buf;
static char* in_parens = "(.*)";
static regex_t in_parens_buf;
static char* next_arg = "[,)]";
static regex_t next_arg_buf;
/* used by grok_coercion */
static char* int_name = "^[ ]*int[ ]*";
static regex_t int_buf;
static char* const_name = "^[ ]*const[ ]*";
static regex_t const_buf;
static char* char_name = "^[ ]*char[ ]*";
static regex_t char_buf;
static char* empty_params_name = "([ ]*)";
static regex_t empty_params_buf;
static char* float_name = "^[ ]*float[ ]*";
static regex_t float_buf;
static char* double_name = "^[ ]*double[ ]*";
static regex_t double_buf;
static char* short_name = "^[ ]*short[ ]*";
static regex_t short_buf;
static char* long_name = "^[ ]*long[ ]*";
static regex_t long_buf;
static char* unsigned_name = "^[ ]*unsigned[ ]*";
static regex_t unsigned_buf;
static char* signed_name = "^[ ]*signed[ ]*";
static regex_t signed_buf;
static char* void_name = "^[ ]*void[ ]*";
static regex_t void_buf;
static char* star_name = "^[ ]*\\*[ ]*";
static regex_t star_buf;
static char* struct_name = "^struct[ ]*";
static regex_t struct_buf;
static char* union_name = "^struct\\>";
static regex_t union_buf;
macro_t* unit_macros[MAX_UNIQ_FNAMES];
static macro_t* unknown_macro_list = NULL;
static const char* no_empty_params(const char*);
static macro_function_t* grok_macro_function(char* rhs);
struct typeinfo_t* grok_coercion(char* type_name);
static int match_param_name(char* formal_name, char* body_name);
extern int auto_package;
extern int ada_version;
static void macro_enq(macro_t* m)
{
macro_t *t, *last;
unit_n unit;
assert(m != NULL);
unit = pos_unit(m->macro_definition);
assert(unit < MAX_UNIQ_FNAMES);
for(last = NULL, t = unit_macros[unit]; t; t = t->macro_next)
{
last = t;
}
if(last)
{
last->macro_next = m;
}
else
{
assert(unit_macros[unit] == NULL);
unit_macros[unit] = m;
}
}
static void dump_macros(macro_t* list, int max)
{
macro_t* m;
int i = 0;
fprintf(stderr, "----------- macro dump --------\n");
for(m = list; m; m = m->macro_next)
{
fprintf(stderr, "name <%s>, ada_name <%s>, body <%s>, ", m->macro_name,
m->macro_ada_name, m->macro_body);
fprintf(stderr, "body_len %d, params %d\n", m->macro_body_len, m->macro_params);
if(i++ >= max)
break;
}
fprintf(stderr, "----------- end macro dump --------\n");
}
void gen_macro_warnings()
{
extern int macro_warnings;
macro_t* m;
if(macro_warnings)
{
for(m = unknown_macro_list; m; m = m->macro_next)
{
fprintf(stderr, "warning: macro %s untranslated, %s line %d\n", m->macro_name,
file_name(m->macro_definition), (int)line_number(m->macro_definition));
}
}
unknown_macro_list = NULL;
}
static int could_be_ada_ident(char* s)
{
if(!s || !is_alpha((int)s[0]))
return 0;
while(is_alpha_numeric((int)*s++))
{
}
return is_alpha_numeric((int)s[-2]);
}
static void add_to_unknown_list(macro_t* unknown)
{
macro_t* m;
if(unknown_macro_list == NULL)
{
unknown_macro_list = unknown;
}
else
{
for(m = unknown_macro_list; m->macro_next != NULL; m = m->macro_next)
if(m == unknown)
return;
m->macro_next = unknown;
}
unknown->macro_next = NULL;
}
static void gen_const_char(char *name, char* val)
{
char* buf;
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
putf(": constant %s", ada_version < 1995 ? "Character" : "Char");
put_string(" := ");
buf = char_to_string(val[0], true);
if((strlen(buf) == 1) || !strcmp(buf, "\"\""))
{
put_char('\'');
put_string(buf);
put_char('\'');
}
else
{
put_string(buf);
}
put_char(';');
}
static void gen_const_int(char* name, char* tname, host_int_t val, int base)
{
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
put_string(": constant ");
if(tname != NULL)
put_string(tname);
put_string(" := ");
print_value(val, base);
put_char(';');
}
static void gen_const_synonym(char* name, char* tname, char* value)
{
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
put_string(": constant ");
if(tname != NULL)
put_string(tname);
put_string(" := ");
put_string(value);
put_string(";");
}
static void gen_const_ref(char* name, char* tname, host_int_t val)
{
/* This routine is only called to initialize null pointers */
assert(val == 0);
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
put_string(": constant ");
if(tname != NULL)
put_string(tname);
put_string(" := null;");
}
static void gen_const_float(char* name, char* val)
{
char c, *p;
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
put_string(": constant := ");
/* Ada floats must be 0.1, can't be .1 */
for(p = val; *p != '\0'; p++)
{
c = *p;
if((c == '.') && ((p == val) || !isdigit(p[-1])))
put_char('0');
put_char(c);
if((c == '.') && (!isdigit(p[1])))
put_char('0');
}
put_char(';');
}
static void gen_const_rename(char* name, int unit, char* typ)
{
char* p;
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
put_string(": constant");
put_string(typ);
put_string(" := ");
p = unit_name(unit);
assert(p != NULL);
put_string(p);
put_char('.');
put_string(name);
put_char(';');
}
static void gen_const_bool(char* name)
{
indent_to(4);
put_string(name);
MAX_INDENT(max_const_name_indent);
indent_to(max_const_name_indent);
put_string(": constant Boolean := True;");
}
static void gen_comment(macro_t* m)
{
if(m->eol_comment)
{
print_comment(m->eol_comment);
}
else
{
print_position(m->macro_definition);
}
}
#if 0
parse_macro( char * body )
{
bool parsed;
scan_string_init(body);
parsed = !yyparse();
}
process_macro_expression( node_pt expr )
{
}
#endif
char* combined_name(char* name, int ord)
{
static char buf[200];
if(ord == -1)
return name;
sprintf(buf, "%s.%s", unit_name(ord), name);
return buf;
}
char* packaged_name(char* name, file_pos_t macro_pos, file_pos_t subp_pos)
{
if(pos_unit(macro_pos) == pos_unit(subp_pos))
{
return name;
}
else
{
return combined_name(name, pos_unit(subp_pos));
}
}
static int gen_mconst(macro_t* m, int import)
{
cpp_eval_result_t result;
int is_wide_string = 0;
char* tname = NULL;
typeinfo_t* t = NULL;
macro_t* mbody;
if((m->macro_params != -1) || !strcmp(m->macro_name, "NULL"))
{
return 0;
}
output_to(m->macro_declared_in_header);
put_comment_block(m->comment, 4);
if((m->macro_body == NULL) || (m->macro_body_len < 1))
{
gen_const_bool(m->macro_ada_name);
gen_comment(m);
return true;
}
if(strstr(m->macro_name, "NULL") != NULL)
{
warning(file_name(m->macro_definition), line_number(m->macro_definition),
"macro %s contains NULL", m->macro_name);
}
/* TBD: parse_macro(m->macro_body); */
mbody = macro_find(m->macro_body);
if(mbody && m->macro_evald)
{
/* Duplicates an existing constant */
typeinfo_pt type = mbody->const_value.explicit_type;
if(type)
{
tname = type_nameof(type, 0, 0);
}
else if(IS_EVAL_STRING(mbody->const_value))
{
tname = string_name(0);
}
else
{
tname = 0;
}
gen_const_synonym(m->macro_ada_name, tname,
packaged_name(mbody->macro_ada_name, m->macro_definition,
mbody->macro_definition));
gen_comment(m);
return true;
}
result = cpp_eval(m->macro_body);
if((t = result.explicit_type))
{
tname = type_nameof(t, 0, 0);
}
if(EVAL_FAILED(result) && (ada_version >= 1995) && (m->macro_body[0] == 'L')
&& (m->macro_body[1] == '"'))
{
is_wide_string = 1;
result = cpp_eval(&m->macro_body[1]);
}
if(EVAL_FAILED(result))
{
/* make a try at finding ones coercions like #define x (int) 123 */
char *leftparen, *leftparen2, *rightparen;
rightparen = strchr(m->macro_body, ')');
if(rightparen != NULL)
{
for(leftparen2 = m->macro_body, leftparen = NULL;
(leftparen2 != NULL) && (leftparen2 < rightparen);)
{
leftparen = leftparen2;
leftparen2 = strchr(leftparen + 1, '(');
}
if(leftparen != NULL)
{
char buf[2048], *p1, *p2;
int len;
p1 = leftparen;
while(is_white((int)*++p1))
;
p2 = rightparen;
while(is_white((int)*--p2))
;
len = p2 - p1 + 1;
strncpy(buf, p1, len);
buf[len] = '\0';
t = grok_coercion(buf);
if(t != NULL)
{
strcpy(buf, m->macro_body);
memset(&buf[leftparen - m->macro_body], ' ', rightparen - leftparen + 1);
result = cpp_eval(buf);
tname = type_nameof(t, 0, 0);
goto after_coercion;
}
}
}
return false;
}
after_coercion:
if(IS_EVAL_INT(result))
{
char* first = strchr(m->macro_body, '\'');
if(first != NULL)
{
char tmp = EVAL_INT(result);
gen_const_char(m->macro_ada_name, &tmp);
}
else if(import == -1)
{
int res = EVAL_INT(result);
if((t != NULL) && (t->type_kind == pointer_to) && (res == 0))
{
gen_const_ref(m->macro_ada_name, tname, res);
}
else
{
gen_const_int(m->macro_ada_name, tname, res, result.base);
}
}
else
{
gen_const_rename(m->macro_ada_name, import, tname);
}
gen_comment(m);
return true;
}
if(IS_EVAL_FLOAT(result))
{
if(import == -1)
{
gen_const_float(m->macro_ada_name, m->macro_body);
}
else
{
gen_const_rename(m->macro_ada_name, import, "");
}
gen_comment(m);
return true;
}
if(IS_EVAL_STRING(result))
{
if(import == -1)
{
gen_char_array(m->macro_ada_name, EVAL_STRING(result), is_wide_string, true);
}
else
{
char buf[20];
sprintf(buf, " %s", string_name(0));
gen_const_rename(m->macro_ada_name, import, buf);
}
gen_comment(m);
return true;
}
return false;
}
static void do_macro_body(char* buf, const char* ret, const char* coercion, const char* fname, const char* all, const char* params)
{
params = no_empty_params(params);
if(coercion == NULL)
sprintf(buf, "%s %s%s%s;", ret, fname, all, params);
else
sprintf(buf, "%s %s(%s%s%s);", ret, coercion, fname, all, params);
}
static char* coercion_name(int has_coercion, typeinfo_t* coercion)
{
char *s, *dot;
if(!has_coercion)
return NULL;
s = type_nameof(coercion, 0, 0);
dot = strrchr(s, '.');
if((dot != NULL) && !strcmp(dot, ".void"))
return NULL;
return s;
}
static symbol_t* bogus_param(char* new_param_name)
{
symbol_t* param;
param = new_sym();
param->sym_ada_name = new_param_name;
param->sym_type = bogus_type;
return param;
}
static symbol_t* copy_nth_param(symbol_t* func_sym, int n, char* new_param_name)
{
symbol_t* param;
int i;
for(param = func_sym->sym_tags, i = 0; param != NULL; param = param->sym_parse_list, i++)
{
if(i == n)
{
param = copy_sym(param);
param->sym_ada_name = new_param_name;
return param;
}
}
return bogus_param(new_param_name);
}
static void gen_macro_func(symbol_t* func_sym, macro_t* m, int import)
{
symbol_t *macro_sym, *mparam, *last_mparam;
typeinfo_t* coercion;
int i, j, is_pointer, has_coercion;
char *name1, *name2, *rhsname;
char body_buf[MAX_OUTBUF_LEN];
assert(m != NULL);
assert(m->macro_func != NULL);
macro_sym = copy_sym(func_sym);
is_pointer = m->macro_func->mf_is_pointer;
if(is_pointer)
{
assert((func_sym->sym_type != NULL) && (func_sym->sym_type->type_kind == pointer_to)
&& (func_sym->sym_type->type_next != NULL)
&& (func_sym->sym_type->type_next->type_kind == function_type)
&& (func_sym->sym_type->type_base != NULL));
macro_sym->sym_type = func_sym->sym_type->type_next;
}
macro_sym->sym_ada_name = (m->macro_ada_name) ?
m->macro_ada_name :
ada_name(m->macro_name, pos_unit(m->macro_definition));
macro_sym->sym_def = m->macro_definition;
macro_sym->sym_hash = 0;
macro_sym->sym_hash_list = NULL;
macro_sym->comment = NULL;
has_coercion = (m->macro_func->mf_coercion != NULL);
if(has_coercion)
{
macro_sym->sym_type = copy_type(func_sym->sym_type);
coercion = grok_coercion(m->macro_func->mf_coercion);
if(coercion == NULL)
{
error(__FILE__, __LINE__, "type coercion (%s)", m->macro_func->mf_coercion);
/* } else if (coercion->type_kind == pointer_to) { */
/* macro_sym->sym_type = coercion; */
}
else
{
macro_sym->sym_type->type_next = coercion;
}
rhsname = strstr(m->macro_func->mf_rhs, func_sym->sym_ada_name);
assert(rhsname != NULL);
}
else
{
rhsname = m->macro_func->mf_rhs;
}
if(m->macro_params == 0)
{
macro_sym->sym_tags = NULL;
}
else
{
for(i = 0; i < m->macro_params; i++)
{
mparam = NULL;
name1 = m->macro_param_vec[i];
for(j = 0; j < m->macro_func->mf_nparams; j++)
{
name2 = m->macro_func->mf_params[j];
if(match_param_name(name1, name2))
{
if(is_pointer)
mparam = copy_nth_param(func_sym->sym_type->type_base, j, name1);
else
mparam = copy_nth_param(func_sym, j, name1);
break;
}
}
if(mparam == NULL)
mparam = bogus_param(name1);
else
mparam->sym_ada_name = ada_name(mparam->sym_ada_name, -1);
if(i == 0)
macro_sym->sym_tags = mparam;
else
last_mparam->sym_parse_list = mparam;
last_mparam = mparam;
}
if(i > 0)
mparam->sym_parse_list = NULL;
}
name1 = func_sym->sym_ident->node.str.form;
name2 = strchr(strstr(rhsname, name1) + strlen(name1), '(');
name1 = packaged_name(func_sym->sym_ada_name, m->macro_definition, func_sym->sym_def);
do_macro_body(body_buf, (is_function(func_sym) ? "return" : ""),
coercion_name(has_coercion, coercion), name1,
(is_pointer ? ".all" : ""), name2);
macro_sym->has_initializer = 1;
macro_sym->sym_value.body = new_stmt_Compound(
m->macro_definition, NULL, new_stmt_MacroBody(m->macro_definition, body_buf));
if(m->macro_declared_in_header)
{
output_to_spec();
put_comment_block(m->comment, 4);
gen_subp(macro_sym, NULL, 1, 1, 0);
output_to_body();
put_comment_block(m->comment, 4);
gen_subp(macro_sym, NULL, 0, 1, 0);
}
else
{
output_to_body();
put_comment_block(m->comment, 4);
gen_subp(macro_sym, NULL, 0, 1, 0);
}
}
static void check_interf(macro_t* m, symbol_t* sym)
{
/*
* if a macro and a function have the same name,
* import the function before declaring the macro
*/
if((!strcmp(sym->sym_ada_name, m->macro_name)) && (sym->interfaced == 0))
{
output_to(sym->is_declared_in_header);
interface_c(sym, 4);
put_char('\n');
sym->interfaced = 1;
}
}
/* ***************
* Top level stuff
* ***************/
void gen_macro_names()
{
macro_t* m;
macro_function_t* mf;
int i;
unit_n unit;
char c, *name, *p1, *p2, rhs_buf[MAX_OUTBUF_LEN];
for(m = macro_list_head; m != NULL; m = m->macro_next)
{
if(could_be_ada_ident(m->macro_name))
{
unit = pos_unit(m->macro_definition);
m->macro_ada_name = ada_name(m->macro_name, unit);
if(m->macro_params == -1)
{
mf = grok_macro_function(m->macro_body);
if(mf != NULL)
{
mf->mf_rhs = m->macro_body;
m->macro_func = mf;
m->macro_params = 0;
}
}
else if((m->macro_body != NULL) && (m->macro_params != -1)
&& (m->macro_func == NULL))
{
for(p1 = m->macro_body, p2 = rhs_buf; *p1;)
{
c = *p1++;
if(c == PARAM_START)
{
name = m->macro_param_vec[(*p1++) - 1];
name = ada_name(name, -1);
strcpy(p2, name);
p2 += strlen(name);
deallocate(name);
}
else
{
*p2++ = c;
}
}
*p2 = '\0';
m->macro_func = grok_macro_function(rhs_buf);
if(m->macro_func != NULL)
m->macro_func->mf_rhs = new_string(rhs_buf);
for(i = 0; i < m->macro_params; i++)
{
name = m->macro_param_vec[i];
m->macro_param_vec[i] = ada_name(name, -1);
deallocate(name);
}
}
m->macro_valid = 1;
}
}
}
void rethread_macros()
{
macro_t *m, *next;
assert(auto_package);
for(m = macro_list_head; m; m = next)
{
next = m->macro_next;
m->macro_next = NULL;
macro_enq(m);
}
}
void gen_macro_constants(macro_t* m, int import)
{
while(m != NULL)
{
if(m->macro_valid && !m->macro_gened)
m->macro_gened = gen_mconst(m, import);
m = m->macro_next;
}
}
void import_macro_constants()
{
int i;
int uord;
if(!should_import())
return;
for(i = 0;; i++)
{
uord = nth_direct_ref_unit_ord(i);
if(uord == -1)
break;
gen_macro_constants(unit_macros[uord], uord);
}
}
void gen_macro_types(macro_t* m, int import)
{
typeinfo_t* t;
while(m != NULL)
{
if((m->macro_valid && !m->macro_gened) && (m->macro_func == NULL)
&& (m->macro_params == -1) && (t = grok_coercion(m->macro_body)) != NULL)
{
output_to(m->macro_declared_in_header);
subtype_decl(m->macro_name, NULL, type_nameof(t, 0, 0), 4, NULL, m->macro_definition);
m->macro_gened = 1;
}
m = m->macro_next;
}
}
void gen_macro_vars(macro_t* m, int import, int colonpos)
{
symbol_t* sym;
while(m != NULL)
{
if(m->macro_valid && !m->macro_gened && (m->macro_body != NULL))
{
/* for #define var2 var, generate "var2: integer renames var1 */
output_to(m->macro_declared_in_header);
if((m->macro_func == NULL) && ((sym = find_sym(m->macro_body)) != NULL)
&& (sym->sym_kind == var_symbol))
{
symbol_t* msym = new_sym();
*msym = *sym;
msym->sym_ada_name = m->macro_name;
msym->sym_def = m->macro_definition;
msym->comment = m->comment;
msym->emitted = false;
gen_var_or_field(msym, 4, colonpos, import,
combined_name(sym->sym_ada_name, import), 0);
m->macro_gened = 1;
}
else if((m->macro_func != NULL)
&& ((sym = find_sym(m->macro_func->mf_fname)) != NULL)
&& is_function_pointer(sym->sym_type))
{
/* #define f(x) (*pf)(x) */
gen_macro_func(sym, m, import);
m->macro_gened = 1;
}
}
m = m->macro_next;
}
}
void gen_macro_funcs(macro_t* m, int import)
{
symbol_t* sym;
char *tmp_name, *rename;
comment_block_pt tmp_comment;
char buf[100];
file_pos_t tmp_pos;
while(m != NULL)
{
if(m->macro_valid && !m->macro_gened && (m->macro_body != NULL))
{
if((m->macro_func != NULL) && ((sym = find_sym(m->macro_func->mf_fname)) != NULL)
&& (sym->sym_kind == func_symbol)
&& !strcmp(sym->sym_ident->node.id.name, m->macro_func->mf_fname))
{
/* recognize #define func1(...) func2(...), */
check_interf(m, sym);
gen_macro_func(sym, m, import);
m->macro_gened = 1;
}
else if((m->macro_func == NULL) && ((sym = find_sym(m->macro_body)) != NULL)
&& (sym->sym_kind == func_symbol))
{
/* recognize #define func1 func2 */
tmp_name = sym->sym_ada_name;
tmp_pos = sym->sym_def;
tmp_comment = sym->comment;
if(pos_unit(sym->sym_def) == pos_unit(m->macro_definition))
{
rename = combined_name(tmp_name, import);
}
else
{
rename = combined_name(tmp_name, pos_unit(sym->sym_def));
}
sprintf(buf, "\n renames %s", rename);
sym->sym_ada_name = m->macro_name;
sym->sym_def = m->macro_definition;
sym->comment = m->comment;
gen_subp(sym, buf, m->macro_declared_in_header, 0, 0);
sym->sym_ada_name = tmp_name;
sym->sym_def = tmp_pos;
sym->comment = tmp_comment;
m->macro_gened = 1;
}
}
m = m->macro_next;
}
}
void finish_macros(macro_t* m)
{
macro_t* next;
while(m != NULL)
{
next = m->macro_next;
if(!m->macro_gened)
add_to_unknown_list(m);
m = next;
}
}
/* ***************************************
* Regular expression recognition routines
* ***************************************/
/*
* Implementation of regexp.h's step() in terms of regex.h.
*/
static int step_impl(const char* string, const regex_t* expbuf)
{
regmatch_t match;
if(regexec(expbuf, string, 1, &match, 0) == 0)
{
loc1 = (char*)string + match.rm_so;
loc2 = (char*)string + match.rm_eo;
return 1;
}
else
{
return 0;
}
}
int regerr(int err)
{
printf("regular expression error %d\n", err);
exit(1);
}
static char *new_str(char* sloc1, char* sloc2)
{
int len;
char* p;
len = sloc2 - sloc1;
assert(len > 0);
p = (char*)malloc(len + 1);
strncpy(p, sloc1, len);
p[len] = '\0';
return p;
}
static void init_regex()
{
static int first_time = 1;
if(!first_time)
return;
#ifdef DEBUG
{
extern void setbuf();
setbuf(stdout, NULL);
}
#endif
#define COMP(str, buf) regcomp(&buf, str, 0)
COMP(ident, ident_buf);
COMP(in_parens, in_parens_buf);
COMP(next_arg, next_arg_buf);
COMP(empty_params_name, empty_params_buf);
COMP(char_name, char_buf);
COMP(const_name, const_buf);
COMP(double_name, double_buf);
COMP(float_name, float_buf);
COMP(int_name, int_buf);
COMP(long_name, long_buf);
COMP(short_name, short_buf);
COMP(signed_name, signed_buf);
COMP(star_name, star_buf);
COMP(struct_name, struct_buf);
COMP(union_name, union_buf);
COMP(unsigned_name, unsigned_buf);
COMP(void_name, void_buf);
#undef COMP
first_time = 0;
}
static void unbalanced(char* loc)
{