nexmon – Rev 1
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/*
* Copyright 2012-2013, Jakub Zawadzki <darkjames-ws@darkjames.pl>
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include "ast.h"
#include "xmem.h"
int npl_parse_file(npl_code_t *code, FILE *f, const char *filename); /* parser.l */
struct ettinfo {
struct ettinfo *next;
npl_struct_t *st;
};
struct hfinfo {
struct hfinfo *next;
struct _npl_statement_field *st;
const char *parent;
const char *hf_type;
};
enum symbol_type {
SYMBOL_ANY = (~0),
SYMBOL_EXPR = (1 << 0),
SYMBOL_STRUCT = (1 << 1),
SYMBOL_TABLE = (1 << 2),
SYMBOL_TYPE = (1 << 3),
SYMBOL_FIELD = (1 << 4),
SYMBOL_SIMPLE = (1 << 5),
SYMBOL_PROTO = (1 << 6),
};
struct symbol {
struct symbol *next;
const char *id;
void *data;
unsigned int hash;
enum symbol_type type;
int lvl;
int is_static:1;
int is_used:1;
};
struct parent_info {
const char *id;
npl_expression_t *byte_order;
int cur_offset;
/* size, offset, bitoffset, ... ? */
};
static struct symbol *gen_expr(FILE *f, npl_expression_t *e);
static void gen_statements(FILE *f, struct parent_info *parent, struct _npl_statements *sts);
static void gen_struct(FILE *f, npl_struct_t *s, npl_attribute_list_t *attr_list);
static struct symbol *symbols;
static struct hfinfo *hfs;
static struct ettinfo *etts;
static npl_expression_t format_string_e;
static npl_expression_t is_value_none_e;
static npl_expression_t this_e;
static npl_expression_t property_e;
static npl_expression_t global_e;
static npl_expression_t local_e;
static void _fail(const char *file, int line, const char *msg) {
fprintf(stderr, "!!! %s:%d fail(%s)\n", file, line, msg);
abort();
}
#define fail(msg) _fail(__FILE__, __LINE__, msg)
#define xassert(expr) \
do { if (!(expr)) fail("Assertion failed: " #expr); } while(0);
static int symbols_lvl = 0;
static struct symbol *
symbols_push(void)
{
symbols_lvl++;
return symbols;
}
static void
symbols_pop(struct symbol *sym)
{
--symbols_lvl;
while (symbols != sym) {
struct symbol *s = symbols;
symbols = symbols->next;
free(s);
}
}
static unsigned int
symbol_hash(const char *str)
{
unsigned int hash = 5381;
while (*str) {
hash = ((hash << 5) + hash) + tolower(*str);
str++;
}
return hash;
}
static struct symbol *
symbol_find(const char *id, int type)
{
struct symbol *sym;
unsigned int hash;
hash = symbol_hash(id);
for (sym = symbols; sym; sym = sym->next) {
if (sym->hash == hash && !strcasecmp(sym->id, id)) {
// XXX, check type
return sym;
}
}
return NULL;
}
static struct symbol *
symbol_add(const char *id, enum symbol_type type, void *data)
{
struct symbol *sym;
sym = symbol_find(id, SYMBOL_ANY);
if (sym) {
if (sym->lvl == symbols_lvl) {
fprintf(stderr, "Error: symbol %s already added [type: %d]\n", id, sym->type);
abort();
} else
fprintf(stderr, "Warning: symbol %s shadow another symbol [type: %d]\n", id, sym->type);
}
sym = xnew(struct symbol);
sym->id = id;
sym->hash = symbol_hash(id);
sym->type = type;
sym->lvl = symbols_lvl;
sym->data = data;
sym->next = symbols;
symbols = sym;
return sym;
}
static struct ettinfo *
ett_add(npl_struct_t *st)
{
struct ettinfo *new = xnew(struct ettinfo);
new->st = st;
new->next = etts;
etts = new;
return new;
}
static const char *
ett_var(const struct ettinfo *ett)
{
static char ett_name[256];
snprintf(ett_name, sizeof(ett_name), "ett_%s", ett->st->id);
return ett_name;
}
static struct hfinfo *
hfi_add(struct _npl_statement_field *st, const struct parent_info *parent)
{
struct hfinfo *new = xnew(struct hfinfo);
new->st = st;
new->parent = parent->id;
new->next = hfs;
hfs = new;
return new;
}
static size_t
hfi_put_name(char *buf, size_t buflen, const char *str)
{
size_t pos = 0;
int i;
int t = 0;
int toldup = -1;
for (i = 0; str[i]; i++) {
int tup = isupper(str[i]);
if (toldup != tup && tup) {
if (t > 0) {
if (pos < buflen)
buf[pos++] = '_';
}
t++;
}
toldup = tup;
if (pos < buflen)
buf[pos++] = tolower(str[i]);
}
return pos;
}
static const char *
hfi_var(const struct hfinfo *hfi)
{
static char hf_name[256];
size_t pos;
pos = snprintf(hf_name, sizeof(hf_name), "hf_field_");
xassert(pos < sizeof(hf_name));
if (hfi->parent) {
pos += hfi_put_name(hf_name + pos, sizeof(hf_name) - pos, hfi->parent);
xassert(pos < sizeof(hf_name));
hf_name[pos++] = '_';
xassert(pos < sizeof(hf_name));
}
pos += hfi_put_name(hf_name + pos, sizeof(hf_name) - pos, hfi->st->id);
xassert(pos < sizeof(hf_name));
hf_name[pos++] = '\0';
return hf_name;
}
static const char *
hfi_name(const struct hfinfo *hfi)
{
return hfi->st->id;
}
static const char *
hfi_filter(const struct hfinfo *hfi)
{
static char filter_name[1024];
size_t pos;
pos = 0;
if (hfi->parent) {
pos += hfi_put_name(filter_name + pos, sizeof(filter_name)-pos, hfi->parent);
xassert(pos < sizeof(filter_name));
filter_name[pos++] = '.';
xassert(pos < sizeof(filter_name));
}
pos += hfi_put_name(filter_name + pos, sizeof(filter_name)-pos, hfi->st->id);
xassert(pos < sizeof(filter_name));
filter_name[pos++] = '\0';
xassert(pos < sizeof(filter_name));
return filter_name;
}
static const char *
hfi_type(const struct hfinfo *hfi)
{
if (hfi->hf_type)
return hfi->hf_type;
/* TODO stub */
return "FT_BYTES";
}
static const char *
hfi_display(const struct hfinfo *hfi)
{
/* TODO stub */
return "BASE_NONE";
}
static unsigned int
hfi_mask(const struct hfinfo *hfi)
{
/* TODO stub */
return 0;
}
static int
count_expression_list(const npl_expression_list_t *exprs)
{
int c = 0;
while (exprs) {
c++;
exprs = exprs->next;
}
return c;
}
static struct symbol *
expr_to_symbol(const npl_expression_t *e)
{
struct symbol *sym = NULL;
if (e->type == EXPRESSION_ID) {
const char *id = e->id.id;
sym = symbol_find(id, SYMBOL_ANY);
if (!sym) {
fprintf(stderr, "can't find id: %s\n", id);
abort();
}
/* XXX, sym->is_used */
if (sym->type == SYMBOL_EXPR) {
struct symbol *new_sym = expr_to_symbol(sym->data);
if (new_sym)
sym = new_sym;
}
}
return sym;
}
static int
expr_to_const_int(const npl_expression_t *e, int *val)
{
struct symbol *sym;
if (e->type == EXPRESSION_INT) {
*val = e->num.digit;
return 1;
}
if (e->type == EXPRESSION_UNARY) {
if (!expr_to_const_int(e->u.operand, val))
return 0;
switch (e->u.operator) {
case OP1_MINUS:
*val = -(*val);
return 1;
case OP1_NEG:
*val = ~(*val);
return 1;
case OP1_NOT:
*val = !(*val);
return 1;
}
return 0;
}
sym = expr_to_symbol(e);
if (sym && sym->type == SYMBOL_EXPR)
return expr_to_const_int(sym->data, val);
return 0;
}
static int
expr_to_const_str(const npl_expression_t *e, const char **val)
{
struct symbol *sym;
if (e->type == EXPRESSION_STR) {
*val = e->str.str;
return 1;
}
sym = expr_to_symbol(e);
if (sym && sym->type == SYMBOL_EXPR)
return expr_to_const_str(sym->data, val);
return 0;
}
static const char *
type_to_ctype(const npl_type_t *t, int size)
{
switch (t->type) {
case FIELD_DECIMAL:
if (size == 4)
return "float";
if (size == 8)
return "double";
fprintf(stderr, "!!! decimal, size: %d\n", size);
return NULL;
case FIELD_NUMBER:
if (size == 1)
return "gint8";
if (size == 2)
return "gint16";
if (size == 3 || size == 4)
return "gint32";
if (size > 4 && size <= 8)
return "gint64";
fprintf(stderr, "!!! number, size: %d\n", size);
return NULL;
case FIELD_UNSIGNED_NUMBER:
if (size == 1)
return "guint8";
if (size == 2)
return "guint16";
if (size == 3 || size == 4)
return "guint32";
if (size > 4 && size <= 8)
return "guint64";
fprintf(stderr, "!!! number, size: %d\n", size);
return NULL;
case FIELD_TIME:
return "nstime_t";
}
fprintf(stderr, "!!! not handled, type: %d, size: %d\n", t->type, size);
return NULL;
}
#define NPL_ENDIAN_LE 0
#define NPL_ENDIAN_BE 1
static const char *
type_to_tvb(const npl_type_t *t, int size, int endian)
{
switch (t->type) {
case FIELD_DECIMAL:
if (size == 4 && endian == NPL_ENDIAN_LE)
return "tvb_get_letohieee_float";
if (size == 4 && endian == NPL_ENDIAN_BE)
return "tvb_get_ntohieee_float";
if (size == 8 && endian == NPL_ENDIAN_LE)
return "tvb_get_letohieee_double";
if (size == 8 && endian == NPL_ENDIAN_BE)
return "tvb_get_ntohieee_double";
fprintf(stderr, "!!! decimal, size: %d, endian: %d\n", size, endian);
return NULL;
case FIELD_UNSIGNED_NUMBER:
case FIELD_NUMBER:
if (size == 1)
return "tvb_get_guint8";
if (size == 2 && endian == NPL_ENDIAN_LE)
return "tvb_get_letohs";
if (size == 2 && endian == NPL_ENDIAN_BE)
return "tvb_get_ntohs";
if (t->type == FIELD_UNSIGNED_NUMBER && size == 3 && endian == NPL_ENDIAN_LE)
return "tvb_get_letoh24";
if (t->type == FIELD_UNSIGNED_NUMBER && size == 3 && endian == NPL_ENDIAN_BE)
return "tvb_get_ntoh24";
if (size == 4 && endian == NPL_ENDIAN_LE)
return "tvb_get_letohl";
if (size == 4 && endian == NPL_ENDIAN_BE)
return "tvb_get_ntohl";
fprintf(stderr, "!!! number, size: %d, endian: %d\n", size, endian);
return NULL;
}
fprintf(stderr, "!!! not handled, type: %d, size: %d, endian: %d\n", t->type, size, endian);
return NULL;
}
static const char *
type_to_ft(const npl_type_t *t, int size)
{
switch (t->type) {
case FIELD_DECIMAL:
if (size == 4)
return "FT_FLOAT";
if (size == 8)
return "FT_DOUBLE";
fprintf(stderr, "!!! decimal, size: %d\n", size);
return NULL;
case FIELD_NUMBER:
if (size == 1)
return "FT_INT8";
if (size == 2)
return "FT_INT16";
if (size == 3)
return "FT_INT24";
if (size == 4)
return "FT_INT32";
if (size > 4 && size <= 8)
return "FT_INT64";
fprintf(stderr, "!!! number, size: %d\n", size);
return NULL;
case FIELD_UNSIGNED_NUMBER:
if (size == 1)
return "FT_UINT8";
if (size == 2)
return "FT_UINT16";
if (size == 3)
return "FT_UINT24";
if (size == 4)
return "FT_UINT32";
if (size > 4 && size <= 8)
return "FT_UINT64";
fprintf(stderr, "!!! number, size: %d\n", size);
return NULL;
case FIELD_TIME:
/* XXX, FT_ABSOLUTE_TIME or FT_RELATIVE_TIME? */
fprintf(stderr, "!!! time, size: %d\n", size);
return "FT_ABSOLUTE_TIME";
}
fprintf(stderr, "!!! not handled, type: %d, size: %d\n", t->type, size);
return NULL;
}
#define gen_fprintf(f, args...) \
do { \
if (f) fprintf(f, args); \
} while (0)
static const char *
op1_to_str(npl_op1_t op)
{
switch (op) {
case OP1_MINUS:
return "-";
case OP1_NOT:
return "!";
case OP1_NEG:
return "~";
}
fprintf(stderr, "XXX op: %d\n", op);
return "";
}
static const char *
op2_to_str(npl_op2_t op)
{
switch (op) {
case OP2_PLUS:
return "+";
case OP2_MINUS:
return "-";
case OP2_SHL:
return "<<";
case OP2_SHR:
return ">>";
case OP2_EQUAL:
return "==";
case OP2_NOTEQUAL:
return "!=";
case OP2_LOGIC_OR:
return "||";
case OP2_LOGIC_AND:
return "&&";
case OP2_OR:
return "|";
case OP2_XOR:
return "^";
case OP2_AND:
return "&";
case OP2_GREATER:
return ">";
case OP2_GEQUAL:
return ">=";
case OP2_LESS:
return "<";
case OP2_LEQUAL:
return "<=";
}
fprintf(stderr, "XXX op: %d\n", op);
return "";
}
enum attr_flag {
ATTR_PROPERTY = 0,
ATTR_GLOBAL = 1 << 0,
ATTR_LOCAL = 1 << 1,
ATTR_CONV = 1 << 5,
ATTR_POST = 1 << 10
};
static enum attr_flag
resolve_attr_id(const char *id)
{
if (!strcasecmp(id, "property"))
return ATTR_PROPERTY;
if (!strcasecmp(id, "Global"))
return ATTR_GLOBAL;
if (!strcasecmp(id, "local"))
return ATTR_LOCAL;
if (!strcasecmp(id, "conversation"))
return ATTR_CONV;
if (!strcasecmp(id, "post"))
return ATTR_POST;
fprintf(stderr, ":: attr-id: %s\n", id);
abort();
return -1;
}
static int
resolve_attr_expr(const struct _npl_expression *expr)
{
int flags = 0;
switch (expr->type) {
case EXPRESSION_ID:
flags |= (int) resolve_attr_id(expr->id.id);
break;
case EXPRESSION_FIELD:
flags |= resolve_attr_expr(expr->fld.base);
flags |= (int) resolve_attr_id(expr->fld.field);
break;
default:
fprintf(stderr, "resolve_attr_expr() %d\n", expr->type);
break;
}
xassert(!((flags & ATTR_GLOBAL) && (flags & ATTR_LOCAL)));
return flags;
}
static void
resolve_attr_list(npl_attribute_list_t *attr)
{
while (attr) {
struct _npl_expression *expr;
const char *id = NULL;
int flags = 0;
if (attr->expr->type == EXPRESSION_BINARY && attr->expr->b.operator == OP2_ASSIGN) {
/* XXX, handle: a = b = c ? */
expr = attr->expr->b.operand1;
attr->assign_expr = attr->expr->b.operand2;
} else
expr = attr->expr;
switch (expr->type) {
case EXPRESSION_ID:
id = expr->id.id;
break;
case EXPRESSION_FIELD:
flags = resolve_attr_expr(expr->fld.base);
id = expr->fld.field;
break;
default:
fprintf(stderr, "resolve_attr_list() expr: %d\n", expr->type);
break;
}
attr->flags = flags;
attr->resolved = id;
attr = attr->next;
}
}
static void
gen_expr_field(FILE *f, struct _npl_statement_field *field)
{
xassert(field->generate_var || f == NULL);
field->generate_var = 1;
gen_fprintf(f, "_field_%s", field->id);
}
static void
gen_expr_type(FILE *f, npl_type_t *t)
{
int size = -1;
int byte_order = -1;
const char *fetch_func;
if (t->size && !expr_to_const_int(t->size, &size))
fprintf(stderr, "!!! expr_to_const_int(size) failed for type: %s\n", t->id);
if (t->byte_order && !expr_to_const_int(t->byte_order, &byte_order))
fprintf(stderr, "!!! expr_to_const_int(byte_order) failed for type: %s\n", t->id);
fetch_func = type_to_tvb(t, size, byte_order);
if (fetch_func)
gen_fprintf(f, "%s", fetch_func);
else
gen_fprintf(f, "<<TYPE %s>>", t->id);
}
static void
gen_expr_table(FILE *f, npl_table_t *t)
{
gen_fprintf(f, " format_table_%s ", t->id);
}
static struct symbol *
gen_expr(FILE *f, npl_expression_t *e)
{
switch (e->type) {
case EXPRESSION_ID:
{
struct symbol *sym = symbol_find(e->id.id, SYMBOL_EXPR | SYMBOL_FIELD | SYMBOL_TYPE | SYMBOL_SIMPLE | SYMBOL_TABLE);
if (!sym) {
fprintf(stderr, "can't find id: %s\n", e->id.id);
abort();
}
sym->is_used = 1;
if (sym->type == SYMBOL_EXPR)
gen_expr(f, sym->data);
else if (sym->type == SYMBOL_FIELD)
gen_expr_field(f, sym->data);
else if (sym->type == SYMBOL_TYPE)
gen_expr_type(f, sym->data);
else if (sym->type == SYMBOL_TABLE)
gen_expr_table(f, sym->data);
else if (sym->type == SYMBOL_SIMPLE)
gen_fprintf(f, "%s", (const char *) sym->data);
else {
fprintf(stderr, "ID %s wrong type [%d]\n", sym->id, sym->type);
abort();
}
return sym;
}
case EXPRESSION_INT:
gen_fprintf(f, " %d ", e->num.digit);
return NULL;
case EXPRESSION_STR:
// XXX e->str.str is escaped, almost like C-string so just print it.
gen_fprintf(f, " \"%s\" ", e->str.str);
return NULL;
case EXPRESSION_UNARY:
gen_fprintf(f, "(");
gen_fprintf(f, "%s", op1_to_str(e->u.operator));
gen_expr(f, e->u.operand);
gen_fprintf(f, ")");
return NULL;
case EXPRESSION_BINARY:
gen_fprintf(f, "(");
gen_expr(f, e->b.operand1);
gen_fprintf(f, " %s ", op2_to_str(e->b.operator));
gen_expr(f, e->b.operand2);
gen_fprintf(f, ")");
return NULL;
case EXPRESSION_CALL:
{
npl_expression_list_t *arg;
struct symbol *sym;
const char *ind = "";
sym = gen_expr(NULL, e->call.fn);
if (!sym) {
fprintf(stderr, "can't call no-symbol\n");
abort();
}
/* XXX check if sym->type can be called (function) */
gen_expr(f, e->call.fn);
gen_fprintf(f, "(");
for (arg = e->call.args; arg; arg = arg->next) {
gen_fprintf(f, "%s", ind);
gen_expr(f, arg->expr);
ind = ", ";
}
gen_fprintf(f, ")");
return NULL;
}
case EXPRESSION_COND:
gen_fprintf(f, "((");
gen_expr(f, e->c.test_expr);
gen_fprintf(f, ") ? ");
gen_expr(f, e->c.true_expr);
gen_fprintf(f, " : ");
gen_expr(f, e->c.false_expr);
gen_fprintf(f, ")");
return NULL;
case EXPRESSION_FIELD:
{
struct symbol *sym;
sym = gen_expr(NULL, e->fld.base);
if (!sym) {
fprintf(stderr, "can't field no-symbol (accessing %s)\n", e->fld.field);
abort();
}
/* XXX check if sym->type can be dereferenced (struct) */
if (sym->data == &property_e) {
gen_fprintf(f, "<< PROPERTY %s>>", e->fld.field);
} else if (sym->data == &local_e) {
gen_fprintf(f, "_local_property_%s", e->fld.field);
} else if (sym->data == &global_e) {
gen_fprintf(f, "<< GLOBAL PROPERTY %s>>", e->fld.field);
} else {
gen_expr(f, e->fld.base);
gen_fprintf(f, ".%s ", e->fld.field);
}
return NULL;
}
}
if (e == &this_e)
gen_fprintf(f, "<< this >>");
else if (e == &format_string_e)
gen_fprintf(f, "<< FORMAT STRING >>");
else if (e == &is_value_none_e)
gen_fprintf(f, "<< IS VALUE NONE >>");
else if (e == &property_e || e == &global_e || e == &local_e)
{ /* silent expr->type: 0 warnings */ }
else
fprintf(stderr, "XXX expr->type: %d\n", e->type);
return NULL;
}
enum table_struct { TABLE_FULL, TABLE_VALUE_STRING, TABLE_STRING_STRING };
static enum table_struct
gen_table_struct(FILE *f, npl_table_t *t)
{
struct npl_table_case *c;
int all_int = 1;
int all_str = 1;
if (t->params.count > 1 || !t->switch_expr)
return TABLE_FULL;
for (c = t->cases; c; c = c->next) {
const char *str;
int val;
if (!c->return_expr || !expr_to_const_str(c->return_expr, &str))
return 0;
if (all_int && !expr_to_const_int(&c->e, &val))
all_int = 0;
if (all_str && !expr_to_const_str(&c->e, &str))
all_str = 0;
if (!all_int && !all_str)
return TABLE_FULL;
}
/* table can be converted to value_string, generate one */
if (all_int) {
gen_fprintf(f,
"static const value_string %s_vals[] = {\n",
t->id);
if (f)
for (c = t->cases; c; c = c->next) {
const char *str;
int val;
/* checked above, should not fail now */
if (!expr_to_const_str(c->return_expr, &str))
fail("expr_to_const_str(str)");
if (!expr_to_const_int(&c->e, &val))
fail("expr_to_const_int(val)");
gen_fprintf(f, "\t{ 0x%x, \"%s\" },\n", val, str);
}
gen_fprintf(f, "\t{ 0, NULL }\n");
gen_fprintf(f, "};\n");
return TABLE_VALUE_STRING;
}
/* table can be converted to string_string, generate one */
if (all_str) {
gen_fprintf(f,
"static const string_string %s_vals[] = {\n",
t->id);
if (f)
for (c = t->cases; c; c = c->next) {
const char *str;
const char *val;
/* checked above, should not fail now */
if (!expr_to_const_str(c->return_expr, &str))
fail("expr_to_const_str(str)");
if (!expr_to_const_str(&c->e, &val))
fail("expr_to_const_str(val)");
gen_fprintf(f, "\t{ \"%s\", \"%s\" },\n", val, str);
}
gen_fprintf(f, "\t{ NULL, NULL }\n");
gen_fprintf(f, "};\n");
return TABLE_STRING_STRING;
}
return TABLE_FULL;
}
static void
gen_table_func(FILE *f, npl_table_t *t)
{
struct npl_table_case *c;
if (t->switch_expr) {
gen_fprintf(f, "\tswitch (");
gen_expr(f, t->switch_expr);
gen_fprintf(f, ") {\n");
for (c = t->cases; c; c = c->next) {
again1:
gen_fprintf(f, "\t\tcase ");
gen_expr(f, &c->e);
gen_fprintf(f, ": ");
if (!c->return_expr) {
c = c->next;
xassert(c != NULL);
gen_fprintf(f, "\n");
goto again1;
} else {
gen_fprintf(f, "\n");
gen_fprintf(f, "\t\t\treturn ");
gen_expr(f, c->return_expr);
gen_fprintf(f, ";\n");
}
}
gen_fprintf(f, "\t}\n");
} else {
for (c = t->cases; c; c = c->next) {
if (c == t->cases)
gen_fprintf(f, "\tif (");
else
gen_fprintf(f, "\telse if (");
again2:
gen_fprintf(f, "(");
gen_expr(f, &c->e);
gen_fprintf(f, ")");
if (!c->return_expr) {
gen_fprintf(f, " || ");
c = c->next;
xassert(c != NULL);
goto again2;
} else {
gen_fprintf(f, ")\n");
gen_fprintf(f, "\t\treturn ");
gen_expr(f, c->return_expr);
gen_fprintf(f, ";\n");
}
}
}
}
static void
decl_table(npl_table_t *t)
{
if (!t->sym)
t->sym = symbol_add(t->id, SYMBOL_TABLE, t);
}
static void
gen_table(FILE *f, npl_table_t *t)
{
struct symbol *symroot;
const char *first_arg;
enum table_struct type;
t->sym->is_static = 1;
gen_fprintf(f,
"static const char *\n"
"format_table_%s", t->id);
symroot = symbols_push();
gen_fprintf(f, "(");
if (t->params.count) {
int i;
for (i = 0; i < t->params.count; i++) {
if (i)
gen_fprintf(f, ", ");
gen_fprintf(f, "TYPE %s", t->params.args[i]);
symbol_add(t->params.args[i], SYMBOL_SIMPLE, t->params.args[i]);
}
first_arg = t->params.args[0];
} else {
/* default */
gen_fprintf(f, "TYPE value");
symbol_add("value", SYMBOL_SIMPLE, "value");
first_arg = "value";
}
gen_fprintf(f, ")\n{\n");
type = gen_table_struct(f, t);
switch (type) {
case TABLE_VALUE_STRING:
gen_fprintf(f, "\n");
gen_fprintf(f, "\tconst char *tmp = match_strval(%s_vals, %s);\n", t->id, first_arg);
gen_fprintf(f, "\tif (tmp)\n\t\treturn tmp;\n");
break;
case TABLE_STRING_STRING:
gen_fprintf(f, "\tconst char *tmp = match_strstr(%s_vals, %s);\n", t->id, first_arg);
gen_fprintf(f, "\tif (tmp)\n\t\treturn tmp;\n");
break;
case TABLE_FULL:
default:
gen_table_func(f, t);
break;
}
if (t->default_expr) {
gen_fprintf(f, "\treturn ");
gen_expr(f, t->default_expr);
gen_fprintf(f, ";\n");
} else
gen_fprintf(f, "\treturn \"\";\n");
gen_fprintf(f, "}\n\n");
symbols_pop(symroot);
}
static void
gen_field_proto(FILE *f, struct _npl_statement_field *field, npl_protocol_t *p)
{
/* XXX */
gen_fprintf(f, "\t << CALL PROTOCOL %s >>\n", p->id);
/* XXX, do we care? (only when not @ tail?) */
field->field_size = -1;
}
static void
gen_field_struct(FILE *f, struct _npl_statement_field *field, npl_struct_t *s)
{
// XXX st->f.bits, st->f.arr, st->f.format, st->f.sts
// XXX, st->f.generate_var
gen_fprintf(f, "\toffset = dissect_struct_%s(tvb, pinfo, tree, %s, offset);\n", s->tmpid, hfi_var(field->hfi));
field->hfi->hf_type = "FT_BYTES";
field->field_size = -1;
}
static void
gen_field_size(FILE *f, struct symbol *sym_size, int size)
{
if (sym_size) {
/* runtime */
if (sym_size->type == SYMBOL_FIELD) {
gen_fprintf(f, "_field_%s", sym_size->id);
} else if (sym_size->type == SYMBOL_EXPR) {
gen_fprintf(f, "(");
gen_expr(f, sym_size->data);
gen_fprintf(f, ") ");
} else if (sym_size->type == SYMBOL_SIMPLE) {
gen_fprintf(f, "%s ", (const char *) sym_size->data);
} else {
fprintf(stderr, "::: %s (%d)\n", sym_size->id, sym_size->type);
gen_fprintf(f, "<<SYMBOL %s>>\n", sym_size->id);
}
} else {
/* const */
gen_fprintf(f, "%d", size);
}
}
static void
gen_field_type(FILE *f, struct _npl_statement_field *field, npl_type_t *t)
{
struct symbol *symroot;
int i;
// XXX field.bits, field.arr, field.sts
int size = -1;
struct symbol *size_sym = NULL;
int byte_order = -1;
npl_expression_t *byte_order_expr;
struct symbol *byte_order_sym = NULL;
npl_expression_t *display_format;
const char *hf_type;
npl_expression_list_t *argv = field->params;
int argc = count_expression_list(argv);
if (t->params.count != argc) {
fprintf(stderr, "%s: number of params != number of argc (%d != %d)\n", t->id, t->params.count, argc);
abort();
}
symroot = symbols_push();
for (i = 0; i < argc; i++) {
symbol_add(t->params.args[i], SYMBOL_EXPR, argv->expr);
argv = argv->next;
}
xassert(t->size != NULL);
if (!expr_to_const_int(t->size, &size)) {
size_sym = expr_to_symbol(t->size);
if (!size_sym) {
fprintf(stderr, "!!! expr_to_const_int, _symbol(size) failed for type: %s\n", t->id);
abort();
}
}
if (field->byte_order_attr)
byte_order_expr = field->byte_order_attr;
else if (t->byte_order)
byte_order_expr = t->byte_order;
else
byte_order_expr = NULL;
if (field->format)
display_format = field->format;
else
display_format = t->display_format;
if (byte_order_expr) {
if (!expr_to_const_int(byte_order_expr, &byte_order)) {
byte_order_sym = expr_to_symbol(byte_order_expr);
if (!byte_order_sym) {
fprintf(stderr, "!!! expr_to_const_int, _symbol(byte_order) failed for type: %s\n", t->id);
abort();
}
}
}
if (field->generate_var) {
/* XXX, size_sym, byte_order_sym */
const char *ctype = type_to_ctype(t, size);
const char *fetch_func = type_to_tvb(t, size, byte_order);
/*
if (!ctype || !fetch_func)
abort();
*/
/* XXX, we should declare variable on begin of block (< C99) */
gen_fprintf(f, "\t%s _field_%s = %s(tvb, offset);\n", ctype, field->id, fetch_func);
}
if (size_sym) {
if (size_sym->type == SYMBOL_FIELD) {
struct _npl_statement_field *sym_field = size_sym->data;
xassert(sym_field->generate_var || f == NULL);
sym_field->generate_var = 1;
} else
fprintf(stderr, "::: %s (%d)\n", size_sym->id, size_sym->type);
hf_type = NULL;
} else
hf_type = type_to_ft(t, size);
field->hfi->hf_type = hf_type;
field->field_size = size;
/* XXX, when generate_var we can use fetched value, not proto_tree_add_item() */
#if 0
if (display_format)
fprintf(stderr, "XXX, format\n");
else
#endif
gen_fprintf(f, "\tproto_tree_add_item(tree, %s, tvb, offset, ", hfi_var(field->hfi));
/* XXX, emit temporary variable? expressions might be time-consuming, we could also check if size < 0 */
gen_field_size(f, size_sym, size);
gen_fprintf(f, ", %s);\n",
(byte_order == NPL_ENDIAN_LE) ? "ENC_LITTLE_ENDIAN" :
(byte_order == NPL_ENDIAN_BE) ? "ENC_BIG_ENDIAN" :
"ENC_NA");
gen_fprintf(f, "\toffset += ");
gen_field_size(f, size_sym, size);
gen_fprintf(f, ";\n");
symbols_pop(symroot);
}
static void
gen_statement_field(FILE *f, struct parent_info *parent, struct _npl_statement_field *field, npl_attribute_list_t *attr_list)
{
struct symbol *sym;
const char *property_name = NULL;
int property_flags = 0;
sym = symbol_find(field->t_id, SYMBOL_STRUCT | SYMBOL_PROTO | SYMBOL_TYPE);
if (!sym) {
fprintf(stderr, "can't find: %s\n", field->t_id);
abort();
}
sym->is_used = 1;
if (!field->hfi && sym->type != SYMBOL_PROTO) {
field->hfi = hfi_add(field, parent);
xassert(f == NULL);
}
symbol_add(field->id, SYMBOL_FIELD, field);
field->byte_order_attr = parent->byte_order;
/* already resolved */
while (attr_list) {
const char *attr_name = attr_list->resolved;
npl_expression_t *attr_expr = attr_list->assign_expr;
int attr_flags = attr_list->flags;
if (attr_name) {
if (!strcasecmp(attr_name, "DataFieldByteOrder")) {
xassert(attr_flags == 0);
xassert(attr_expr != NULL);
field->byte_order_attr = attr_expr;
} else if (attr_expr) {
if (attr_flags & ATTR_LOCAL) {
/* XXX, declare only when first use. support < C99 */
gen_fprintf(f, "\tTYPE _local_property_%s = ", attr_name);
gen_expr(f, attr_expr);
gen_fprintf(f, ";\n");
} else {
gen_fprintf(f, "<<PROPERTY(%d) %s = ", attr_flags, attr_name);
gen_expr(f, attr_expr);
gen_fprintf(f, ">>\n");
}
} else {
/* only one for now */
xassert(property_name == NULL);
property_name = attr_name;
property_flags = attr_flags;
field->generate_var = 1;
}
} else
fprintf(stderr, "!!! generating field attr: not resolved!\n");
attr_list = attr_list->next;
}
if (sym->type == SYMBOL_STRUCT)
gen_field_struct(f, field, sym->data);
else if (sym->type == SYMBOL_TYPE)
gen_field_type(f, field, sym->data);
else if (sym->type == SYMBOL_PROTO)
gen_field_proto(f, field, sym->data);
else {
/* XXX, SYMBOL_TABLE? */
fprintf(stderr, "%s: wrong type [%d]\n", sym->id, sym->type);
abort();
}
if (property_name) {
/* XXX */
gen_fprintf(f, "<<PROPERTY(%d) %s = FIELD %s>>\n", property_flags, property_name, field->id);
}
}
static void
gen_statement(FILE *f, struct parent_info *parent, npl_statement_t *st)
{
resolve_attr_list(st->attr_list);
switch (st->type) {
case STATEMENT_WHILE:
// XXX ->id
gen_fprintf(f, "\twhile (");
gen_expr(f, &st->w.expr);
gen_fprintf(f, ") {\n");
/* gen_fprintf(f, "\tconst int __while%d_offset = %d;\n", _while_id, offset); */
parent->cur_offset = -1;
gen_statements(f, parent, st->w.sts);
/* gen_fprintf(f, "\tassert(__while%d_offset > offset);\n", _while_id, offset); */
gen_fprintf(f, "\t}\n");
return;
case STATEMENT_STRUCT:
/* XXX, fix if we know size of structure */
parent->cur_offset = -1;
gen_struct(NULL, &st->s.data, NULL);
// XXX put st->s.data somewhere to create this proc.
gen_fprintf(f, "\toffset = dissect_struct_%s(tvb, pinfo, tree, hf_costam, offset);\n", st->s.data.tmpid);
return;
case STATEMENT_FIELD:
gen_statement_field(f, parent, &st->f, st->attr_list);
if (parent->cur_offset != -1) {
if (st->f.field_size != -1)
parent->cur_offset += st->f.field_size;
else
parent->cur_offset = -1;
}
return;
/* case STATEMENT_DYNAMIC_SWITCH: */
case STATEMENT_SWITCH:
{
struct npl_switch_case *c = st->sw.data.cases;
parent->cur_offset = -1;
if (st->sw.data.switch_expr) {
gen_fprintf(f, "\tswitch (");
gen_expr(f, st->sw.data.switch_expr);
gen_fprintf(f, ") {\n");
while (c) {
gen_fprintf(f, "\t\tcase ");
gen_expr(f, &c->e);
gen_fprintf(f, ":\n");
if (c->st) {
gen_fprintf(f, "\t\t");
gen_statement(f, parent, c->st);
gen_fprintf(f, "\t\t\tbreak;\n");
}
c = c->next;
}
if (st->sw.data.default_st) {
gen_fprintf(f, "\t\tdefault:\n");
gen_fprintf(f, "\t\t");
gen_statement(f, parent, st->sw.data.default_st);
}
gen_fprintf(f, "\t}\n");
return;
}
if (c) {
npl_statement_t *default_st = st->sw.data.default_st;
gen_fprintf(f, "\t");
while (c) {
npl_statement_t *case_st;
gen_fprintf(f, "if (");
gen_fprintf(f, "(");
gen_expr(f, &c->e);
gen_fprintf(f, ")");
case_st = c->st;
c = c->next;
while (c && !case_st) {
case_st = c->st;
gen_fprintf(f, " || ");
gen_fprintf(f, "(");
gen_expr(f, &c->e);
gen_fprintf(f, ")");
c = c->next;
}
if (!case_st) {
gen_fprintf(f, " || 1");
case_st = default_st;
default_st = NULL;
}
gen_fprintf(f, ") {\n");
gen_fprintf(f, "\t");
gen_statement(f, parent, case_st);
gen_fprintf(f, "\t} ");
if (c || default_st)
gen_fprintf(f, "else ");
}
if (default_st) {
gen_fprintf(f, "{\n");
gen_fprintf(f, "\t");
gen_statement(f, parent, default_st);
gen_fprintf(f, "\t}\n");
}
} else {
if (st->sw.data.default_st)
gen_statement(f, parent, st->sw.data.default_st);
}
return;
}
}
fprintf(stderr, "gen_statement: %d\n", st->type);
}
static void
gen_statements(FILE *f, struct parent_info *parent, struct _npl_statements *sts)
{
struct symbol *symroot;
symroot = symbols_push();
while (sts) {
gen_statement(f, parent, &sts->st);
sts = sts->next;
}
symbols_pop(symroot);
}
static void
decl_protocol(npl_protocol_t *p)
{
if (!p->sym)
p->sym = symbol_add(p->id, SYMBOL_PROTO, p);
}
static void
gen_protocol(FILE *f, npl_protocol_t *p, npl_attribute_list_t *attr_list)
{
struct parent_info this;
npl_expression_t *byte_order_attr = NULL;
p->sym->is_static = 1;
gen_fprintf(f,
"static int\n"
"dissect_%s(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void *data _U_)\n", p->id);
/* XXX, use data */
xassert(p->params.count == 0);
gen_fprintf(f, "{\n");
gen_fprintf(f,
"\tint offset = 0;\n"
"\tproto_tree *tree = NULL;\n"
"\tproto_item *ti = NULL;\n"
"\n"
);
resolve_attr_list(attr_list);
while (attr_list) {
const char *attr_name = attr_list->resolved;
npl_expression_t *attr_expr = attr_list->assign_expr;
int flags = attr_list->flags;
if (attr_name) {
if (!strcasecmp(attr_name, "DataTypeByteOrder")) {
xassert(flags == 0);
xassert(attr_expr != NULL);
byte_order_attr = attr_expr;
} else
fprintf(stderr, "!!! generating protocol attr: %s not handled!\n", attr_name);
} else
fprintf(stderr, "!!! generating protocol attr: not resolved!\n");
attr_list = attr_list->next;
}
gen_fprintf(f, "\tif (parent_tree) {\n");
if (p->format) {
/* TODO */
gen_fprintf(f, "\t\tti = proto_tree_add_protocol_format(parent_tree, proto_%s, tvb, offset, -1, ", p->id);
gen_fprintf(f, "\"TODO\"");
gen_expr(stderr, p->format);
gen_fprintf(f, ");\n");
} else
gen_fprintf(f, "\t\tti = proto_tree_add_item(parent_tree, proto_%s, tvb, offset, -1, ENC_NA);\n", p->id);
gen_fprintf(f, "\t\ttree = proto_item_add_subtree(ti, ett_%s);\n", p->id);
gen_fprintf(f, "\t}\n");
memset(&this, 0, sizeof(this));
this.id = p->id;
this.id = NULL;
this.byte_order = byte_order_attr;
gen_statements(f, &this, p->sts);
gen_fprintf(f, "\tproto_item_set_len(ti, offset);\n");
gen_fprintf(f, "\treturn offset;\n");
gen_fprintf(f, "}\n");
gen_fprintf(f, "\n");
}
static void
decl_struct(npl_struct_t *s)
{
if (!s->sym && s->id) {
s->tmpid = s->id;
s->sym = symbol_add(s->id, SYMBOL_STRUCT, s);
}
}
static void
gen_struct(FILE *f, npl_struct_t *s, npl_attribute_list_t *attr_list)
{
const char *id = s->tmpid;
struct parent_info this;
if (!id)
id = s->tmpid = s->id;
if (!id) {
static unsigned int _id = 0;
char tmp_id[32];
snprintf(tmp_id, sizeof(tmp_id), "_noname%u", ++_id);
id = s->tmpid = xstrdup(tmp_id);
xassert(f == NULL);
}
if (s->count_expr) {
/* TODO */
fprintf(stderr, "TODO: s->count_expr");
}
if (s->sym)
s->sym->is_static = 1;
gen_fprintf(f,
"static int\n"
"dissect_struct_%s(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int hf_index%s, int offset)\n"
"{\n", id, s->private ? " _U_" : "");
if (!s->private) {
gen_fprintf(f, "\tconst int org_offset = offset;\n");
gen_fprintf(f, "\tproto_tree *tree = NULL;\n");
gen_fprintf(f, "\tproto_item *ti = NULL;\n");
} else
gen_fprintf(f, "\tproto_tree *tree = parent_tree;\n");
gen_fprintf(f,"\n");
resolve_attr_list(attr_list);
while (attr_list) {
const char *attr_name = attr_list->resolved;
/*
npl_expression_t *attr_expr = attr_list->assign_expr;
int attr_flags = attr_list->flags;
*/
if (attr_name) {
fprintf(stderr, "!!! generating struct attr: %s!\n", attr_name);
} else
fprintf(stderr, "!!! generating struct attr: not resolved!\n");
attr_list = attr_list->next;
}
if (!s->private) {
/*
if (s->format) {
fprintf(stderr, "gen_struct() s->format: '");
gen_expr(stderr, s->format);
fprintf(stderr, "\n\n");
}
*/
if (!s->ett)
s->ett = ett_add(s);
gen_fprintf(f,
"\tif (parent_tree) {\n"
"\t\tti = proto_tree_add_bytes_format_value(parent_tree, hf_index, tvb, offset, %d, NULL, \"%s\");\n"
"\t\ttree = proto_item_add_subtree(ti, %s);\n"
"\t}\n", s->struct_size, "", ett_var(s->ett));
} else {
if (s->format)
fprintf(stderr, "s->private && s->format?\n");
}
memset(&this, 0, sizeof(this));
this.id = s->id;
gen_statements(f, &this, s->sts);
s->struct_size = this.cur_offset;
if (s->struct_size != -1) {
/* XXX, assert runtime s->struct_size == offset - org_offset (?) */
}
if (!s->private && s->struct_size == -1)
gen_fprintf(f, "\tproto_item_set_len(ti, offset - org_offset);\n");
if (s->struct_size == -1)
s->struct_size = 0;
gen_fprintf(f, "\treturn offset;\n");
gen_fprintf(f, "}\n");
gen_fprintf(f, "\n");
}
static void
decl_const(npl_const_t *c)
{
if (!c->sym)
c->sym = symbol_add(c->id, SYMBOL_EXPR, &c->expr);
}
#if 0
static void
gen_const(FILE *f, npl_const_t *c)
{
gen_fprintf(f, "#define %s ", c->id);
gen_expr(f, &c->expr);
gen_fprintf(f, "\n");
}
#endif
static void
decl_type(npl_type_t *t)
{
if (!t->sym)
t->sym = symbol_add(t->id, SYMBOL_TYPE, t);
}
static void
walk_decl(FILE *f, npl_decl_t *d, int full_run)
{
switch (d->type) {
case DECL_STRUCT:
decl_struct(&d->s.data);
if (!full_run)
return;
gen_struct(f, &d->s.data, d->attr_list);
return;
case DECL_TABLE:
xassert(d->attr_list == NULL);
decl_table(&d->t.data);
if (!full_run)
return;
gen_table(f, &d->t.data);
return;
case DECL_PROTOCOL:
decl_protocol(&d->p.data);
if (!full_run)
return;
gen_protocol(f, &d->p.data, d->attr_list);
return;
case DECL_CONST:
xassert(d->attr_list == NULL);
decl_const(&d->c.data);
if (!full_run)
return;
return;
case DECL_TYPE:
xassert(d->attr_list == NULL);
decl_type(&d->ty.data);
if (!full_run)
return;
return;
case DECL_INCLUDE:
xassert(d->attr_list == NULL);
/* done in parse_includes() */
return;
}
fprintf(stderr, "gen_decl() type: %d\n", d->type);
}
static void
walk_code(FILE *f, npl_code_t *c, int full_run)
{
struct _npl_decl_list *decl;
for (decl = c->decls; decl; decl = decl->next)
walk_decl(f, &decl->d, 0);
if (!full_run)
return;
for (decl = c->decls; decl; decl = decl->next)
walk_decl(f, &decl->d, full_run);
}
static void
parse_includes(npl_code_t *c)
{
struct _npl_decl_list *decl;
for (decl = c->decls; decl; decl = decl->next) {
if (decl->d.type == DECL_INCLUDE) {
const char *filename = decl->d.i.file;
FILE *f;
npl_code_t icode;
int parse_ok;
if (!(f = fopen(filename, "rb"))) {
fprintf(stderr, "can't open: %s\n", filename);
abort();
}
memset(&icode, 0, sizeof(icode));
parse_ok = npl_parse_file(&icode, f, filename);
fclose(f);
if (!parse_ok) {
fprintf(stderr, "can't parse %s\n", filename);
abort();
}
parse_includes(&icode);
walk_code(NULL, &icode, 0);
}
}
}
static void
gen_vars(FILE *f)
{
struct hfinfo *hfi;
struct ettinfo *ett;
for (hfi = hfs; hfi; hfi = hfi->next)
gen_fprintf(f, "static int %s = -1;\n", hfi_var(hfi));
gen_fprintf(f, "\n");
for (ett = etts; ett; ett = ett->next)
gen_fprintf(f, "static int %s = -1;\n", ett_var(ett));
gen_fprintf(f, "\n");
}
static void
gen_proto_register(FILE *f, const char *proto_name)
{
struct hfinfo *hfi;
struct ettinfo *ett;
gen_fprintf(f,
"void\n"
"proto_register_%s(void)\n"
"{\n", proto_name);
/* hf array */
gen_fprintf(f, "\tstatic hf_register_info hf[] = {\n");
for (hfi = hfs; hfi; hfi = hfi->next) {
gen_fprintf(f,
"\t\t{ &%s,\n"
"\t\t\t{ \"%s\", \"%s.%s\", %s, %s, NULL, 0x%.2x, NULL, HFILL }\n"
"\t\t},\n", hfi_var(hfi), hfi_name(hfi), proto_name, hfi_filter(hfi), hfi_type(hfi), hfi_display(hfi), hfi_mask(hfi) );
}
gen_fprintf(f, "\t};\n\n");
/* ett array */
gen_fprintf(f, "\tstatic gint *ett[] = {\n");
for (ett = etts; ett; ett = ett->next)
gen_fprintf(f, "\t\t&%s,\n", ett_var(ett));
gen_fprintf(f, "\t};\n\n");
gen_fprintf(f, "\tproto_%s = proto_register_protocol(\"%s\", \"%s\", \"%s\");\n\n", proto_name, proto_name, proto_name, proto_name);
gen_fprintf(f, "\tproto_register_field_array(proto_%s, hf, array_length(hf));\n", proto_name);
gen_fprintf(f, "\tproto_register_subtree_array(ett, array_length(ett));\n");
gen_fprintf(f, "}\n\n");
}
static void
gen_proto_handoff(FILE *f, const char *proto_name)
{
gen_fprintf(f,
"void\n"
"proto_reg_handoff_%s(void)\n"
"{\n", proto_name);
gen_fprintf(f, "\tdissector_handle_t %s_handle = create_dissector_handle(dissect_%s, proto_%s);\n", proto_name, proto_name, proto_name);
#if 0
dissector_add_uint("REG", XXX, %s_handle);
xml_handle = find_dissector("xml");
#endif
gen_fprintf(f, "}\n\n");
}
static const npl_protocol_t *
get_protocol(npl_code_t *code)
{
struct _npl_decl_list *decl;
for (decl = code->decls; decl; decl = decl->next) {
/* XXX, for now return first */
if (decl->d.type == DECL_PROTOCOL)
return &decl->d.p.data;
}
return NULL;
}
static void
merge_code(npl_code_t *code, npl_code_t *subcode)
{
struct _npl_decl_list **p = &code->decls;
while (*p)
p = &(*p)->next;
*p = subcode->decls;
}
/* XXX, move to checker.c */
static void
check_code(npl_code_t *code)
{
parse_includes(code);
walk_code(NULL, code, 1);
}
/* XXX, move to generator-c.c */
static void
generate_code(npl_code_t *code)
{
const npl_protocol_t *proto = get_protocol(code);
const char *proto_name = (proto) ? proto->id : "noname";
FILE *out;
struct symbol *sym;
out = fopen("/tmp/npl.c", "w");
/* includes */
gen_fprintf(out, "#include \"config.h\"\n");
gen_fprintf(out, "#include <glib.h>\n");
gen_fprintf(out, "#include <epan/packet.h>\n");
gen_fprintf(out, "\n");
/* declare forward (or extern) */
/* XXX, not enough to generate from table (like private structs) */
for (sym = symbols; sym; sym = sym->next) {
const char *sstatic = (sym->is_static) ? "static " : "";
if (!sym->is_used)
continue;
switch (sym->type) {
case SYMBOL_TABLE:
gen_fprintf(out, "%sconst char *format_table_%s(...);\n", sstatic, sym->id);
break;
case SYMBOL_STRUCT:
gen_fprintf(out, "%sint dissect_struct_%s(tvbuff_t *, packet_info *, proto_tree *, int, int);\n", sstatic, sym->id);
break;
case SYMBOL_PROTO:
gen_fprintf(out, "%sint dissect_%s(tvbuff_t *, packet_info *, proto_tree *, void *);\n", sstatic, sym->id);
break;
}
}
gen_fprintf(out, "\n");
gen_fprintf(out, "static int proto_%s = -1;\n", proto_name);
gen_fprintf(out, "static int ett_%s = -1;\n", proto_name);
gen_vars(out);
walk_code(out, code, 1);
gen_proto_register(out, proto_name);
gen_proto_handoff(out, proto_name);
fclose(out);
}
int main(int argc, char **argv) {
FILE *f;
npl_code_t code;
int i;
if (argc < 2) {
fprintf(stderr, "usage: %s filename\n", argv[0]);
return 1;
}
/* build-in expressions */
symbol_add("FrameOffset", SYMBOL_SIMPLE, "offset");
symbol_add("FrameData", SYMBOL_SIMPLE, "tvb");
symbol_add("this", SYMBOL_EXPR, &this_e);
/* built-in functions */
symbol_add("FormatString", SYMBOL_EXPR, &format_string_e);
symbol_add("IsValueNone", SYMBOL_EXPR, &is_value_none_e);
/* built-in structs (?) */
symbol_add("Property", SYMBOL_EXPR, &property_e); /* XXX, SYMBOL_STRUCT */
symbol_add("Global", SYMBOL_EXPR, &global_e); /* XXX, SYMBOL_STRUCT */
symbol_add("Local", SYMBOL_EXPR, &local_e); /* XXX, SYMBOL_STRUCT */
memset(&code, 0, sizeof(code));
for (i = 1; i < argc; i++) {
npl_code_t mcode;
int parse_ok;
if (!(f = fopen(argv[i], "rb"))) {
fprintf(stderr, "can't open: %s\n", argv[i]);
continue;
return 1;
}
memset(&mcode, 0, sizeof(mcode));
parse_ok = npl_parse_file(&mcode, f, argv[i]);
fclose(f);
if (!parse_ok) {
fprintf(stderr, "can't parse: %s\n", argv[i]);
return 1;
}
merge_code(&code, &mcode);
}
check_code(&code);
generate_code(&code);
return 0;
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/