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Generating checksums

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This commit is contained in:
Wolfgang (Blub) Bumiller 2012-10-02 17:09:49 +02:00
parent 9a1ec9aaa3
commit 354dd94b95
4 changed files with 73 additions and 3 deletions
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1
code.c
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@ -72,7 +72,6 @@ void code_init() {
prog_section_def empty_def = {0, 0, 0};
int i = 0;
code_crc = 0;
code_entfields = 0;
/* omit creation of null code */

4
gmqcc.h
View file

@ -210,7 +210,8 @@ void util_endianswap (void *, int, int);
size_t util_strtocmd (const char *, char *, size_t);
size_t util_strtononcmd (const char *, char *, size_t);
uint32_t util_crc32(const char *, int, register const short);
uint16_t util_crc16(const char *, int, const short);
uint32_t util_crc32(const char *, int, const short);
#ifdef NOTRACK
# define mem_a(x) malloc(x)
@ -512,6 +513,7 @@ VECTOR_PROT(prog_section_field, code_fields );
VECTOR_PROT(prog_section_function, code_functions );
VECTOR_PROT(int, code_globals );
VECTOR_PROT(char, code_chars );
extern uint16_t code_crc;
typedef float qcfloat;
typedef int32_t qcint;

69
parser.c
View file

@ -2899,6 +2899,73 @@ void parser_cleanup()
mem_d(parser);
}
extern const uint16_t util_crc16_table[];
static uint16_t stream_crc16(uint16_t old, const char *str)
{
printf("%s", str);
while (*str) {
old = (old<<8) ^ util_crc16_table[(old >> 8) ^ ((unsigned char)*str)];
++str;
}
return old;
}
static void generate_checksum(parser_t *parser)
{
uint16_t crc = 0xFFFF;
size_t i;
crc = stream_crc16(crc, "\n/* file generated by qcc, do not modify */\n\ntypedef struct\n{");
crc = stream_crc16(crc, "\tint\tpad[28];\n");
/*
crc = stream_crc16(crc, "\tint\tpad;\n");
crc = stream_crc16(crc, "\tint\tofs_return[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm0[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm1[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm2[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm3[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm4[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm5[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm6[3];\n");
crc = stream_crc16(crc, "\tint\tofs_parm7[3];\n");
*/
for (i = 0; i < parser->crc_globals; ++i) {
if (!ast_istype(parser->globals[i].var, ast_value))
continue;
switch (parser->globals[i].var->expression.vtype) {
case TYPE_FLOAT: crc = stream_crc16(crc, "\tfloat\t"); break;
case TYPE_VECTOR: crc = stream_crc16(crc, "\tvec3_t\t"); break;
case TYPE_STRING: crc = stream_crc16(crc, "\tstring_t\t"); break;
case TYPE_FUNCTION: crc = stream_crc16(crc, "\tfunc_t\t"); break;
default:
crc = stream_crc16(crc, "\tint\t");
break;
}
crc = stream_crc16(crc, parser->globals[i].name);
crc = stream_crc16(crc, ";\n");
}
crc = stream_crc16(crc, "} globalvars_t;\n\ntypedef struct\n{\n");
for (i = 0; i < parser->crc_fields; ++i) {
if (!ast_istype(parser->fields[i].var, ast_value))
continue;
switch (parser->fields[i].var->expression.next->expression.vtype) {
case TYPE_FLOAT: crc = stream_crc16(crc, "\tfloat\t"); break;
case TYPE_VECTOR: crc = stream_crc16(crc, "\tvec3_t\t"); break;
case TYPE_STRING: crc = stream_crc16(crc, "\tstring_t\t"); break;
case TYPE_FUNCTION: crc = stream_crc16(crc, "\tfunc_t\t"); break;
default:
crc = stream_crc16(crc, "\tint\t");
break;
}
crc = stream_crc16(crc, parser->fields[i].name);
crc = stream_crc16(crc, ";\n");
}
crc = stream_crc16(crc, "} entvars_t;\n\n");
printf("GOT CRC %u\n", crc);
code_crc = crc;
}
bool parser_finish(const char *output)
{
size_t i;
@ -2996,6 +3063,8 @@ bool parser_finish(const char *output)
if (opts_dump)
ir_builder_dump(ir, printf);
generate_checksum(parser);
if (!ir_builder_generate(ir, output)) {
printf("*** failed to generate output file\n");
ir_builder_delete(ir);

2
util.c
View file

@ -285,7 +285,7 @@ static const uint32_t util_crc32_table[] = {
0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};
static const uint16_t util_crc16_table[] = {
const uint16_t util_crc16_table[] = {
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5,
0x60C6, 0x70E7, 0x8108, 0x9129, 0xA14A, 0xB16B,
0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231, 0x0210,