qc_program_t* prog_load(const char *filename, bool skipversion)
{
prog_header_t header;
qc_program_t *prog;
FILE *file = fopen(filename, "rb");
/* we need all those in order to support INSTR_STATE: */
bool has_self = false,
has_time = false,
has_think = false,
has_nextthink = false,
has_frame = false;
if (!file)
return nullptr;
if (fread(&header, sizeof(header), 1, file) != 1) {
loaderror("failed to read header from '%s'", filename);
fclose(file);
return nullptr;
}
util_swap_header(header);
if (!skipversion && header.version != 6) {
loaderror("header says this is a version %i progs, we need version 6\n", header.version);
fclose(file);
return nullptr;
}
prog = (qc_program_t*)mem_a(sizeof(qc_program_t));
if (!prog) {
fclose(file);
fprintf(stderr, "failed to allocate program data\n");
return nullptr;
}
memset(prog, 0, sizeof(*prog));
prog->entityfields = header.entfield;
prog->crc16 = header.crc16;
prog->filename = util_strdup(filename);
if (!prog->filename) {
loaderror("failed to store program name");
goto error;
}
#define read_data(hdrvar, progvar, reserved) \
if (fseek(file, header.hdrvar.offset, SEEK_SET) != 0) { \
loaderror("seek failed"); \
goto error; \
} \
prog->progvar.resize(header.hdrvar.length + reserved); \
if (fread( \
&prog->progvar[0], \
sizeof(prog->progvar[0]), \
header.hdrvar.length, \
file \
)!= header.hdrvar.length \
) { \
loaderror("read failed"); \
goto error; \
}
#define read_data1(x) read_data(x, x, 0)
#define read_data2(x, y) read_data(x, x, y)
read_data (statements, code, 0);
read_data1(defs);
read_data1(fields);
read_data1(functions);
read_data1(strings);
read_data2(globals, 2); /* reserve more in case a RETURN using with the global at "the end" exists */
util_swap_statements(prog->code);
util_swap_defs_fields(prog->defs);
util_swap_defs_fields(prog->fields);
util_swap_functions(prog->functions);
util_swap_globals(prog->globals);
fclose(file);
/* profile counters */
memset(vec_add(prog->profile, prog->code.size()), 0, sizeof(prog->profile[0]) * prog->code.size());
/* Add tempstring area */
prog->tempstring_start = prog->strings.size();
prog->tempstring_at = prog->strings.size();
prog->strings.resize(prog->strings.size() + 16*1024, '\0');
/* spawn the world entity */
vec_push(prog->entitypool, true);
memset(vec_add(prog->entitydata, prog->entityfields), 0, prog->entityfields * sizeof(prog->entitydata[0]));
prog->entities = 1;
/* cache some globals and fields from names */
for (auto &it : prog->defs) {
const char *name = prog_getstring(prog, it.name);
if (!strcmp(name, "self")) {
prog->cached_globals.self = it.offset;
has_self = true;
}
else if (!strcmp(name, "time")) {
prog->cached_globals.time = it.offset;
has_time = true;
}
}
for (auto &it : prog->fields) {
const char *name = prog_getstring(prog, it.name);
if (!strcmp(name, "think")) {
prog->cached_fields.think = it.offset;
has_think = true;
}
else if (!strcmp(name, "nextthink")) {
prog->cached_fields.nextthink = it.offset;
has_nextthink = true;
}
else if (!strcmp(name, "frame")) {
prog->cached_fields.frame = it.offset;
has_frame = true;
}
}
if (has_self && has_time && has_think && has_nextthink && has_frame)
prog->supports_state = true;
return prog;
error:
if (prog->filename)
mem_d(prog->filename);
vec_free(prog->entitydata);
vec_free(prog->entitypool);
mem_d(prog);
fclose(file);
return nullptr;
}
qc_program* prog_load(const char *filename)
{
qc_program *prog;
prog_header header;
FILE *file;
file = util_fopen(filename, "rb");
if (!file)
return NULL;
if (fread(&header, sizeof(header), 1, file) != 1) {
loaderror("failed to read header from '%s'", filename);
fclose(file);
return NULL;
}
if (header.version != 6) {
loaderror("header says this is a version %i progs, we need version 6\n", header.version);
fclose(file);
return NULL;
}
prog = (qc_program*)mem_a(sizeof(qc_program));
if (!prog) {
fclose(file);
printf("failed to allocate program data\n");
return NULL;
}
memset(prog, 0, sizeof(*prog));
prog->entityfields = header.entfield;
prog->crc16 = header.crc16;
prog->filename = util_strdup(filename);
if (!prog->filename) {
loaderror("failed to store program name");
goto error;
}
#define read_data(hdrvar, progvar, reserved) \
if (fseek(file, header.hdrvar.offset, SEEK_SET) != 0) { \
loaderror("seek failed"); \
goto error; \
} \
if (fread(vec_add(prog->progvar, header.hdrvar.length + reserved), \
sizeof(*prog->progvar), \
header.hdrvar.length, file) \
!= header.hdrvar.length) \
{ \
loaderror("read failed"); \
goto error; \
}
#define read_data1(x) read_data(x, x, 0)
#define read_data2(x, y) read_data(x, x, y)
read_data (statements, code, 0);
read_data1(defs);
read_data1(fields);
read_data1(functions);
read_data1(strings);
read_data2(globals, 2); /* reserve more in case a RETURN using with the global at "the end" exists */
fclose(file);
/* profile counters */
memset(vec_add(prog->profile, vec_size(prog->code)), 0, sizeof(prog->profile[0]) * vec_size(prog->code));
/* Add tempstring area */
prog->tempstring_start = vec_size(prog->strings);
prog->tempstring_at = vec_size(prog->strings);
memset(vec_add(prog->strings, 16*1024), 0, 16*1024);
/* spawn the world entity */
vec_push(prog->entitypool, true);
memset(vec_add(prog->entitydata, prog->entityfields), 0, prog->entityfields * sizeof(prog->entitydata[0]));
prog->entities = 1;
return prog;
error:
if (prog->filename)
mem_d(prog->filename);
vec_free(prog->code);
vec_free(prog->defs);
vec_free(prog->fields);
vec_free(prog->functions);
vec_free(prog->strings);
vec_free(prog->globals);
vec_free(prog->entitydata);
vec_free(prog->entitypool);
mem_d(prog);
return NULL;
}