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vm.c
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vm.c
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#define QCVM_INTERNAL
#include "shared/shared.h"
#include "vm.h"
#include "vm_game.h"
#include "vm_math.h"
#include "vm_debug.h"
#include "vm_mem.h"
#include "vm_string.h"
#include "vm_ext.h"
#include "vm_file.h"
#include "vm_hash.h"
#include "vm_structlist.h"
#include "vm_list.h"
#include "vm_heap.h"
#include "vm_opcodes.h"
#include <time.h>
typedef struct
{
uint32_t offset;
uint32_t size;
} qcvm_offset_t;
enum
{
PROGS_Q1 = 6,
PROGS_FTE = 7,
PROG_SECONDARYVERSION16 = ((('1'<<0)|('F'<<8)|('T'<<16)|('E'<<24))^(('P'<<0)|('R'<<8)|('O'<<16)|('G'<<24))),
PROG_SECONDARYVERSION32 = ((('1'<<0)|('F'<<8)|('T'<<16)|('E'<<24))^(('3'<<0)|('2'<<8)|('B'<<16)|(' '<<24)))
};
typedef uint32_t progs_version_t;
typedef struct
{
progs_version_t version;
uint16_t crc;
uint16_t skip;
struct {
qcvm_offset_t statement;
qcvm_offset_t definition;
qcvm_offset_t field;
qcvm_offset_t function;
qcvm_offset_t string;
qcvm_offset_t globals;
} sections;
uint32_t entityfields;
uint32_t ofs_files; //non list format. no comp
uint32_t ofs_linenums; //numstatements big //comp 64
qcvm_offset_t bodylessfuncs;
qcvm_offset_t types;
uint32_t blockscompressed;
progs_version_t secondary_version;
} qcvm_header_t;
static inline void qcvm_stack_needs_resize(qcvm_stack_t *stack)
{
qcvm_string_backup_t *old_ref_strings = stack->ref_strings;
stack->ref_strings_allocated += STACK_STRINGS_RESERVE;
stack->ref_strings = (qcvm_string_backup_t *)(qcvm_alloc(stack->vm, sizeof(qcvm_string_backup_t) * stack->ref_strings_allocated));
if (old_ref_strings)
{
memcpy(stack->ref_strings, old_ref_strings, sizeof(qcvm_string_backup_t) * stack->ref_strings_size);
qcvm_mem_free(stack->vm, old_ref_strings);
}
#ifdef _DEBUG
if (stack->ref_strings_allocated != STACK_STRINGS_RESERVE)
qcvm_debug(stack->vm, "Stack string count extended to %i\n", stack->ref_strings_allocated);
#endif
}
void qcvm_stack_push_ref_string(qcvm_stack_t *stack, const qcvm_string_backup_t ref_string)
{
if (stack->ref_strings_size == stack->ref_strings_allocated)
qcvm_stack_needs_resize(stack);
stack->ref_strings[stack->ref_strings_size++] = ref_string;
}
qcvm_builtin_t qcvm_builtin_list_get(qcvm_t *vm, const qcvm_func_t func)
{
assert(func < 0);
const int32_t index = (-func) - 1;
assert(index < vm->builtins.count);
return vm->builtins.list[index];
}
void qcvm_builtin_list_register(qcvm_t *vm, const char *name, qcvm_builtin_t builtin)
{
qcvm_builtin_list_t *list = &vm->builtins;
for (qcvm_function_t *func = vm->functions; func < vm->functions + vm->functions_size; func++)
{
if (func->id || func->name_index == STRING_EMPTY)
continue;
if (strcmp(qcvm_get_string(vm, func->name_index), name) == 0)
{
if (list->registered == list->count)
qcvm_error(vm, "Builtin list overrun");
const int32_t index = (int32_t) list->registered;
func->id = (qcvm_func_t)(-(index + 1));
list->list[index] = builtin;
list->registered++;
return;
}
}
qcvm_debug(vm, "No builtin to assign to %s\n", name);
}
void qcvm_register_system_field(qcvm_t *vm, const char *field_name, const size_t field_offset, const size_t field_span)
{
qcvm_definition_t *def = qcvm_find_definition(vm, field_name, TYPE_FIELD);
if (!def)
{
qcvm_debug(vm, "field definition not found for mapping: %s\n", field_name);
return;
}
qcvm_definition_t *field = qcvm_find_field(vm, field_name);
if (!field)
{
qcvm_debug(vm, "field not found for mapping: %s\n", field_name);
return;
}
if (vm->system_fields_size == vm->fields_size)
qcvm_error(vm, "system fields overrun");
if ((field_offset + field_span) > vm->system_edict_size)
qcvm_error(vm, "system fields overrun");
qcvm_system_field_t *system_field = &vm->system_fields[vm->system_fields_size++];
system_field->def = def;
system_field->field = field;
system_field->offset = (qcvm_global_t) field_offset;
system_field->span = field_span;
}
const char *qcvm_parse_format(const qcvm_string_t formatid, const qcvm_t *vm, const uint8_t start)
{
typedef enum
{
PT_NONE,
PT_SPECIFIER,
PT_SKIP
} ParseToken;
static char buffer[0x800];
size_t i = 0;
const size_t len = qcvm_get_string_length(vm, formatid);
static char format_buffer[17];
uint8_t param_index = start;
const char *format = qcvm_get_string(vm, formatid);
char *p = buffer;
size_t len_left = sizeof(buffer) - 1;
while (true)
{
const char *next = strchr(format + i, '%');
if (!next)
{
const size_t write_len = (format + len) - (format + i);
if (len_left < write_len)
qcvm_error(vm, "qcvm_parse_format overflow");
strncpy(p, format + i, write_len);
p += write_len;
len_left -= write_len;
break;
}
size_t write_len = (next - format) - i;
if (len_left < write_len)
qcvm_error(vm, "qcvm_parse_format overflow");
strncpy(p, format + i, write_len);
p += write_len;
len_left -= write_len;
i = next - format;
const char *specifier_start = next;
ParseToken state = PT_NONE;
while (state < PT_SPECIFIER)
{
next++;
i++;
// check specifier
switch (*next)
{
case 'd':
case 'i':
case 'o':
case 'x':
case 'X':
case 'f':
case 'F':
case 'e':
case 'E':
case 'g':
case 'G':
case 'a':
case 'A':
case 'c':
case 's':
case 'p':
state = PT_SPECIFIER;
continue;
case '%':
if (len_left < 1)
qcvm_error(vm, "qcvm_parse_format overflow");
*p = '%';
p++;
len_left--;
state = PT_SKIP;
continue;
}
}
if (state == PT_SPECIFIER)
{
Q_strlcpy(format_buffer, specifier_start, minsz(sizeof(format_buffer), (size_t)((next - specifier_start) + 1 + 1)));
const char *formatted;
switch (*next)
{
case 'd':
case 'i':
case 'o':
case 'x':
case 'X':
case 'c':
case 'p':
formatted = qcvm_temp_format(vm, format_buffer, qcvm_argv_int32(vm, param_index++));
break;
case 'f':
case 'F':
case 'e':
case 'E':
case 'g':
case 'G':
case 'a':
case 'A':
formatted = qcvm_temp_format(vm, format_buffer, qcvm_argv_float(vm, param_index++));
break;
case 's':
formatted = qcvm_temp_format(vm, format_buffer, qcvm_argv_string(vm, param_index++));
break;
default:
qcvm_error(vm, "invalid specifier");
}
write_len = strlen(formatted);
if (len_left < write_len)
qcvm_error(vm, "qcvm_parse_format overflow");
strncpy(p, formatted, write_len);
p += write_len;
len_left -= write_len;
}
i++;
}
*p = 0;
return buffer;
}
static void qcvm_field_wrap_list_init(qcvm_t *vm)
{
vm->field_wraps = (qcvm_field_wrapper_t *)qcvm_alloc(vm, sizeof(qcvm_field_wrapper_t) * vm->field_real_size);
}
void qcvm_field_wrap_list_register(qcvm_t *vm, const char *field_name, const size_t field_offset, const size_t struct_offset, qcvm_field_setter_t setter)
{
for (qcvm_definition_t *f = vm->fields; f < vm->fields + vm->fields_size; f++)
{
if (f->name_index == STRING_EMPTY)
continue;
else if (strcmp(qcvm_get_string(vm, f->name_index), field_name))
continue;
assert((f->global_index + field_offset) < vm->field_real_size);
qcvm_field_wrapper_t *wrapper = &vm->field_wraps[f->global_index + field_offset];
*wrapper = (qcvm_field_wrapper_t) {
f,
f->global_index + field_offset,
strncmp(field_name, "client.", 7) == 0,
struct_offset,
setter
};
return;
}
vm->warning("QCVM WARNING: can't find field %s in progs\n", field_name);
}
void qcvm_field_wrap_list_check_set(qcvm_t *vm, const void *ptr, const size_t span)
{
// FIXME: this shouldn't be required ideally...
if (!vm)
return;
START_TIMER(vm, WrapApply);
// no entities involved in this wrap check (or no entities to check yet)
if (ptr < vm->edicts || ptr >= (void *)((uint8_t *)vm->edicts + (vm->edict_size * vm->max_edicts)))
{
END_TIMER(vm, PROFILE_TIMERS);
return;
}
// check where we're starting
void *start = (void *)((uint8_t *)ptr - (uint8_t *)vm->edicts);
edict_t *ent = (edict_t *)qcvm_itoe(vm, (int32_t)((ptrdiff_t)start / vm->edict_size));
size_t offset = (const uint32_t *)ptr - (uint32_t *)ent;
const int32_t *sptr = (const int32_t *)ptr;
for (size_t i = 0; i < span; i++, sptr++, offset++)
{
// we're wrapping over to a new entity
if (offset >= vm->field_real_size)
{
ent++;
offset = 0;
}
const qcvm_field_wrapper_t *wrap = &vm->field_wraps[offset];
if (!wrap->field)
continue;
if (wrap->field_offset != offset)
continue;
// client wraps may attempt to write to them on non-clients
// during memcpy, etc
if (wrap->is_client && !ent->client)
continue;
void *dst = (void *)(((wrap->is_client) ? (uint8_t *)ent->client : (uint8_t *)ent) + wrap->struct_offset);
if (wrap->setter)
wrap->setter(dst, sptr);
else
*(int32_t *)dst = *sptr;
}
END_TIMER(vm, PROFILE_TIMERS);
}
static void qcvm_state_init(qcvm_state_t *state, qcvm_t *vm)
{
state->vm = vm;
state->current = -1;
}
static void qcvm_state_free(qcvm_state_t *state)
{
for (int32_t i = 0; i < state->stack_allocated; i++)
{
qcvm_mem_free(state->vm, state->stack[i].locals);
qcvm_mem_free(state->vm, state->stack[i].ref_strings);
}
qcvm_mem_free(state->vm, state->stack);
}
void qcvm_state_needs_resize(qcvm_state_t *state)
{
qcvm_stack_t *old_stack = state->stack;
state->stack_allocated += STACK_RESERVE;
state->stack = (qcvm_stack_t *)qcvm_alloc(state->vm, sizeof(qcvm_stack_t) * state->stack_allocated);
if (old_stack)
{
memcpy(state->stack, old_stack, sizeof(qcvm_stack_t) * state->current);
qcvm_mem_free(state->vm, old_stack);
}
for (int32_t i = state->current; i < state->stack_allocated; i++)
{
qcvm_stack_t *new_stack = state->stack + i;
new_stack->vm = state->vm;
new_stack->locals = (qcvm_global_t *)qcvm_alloc(state->vm, sizeof(qcvm_global_t) * state->vm->highest_stack);
qcvm_stack_needs_resize(new_stack);
}
if (state->stack_allocated != STACK_RESERVE)
qcvm_debug(state->vm, "Stack size increased to %i\n", state->stack_allocated);
}
qcvm_stack_t *qcvm_state_stack_push(qcvm_state_t *state)
{
state->current++;
if ((size_t)state->current == state->stack_allocated)
qcvm_state_needs_resize(state);
return &state->stack[state->current];
}
void qcvm_state_stack_pop(qcvm_state_t *state)
{
if (state->current <= -1)
qcvm_error(state->vm, "stack underflow");
state->current--;
}
static void qcvm_init(qcvm_t *vm)
{
qcvm_state_init(&vm->state, vm);
Q_srand((uint32_t)time(NULL));
}
static void qcvm_free(qcvm_t *vm)
{
qcvm_mem_free(vm, vm->string_hashes);
qcvm_mem_free(vm, vm->string_hashes_data);
qcvm_state_free(&vm->state);
}
void qcvm_error(const qcvm_t *vm, const char *format, ...)
{
va_list argptr;
static char buffer[512];
va_start(argptr, format);
vsnprintf(buffer, sizeof(buffer), format, argptr);
va_end(argptr);
// this breaks const-correctness, but since this is for debugging I think it's
// fine.
#if ALLOW_DEBUGGING
qcvm_break_on_current_statement((qcvm_t *)vm);
#ifdef WINDOWS
__debugbreak();
#endif
#endif
vm->error(buffer);
}
#ifdef _DEBUG
void qcvm_debug(const qcvm_t *vm, const char *format, ...)
{
va_list argptr;
static char buffer[512];
va_start(argptr, format);
vsnprintf(buffer, sizeof(buffer), format, argptr);
va_end(argptr);
vm->debug_print(buffer);
}
#ifdef _DEBUG
static const char *qcvm_function_for_local(qcvm_t *vm, const qcvm_global_t local)
{
qcvm_global_t closest = -1;
qcvm_function_t *closest_func = NULL;
for (qcvm_function_t *func = vm->functions; func < vm->functions + vm->functions_size; func++)
{
if (local < func->first_arg)
continue;
else if (local == func->first_arg)
{
closest_func = func;
break;
}
else if ((local - func->first_arg) < closest)
{
closest = (local - func->first_arg);
closest_func = func;
}
}
if (closest_func && closest_func->name_index)
return qcvm_get_string(vm, closest_func->name_index);
return NULL;
}
const char *qcvm_dump_pointer(qcvm_t *vm, const qcvm_global_t *ptr)
{
if (ptr >= vm->global_data && ptr < (vm->global_data + vm->global_size))
{
const qcvm_global_t offset = (qcvm_global_t)(ptr - vm->global_data);
qcvm_global_t closest = -1;
qcvm_definition_t *closest_def = NULL;
for (qcvm_definition_t *def = vm->definitions; def < vm->definitions + vm->definitions_size; def++)
{
if (def->global_index == offset)
{
closest = def->global_index;
closest_def = def;
break;
}
else if (def->global_index < offset)
{
if ((offset - def->global_index) < closest)
{
closest = offset - def->global_index;
closest_def = def;
}
}
}
if (closest == -1 || !closest_def || !closest_def->name_index)
return qcvm_temp_format(vm, "global %u", offset);
const char *func = qcvm_function_for_local(vm, offset);
if (func)
return qcvm_temp_format(vm, "global %s::%s + %u[%u]", func, qcvm_get_string(vm, closest_def->name_index), closest, offset);
return qcvm_temp_format(vm, "global %s + %u[%u]", qcvm_get_string(vm, closest_def->name_index), closest, offset);
}
else if (ptr >= (qcvm_global_t *)vm->edicts && ptr < (qcvm_global_t *)vm->edicts + (vm->edict_size * vm->max_edicts))
{
const edict_t *ent = qcvm_ent_to_entity(vm, (qcvm_ent_t)ptr, false);
const qcvm_global_t field_offset = (qcvm_global_t)(ptr - (qcvm_global_t *)ent);
if (field_offset < vm->field_real_size)
{
const qcvm_definition_t *def = vm->field_map_by_id[field_offset];
size_t offset;
for (offset = 0; !def; def = vm->field_map_by_id[field_offset - (++offset)]) ;
if (def)
{
if (offset)
return qcvm_temp_format(vm, "field %u::%s + %u[%u]", ent->s.number, qcvm_get_string(vm, def->name_index), offset, field_offset);
return qcvm_temp_format(vm, "field %u::%s[%u]", ent->s.number, qcvm_get_string(vm, def->name_index), field_offset);
}
}
return qcvm_temp_format(vm, "field %u::%u ???", ent->s.number, field_offset);
}
return "???";
}
#endif
#endif
qcvm_global_t *qcvm_get_global(qcvm_t *vm, const qcvm_global_t g)
{
#if ALLOW_INSTRUMENTING
if ((vm->profiling.flags & PROFILE_FIELDS) && vm->state.current >= 0 && vm->state.stack[vm->state.current].profile)
vm->state.stack[vm->state.current].profile->fields[NumGlobalsFetched][vm->profiling.mark]++;
#endif
return vm->global_data + g;
}
const qcvm_global_t *qcvm_get_const_global(const qcvm_t *vm, const qcvm_global_t g)
{
#if ALLOW_INSTRUMENTING
if ((vm->profiling.flags & PROFILE_FIELDS) && vm->state.current >= 0 && vm->state.stack[vm->state.current].profile)
vm->state.stack[vm->state.current].profile->fields[NumGlobalsFetched][vm->profiling.mark]++;
#endif
return vm->global_data + g;
}
void *qcvm_get_global_ptr(qcvm_t *vm, const qcvm_global_t global, const size_t value_size)
{
const qcvm_pointer_t pointer = *(const qcvm_pointer_t*)qcvm_get_const_global(vm, global);
assert((value_size % 4) == 0);
void *address;
if (!qcvm_resolve_pointer(vm, pointer, false, value_size, &address))
qcvm_error(vm, "bad address");
return address;
}
void qcvm_set_global(qcvm_t *vm, const qcvm_global_t global, const void *value, const size_t value_size)
{
#if ALLOW_INSTRUMENTING
if ((vm->profiling.flags & PROFILE_FIELDS) && vm->state.current >= 0 && vm->state.stack[vm->state.current].profile)
vm->state.stack[vm->state.current].profile->fields[NumGlobalsSet][vm->profiling.mark]++;
#endif
if (global == GLOBAL_NULL)
qcvm_error(vm, "attempt to overwrite 0");
assert((value_size % 4) == 0);
void *dst = qcvm_get_global(vm, global);
memcpy(dst, value, value_size);
qcvm_string_list_check_ref_unset(vm, dst, value_size / sizeof(qcvm_global_t), false);
qcvm_field_wrap_list_check_set(vm, dst, value_size / sizeof(qcvm_global_t));
}
// safe way of copying globals between other globals
void qcvm_copy_globals(qcvm_t *vm, const qcvm_global_t dst, const qcvm_global_t src, const size_t size)
{
const size_t span = size / sizeof(qcvm_global_t);
const void *src_ptr = qcvm_get_global(vm, src);
void *dst_ptr = qcvm_get_global(vm, dst);
memcpy(dst_ptr, src_ptr, size);
qcvm_string_list_mark_refs_copied(vm, src_ptr, dst_ptr, span);
qcvm_field_wrap_list_check_set(vm, dst_ptr, span);
}
const char *qcvm_stack_entry(const qcvm_t *vm, const qcvm_stack_t *s, const bool compact)
{
if (!vm->linenumbers)
return "dunno:dunno";
if (!s->function)
return "C code";
const char *func = qcvm_get_string(vm, s->function->name_index);
if (!*func)
func = "dunno";
const char *file = qcvm_get_string(vm, s->function->file_index);
if (!*file)
file = "dunno.qc";
if (compact)
return qcvm_temp_format(vm, "%s:%i", func, qcvm_line_number_for(vm, s->statement));
return qcvm_temp_format(vm, "%s (%s:%i @ stmt %u)", func, file, qcvm_line_number_for(vm, s->statement), s->statement - vm->statements);
}
const char *qcvm_stack_trace(const qcvm_t *vm, const bool compact)
{
const char *str = compact ? "" : "> ";
for (qcvm_stack_t *s = vm->state.stack; s <= &vm->state.stack[vm->state.current] && s->function; s++)
{
if (compact)
str = qcvm_temp_format(vm, "%s->%s", str, qcvm_stack_entry(vm, s, compact));
else
str = qcvm_temp_format(vm, "%s%s\n", str, qcvm_stack_entry(vm, s, compact));
}
return str;
}
qcvm_definition_t *qcvm_find_definition(qcvm_t *vm, const char *name, const qcvm_deftype_t type)
{
qcvm_definition_hash_t *hashed = vm->definition_hashes[Q_hash_string(name, vm->definitions_size)];
for (; hashed; hashed = hashed->hash_next)
if ((hashed->def->id & ~TYPE_GLOBAL) == type && !strcmp(qcvm_get_string(vm, hashed->def->name_index), name))
break;
if (hashed)
return hashed->def;
return NULL;
}
qcvm_definition_t *qcvm_find_field(qcvm_t *vm, const char *name)
{
qcvm_definition_hash_t *hashed = vm->field_hashes[Q_hash_string(name, vm->fields_size)];
for (; hashed; hashed = hashed->hash_next)
if (!strcmp(qcvm_get_string(vm, hashed->def->name_index), name))
break;
if (hashed)
return hashed->def;
return NULL;
}
#if ALLOW_DEBUGGING
static qcvm_evaluated_t qcvm_value_from_ptr(const qcvm_definition_t *def, const void *ptr)
{
switch (def->id & ~TYPE_GLOBAL)
{
default:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_VOID } };
case TYPE_STRING:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_STRING, .value.str = *(const qcvm_string_t *)(ptr) } };
case TYPE_FLOAT:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_FLOAT, .value.flt = *(const vec_t *)(ptr) } };
case TYPE_VECTOR:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_VECTOR, .value.vec = *(const vec3_t *)(ptr) } };
case TYPE_ENTITY:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_ENTITY, .value.ent = *(const qcvm_ent_t *)(ptr) } };
case TYPE_FIELD:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_FIELD, .value.fld = *(const int32_t *)(ptr) } };
case TYPE_FUNCTION:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_FUNCTION, .value.fnc = *(const qcvm_func_t *)(ptr) } };
case TYPE_POINTER:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_POINTER, .value.ptr = *(const qcvm_pointer_t *)(ptr) } };
case TYPE_INTEGER:
return (qcvm_evaluated_t) { def->global_index, .variant = { .type = TYPE_INTEGER, .value.itg = *(const int32_t *)(ptr) } };
}
}
static qcvm_evaluated_t qcvm_value_from_global(qcvm_t *vm, const qcvm_definition_t *def)
{
return qcvm_value_from_ptr(def, qcvm_get_global(vm, def->global_index));
}
static qcvm_evaluated_t qcvm_evaluate_from_local_or_global(qcvm_t *vm, const char *variable)
{
// we don't have a . so we're just checking for a base object.
// check locals
if (vm->state.current >= 0 && vm->state.stack[vm->state.current].function)
{
qcvm_stack_t *current = &vm->state.stack[vm->state.current];
size_t i;
qcvm_global_t g;
for (i = 0, g = current->function->first_arg; i < current->function->num_args_and_locals; i++, g++)
{
qcvm_definition_t *def = vm->definition_map_by_id[g];
if (!def || def->name_index == STRING_EMPTY || strcmp(variable, qcvm_get_string(vm, def->name_index)))
continue;
return qcvm_value_from_global(vm, def);
}
}
// no locals, so we can check all the globals
for (qcvm_definition_t *def = vm->definitions; def < vm->definitions + vm->definitions_size; def++)
{
if (def->name_index == STRING_EMPTY || strcmp(variable, qcvm_get_string(vm, def->name_index)))
continue;
return qcvm_value_from_global(vm, def);
}
return (qcvm_evaluated_t) { 0, .variant = { .type = TYPE_VOID } };
}
qcvm_evaluated_t qcvm_evaluate(qcvm_t *vm, const char *variable)
{
const char *dot = strchr(variable, '.');
if (dot)
{
char evaluate_left[MAX_INFO_STRING];
strncpy(evaluate_left, variable, dot - variable);
evaluate_left[dot - variable] = 0;
// we have a . so we're either a entity, pointer or struct...
qcvm_evaluated_t left_hand = qcvm_evaluate_from_local_or_global(vm, evaluate_left);
if (left_hand.variant.type == TYPE_ENTITY)
{
const char *right_context = dot + 1;
const qcvm_ent_t ent = left_hand.variant.value.ent;
if (ent == ENT_INVALID)
return left_hand;
const qcvm_definition_t *field = NULL;
for (qcvm_definition_t *f = vm->fields; f < vm->fields + vm->fields_size; f++)
{
if (f->name_index == STRING_EMPTY || strcmp(qcvm_get_string(vm, f->name_index), right_context))
continue;
field = f;
break;
}
if (!field)
return (qcvm_evaluated_t) { 0, .variant = { .type = TYPE_VOID } };
void *ptr;
if (!qcvm_resolve_pointer(vm, qcvm_get_entity_field_pointer(vm, qcvm_ent_to_entity(vm, ent, false), (int32_t)field->global_index), true, qcvm_type_size(field->id), &ptr))
qcvm_error(vm, "bad pointer");
return qcvm_value_from_ptr(field, ptr);
}
}
return qcvm_evaluate_from_local_or_global(vm, variable);
}
void qcvm_set_breakpoint(qcvm_t *vm, const bool is_set, const char *file, const int line)
{
qcvm_string_t id;
if (!qcvm_find_string(vm, file, &id))
{
qcvm_debug(vm, "Can't toggle breakpoint: can't find file %s in table\n", file);
return;
}
for (qcvm_function_t *function = vm->functions; function < vm->functions + vm->functions_size; function++)
{
if (function->id <= 0 || function->file_index != id)
continue;
for (qcvm_statement_t *statement = &vm->statements[function->id]; statement->opcode != OP_DONE; statement++)
{
if (qcvm_line_number_for(vm, statement) != line)
continue;
// got it
if (is_set)
statement->opcode |= OP_BREAKPOINT;
else
statement->opcode &= ~OP_BREAKPOINT;
qcvm_debug(vm, "Breakpoint set @ %s:%i\n", file, line);
return;
}
}
qcvm_debug(vm, "Can't toggle breakpoint: can't find %s:%i\n", file, line);
}
void qcvm_break_on_current_statement(qcvm_t *vm)
{
if (!vm->debug.attached)
return;
qcvm_stack_t *current = &vm->state.stack[vm->state.current];
qcvm_send_debugger_command(vm, qcvm_temp_format(vm, "qcstep \"%s\":%i\n", qcvm_get_string(vm, current->function->file_index), qcvm_line_number_for(vm, current->statement)));
vm->debug.state = DEBUG_BROKE;
vm->debug.step_function = current->function;
vm->debug.step_statement = current->statement;
vm->debug.step_depth = vm->state.current;
qcvm_wait_for_debugger_commands(vm);
}
#endif
int qcvm_line_number_for(const qcvm_t *vm, const qcvm_statement_t *statement)
{
if (vm->linenumbers)
return vm->linenumbers[statement - vm->statements];
return 0;
}
const char *qcvm_function_for(const qcvm_t *vm, const qcvm_statement_t *statement)
{
while (statement >= vm->statements)
{
for (size_t i = 0; i < vm->functions_size; i++)
{
const qcvm_function_t *func = vm->functions + i;
if (func->id < 0)
continue;
const qcvm_statement_t *start = vm->statements + (func->id - 1);
if (statement == start)
return qcvm_get_string(vm, func->name_index);
}
--statement;
}
return "???";
}
qcvm_func_t qcvm_find_function_id(const qcvm_t *vm, const char *name)
{
size_t i = 0;
for (qcvm_function_t *func = vm->functions; func < vm->functions + vm->functions_size; func++, i++)
if (!strcmp(qcvm_get_string(vm, func->name_index), name))
return (qcvm_func_t)i;
return FUNC_VOID;
}
qcvm_function_t *qcvm_get_function(const qcvm_t *vm, const qcvm_func_t id)
{
return &vm->functions[id];
}
qcvm_function_t *qcvm_find_function(const qcvm_t *vm, const char *name)
{
qcvm_func_t id = qcvm_find_function_id(vm, name);
if (!id)
return NULL;
return qcvm_get_function(vm, id);
}
int32_t qcvm_handle_alloc(qcvm_t *vm, void *ptr, const qcvm_handle_descriptor_t *descriptor)
{
qcvm_handle_t *handle;
if (vm->handles.free_size)
handle = &vm->handles.data[vm->handles.free[--vm->handles.free_size]];
else
{
if (vm->handles.size == vm->handles.allocated)
{
vm->handles.allocated += HANDLES_RESERVE;
qcvm_handle_t *old_handles = vm->handles.data;
vm->handles.data = (qcvm_handle_t *)qcvm_alloc(vm, sizeof(qcvm_handle_t) * vm->handles.allocated);
if (old_handles)
{
memcpy(vm->handles.data, old_handles, sizeof(qcvm_handle_t) * vm->handles.size);
qcvm_mem_free(vm, old_handles);
}
if (vm->handles.free)
qcvm_mem_free(vm, vm->handles.free);
vm->handles.free = (int32_t *)qcvm_alloc(vm, sizeof(int32_t) * vm->handles.allocated);
qcvm_debug(vm, "Increased handle storage to %u\n", vm->handles.allocated);
}
handle = &vm->handles.data[(int32_t)vm->handles.size++];
}
handle->id = (int32_t)(handle - vm->handles.data) + 1;
handle->descriptor = descriptor;
handle->handle = ptr;
return handle->id;
}
qcvm_handle_t *qcvm_fetch_handle(const qcvm_t *vm, const int32_t id)
{
if (id <= 0 || id > vm->handles.size)
qcvm_error(vm, "invalid handle ID");
qcvm_handle_t *handle = &vm->handles.data[id - 1];
if (!handle->handle)
qcvm_error(vm, "invalid handle ID");
return handle;
}
void qcvm_handle_free(qcvm_t *vm, qcvm_handle_t *handle)
{
if (!handle || !handle->handle || handle < vm->handles.data || handle >= (vm->handles.data + vm->handles.size))
qcvm_error(vm, "invalid handle");
if (handle->descriptor && handle->descriptor->free)
handle->descriptor->free(vm, handle->handle);
vm->handles.free[vm->handles.free_size++] = handle->id - 1;
handle->descriptor = NULL;
handle->handle = NULL;
}
qcvm_pointer_t qcvm_get_entity_field_pointer(qcvm_t *vm, edict_t *ent, const int32_t field)
{
const qcvm_pointer_t ptr = qcvm_make_pointer(vm, QCVM_POINTER_ENTITY, (int32_t *)ent + field);
#ifdef _DEBUG
if (!qcvm_resolve_pointer(vm, ptr, false, sizeof(qcvm_global_t), NULL))
qcvm_error(vm, "Returning invalid entity field pointer");
#endif
return ptr;
}
void qcvm_execute(qcvm_t *vm, qcvm_function_t *function)
{
if (!function || function->id == 0)
qcvm_error(vm, "bad function");