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cheevos.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2015 - Andre Leiradella
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <ctype.h>
#include <formats/jsonsax.h>
#include <retro_file.h>
#include <rhash.h>
#include <retro_log.h>
#include <rthreads/async_job.h>
#include "cheevos.h"
#include "dynamic.h"
#include "net_http_special.h"
#include "configuration.h"
#include "performance.h"
#include "runloop.h"
#include "menu/menu.h"
enum
{
CHEEVOS_VAR_SIZE_BIT_0,
CHEEVOS_VAR_SIZE_BIT_1,
CHEEVOS_VAR_SIZE_BIT_2,
CHEEVOS_VAR_SIZE_BIT_3,
CHEEVOS_VAR_SIZE_BIT_4,
CHEEVOS_VAR_SIZE_BIT_5,
CHEEVOS_VAR_SIZE_BIT_6,
CHEEVOS_VAR_SIZE_BIT_7,
CHEEVOS_VAR_SIZE_NIBBLE_LOWER,
CHEEVOS_VAR_SIZE_NIBBLE_UPPER,
/* Byte, */
CHEEVOS_VAR_SIZE_EIGHT_BITS, /* =Byte, */
CHEEVOS_VAR_SIZE_SIXTEEN_BITS,
CHEEVOS_VAR_SIZE_THIRTYTWO_BITS,
CHEEVOS_VAR_SIZE_LAST
}; /* cheevos_var_t.size */
enum
{
CHEEVOS_VAR_TYPE_ADDRESS, /* compare to the value of a live address in RAM */
CHEEVOS_VAR_TYPE_VALUE_COMP, /* a number. assume 32 bit */
CHEEVOS_VAR_TYPE_DELTA_MEM, /* the value last known at this address. */
CHEEVOS_VAR_TYPE_DYNAMIC_VAR, /* a custom user-set variable */
CHEEVOS_VAR_TYPE_LAST
}; /* cheevos_var_t.type */
enum
{
CHEEVOS_COND_OP_EQUALS,
CHEEVOS_COND_OP_LESS_THAN,
CHEEVOS_COND_OP_LESS_THAN_OR_EQUAL,
CHEEVOS_COND_OP_GREATER_THAN,
CHEEVOS_COND_OP_GREATER_THAN_OR_EQUAL,
CHEEVOS_COND_OP_NOT_EQUAL_TO,
CHEEVOS_COND_OP_LAST
}; /* cheevos_cond_t.op */
enum
{
CHEEVOS_COND_TYPE_STANDARD,
CHEEVOS_COND_TYPE_PAUSE_IF,
CHEEVOS_COND_TYPE_RESET_IF,
CHEEVOS_COND_TYPE_LAST
}; /* cheevos_cond_t.type */
enum
{
CHEEVOS_DIRTY_TITLE = 1 << 0,
CHEEVOS_DIRTY_DESC = 1 << 1,
CHEEVOS_DIRTY_POINTS = 1 << 2,
CHEEVOS_DIRTY_AUTHOR = 1 << 3,
CHEEVOS_DIRTY_ID = 1 << 4,
CHEEVOS_DIRTY_BADGE = 1 << 5,
CHEEVOS_DIRTY_CONDITIONS = 1 << 6,
CHEEVOS_DIRTY_VOTES = 1 << 7,
CHEEVOS_DIRTY_DESCRIPTION = 1 << 8,
CHEEVOS_DIRTY_ALL = (1 << 9) - 1
};
typedef struct
{
unsigned size;
unsigned type;
unsigned bank_id;
unsigned value;
unsigned previous;
} cheevos_var_t;
typedef struct
{
unsigned type;
unsigned req_hits;
unsigned curr_hits;
cheevos_var_t source;
unsigned op;
cheevos_var_t target;
} cheevos_cond_t;
typedef struct
{
cheevos_cond_t *conds;
unsigned count;
const char* expression;
} cheevos_condset_t;
typedef struct
{
unsigned id;
const char *title;
const char *description;
const char *author;
const char *badge;
unsigned points;
unsigned dirty;
int active;
int modified;
cheevos_condset_t *condsets;
unsigned count;
} cheevo_t;
typedef struct
{
cheevo_t *cheevos;
unsigned count;
} cheevoset_t;
typedef struct
{
int loaded;
cheevoset_t core;
cheevoset_t unofficial;
char token[32];
} cheevos_locals_t;
cheevos_locals_t cheevos_locals =
{
0,
{NULL, 0},
{NULL, 0},
{0},
};
cheevos_globals_t cheevos_globals =
{
0,
0
};
/*****************************************************************************
Supporting functions.
*****************************************************************************/
static uint32_t cheevos_djb2(const char* str, size_t length)
{
const unsigned char *aux = (const unsigned char*)str;
const unsigned char *end = aux + length;
uint32_t hash = 5381;
while (aux < end)
hash = (hash << 5) + hash + *aux++;
return hash;
}
static int cheevos_http_get(const char **result, size_t *size, const char *url, retro_time_t *timeout)
{
int ret = net_http_get(result, size, url, timeout);
const char *msg;
switch (ret)
{
case NET_HTTP_GET_OK:
return ret;
case NET_HTTP_GET_MALFORMED_URL:
msg = "malformed url";
break;
case NET_HTTP_GET_CONNECT_ERROR:
msg = "connect error";
break;
case NET_HTTP_GET_TIMEOUT:
msg = "timeout";
break;
default:
msg = "?";
break;
}
RARCH_LOG("CHEEVOS error getting %s: %s\n", url, msg);
RARCH_LOG("CHEEVOS http result was %s\n", *result ? *result : "(null)");
return ret;
}
typedef struct
{
unsigned key_hash;
int is_key;
const char *value;
size_t length;
}
cheevos_getvalueud_t;
static int cheevos_getvalue__json_key(void *userdata, const char *name, size_t length)
{
cheevos_getvalueud_t* ud = (cheevos_getvalueud_t*)userdata;
ud->is_key = cheevos_djb2(name, length) == ud->key_hash;
return 0;
}
static int cheevos_getvalue__json_string(void *userdata, const char *string, size_t length)
{
cheevos_getvalueud_t* ud = (cheevos_getvalueud_t*)userdata;
if (ud->is_key)
{
ud->value = string;
ud->length = length;
ud->is_key = 0;
}
return 0;
}
static int cheevos_getvalue__json_boolean(void *userdata, int istrue)
{
cheevos_getvalueud_t* ud = (cheevos_getvalueud_t*)userdata;
if ( ud->is_key )
{
ud->value = istrue ? "true" : "false";
ud->length = istrue ? 4 : 5;
ud->is_key = 0;
}
return 0;
}
static int cheevos_getvalue__json_null(void *userdata)
{
cheevos_getvalueud_t* ud = (cheevos_getvalueud_t*)userdata;
if ( ud->is_key )
{
ud->value = "null";
ud->length = 4;
ud->is_key = 0;
}
return 0;
}
static int cheevos_get_value(const char *json, unsigned key_hash, char *value, size_t length)
{
static const jsonsax_handlers_t handlers =
{
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
cheevos_getvalue__json_key,
NULL,
cheevos_getvalue__json_string,
cheevos_getvalue__json_string, /* number */
cheevos_getvalue__json_boolean,
cheevos_getvalue__json_null
};
cheevos_getvalueud_t ud;
ud.key_hash = key_hash;
ud.is_key = 0;
ud.value = NULL;
ud.length = 0;
*value = 0;
if (jsonsax_parse(json, &handlers, (void*)&ud) == JSONSAX_OK && ud.value && ud.length < length)
{
strncpy(value, ud.value, length);
value[ud.length] = 0;
return 0;
}
return -1;
}
/*****************************************************************************
Count number of achievements in a JSON file.
*****************************************************************************/
typedef struct
{
int in_cheevos;
uint32_t field_hash;
unsigned core_count;
unsigned unofficial_count;
}
cheevos_countud_t;
static int cheevos_count__json_end_array(void *userdata)
{
cheevos_countud_t* ud = (cheevos_countud_t*)userdata;
ud->in_cheevos = 0;
return 0;
}
static int cheevos_count__json_key(void *userdata, const char *name, size_t length)
{
cheevos_countud_t* ud = (cheevos_countud_t*)userdata;
ud->field_hash = cheevos_djb2(name, length);
if (ud->field_hash == 0x69749ae1U /* Achievements */)
ud->in_cheevos = 1;
return 0;
}
static int cheevos_count__json_number(void *userdata, const char *number, size_t length)
{
long flags;
cheevos_countud_t* ud = (cheevos_countud_t*)userdata;
if (ud->in_cheevos && ud->field_hash == 0x0d2e96b2U /* Flags */)
{
flags = strtol(number, NULL, 10);
if (flags == 3) /* core achievements */
ud->core_count++;
else if (flags == 5) /* unofficial achievements */
ud->unofficial_count++;
}
return 0;
}
static int cheevos_count_cheevos(const char *json, unsigned *core_count, unsigned *unofficial_count)
{
static const jsonsax_handlers_t handlers =
{
NULL,
NULL,
NULL,
NULL,
NULL,
cheevos_count__json_end_array,
cheevos_count__json_key,
NULL,
NULL,
cheevos_count__json_number,
NULL,
NULL
};
int res;
cheevos_countud_t ud;
ud.in_cheevos = 0;
ud.core_count = 0;
ud.unofficial_count = 0;
res = jsonsax_parse(json, &handlers, (void*)&ud);
*core_count = ud.core_count;
*unofficial_count = ud.unofficial_count;
return res;
}
/*****************************************************************************
Parse the MemAddr field.
*****************************************************************************/
static unsigned cheevos_prefix_to_comp_size(char prefix)
{
/* Careful not to use ABCDEF here, this denotes part of an actual variable! */
switch( toupper( prefix ) )
{
case 'M': return CHEEVOS_VAR_SIZE_BIT_0;
case 'N': return CHEEVOS_VAR_SIZE_BIT_1;
case 'O': return CHEEVOS_VAR_SIZE_BIT_2;
case 'P': return CHEEVOS_VAR_SIZE_BIT_3;
case 'Q': return CHEEVOS_VAR_SIZE_BIT_4;
case 'R': return CHEEVOS_VAR_SIZE_BIT_5;
case 'S': return CHEEVOS_VAR_SIZE_BIT_6;
case 'T': return CHEEVOS_VAR_SIZE_BIT_7;
case 'L': return CHEEVOS_VAR_SIZE_NIBBLE_LOWER;
case 'U': return CHEEVOS_VAR_SIZE_NIBBLE_UPPER;
case 'H': return CHEEVOS_VAR_SIZE_EIGHT_BITS;
case 'X': return CHEEVOS_VAR_SIZE_THIRTYTWO_BITS;
default:
case ' ': return CHEEVOS_VAR_SIZE_SIXTEEN_BITS;
}
}
static unsigned cheevos_read_hits(const char **memaddr)
{
char *end;
const char *str = *memaddr;
unsigned num_hits = 0;
if (*str == '(' || *str == '.')
{
num_hits = strtol(str + 1, &end, 10);
str = end + 1;
}
*memaddr = str;
return num_hits;
}
static unsigned cheevos_parse_operator(const char **memaddr)
{
unsigned char op;
const char *str = *memaddr;
if (*str == '=' && str[1] == '=')
{
op = CHEEVOS_COND_OP_EQUALS;
str += 2;
}
else if (*str == '=')
{
op = CHEEVOS_COND_OP_EQUALS;
str++;
}
else if (*str == '!' && str[1] == '=')
{
op = CHEEVOS_COND_OP_NOT_EQUAL_TO;
str += 2;
}
else if (*str == '<' && str[1] == '=')
{
op = CHEEVOS_COND_OP_LESS_THAN_OR_EQUAL;
str += 2;
}
else if (*str == '<')
{
op = CHEEVOS_COND_OP_LESS_THAN;
str++;
}
else if (*str == '>' && str[1] == '=')
{
op = CHEEVOS_COND_OP_GREATER_THAN_OR_EQUAL;
str += 2;
}
else if (*str == '>')
{
op = CHEEVOS_COND_OP_GREATER_THAN;
str++;
}
else
{
/* TODO log the exception */
op = CHEEVOS_COND_OP_EQUALS;
}
*memaddr = str;
return op;
}
static void cheevos_parse_var(cheevos_var_t *var, const char **memaddr)
{
char *end;
const char *str = *memaddr;
unsigned base = 16;
if (toupper(*str) == 'D' && str[1] == '0' && toupper(str[2]) == 'X')
{
/* d0x + 4 hex digits */
str += 3;
var->type = CHEEVOS_VAR_TYPE_DELTA_MEM;
}
else if (*str == '0' && toupper(str[1]) == 'X')
{
/* 0x + 4 hex digits */
str += 2;
var->type = CHEEVOS_VAR_TYPE_ADDRESS;
}
else
{
var->type = CHEEVOS_VAR_TYPE_VALUE_COMP;
if (toupper(*str) == 'H')
str++;
else
base = 10;
}
if (var->type != CHEEVOS_VAR_TYPE_VALUE_COMP)
{
var->size = cheevos_prefix_to_comp_size(*str);
if (var->size != CHEEVOS_VAR_SIZE_SIXTEEN_BITS)
str++;
}
var->value = strtol(str, &end, base);
*memaddr = end;
}
static void cheevos_parse_cond(cheevos_cond_t *cond, const char **memaddr)
{
const char* str = *memaddr;
if (*str == 'R' && str[1] == ':')
{
cond->type = CHEEVOS_COND_TYPE_RESET_IF;
str += 2;
}
else if (*str == 'P' && str[1] == ':')
{
cond->type = CHEEVOS_COND_TYPE_PAUSE_IF;
str += 2;
}
else
cond->type = CHEEVOS_COND_TYPE_STANDARD;
cheevos_parse_var(&cond->source, &str);
cond->op = cheevos_parse_operator(&str);
cheevos_parse_var(&cond->target, &str);
cond->curr_hits = 0;
cond->req_hits = cheevos_read_hits(&str);
*memaddr = str;
}
static unsigned cheevos_count_cond_sets(const char *memaddr)
{
cheevos_cond_t cond;
unsigned count = 0;
do
{
do
{
while (*memaddr == ' ' || *memaddr == '_' || *memaddr == '|' || *memaddr == 'S')
memaddr++; /* Skip any chars up til the start of the achievement condition */
cheevos_parse_cond(&cond, &memaddr);
}
while (*memaddr == '_' || *memaddr == 'R' || *memaddr == 'P'); /* AND, ResetIf, PauseIf */
count++;
}
while (*memaddr == 'S'); /* Repeat for all subconditions if they exist */
return count;
}
static unsigned cheevos_count_conds_in_set(const char *memaddr, unsigned set)
{
cheevos_cond_t cond;
unsigned index = 0;
unsigned count = 0;
do
{
do
{
while (*memaddr == ' ' || *memaddr == '_' || *memaddr == '|' || *memaddr == 'S')
memaddr++; /* Skip any chars up til the start of the achievement condition */
cheevos_parse_cond(&cond, &memaddr);
if (index == set)
count++;
}
while (*memaddr == '_' || *memaddr == 'R' || *memaddr == 'P'); /* AND, ResetIf, PauseIf */
}
while (*memaddr == 'S'); /* Repeat for all subconditions if they exist */
return count;
}
static void cheevos_parse_memaddr(cheevos_cond_t *cond, const char *memaddr)
{
do
{
do
{
while (*memaddr == ' ' || *memaddr == '_' || *memaddr == '|' || *memaddr == 'S')
memaddr++; /* Skip any chars up til the start of the achievement condition */
cheevos_parse_cond(cond++, &memaddr);
}
while (*memaddr == '_' || *memaddr == 'R' || *memaddr == 'P'); /* AND, ResetIf, PauseIf */
}
while (*memaddr == 'S'); /* Repeat for all subconditions if they exist */
}
/*****************************************************************************
Load achievements from a JSON string.
*****************************************************************************/
typedef struct
{
const char *string;
size_t length;
} cheevos_field_t;
typedef struct
{
int in_cheevos;
unsigned core_count;
unsigned unofficial_count;
cheevos_field_t *field;
cheevos_field_t id, memaddr, title, desc, points, author;
cheevos_field_t modified, created, badge, flags;
} cheevos_readud_t;
static INLINE const char *cheevos_dupstr(const cheevos_field_t *field)
{
char *string = (char*)malloc(field->length + 1);
if (!string)
return NULL;
memcpy ((void*)string, (void*)field->string, field->length);
string[field->length] = 0;
return string;
}
static int cheevos_new_cheevo(cheevos_readud_t *ud)
{
const cheevos_condset_t *end;
unsigned set;
cheevos_condset_t *condset;
cheevo_t *cheevo;
int flags = strtol(ud->flags.string, NULL, 10);
if (flags == 3)
cheevo = cheevos_locals.core.cheevos + ud->core_count++;
else
cheevo = cheevos_locals.unofficial.cheevos + ud->unofficial_count++;
cheevo->id = strtol(ud->id.string, NULL, 10);
cheevo->title = cheevos_dupstr(&ud->title);
cheevo->description = cheevos_dupstr(&ud->desc);
cheevo->author = cheevos_dupstr(&ud->author);
cheevo->badge = cheevos_dupstr(&ud->badge);
cheevo->points = strtol(ud->points.string, NULL, 10);
cheevo->dirty = 0;
cheevo->active = 1; /* flags == 3; */
cheevo->modified = 0;
if (!cheevo->title || !cheevo->description || !cheevo->author || !cheevo->badge)
{
free((void*)cheevo->title);
free((void*)cheevo->description);
free((void*)cheevo->author);
free((void*)cheevo->badge);
return -1;
}
cheevo->count = cheevos_count_cond_sets(ud->memaddr.string);
if (cheevo->count)
{
cheevo->condsets = (cheevos_condset_t*)malloc(cheevo->count * sizeof(cheevos_condset_t));
if (!cheevo->condsets)
return -1;
memset((void*)cheevo->condsets, 0, cheevo->count * sizeof(cheevos_condset_t));
end = cheevo->condsets + cheevo->count;
set = 0;
for (condset = cheevo->condsets; condset < end; condset++)
{
condset->count = cheevos_count_conds_in_set(ud->memaddr.string, set++);
if (condset->count)
{
condset->conds = (cheevos_cond_t*)malloc(condset->count * sizeof(cheevos_cond_t));
if (!condset->conds)
return -1;
memset((void*)condset->conds, 0, condset->count * sizeof(cheevos_cond_t));
condset->expression = cheevos_dupstr(&ud->memaddr);
cheevos_parse_memaddr(condset->conds, ud->memaddr.string);
}
else
condset->conds = NULL;
}
}
return 0;
}
static int cheevos_read__json_key( void *userdata, const char *name, size_t length)
{
cheevos_readud_t *ud = (cheevos_readud_t*)userdata;
uint32_t hash = cheevos_djb2(name, length);
ud->field = NULL;
if (hash == 0x69749ae1U /* Achievements */)
ud->in_cheevos = 1;
else if (ud->in_cheevos)
{
switch ( hash )
{
case 0x005973f2U: /* ID */ ud->field = &ud->id; break;
case 0x1e76b53fU: /* MemAddr */ ud->field = &ud->memaddr; break;
case 0x0e2a9a07U: /* Title */ ud->field = &ud->title; break;
case 0xe61a1f69U: /* Description */ ud->field = &ud->desc; break;
case 0xca8fce22U: /* Points */ ud->field = &ud->points; break;
case 0xa804edb8U: /* Author */ ud->field = &ud->author; break;
case 0xdcea4fe6U: /* Modified */ ud->field = &ud->modified; break;
case 0x3a84721dU: /* Created */ ud->field = &ud->created; break;
case 0x887685d9U: /* BadgeName */ ud->field = &ud->badge; break;
case 0x0d2e96b2U: /* Flags */ ud->field = &ud->flags; break;
}
}
return 0;
}
static int cheevos_read__json_string(void *userdata, const char *string, size_t length)
{
cheevos_readud_t *ud = (cheevos_readud_t*)userdata;
if (ud->field)
{
ud->field->string = string;
ud->field->length = length;
}
return 0;
}
static int cheevos_read__json_number(void *userdata, const char *number, size_t length)
{
cheevos_readud_t *ud = (cheevos_readud_t*)userdata;
if (ud->field)
{
ud->field->string = number;
ud->field->length = length;
}
return 0;
}
static int cheevos_read__json_end_object(void *userdata)
{
cheevos_readud_t *ud = (cheevos_readud_t*)userdata;
if (ud->in_cheevos)
return cheevos_new_cheevo(ud);
return 0;
}
static int cheevos_read__json_end_array(void *userdata)
{
cheevos_readud_t *ud = (cheevos_readud_t*)userdata;
ud->in_cheevos = 0;
return 0;
}
static int cheevos_parse(const char *json)
{
static const jsonsax_handlers_t handlers =
{
NULL,
NULL,
NULL,
cheevos_read__json_end_object,
NULL,
cheevos_read__json_end_array,
cheevos_read__json_key,
NULL,
cheevos_read__json_string,
cheevos_read__json_number,
NULL,
NULL
};
unsigned core_count, unofficial_count;
cheevos_readud_t ud;
settings_t *settings = config_get_ptr();
/* Just return OK if cheevos are disabled. */
if (!settings->cheevos.enable)
return 0;
/* Count the number of achievements in the JSON file. */
if (cheevos_count_cheevos(json, &core_count, &unofficial_count) != JSONSAX_OK)
return -1;
/* Allocate the achievements. */
cheevos_locals.core.cheevos = (cheevo_t*)malloc(core_count * sizeof(cheevo_t));
cheevos_locals.core.count = core_count;
cheevos_locals.unofficial.cheevos = (cheevo_t*)malloc(unofficial_count * sizeof(cheevo_t));
cheevos_locals.unofficial.count = unofficial_count;
if (!cheevos_locals.core.cheevos || !cheevos_locals.unofficial.cheevos)
{
free((void*)cheevos_locals.core.cheevos);
free((void*)cheevos_locals.unofficial.cheevos);
cheevos_locals.core.count = cheevos_locals.unofficial.count = 0;
return -1;
}
memset((void*)cheevos_locals.core.cheevos, 0, core_count * sizeof(cheevo_t));
memset((void*)cheevos_locals.unofficial.cheevos, 0, unofficial_count * sizeof(cheevo_t));
/* Load the achievements. */
ud.in_cheevos = 0;
ud.field = NULL;
ud.core_count = 0;
ud.unofficial_count = 0;
if (!jsonsax_parse(json, &handlers, (void*)&ud) == JSONSAX_OK)
{
cheevos_unload();
return -1;
}
return 0;
}
/*****************************************************************************
Test all the achievements (call once per frame).
*****************************************************************************/
static const uint8_t *cheevos_get_memory(unsigned offset)
{
size_t size = core.retro_get_memory_size(RETRO_MEMORY_SYSTEM_RAM);
uint8_t *memory;
if (offset < size)
{
memory = (uint8_t*)core.retro_get_memory_data(RETRO_MEMORY_SYSTEM_RAM);
return memory + offset;
}
offset -= size;
size = core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
if (offset < size)
{
memory = (uint8_t*)core.retro_get_memory_data(RETRO_MEMORY_SAVE_RAM);
return memory + offset;
}
offset -= size;
size = core.retro_get_memory_size(RETRO_MEMORY_VIDEO_RAM);
if (offset < size)
{
memory = (uint8_t*)core.retro_get_memory_data(RETRO_MEMORY_VIDEO_RAM);
return memory + offset;
}
offset -= size;
size = core.retro_get_memory_size(RETRO_MEMORY_RTC);
if (offset < size)
{
memory = (uint8_t*)core.retro_get_memory_data(RETRO_MEMORY_RTC);
return memory + offset;
}
return NULL;
}
static unsigned cheevos_get_var_value(cheevos_var_t *var)
{
unsigned previous = var->previous;
unsigned live_val = 0;
const uint8_t *memory;
if (var->type == CHEEVOS_VAR_TYPE_VALUE_COMP)
return var->value;
if (var->type == CHEEVOS_VAR_TYPE_ADDRESS || var->type == CHEEVOS_VAR_TYPE_DELTA_MEM)
{
/* TODO Check with Scott if the bank id is needed */
memory = cheevos_get_memory(var->value);
if (memory)
{
live_val = memory[0];
if (var->size >= CHEEVOS_VAR_SIZE_BIT_0 && var->size <= CHEEVOS_VAR_SIZE_BIT_7)
live_val = (live_val & (1 << (var->size - CHEEVOS_VAR_SIZE_BIT_0))) != 0;
else if (var->size == CHEEVOS_VAR_SIZE_NIBBLE_LOWER)
live_val &= 0x0f;
else if (var->size == CHEEVOS_VAR_SIZE_NIBBLE_UPPER)
live_val = (live_val >> 4) & 0x0f;
else if (var->size == CHEEVOS_VAR_SIZE_EIGHT_BITS)
; /* nothing */
else if (var->size == CHEEVOS_VAR_SIZE_SIXTEEN_BITS)
live_val |= memory[1] << 8;
else if (var->size == CHEEVOS_VAR_SIZE_THIRTYTWO_BITS)
{
live_val |= memory[1] << 8;
live_val |= memory[2] << 16;
live_val |= memory[3] << 24;
}
}
else
live_val = 0;
if (var->type == CHEEVOS_VAR_TYPE_DELTA_MEM)
{
var->previous = live_val;
return previous;
}
return live_val;
}
/* We shouldn't get here... */
return 0;
}
static int cheevos_test_condition(cheevos_cond_t *cond)
{
unsigned sval = cheevos_get_var_value(&cond->source);
unsigned tval = cheevos_get_var_value(&cond->target);
switch (cond->op)
{
case CHEEVOS_COND_OP_EQUALS:
return sval == tval;
case CHEEVOS_COND_OP_LESS_THAN:
return sval < tval;
case CHEEVOS_COND_OP_LESS_THAN_OR_EQUAL:
return sval <= tval;
case CHEEVOS_COND_OP_GREATER_THAN:
return sval > tval;
case CHEEVOS_COND_OP_GREATER_THAN_OR_EQUAL:
return sval >= tval;
case CHEEVOS_COND_OP_NOT_EQUAL_TO:
return sval != tval;
default:
return 1;
}
}
static int cheevos_test_cond_set(const cheevos_condset_t *condset, int *dirty_conds, int *reset_conds, int match_any)
{
int cond_valid = 0;
int set_valid = 1;
const cheevos_cond_t *end = condset->conds + condset->count;
cheevos_cond_t *cond;
/* Now, read all Pause conditions, and if any are true, do not process further (retain old state) */
for (cond = condset->conds; cond < end; cond++)
{
if (cond->type == CHEEVOS_COND_TYPE_PAUSE_IF)
{
/* Reset by default, set to 1 if hit! */
cond->curr_hits = 0;