464 lines
12 KiB
C
464 lines
12 KiB
C
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN 1
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#include <windows.h>
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typedef HANDLE PipeType;
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#define NULLPIPE NULL
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typedef unsigned __int8 uint8;
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typedef __int32 int32;
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typedef unsigned __int64 uint64;
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#else
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <errno.h>
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#include <poll.h>
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#include <signal.h>
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typedef uint8_t uint8;
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typedef int32_t int32;
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typedef uint64_t uint64;
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typedef int PipeType;
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#define NULLPIPE -1
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#endif
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#include <stdlib.h>
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#include "steamshim_child.h"
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#ifdef STEAMSHIM_DEBUG
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#define dbgpipe printf
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#else
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static inline void dbgpipe(const char *fmt, ...) {}
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#endif
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static int writePipe(PipeType fd, const void *buf, const unsigned int _len);
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static int readPipe(PipeType fd, void *buf, const unsigned int _len);
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static void closePipe(PipeType fd);
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static char *getEnvVar(const char *key, char *buf, const size_t buflen);
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static int pipeReady(PipeType fd);
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#ifdef _WIN32
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static int pipeReady(PipeType fd)
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{
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DWORD avail = 0;
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return (PeekNamedPipe(fd, NULL, 0, NULL, &avail, NULL) && (avail > 0));
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} /* pipeReady */
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static int writePipe(PipeType fd, const void *buf, const unsigned int _len)
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{
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const DWORD len = (DWORD) _len;
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DWORD bw = 0;
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return ((WriteFile(fd, buf, len, &bw, NULL) != 0) && (bw == len));
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} /* writePipe */
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static int readPipe(PipeType fd, void *buf, const unsigned int _len)
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{
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const DWORD len = (DWORD) _len;
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DWORD br = 0;
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return ReadFile(fd, buf, len, &br, NULL) ? (int) br : -1;
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} /* readPipe */
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static void closePipe(PipeType fd)
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{
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CloseHandle(fd);
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} /* closePipe */
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static char *getEnvVar(const char *key, char *buf, const size_t buflen)
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{
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const DWORD rc = GetEnvironmentVariableA(key, buf, buflen);
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/* rc doesn't count null char, hence "<". */
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return ((rc > 0) && (rc < buflen)) ? buf : NULL;
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} /* getEnvVar */
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#else
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static int pipeReady(PipeType fd)
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{
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int rc;
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struct pollfd pfd = { fd, POLLIN | POLLERR | POLLHUP, 0 };
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while (((rc = poll(&pfd, 1, 0)) == -1) && (errno == EINTR)) { /*spin*/ }
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return (rc == 1);
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} /* pipeReady */
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static int writePipe(PipeType fd, const void *buf, const unsigned int _len)
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{
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const ssize_t len = (ssize_t) _len;
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ssize_t bw;
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while (((bw = write(fd, buf, len)) == -1) && (errno == EINTR)) { /*spin*/ }
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return (bw == len);
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} /* writePipe */
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static int readPipe(PipeType fd, void *buf, const unsigned int _len)
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{
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const ssize_t len = (ssize_t) _len;
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ssize_t br;
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while (((br = read(fd, buf, len)) == -1) && (errno == EINTR)) { /*spin*/ }
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return (int) br;
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} /* readPipe */
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static void closePipe(PipeType fd)
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{
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close(fd);
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} /* closePipe */
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static char *getEnvVar(const char *key, char *buf, const size_t buflen)
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{
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const char *envr = getenv(key);
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if (!envr || (strlen(envr) >= buflen))
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return NULL;
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strcpy(buf, envr);
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return buf;
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} /* getEnvVar */
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#endif
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static PipeType GPipeRead = NULLPIPE;
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static PipeType GPipeWrite = NULLPIPE;
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typedef enum ShimCmd
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{
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SHIMCMD_BYE,
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SHIMCMD_PUMP,
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SHIMCMD_REQUESTSTATS,
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SHIMCMD_STORESTATS,
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SHIMCMD_SETACHIEVEMENT,
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SHIMCMD_GETACHIEVEMENT,
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SHIMCMD_RESETSTATS,
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SHIMCMD_SETSTATI,
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SHIMCMD_GETSTATI,
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SHIMCMD_SETSTATF,
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SHIMCMD_GETSTATF,
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SHIMCMD_GETPERSONANAME,
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SHIMCMD_GETCURRENTGAMELANGUAGE,
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} ShimCmd;
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static int write1ByteCmd(const uint8 b1)
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{
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const uint8 buf[] = { 1, b1 };
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return writePipe(GPipeWrite, buf, sizeof (buf));
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} /* write1ByteCmd */
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static int write2ByteCmd(const uint8 b1, const uint8 b2)
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{
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const uint8 buf[] = { 2, b1, b2 };
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return writePipe(GPipeWrite, buf, sizeof (buf));
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} /* write2ByteCmd */
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static inline int writeBye(void)
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{
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dbgpipe("Child sending SHIMCMD_BYE().\n");
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return write1ByteCmd(SHIMCMD_BYE);
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} // writeBye
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static int initPipes(void)
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{
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char buf[64];
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if (!getEnvVar("STEAMSHIM_READHANDLE", buf, sizeof (buf)))
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return 0;
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GPipeRead = (PipeType) strtoull(buf, 0, 10);
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if (!getEnvVar("STEAMSHIM_WRITEHANDLE", buf, sizeof (buf)))
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return 0;
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GPipeWrite = (PipeType) strtoull(buf, 0, 10);
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return ((GPipeRead != NULLPIPE) && (GPipeWrite != NULLPIPE));
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} /* initPipes */
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int STEAMSHIM_init(void)
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{
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printf("Initializing Steam Shim...\n");
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dbgpipe("Child init start.\n");
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if (!initPipes())
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{
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dbgpipe("Child init failed.\n");
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return 0;
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} /* if */
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#ifndef _WIN32
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signal(SIGPIPE, SIG_IGN);
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#endif
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printf("Init of Steam Shim successful!\n");
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dbgpipe("Child init success!\n");
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return 1;
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} /* STEAMSHIM_init */
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void STEAMSHIM_deinit(void)
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{
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dbgpipe("Child deinit.\n");
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if (GPipeWrite != NULLPIPE)
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{
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writeBye();
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closePipe(GPipeWrite);
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} /* if */
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if (GPipeRead != NULLPIPE)
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closePipe(GPipeRead);
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GPipeRead = GPipeWrite = NULLPIPE;
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#ifndef _WIN32
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signal(SIGPIPE, SIG_DFL);
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#endif
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} /* STEAMSHIM_deinit */
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static inline int isAlive(void)
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{
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return ((GPipeRead != NULLPIPE) && (GPipeWrite != NULLPIPE));
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} /* isAlive */
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static inline int isDead(void)
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{
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return !isAlive();
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} /* isDead */
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int STEAMSHIM_alive(void)
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{
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return isAlive();
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} /* STEAMSHIM_alive */
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static const STEAMSHIM_Event *processEvent(const uint8 *buf, size_t buflen)
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{
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static STEAMSHIM_Event event;
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const STEAMSHIM_EventType type = (STEAMSHIM_EventType) *(buf++);
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buflen--;
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memset(&event, '\0', sizeof (event));
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event.type = type;
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event.okay = 1;
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#ifdef STEAMSHIM_DEBUG
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if (0) {}
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#define PRINTGOTEVENT(x) else if (type == x) printf("Child got " #x ".\n")
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PRINTGOTEVENT(SHIMEVENT_BYE);
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PRINTGOTEVENT(SHIMEVENT_STATSRECEIVED);
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PRINTGOTEVENT(SHIMEVENT_STATSSTORED);
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PRINTGOTEVENT(SHIMEVENT_SETACHIEVEMENT);
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PRINTGOTEVENT(SHIMEVENT_GETACHIEVEMENT);
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PRINTGOTEVENT(SHIMEVENT_RESETSTATS);
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PRINTGOTEVENT(SHIMEVENT_SETSTATI);
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PRINTGOTEVENT(SHIMEVENT_GETSTATI);
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PRINTGOTEVENT(SHIMEVENT_SETSTATF);
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PRINTGOTEVENT(SHIMEVENT_GETSTATF);
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PRINTGOTEVENT(SHIMEVENT_GETPERSONANAME);
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PRINTGOTEVENT(SHIMEVENT_GETCURRENTGAMELANGUAGE);
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#undef PRINTGOTEVENT
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else printf("Child got unknown shimevent %d.\n", (int) type);
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#endif
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switch (type)
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{
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case SHIMEVENT_BYE:
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break;
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case SHIMEVENT_STATSRECEIVED:
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case SHIMEVENT_STATSSTORED:
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if (!buflen) return NULL;
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event.okay = *(buf++) ? 1 : 0;
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break;
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case SHIMEVENT_SETACHIEVEMENT:
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if (buflen < 3) return NULL;
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event.ivalue = *(buf++) ? 1 : 0;
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event.okay = *(buf++) ? 1 : 0;
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strcpy(event.name, (const char *) buf);
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break;
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case SHIMEVENT_GETACHIEVEMENT:
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if (buflen < 10) return NULL;
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event.ivalue = (int) *(buf++);
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if (event.ivalue == 2)
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event.ivalue = event.okay = 0;
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event.epochsecs = (long long unsigned) *((uint64 *) buf);
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buf += sizeof (uint64);
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strcpy(event.name, (const char *) buf);
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break;
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case SHIMEVENT_RESETSTATS:
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if (buflen != 2) return NULL;
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event.ivalue = *(buf++) ? 1 : 0;
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event.okay = *(buf++) ? 1 : 0;
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break;
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case SHIMEVENT_SETSTATI:
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case SHIMEVENT_GETSTATI:
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event.okay = *(buf++) ? 1 : 0;
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event.ivalue = (int) *((int32 *) buf);
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buf += sizeof (int32);
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strcpy(event.name, (const char *) buf);
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break;
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case SHIMEVENT_SETSTATF:
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case SHIMEVENT_GETSTATF:
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event.okay = *(buf++) ? 1 : 0;
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event.fvalue = (int) *((float *) buf);
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buf += sizeof (float);
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strcpy(event.name, (const char *) buf);
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break;
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case SHIMEVENT_GETPERSONANAME:
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case SHIMEVENT_GETCURRENTGAMELANGUAGE:
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strcpy(event.name, (const char *) buf);
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break;
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default: /* uh oh */
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return NULL;
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} /* switch */
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return &event;
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} /* processEvent */
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const STEAMSHIM_Event *STEAMSHIM_pump(void)
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{
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static uint8 buf[256];
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static int br = 0;
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int evlen = (br > 0) ? ((int) buf[0]) : 0;
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if (isDead())
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return NULL;
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if (br <= evlen) /* we have an incomplete commmand. Try to read more. */
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{
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if (pipeReady(GPipeRead))
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{
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const int morebr = readPipe(GPipeRead, buf + br, sizeof (buf) - br);
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if (morebr > 0)
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br += morebr;
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else /* uh oh */
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{
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dbgpipe("Child readPipe failed! Shutting down.\n");
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STEAMSHIM_deinit(); /* kill it all. */
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} /* else */
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} /* if */
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} /* if */
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if (evlen && (br > evlen))
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{
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const STEAMSHIM_Event *retval = processEvent(buf+1, evlen);
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br -= evlen + 1;
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if (br > 0)
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memmove(buf, buf+evlen+1, br);
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return retval;
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} /* if */
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/* Run Steam event loop. */
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if (br == 0)
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{
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dbgpipe("Child sending SHIMCMD_PUMP().\n");
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write1ByteCmd(SHIMCMD_PUMP);
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} /* if */
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return NULL;
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} /* STEAMSHIM_pump */
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void STEAMSHIM_requestStats(void)
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{
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_REQUESTSTATS().\n");
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write1ByteCmd(SHIMCMD_REQUESTSTATS);
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} /* STEAMSHIM_requestStats */
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void STEAMSHIM_storeStats(void)
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{
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_STORESTATS().\n");
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write1ByteCmd(SHIMCMD_STORESTATS);
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} /* STEAMSHIM_storeStats */
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void STEAMSHIM_setAchievement(const char *name, const int enable)
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{
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uint8 buf[256];
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uint8 *ptr = buf+1;
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_SETACHIEVEMENT('%s', %senable).\n", name, enable ? "" : "!");
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*(ptr++) = (uint8) SHIMCMD_SETACHIEVEMENT;
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*(ptr++) = enable ? 1 : 0;
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strcpy((char *) ptr, name);
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ptr += strlen(name) + 1;
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buf[0] = (uint8) ((ptr-1) - buf);
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writePipe(GPipeWrite, buf, buf[0] + 1);
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} /* STEAMSHIM_setAchievement */
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void STEAMSHIM_getAchievement(const char *name)
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{
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uint8 buf[256];
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uint8 *ptr = buf+1;
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_GETACHIEVEMENT('%s').\n", name);
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*(ptr++) = (uint8) SHIMCMD_GETACHIEVEMENT;
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strcpy((char *) ptr, name);
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ptr += strlen(name) + 1;
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buf[0] = (uint8) ((ptr-1) - buf);
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writePipe(GPipeWrite, buf, buf[0] + 1);
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} /* STEAMSHIM_getAchievement */
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void STEAMSHIM_resetStats(const int bAlsoAchievements)
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{
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_RESETSTATS(%salsoAchievements).\n", bAlsoAchievements ? "" : "!");
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write2ByteCmd(SHIMCMD_RESETSTATS, bAlsoAchievements ? 1 : 0);
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} /* STEAMSHIM_resetStats */
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static void writeStatThing(const ShimCmd cmd, const char *name, const void *val, const size_t vallen)
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{
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uint8 buf[256];
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uint8 *ptr = buf+1;
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if (isDead()) return;
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*(ptr++) = (uint8) cmd;
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if (vallen)
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{
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memcpy(ptr, val, vallen);
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ptr += vallen;
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} /* if */
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strcpy((char *) ptr, name);
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ptr += strlen(name) + 1;
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buf[0] = (uint8) ((ptr-1) - buf);
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writePipe(GPipeWrite, buf, buf[0] + 1);
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} /* writeStatThing */
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void STEAMSHIM_setStatI(const char *name, const int _val)
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{
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const int32 val = (int32) _val;
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dbgpipe("Child sending SHIMCMD_SETSTATI('%s', val %d).\n", name, val);
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writeStatThing(SHIMCMD_SETSTATI, name, &val, sizeof (val));
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} /* STEAMSHIM_setStatI */
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void STEAMSHIM_getStatI(const char *name)
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{
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dbgpipe("Child sending SHIMCMD_GETSTATI('%s').\n", name);
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writeStatThing(SHIMCMD_GETSTATI, name, NULL, 0);
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} /* STEAMSHIM_getStatI */
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void STEAMSHIM_setStatF(const char *name, const float val)
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{
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dbgpipe("Child sending SHIMCMD_SETSTATF('%s', val %f).\n", name, val);
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writeStatThing(SHIMCMD_SETSTATF, name, &val, sizeof (val));
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} /* STEAMSHIM_setStatF */
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void STEAMSHIM_getStatF(const char *name)
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{
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dbgpipe("Child sending SHIMCMD_GETSTATF('%s').\n", name);
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writeStatThing(SHIMCMD_GETSTATF, name, NULL, 0);
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} /* STEAMSHIM_getStatF */
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void STEAMSHIM_getPersonaName()
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{
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_GETPERSONANAME().\n");
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write1ByteCmd(SHIMCMD_GETPERSONANAME);
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} /* STEAMSHIM_getPersonaName */
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void STEAMSHIM_getCurrentGameLanguage()
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{
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if (isDead()) return;
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dbgpipe("Child sending SHIMCMD_GETCURRENTGAMELANGUAGE().\n");
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write1ByteCmd(SHIMCMD_GETCURRENTGAMELANGUAGE);
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} /* STEAMSHIM_getCurrentGameLanguage */
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/* end of steamshim_child.c ... */
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