rev |
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jbe@79
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1
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jbe@79
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2 #include <stdlib.h>
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jbe@79
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3 #include <unistd.h>
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jbe@79
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4 #include <stdint.h>
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jbe@79
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5 #include <errno.h>
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jbe@79
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6 #include <string.h>
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jbe@79
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7 #include <stdio.h>
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jbe@79
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8 #include <time.h>
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jbe@79
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9 #include <sys/time.h>
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jbe@79
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10 #include <sys/socket.h>
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jbe@79
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11 #include <sys/select.h>
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jbe@81
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12 #include <fcntl.h>
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13
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jbe@79
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14 #include <lua.h>
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jbe@79
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15 #include <lauxlib.h>
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jbe@79
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16 #include <lualib.h>
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jbe@79
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17
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jbe@80
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18 #define MOONBR_IO_MAXSTRERRORLEN 80
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jbe@80
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19 #define MOONBR_IO_WRITEBUFLEN 4096
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jbe@80
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20
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jbe@80
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21 #define moonbr_io_errmsg() \
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22 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
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23 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
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jbe@80
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24
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jbe@80
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25
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jbe@79
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26 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
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jbe@79
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27 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
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jbe@79
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28
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jbe@79
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29 typedef struct {
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jbe@79
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30 int fd;
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jbe@84
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31 int issocket;
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jbe@81
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32 int nonblocking;
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jbe@81
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33 int writeerr;
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jbe@83
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34 size_t writeleft;
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jbe@83
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35 #if LUA_VERSION_NUM >= 503
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jbe@83
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36 lua_Integer writeqin;
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jbe@83
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37 lua_Integer writeqout;
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jbe@83
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38 #else
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jbe@83
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39 int writeqin;
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jbe@83
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40 int writeqout;
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jbe@83
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41 #endif
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jbe@83
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42 size_t writeqoff;
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jbe@81
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43 int writebufcnt;
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jbe@80
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44 char writebuf[MOONBR_IO_WRITEBUFLEN];
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jbe@79
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45 } moonbr_io_handle_t;
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jbe@79
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46
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jbe@81
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47 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
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jbe@81
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48 if (handle->nonblocking != nonblocking) {
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jbe@81
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49 int flags;
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jbe@81
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50 flags = fcntl(handle->fd, F_GETFL, 0);
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jbe@81
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51 if (flags == -1) {
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jbe@81
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52 moonbr_io_errmsg();
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jbe@81
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53 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
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jbe@81
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54 }
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jbe@81
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55 if (nonblocking) flags |= O_NONBLOCK;
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jbe@81
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56 else flags &= ~O_NONBLOCK;
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jbe@81
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57 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
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jbe@81
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58 moonbr_io_errmsg();
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jbe@81
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59 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
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jbe@81
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60 }
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jbe@81
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61 }
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jbe@81
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62 }
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63
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jbe@81
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64 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
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jbe@80
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65 moonbr_io_handle_t *handle;
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jbe@80
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66 int i, top;
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jbe@80
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67 const char *str;
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jbe@81
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68 size_t strlen, strpos;
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jbe@80
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69 size_t written;
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jbe@80
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70 ssize_t result;
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jbe@80
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71 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@83
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72 if (handle->fd < 0) luaL_error(L, "Attempt to write to a closed I/O handle");
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jbe@81
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73 if (handle->writeerr) {
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jbe@80
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74 lua_pushnil(L);
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jbe@80
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75 lua_pushliteral(L, "Previous write error");
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jbe@80
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76 return 2;
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jbe@80
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77 }
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jbe@81
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78 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
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jbe@84
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79 top = lua_gettop(L);
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jbe@81
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80 lua_getuservalue(L, 1);
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jbe@81
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81 lua_getfield(L, -1, "writebuf");
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jbe@84
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82 for (i=2; i<=top; i++) {
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jbe@84
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83 luaL_checklstring(L, i, &strlen);
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jbe@84
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84 lua_pushvalue(L, i);
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jbe@84
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85 lua_rawseti(L, -2, handle->writeqin++);
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jbe@84
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86 handle->writeleft += strlen;
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jbe@81
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87 }
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jbe@83
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88 while (handle->writeqout != handle->writeqin) {
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jbe@83
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89 lua_rawgeti(L, -1, handle->writeqout);
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jbe@81
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90 str = lua_tolstring(L, -1, &strlen);
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jbe@81
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91 strpos = handle->writeqoff;
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jbe@81
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92 while (strpos < strlen) {
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jbe@81
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93 if (strlen - strpos < MOONBR_IO_WRITEBUFLEN - handle->writebufcnt) {
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jbe@81
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94 memcpy(handle->writebuf + handle->writebufcnt, str + strpos, strlen - strpos);
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jbe@81
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95 handle->writebufcnt += strlen - strpos;
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jbe@80
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96 break;
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jbe@80
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97 } else {
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jbe@80
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98 written = 0;
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jbe@81
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99 memcpy(handle->writebuf + handle->writebufcnt, str + strpos, MOONBR_IO_WRITEBUFLEN - handle->writebufcnt);
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jbe@81
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100 strpos += MOONBR_IO_WRITEBUFLEN - handle->writebufcnt;
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jbe@80
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101 while (written < MOONBR_IO_WRITEBUFLEN) {
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jbe@80
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102 result = write(handle->fd, handle->writebuf + written, MOONBR_IO_WRITEBUFLEN - written);
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jbe@80
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103 if (result < 0) {
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jbe@81
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104 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
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jbe@81
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105 if (written) {
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jbe@81
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106 handle->writebufcnt -= written;
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jbe@81
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107 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
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jbe@81
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108 }
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jbe@81
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109 handle->writeqoff = strpos;
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jbe@81
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110 goto moonbr_io_write_impl_block;
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jbe@81
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111 } else if (errno != EINTR) {
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jbe@80
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112 moonbr_io_errmsg();
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jbe@81
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113 handle->writeerr = 1;
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jbe@80
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114 lua_pushnil(L);
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jbe@80
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115 lua_pushstring(L, errmsg);
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jbe@80
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116 return 2;
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jbe@80
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117 }
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jbe@80
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118 } else {
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jbe@80
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119 written += result;
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jbe@81
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120 handle->writeleft -= result;
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jbe@80
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121 }
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jbe@80
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122 }
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jbe@81
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123 handle->writebufcnt = 0;
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jbe@80
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124 }
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jbe@80
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125 }
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jbe@81
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126 handle->writeqoff = 0;
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jbe@81
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127 lua_pop(L, 1);
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jbe@81
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128 lua_pushnil(L);
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jbe@83
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129 lua_rawseti(L, -2, handle->writeqout++);
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jbe@80
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130 }
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jbe@81
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131 if (flush) {
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jbe@81
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132 written = 0;
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jbe@81
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133 while (written < handle->writebufcnt) {
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134 result = write(handle->fd, handle->writebuf + written, handle->writebufcnt - written);
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jbe@81
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135 if (result < 0) {
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jbe@81
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136 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
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jbe@81
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137 if (written) {
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jbe@81
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138 handle->writebufcnt -= written;
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jbe@81
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139 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
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jbe@81
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140 }
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jbe@81
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141 goto moonbr_io_write_impl_block;
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jbe@81
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142 } else if (errno != EINTR) {
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jbe@81
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143 moonbr_io_errmsg();
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jbe@81
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144 handle->writeerr = -1;
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jbe@81
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145 lua_pushnil(L);
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jbe@81
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146 lua_pushstring(L, errmsg);
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jbe@81
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147 return 2;
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jbe@81
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148 }
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jbe@81
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149 } else {
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jbe@81
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150 written += result;
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jbe@81
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151 handle->writeleft -= result;
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jbe@81
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152 }
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jbe@81
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153 }
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jbe@81
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154 handle->writebufcnt = 0;
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jbe@82
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155 if (nonblocking) lua_pushinteger(L, 0);
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jbe@81
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156 } else {
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jbe@82
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157 if (nonblocking) lua_pushinteger(L, handle->writeleft - handle->writebufcnt);
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jbe@81
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158 }
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jbe@82
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159 if (!nonblocking) lua_pushvalue(L, 1);
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jbe@80
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160 return 1;
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jbe@81
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161 moonbr_io_write_impl_block:
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jbe@81
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162 if (flush) lua_pushinteger(L, handle->writeleft);
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jbe@81
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163 else lua_pushinteger(L, handle->writeleft - handle->writebufcnt);
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jbe@81
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164 return 1;
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jbe@81
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165 }
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jbe@81
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166
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jbe@81
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167 static int moonbr_io_write(lua_State *L) {
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jbe@81
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168 return moonbr_io_write_impl(L, 0, 0);
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jbe@81
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169 }
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jbe@81
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170
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jbe@81
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171 static int moonbr_io_write_nb(lua_State *L) {
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jbe@81
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172 return moonbr_io_write_impl(L, 1, 0);
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jbe@80
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173 }
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jbe@80
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174
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jbe@80
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175 static int moonbr_io_flush(lua_State *L) {
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jbe@81
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176 return moonbr_io_write_impl(L, 0, 1);
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jbe@81
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177 }
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jbe@81
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178
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jbe@81
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179 static int moonbr_io_flush_nb(lua_State *L) {
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jbe@81
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180 return moonbr_io_write_impl(L, 1, 1);
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jbe@80
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181 }
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jbe@80
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182
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jbe@84
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183 static int moonbr_io_close_impl(lua_State *L, int clean) {
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jbe@83
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184 moonbr_io_handle_t *handle;
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jbe@83
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185 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@83
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186 if (handle->fd < 0) luaL_error(L, "Attempt to close a closed I/O handle");
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jbe@84
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187 if (clean && handle->writeleft) {
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jbe@83
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188 lua_pushcfunction(L, moonbr_io_flush);
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jbe@83
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189 lua_pushvalue(L, 1);
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jbe@83
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190 lua_call(L, 1, 2);
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jbe@83
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191 if (!lua_toboolean(L, -2)) {
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jbe@83
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192 close(handle->fd);
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jbe@83
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193 handle->fd = -1;
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jbe@83
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194 return 2;
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jbe@83
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195 }
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jbe@83
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196 }
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jbe@83
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197 if (close(handle->fd)) {
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jbe@83
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198 moonbr_io_errmsg();
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jbe@83
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199 handle->fd = -1;
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jbe@83
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200 lua_pushnil(L);
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jbe@83
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201 lua_pushstring(L, errmsg);
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jbe@83
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202 return 2;
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jbe@83
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203 }
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jbe@83
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204 handle->fd = -1;
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jbe@83
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205 lua_pushboolean(L, 1);
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jbe@83
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206 return 1;
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jbe@84
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207
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jbe@83
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208 }
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jbe@83
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209
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jbe@84
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210 static int moonbr_io_reset(lua_State *L) {
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jbe@84
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211 return moonbr_io_close_impl(L, 0);
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jbe@84
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212 }
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jbe@84
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213
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jbe@84
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214 static int moonbr_io_close(lua_State *L) {
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jbe@84
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215 return moonbr_io_close_impl(L, 1);
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jbe@84
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216 }
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jbe@84
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217
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jbe@84
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218 void moonbr_io_pushhandle(lua_State *L, int fd, int issocket) {
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jbe@79
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219 moonbr_io_handle_t *handle;
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jbe@79
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220 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
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jbe@79
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221 handle->fd = fd;
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jbe@84
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222 handle->issocket = issocket;
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jbe@81
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223 handle->nonblocking = -1;
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jbe@81
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224 handle->writeerr = 0;
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jbe@81
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225 handle->writeleft = 0;
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jbe@83
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226 handle->writeqin = 0;
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jbe@83
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227 handle->writeqout = 0;
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jbe@81
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228 handle->writeqoff = 0;
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jbe@81
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229 handle->writebufcnt = 0;
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jbe@79
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230 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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231 lua_setmetatable(L, -2);
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jbe@79
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232 lua_newtable(L); // uservalue
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jbe@81
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233 lua_newtable(L);
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jbe@81
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234 lua_setfield(L, -2, "writebuf");
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jbe@79
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235 lua_newtable(L); // public
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jbe@79
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236 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
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jbe@79
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237 lua_setmetatable(L, -2);
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jbe@79
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238 lua_setfield(L, -2, "public");
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jbe@79
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239 lua_setuservalue(L, -2);
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jbe@79
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240 }
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jbe@79
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241
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jbe@79
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242 static int moonbr_io_handleindex(lua_State *L) {
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jbe@80
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243 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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244 lua_getuservalue(L, 1);
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jbe@79
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245 lua_getfield(L, -1, "public");
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jbe@79
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246 lua_pushvalue(L, 2);
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jbe@79
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247 lua_gettable(L, -2);
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jbe@79
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248 return 1;
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jbe@79
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249 }
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jbe@79
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250
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jbe@79
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251 static int moonbr_io_handlenewindex(lua_State *L) {
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jbe@80
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252 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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253 lua_getuservalue(L, 1);
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jbe@79
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254 lua_getfield(L, -1, "public");
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jbe@79
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255 lua_pushvalue(L, 2);
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jbe@79
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256 lua_pushvalue(L, 3);
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jbe@79
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257 lua_settable(L, -3);
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jbe@79
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258 return 0;
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jbe@79
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259 }
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jbe@79
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260
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jbe@80
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261 static int moonbr_io_handlegc(lua_State *L) {
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jbe@80
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262 moonbr_io_handle_t *handle;
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jbe@80
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263 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@80
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264 if (handle->fd >= 0) {
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jbe@80
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265 lua_getuservalue(L, 1);
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jbe@80
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266 lua_getfield(L, -1, "gc");
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jbe@80
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267 lua_pushvalue(L, 1);
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jbe@80
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268 lua_call(L, 1, 0);
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jbe@80
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269 }
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jbe@80
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270 return 0;
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jbe@80
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271 }
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jbe@80
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272
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jbe@79
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273 static int moonbr_io_getdummy(lua_State *L) {
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jbe@80
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274 moonbr_io_pushhandle(L, 2, 0);
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jbe@79
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275 return 1;
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jbe@79
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276 }
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jbe@79
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277
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jbe@79
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278 static const struct luaL_Reg moonbr_io_handle_methods[] = {
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jbe@84
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279 {"reset", moonbr_io_reset},
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jbe@80
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280 {"close", moonbr_io_close},
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jbe@80
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281 {"write", moonbr_io_write},
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jbe@81
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282 {"write_nb", moonbr_io_write_nb},
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jbe@80
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283 {"flush", moonbr_io_flush},
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jbe@81
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284 {"flush_nb", moonbr_io_flush_nb},
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jbe@79
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285 {NULL, NULL}
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jbe@79
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286 };
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jbe@79
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287
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jbe@79
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288 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
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jbe@79
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289 {"__index", moonbr_io_handleindex},
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jbe@79
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290 {"__newindex", moonbr_io_handlenewindex},
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jbe@80
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291 {"__gc", moonbr_io_handlegc},
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jbe@79
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292 {NULL, NULL}
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jbe@79
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293 };
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jbe@79
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294
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jbe@79
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295 static const struct luaL_Reg moonbr_io_module_funcs[] = {
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jbe@79
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296 {"getdummy", moonbr_io_getdummy},
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jbe@79
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297 {NULL, NULL}
|
jbe@79
|
298 };
|
jbe@79
|
299
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jbe@79
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300 int luaopen_moonbridge_io(lua_State *L) {
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jbe@79
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301
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jbe@80
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302 lua_newtable(L); // module
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jbe@80
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303
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jbe@79
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304 lua_newtable(L); // public metatable
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jbe@79
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305 lua_newtable(L); // handle methods
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jbe@79
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306 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
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jbe@80
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307 lua_pushvalue(L, -1);
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jbe@80
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308 lua_setfield(L, -4, "handle");
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jbe@79
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309 lua_setfield(L, -2, "__index");
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jbe@79
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310 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
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jbe@79
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311
|
jbe@79
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312 lua_newtable(L); // handle metatable
|
jbe@79
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313 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
|
jbe@79
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314 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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315
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jbe@79
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316 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
|
jbe@79
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317 return 1;
|
jbe@79
|
318
|
jbe@79
|
319 }
|
jbe@79
|
320
|