rev |
line source |
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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jbe@79
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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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jbe@80
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22 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
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jbe@80
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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@81
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31 int nonblocking;
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jbe@81
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32 int writeerr;
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jbe@83
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33 size_t writeleft;
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jbe@83
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34 #if LUA_VERSION_NUM >= 503
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jbe@83
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35 lua_Integer writeqin;
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jbe@83
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36 lua_Integer writeqout;
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jbe@83
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37 #else
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jbe@83
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38 int writeqin;
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jbe@83
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39 int writeqout;
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jbe@83
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40 #endif
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jbe@83
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41 size_t writeqoff;
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jbe@81
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42 int writebufcnt;
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jbe@80
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43 char writebuf[MOONBR_IO_WRITEBUFLEN];
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jbe@79
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44 } moonbr_io_handle_t;
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jbe@79
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45
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jbe@83
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46 int moonbr_io_isclosed(lua_State *L, int idx) {
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jbe@83
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47 moonbr_io_handle_t *handle;
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jbe@83
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48 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@83
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49 return handle->fd < 0;
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jbe@83
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50 }
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jbe@83
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51
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jbe@83
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52 void moonbr_io_markclosed(lua_State *L, int idx) {
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jbe@83
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53 moonbr_io_handle_t *handle;
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jbe@83
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54 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@83
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55 handle->fd = -1;
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jbe@83
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56 }
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jbe@83
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57
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jbe@81
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58 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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59 if (handle->nonblocking != nonblocking) {
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jbe@81
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60 int flags;
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jbe@81
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61 flags = fcntl(handle->fd, F_GETFL, 0);
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jbe@81
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62 if (flags == -1) {
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jbe@81
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63 moonbr_io_errmsg();
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jbe@81
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64 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
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jbe@81
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65 }
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jbe@81
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66 if (nonblocking) flags |= O_NONBLOCK;
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jbe@81
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67 else flags &= ~O_NONBLOCK;
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jbe@81
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68 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
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jbe@81
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69 moonbr_io_errmsg();
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jbe@81
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70 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
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jbe@81
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71 }
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jbe@81
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72 }
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jbe@81
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73 }
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jbe@81
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74
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jbe@81
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75 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
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jbe@80
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76 moonbr_io_handle_t *handle;
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jbe@80
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77 int i, top;
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jbe@80
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78 const char *str;
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jbe@81
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79 size_t strlen, strpos;
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jbe@80
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80 size_t written;
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jbe@80
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81 ssize_t result;
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jbe@80
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82 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@83
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83 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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84 if (handle->writeerr) {
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jbe@80
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85 lua_pushnil(L);
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jbe@80
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86 lua_pushliteral(L, "Previous write error");
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jbe@80
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87 return 2;
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jbe@80
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88 }
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jbe@81
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89 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
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jbe@81
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90 if (!flush) top = lua_gettop(L);
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jbe@81
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91 lua_getuservalue(L, 1);
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jbe@81
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92 lua_getfield(L, -1, "writebuf");
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jbe@81
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93 if (!flush) {
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jbe@81
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94 for (i=2; i<=top; i++) {
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jbe@81
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95 luaL_checklstring(L, i, &strlen);
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jbe@81
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96 lua_pushvalue(L, i);
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jbe@83
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97 lua_rawseti(L, -2, handle->writeqin++);
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jbe@81
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98 handle->writeleft += strlen;
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99 }
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jbe@81
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100 }
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jbe@83
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101 while (handle->writeqout != handle->writeqin) {
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jbe@83
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102 lua_rawgeti(L, -1, handle->writeqout);
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jbe@81
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103 str = lua_tolstring(L, -1, &strlen);
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104 strpos = handle->writeqoff;
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jbe@81
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105 while (strpos < strlen) {
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jbe@81
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106 if (strlen - strpos < MOONBR_IO_WRITEBUFLEN - handle->writebufcnt) {
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jbe@81
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107 memcpy(handle->writebuf + handle->writebufcnt, str + strpos, strlen - strpos);
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jbe@81
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108 handle->writebufcnt += strlen - strpos;
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jbe@80
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109 break;
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jbe@80
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110 } else {
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jbe@80
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111 written = 0;
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jbe@81
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112 memcpy(handle->writebuf + handle->writebufcnt, str + strpos, MOONBR_IO_WRITEBUFLEN - handle->writebufcnt);
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jbe@81
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113 strpos += MOONBR_IO_WRITEBUFLEN - handle->writebufcnt;
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jbe@80
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114 while (written < MOONBR_IO_WRITEBUFLEN) {
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jbe@80
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115 result = write(handle->fd, handle->writebuf + written, MOONBR_IO_WRITEBUFLEN - written);
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jbe@80
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116 if (result < 0) {
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jbe@81
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117 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
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jbe@81
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118 if (written) {
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jbe@81
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119 handle->writebufcnt -= written;
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jbe@81
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120 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
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jbe@81
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121 }
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jbe@81
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122 handle->writeqoff = strpos;
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jbe@81
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123 goto moonbr_io_write_impl_block;
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jbe@81
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124 } else if (errno != EINTR) {
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jbe@80
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125 moonbr_io_errmsg();
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jbe@81
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126 handle->writeerr = 1;
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jbe@80
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127 lua_pushnil(L);
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jbe@80
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128 lua_pushstring(L, errmsg);
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jbe@80
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129 return 2;
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jbe@80
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130 }
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jbe@80
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131 } else {
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jbe@80
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132 written += result;
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jbe@81
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133 handle->writeleft -= result;
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jbe@80
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134 }
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jbe@80
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135 }
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jbe@81
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136 handle->writebufcnt = 0;
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jbe@80
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137 }
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jbe@80
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138 }
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jbe@81
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139 handle->writeqoff = 0;
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jbe@81
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140 lua_pop(L, 1);
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jbe@81
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141 lua_pushnil(L);
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jbe@83
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142 lua_rawseti(L, -2, handle->writeqout++);
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jbe@80
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143 }
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jbe@81
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144 if (flush) {
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jbe@81
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145 written = 0;
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jbe@81
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146 while (written < handle->writebufcnt) {
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jbe@81
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147 result = write(handle->fd, handle->writebuf + written, handle->writebufcnt - written);
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jbe@81
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148 if (result < 0) {
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jbe@81
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149 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
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jbe@81
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150 if (written) {
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jbe@81
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151 handle->writebufcnt -= written;
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jbe@81
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152 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
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jbe@81
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153 }
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jbe@81
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154 goto moonbr_io_write_impl_block;
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jbe@81
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155 } else if (errno != EINTR) {
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jbe@81
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156 moonbr_io_errmsg();
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jbe@81
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157 handle->writeerr = -1;
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jbe@81
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158 lua_pushnil(L);
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jbe@81
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159 lua_pushstring(L, errmsg);
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jbe@81
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160 return 2;
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jbe@81
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161 }
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jbe@81
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162 } else {
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jbe@81
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163 written += result;
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jbe@81
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164 handle->writeleft -= result;
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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 handle->writebufcnt = 0;
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jbe@82
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168 if (nonblocking) lua_pushinteger(L, 0);
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jbe@81
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169 } else {
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jbe@82
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170 if (nonblocking) lua_pushinteger(L, handle->writeleft - handle->writebufcnt);
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jbe@81
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171 }
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jbe@82
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172 if (!nonblocking) lua_pushvalue(L, 1);
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jbe@80
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173 return 1;
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jbe@81
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174 moonbr_io_write_impl_block:
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jbe@81
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175 if (flush) lua_pushinteger(L, handle->writeleft);
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jbe@81
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176 else lua_pushinteger(L, handle->writeleft - handle->writebufcnt);
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jbe@81
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177 return 1;
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jbe@81
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178 }
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jbe@81
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179
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jbe@81
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180 static int moonbr_io_write(lua_State *L) {
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jbe@81
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181 return moonbr_io_write_impl(L, 0, 0);
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jbe@81
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182 }
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jbe@81
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183
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jbe@81
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184 static int moonbr_io_write_nb(lua_State *L) {
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jbe@81
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185 return moonbr_io_write_impl(L, 1, 0);
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jbe@80
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186 }
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jbe@80
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187
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jbe@80
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188 static int moonbr_io_flush(lua_State *L) {
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jbe@81
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189 return moonbr_io_write_impl(L, 0, 1);
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jbe@81
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190 }
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jbe@81
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191
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jbe@81
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192 static int moonbr_io_flush_nb(lua_State *L) {
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jbe@81
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193 return moonbr_io_write_impl(L, 1, 1);
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jbe@80
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194 }
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jbe@80
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195
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jbe@83
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196 static int moonbr_io_close(lua_State *L) {
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jbe@83
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197 moonbr_io_handle_t *handle;
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jbe@83
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198 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@83
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199 if (handle->fd < 0) luaL_error(L, "Attempt to close a closed I/O handle");
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jbe@83
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200 if (handle->writeleft) {
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jbe@83
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201 lua_pushcfunction(L, moonbr_io_flush);
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jbe@83
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202 lua_pushvalue(L, 1);
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jbe@83
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203 lua_call(L, 1, 2);
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jbe@83
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204 if (!lua_toboolean(L, -2)) {
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jbe@83
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205 close(handle->fd);
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jbe@83
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206 handle->fd = -1;
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jbe@83
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207 return 2;
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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@83
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210 if (close(handle->fd)) {
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jbe@83
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211 moonbr_io_errmsg();
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jbe@83
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212 handle->fd = -1;
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jbe@83
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213 lua_pushnil(L);
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jbe@83
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214 lua_pushstring(L, errmsg);
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jbe@83
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215 return 2;
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jbe@83
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216 }
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jbe@83
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217 handle->fd = -1;
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jbe@83
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218 lua_pushboolean(L, 1);
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jbe@83
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219 return 1;
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jbe@83
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220 }
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jbe@83
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221
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jbe@80
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222 void moonbr_io_pushhandle(lua_State *L, int fd, int gc_idx) {
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jbe@79
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223 moonbr_io_handle_t *handle;
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jbe@79
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224 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
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jbe@79
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225 handle->fd = fd;
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jbe@81
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226 handle->nonblocking = -1;
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jbe@81
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227 handle->writeerr = 0;
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jbe@81
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228 handle->writeleft = 0;
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jbe@83
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229 handle->writeqin = 0;
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jbe@83
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230 handle->writeqout = 0;
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jbe@81
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231 handle->writeqoff = 0;
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jbe@81
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232 handle->writebufcnt = 0;
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jbe@79
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233 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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234 lua_setmetatable(L, -2);
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jbe@79
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235 lua_newtable(L); // uservalue
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jbe@81
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236 lua_newtable(L);
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jbe@81
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237 lua_setfield(L, -2, "writebuf");
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jbe@80
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238 if (gc_idx) lua_pushvalue(L, gc_idx);
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jbe@80
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239 else lua_pushcfunction(L, moonbr_io_close);
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jbe@80
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240 lua_setfield(L, -2, "gc");
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jbe@79
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241 lua_newtable(L); // public
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jbe@79
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242 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
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jbe@79
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243 lua_setmetatable(L, -2);
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jbe@79
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244 lua_setfield(L, -2, "public");
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jbe@79
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245 lua_setuservalue(L, -2);
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jbe@79
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246 }
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jbe@79
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247
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jbe@79
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248 static int moonbr_io_handleindex(lua_State *L) {
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jbe@80
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249 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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250 lua_getuservalue(L, 1);
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jbe@79
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251 lua_getfield(L, -1, "public");
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jbe@79
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252 lua_pushvalue(L, 2);
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jbe@79
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253 lua_gettable(L, -2);
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jbe@79
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254 return 1;
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jbe@79
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255 }
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jbe@79
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256
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jbe@79
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257 static int moonbr_io_handlenewindex(lua_State *L) {
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jbe@80
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258 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@79
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259 lua_getuservalue(L, 1);
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jbe@79
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260 lua_getfield(L, -1, "public");
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jbe@79
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261 lua_pushvalue(L, 2);
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jbe@79
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262 lua_pushvalue(L, 3);
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jbe@79
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263 lua_settable(L, -3);
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jbe@79
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264 return 0;
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jbe@79
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265 }
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jbe@79
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266
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jbe@80
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267 static int moonbr_io_handlegc(lua_State *L) {
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jbe@80
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268 moonbr_io_handle_t *handle;
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jbe@80
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269 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
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jbe@80
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270 if (handle->fd >= 0) {
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jbe@80
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271 lua_getuservalue(L, 1);
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jbe@80
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272 lua_getfield(L, -1, "gc");
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jbe@80
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273 lua_pushvalue(L, 1);
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jbe@80
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274 lua_call(L, 1, 0);
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jbe@80
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275 }
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jbe@80
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276 return 0;
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jbe@80
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277 }
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jbe@80
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278
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jbe@79
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279 static int moonbr_io_getdummy(lua_State *L) {
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jbe@80
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280 moonbr_io_pushhandle(L, 2, 0);
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jbe@79
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281 return 1;
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jbe@79
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282 }
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jbe@79
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283
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jbe@79
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284 static const struct luaL_Reg moonbr_io_handle_methods[] = {
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jbe@80
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285 {"close", moonbr_io_close},
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jbe@80
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286 {"write", moonbr_io_write},
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jbe@81
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287 {"write_nb", moonbr_io_write_nb},
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jbe@80
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288 {"flush", moonbr_io_flush},
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jbe@81
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289 {"flush_nb", moonbr_io_flush_nb},
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jbe@79
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290 {NULL, NULL}
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jbe@79
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291 };
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jbe@79
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292
|
jbe@79
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293 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
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jbe@79
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294 {"__index", moonbr_io_handleindex},
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jbe@79
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295 {"__newindex", moonbr_io_handlenewindex},
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jbe@80
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296 {"__gc", moonbr_io_handlegc},
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jbe@79
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297 {NULL, NULL}
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jbe@79
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298 };
|
jbe@79
|
299
|
jbe@79
|
300 static const struct luaL_Reg moonbr_io_module_funcs[] = {
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jbe@79
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301 {"getdummy", moonbr_io_getdummy},
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jbe@79
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302 {NULL, NULL}
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jbe@79
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303 };
|
jbe@79
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304
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jbe@79
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305 int luaopen_moonbridge_io(lua_State *L) {
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jbe@79
|
306
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jbe@80
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307 lua_newtable(L); // module
|
jbe@80
|
308
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jbe@79
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309 lua_newtable(L); // public metatable
|
jbe@79
|
310 lua_newtable(L); // handle methods
|
jbe@79
|
311 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
|
jbe@80
|
312 lua_pushvalue(L, -1);
|
jbe@80
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313 lua_setfield(L, -4, "handle");
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jbe@79
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314 lua_setfield(L, -2, "__index");
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jbe@79
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315 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
|
jbe@79
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316
|
jbe@79
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317 lua_newtable(L); // handle metatable
|
jbe@79
|
318 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
|
jbe@79
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319 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
|
jbe@79
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320
|
jbe@79
|
321 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
|
jbe@79
|
322 return 1;
|
jbe@79
|
323
|
jbe@79
|
324 }
|
jbe@79
|
325
|