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Diffstat (limited to 'Build/source/libs/luajit/LuaJIT-src/src/lib_io.c')
-rw-r--r--Build/source/libs/luajit/LuaJIT-src/src/lib_io.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/Build/source/libs/luajit/LuaJIT-src/src/lib_io.c b/Build/source/libs/luajit/LuaJIT-src/src/lib_io.c
new file mode 100644
index 00000000000..2aa834746e1
--- /dev/null
+++ b/Build/source/libs/luajit/LuaJIT-src/src/lib_io.c
@@ -0,0 +1,541 @@
+/*
+** I/O library.
+** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
+**
+** Major portions taken verbatim or adapted from the Lua interpreter.
+** Copyright (C) 1994-2011 Lua.org, PUC-Rio. See Copyright Notice in lua.h
+*/
+
+#include <errno.h>
+#include <stdio.h>
+
+#define lib_io_c
+#define LUA_LIB
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+
+#include "lj_obj.h"
+#include "lj_gc.h"
+#include "lj_err.h"
+#include "lj_buf.h"
+#include "lj_str.h"
+#include "lj_state.h"
+#include "lj_strfmt.h"
+#include "lj_ff.h"
+#include "lj_lib.h"
+
+/* Userdata payload for I/O file. */
+typedef struct IOFileUD {
+ FILE *fp; /* File handle. */
+ uint32_t type; /* File type. */
+} IOFileUD;
+
+#define IOFILE_TYPE_FILE 0 /* Regular file. */
+#define IOFILE_TYPE_PIPE 1 /* Pipe. */
+#define IOFILE_TYPE_STDF 2 /* Standard file handle. */
+#define IOFILE_TYPE_MASK 3
+
+#define IOFILE_FLAG_CLOSE 4 /* Close after io.lines() iterator. */
+
+#define IOSTDF_UD(L, id) (&gcref(G(L)->gcroot[(id)])->ud)
+#define IOSTDF_IOF(L, id) ((IOFileUD *)uddata(IOSTDF_UD(L, (id))))
+
+/* -- Open/close helpers -------------------------------------------------- */
+
+static IOFileUD *io_tofilep(lua_State *L)
+{
+ if (!(L->base < L->top && tvisudata(L->base) &&
+ udataV(L->base)->udtype == UDTYPE_IO_FILE))
+ lj_err_argtype(L, 1, "FILE*");
+ return (IOFileUD *)uddata(udataV(L->base));
+}
+
+static IOFileUD *io_tofile(lua_State *L)
+{
+ IOFileUD *iof = io_tofilep(L);
+ if (iof->fp == NULL)
+ lj_err_caller(L, LJ_ERR_IOCLFL);
+ return iof;
+}
+
+static FILE *io_stdfile(lua_State *L, ptrdiff_t id)
+{
+ IOFileUD *iof = IOSTDF_IOF(L, id);
+ if (iof->fp == NULL)
+ lj_err_caller(L, LJ_ERR_IOSTDCL);
+ return iof->fp;
+}
+
+static IOFileUD *io_file_new(lua_State *L)
+{
+ IOFileUD *iof = (IOFileUD *)lua_newuserdata(L, sizeof(IOFileUD));
+ GCudata *ud = udataV(L->top-1);
+ ud->udtype = UDTYPE_IO_FILE;
+ /* NOBARRIER: The GCudata is new (marked white). */
+ setgcrefr(ud->metatable, curr_func(L)->c.env);
+ iof->fp = NULL;
+ iof->type = IOFILE_TYPE_FILE;
+ return iof;
+}
+
+static IOFileUD *io_file_open(lua_State *L, const char *mode)
+{
+ const char *fname = strdata(lj_lib_checkstr(L, 1));
+ IOFileUD *iof = io_file_new(L);
+ iof->fp = fopen(fname, mode);
+ if (iof->fp == NULL)
+ luaL_argerror(L, 1, lj_strfmt_pushf(L, "%s: %s", fname, strerror(errno)));
+ return iof;
+}
+
+static int io_file_close(lua_State *L, IOFileUD *iof)
+{
+ int ok;
+ if ((iof->type & IOFILE_TYPE_MASK) == IOFILE_TYPE_FILE) {
+ ok = (fclose(iof->fp) == 0);
+ } else if ((iof->type & IOFILE_TYPE_MASK) == IOFILE_TYPE_PIPE) {
+ int stat = -1;
+#if LJ_TARGET_POSIX
+ stat = pclose(iof->fp);
+#elif LJ_TARGET_WINDOWS && !LJ_TARGET_XBOXONE
+ stat = _pclose(iof->fp);
+#else
+ lua_assert(0);
+ return 0;
+#endif
+#if LJ_52
+ iof->fp = NULL;
+ return luaL_execresult(L, stat);
+#else
+ ok = (stat != -1);
+#endif
+ } else {
+ lua_assert((iof->type & IOFILE_TYPE_MASK) == IOFILE_TYPE_STDF);
+ setnilV(L->top++);
+ lua_pushliteral(L, "cannot close standard file");
+ return 2;
+ }
+ iof->fp = NULL;
+ return luaL_fileresult(L, ok, NULL);
+}
+
+/* -- Read/write helpers -------------------------------------------------- */
+
+static int io_file_readnum(lua_State *L, FILE *fp)
+{
+ lua_Number d;
+ if (fscanf(fp, LUA_NUMBER_SCAN, &d) == 1) {
+ if (LJ_DUALNUM) {
+ int32_t i = lj_num2int(d);
+ if (d == (lua_Number)i && !tvismzero((cTValue *)&d)) {
+ setintV(L->top++, i);
+ return 1;
+ }
+ }
+ setnumV(L->top++, d);
+ return 1;
+ } else {
+ setnilV(L->top++);
+ return 0;
+ }
+}
+
+static int io_file_readline(lua_State *L, FILE *fp, MSize chop)
+{
+ MSize m = LUAL_BUFFERSIZE, n = 0, ok = 0;
+ char *buf;
+ for (;;) {
+ buf = lj_buf_tmp(L, m);
+ if (fgets(buf+n, m-n, fp) == NULL) break;
+ n += (MSize)strlen(buf+n);
+ ok |= n;
+ if (n && buf[n-1] == '\n') { n -= chop; break; }
+ if (n >= m - 64) m += m;
+ }
+ setstrV(L, L->top++, lj_str_new(L, buf, (size_t)n));
+ lj_gc_check(L);
+ return (int)ok;
+}
+
+static void io_file_readall(lua_State *L, FILE *fp)
+{
+ MSize m, n;
+ for (m = LUAL_BUFFERSIZE, n = 0; ; m += m) {
+ char *buf = lj_buf_tmp(L, m);
+ n += (MSize)fread(buf+n, 1, m-n, fp);
+ if (n != m) {
+ setstrV(L, L->top++, lj_str_new(L, buf, (size_t)n));
+ lj_gc_check(L);
+ return;
+ }
+ }
+}
+
+static int io_file_readlen(lua_State *L, FILE *fp, MSize m)
+{
+ if (m) {
+ char *buf = lj_buf_tmp(L, m);
+ MSize n = (MSize)fread(buf, 1, m, fp);
+ setstrV(L, L->top++, lj_str_new(L, buf, (size_t)n));
+ lj_gc_check(L);
+ return (n > 0 || m == 0);
+ } else {
+ int c = getc(fp);
+ ungetc(c, fp);
+ setstrV(L, L->top++, &G(L)->strempty);
+ return (c != EOF);
+ }
+}
+
+static int io_file_read(lua_State *L, FILE *fp, int start)
+{
+ int ok, n, nargs = (int)(L->top - L->base) - start;
+ clearerr(fp);
+ if (nargs == 0) {
+ ok = io_file_readline(L, fp, 1);
+ n = start+1; /* Return 1 result. */
+ } else {
+ /* The results plus the buffers go on top of the args. */
+ luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
+ ok = 1;
+ for (n = start; nargs-- && ok; n++) {
+ if (tvisstr(L->base+n)) {
+ const char *p = strVdata(L->base+n);
+ if (p[0] != '*')
+ lj_err_arg(L, n+1, LJ_ERR_INVOPT);
+ if (p[1] == 'n')
+ ok = io_file_readnum(L, fp);
+ else if ((p[1] & ~0x20) == 'L')
+ ok = io_file_readline(L, fp, (p[1] == 'l'));
+ else if (p[1] == 'a')
+ io_file_readall(L, fp);
+ else
+ lj_err_arg(L, n+1, LJ_ERR_INVFMT);
+ } else if (tvisnumber(L->base+n)) {
+ ok = io_file_readlen(L, fp, (MSize)lj_lib_checkint(L, n+1));
+ } else {
+ lj_err_arg(L, n+1, LJ_ERR_INVOPT);
+ }
+ }
+ }
+ if (ferror(fp))
+ return luaL_fileresult(L, 0, NULL);
+ if (!ok)
+ setnilV(L->top-1); /* Replace last result with nil. */
+ return n - start;
+}
+
+static int io_file_write(lua_State *L, FILE *fp, int start)
+{
+ cTValue *tv;
+ int status = 1;
+ for (tv = L->base+start; tv < L->top; tv++) {
+ char buf[STRFMT_MAXBUF_NUM];
+ MSize len;
+ const char *p = lj_strfmt_wstrnum(buf, tv, &len);
+ if (!p)
+ lj_err_argt(L, (int)(tv - L->base) + 1, LUA_TSTRING);
+ status = status && (fwrite(p, 1, len, fp) == len);
+ }
+ if (LJ_52 && status) {
+ L->top = L->base+1;
+ if (start == 0)
+ setudataV(L, L->base, IOSTDF_UD(L, GCROOT_IO_OUTPUT));
+ return 1;
+ }
+ return luaL_fileresult(L, status, NULL);
+}
+
+static int io_file_iter(lua_State *L)
+{
+ GCfunc *fn = curr_func(L);
+ IOFileUD *iof = uddata(udataV(&fn->c.upvalue[0]));
+ int n = fn->c.nupvalues - 1;
+ if (iof->fp == NULL)
+ lj_err_caller(L, LJ_ERR_IOCLFL);
+ L->top = L->base;
+ if (n) { /* Copy upvalues with options to stack. */
+ if (n > LUAI_MAXCSTACK)
+ lj_err_caller(L, LJ_ERR_STKOV);
+ lj_state_checkstack(L, (MSize)n);
+ memcpy(L->top, &fn->c.upvalue[1], n*sizeof(TValue));
+ L->top += n;
+ }
+ n = io_file_read(L, iof->fp, 0);
+ if (ferror(iof->fp))
+ lj_err_callermsg(L, strVdata(L->top-2));
+ if (tvisnil(L->base) && (iof->type & IOFILE_FLAG_CLOSE)) {
+ io_file_close(L, iof); /* Return values are ignored. */
+ return 0;
+ }
+ return n;
+}
+
+static int io_file_lines(lua_State *L)
+{
+ int n = (int)(L->top - L->base);
+ if (n > LJ_MAX_UPVAL)
+ lj_err_caller(L, LJ_ERR_UNPACK);
+ lua_pushcclosure(L, io_file_iter, n);
+ return 1;
+}
+
+/* -- I/O file methods ---------------------------------------------------- */
+
+#define LJLIB_MODULE_io_method
+
+LJLIB_CF(io_method_close)
+{
+ IOFileUD *iof = L->base < L->top ? io_tofile(L) :
+ IOSTDF_IOF(L, GCROOT_IO_OUTPUT);
+ return io_file_close(L, iof);
+}
+
+LJLIB_CF(io_method_read)
+{
+ return io_file_read(L, io_tofile(L)->fp, 1);
+}
+
+LJLIB_CF(io_method_write) LJLIB_REC(io_write 0)
+{
+ return io_file_write(L, io_tofile(L)->fp, 1);
+}
+
+LJLIB_CF(io_method_flush) LJLIB_REC(io_flush 0)
+{
+ return luaL_fileresult(L, fflush(io_tofile(L)->fp) == 0, NULL);
+}
+
+LJLIB_CF(io_method_seek)
+{
+ FILE *fp = io_tofile(L)->fp;
+ int opt = lj_lib_checkopt(L, 2, 1, "\3set\3cur\3end");
+ int64_t ofs = 0;
+ cTValue *o;
+ int res;
+ if (opt == 0) opt = SEEK_SET;
+ else if (opt == 1) opt = SEEK_CUR;
+ else if (opt == 2) opt = SEEK_END;
+ o = L->base+2;
+ if (o < L->top) {
+ if (tvisint(o))
+ ofs = (int64_t)intV(o);
+ else if (tvisnum(o))
+ ofs = (int64_t)numV(o);
+ else if (!tvisnil(o))
+ lj_err_argt(L, 3, LUA_TNUMBER);
+ }
+#if LJ_TARGET_POSIX
+ res = fseeko(fp, ofs, opt);
+#elif _MSC_VER >= 1400
+ res = _fseeki64(fp, ofs, opt);
+#elif defined(__MINGW32__)
+ res = fseeko64(fp, ofs, opt);
+#else
+ res = fseek(fp, (long)ofs, opt);
+#endif
+ if (res)
+ return luaL_fileresult(L, 0, NULL);
+#if LJ_TARGET_POSIX
+ ofs = ftello(fp);
+#elif _MSC_VER >= 1400
+ ofs = _ftelli64(fp);
+#elif defined(__MINGW32__)
+ ofs = ftello64(fp);
+#else
+ ofs = (int64_t)ftell(fp);
+#endif
+ setint64V(L->top-1, ofs);
+ return 1;
+}
+
+LJLIB_CF(io_method_setvbuf)
+{
+ FILE *fp = io_tofile(L)->fp;
+ int opt = lj_lib_checkopt(L, 2, -1, "\4full\4line\2no");
+ size_t sz = (size_t)lj_lib_optint(L, 3, LUAL_BUFFERSIZE);
+ if (opt == 0) opt = _IOFBF;
+ else if (opt == 1) opt = _IOLBF;
+ else if (opt == 2) opt = _IONBF;
+ return luaL_fileresult(L, setvbuf(fp, NULL, opt, sz) == 0, NULL);
+}
+
+LJLIB_CF(io_method_lines)
+{
+ io_tofile(L);
+ return io_file_lines(L);
+}
+
+LJLIB_CF(io_method___gc)
+{
+ IOFileUD *iof = io_tofilep(L);
+ if (iof->fp != NULL && (iof->type & IOFILE_TYPE_MASK) != IOFILE_TYPE_STDF)
+ io_file_close(L, iof);
+ return 0;
+}
+
+LJLIB_CF(io_method___tostring)
+{
+ IOFileUD *iof = io_tofilep(L);
+ if (iof->fp != NULL)
+ lua_pushfstring(L, "file (%p)", iof->fp);
+ else
+ lua_pushliteral(L, "file (closed)");
+ return 1;
+}
+
+LJLIB_PUSH(top-1) LJLIB_SET(__index)
+
+#include "lj_libdef.h"
+
+/* -- I/O library functions ----------------------------------------------- */
+
+#define LJLIB_MODULE_io
+
+LJLIB_PUSH(top-2) LJLIB_SET(!) /* Set environment. */
+
+LJLIB_CF(io_open)
+{
+ const char *fname = strdata(lj_lib_checkstr(L, 1));
+ GCstr *s = lj_lib_optstr(L, 2);
+ const char *mode = s ? strdata(s) : "r";
+ IOFileUD *iof = io_file_new(L);
+ iof->fp = fopen(fname, mode);
+ return iof->fp != NULL ? 1 : luaL_fileresult(L, 0, fname);
+}
+
+LJLIB_CF(io_popen)
+{
+#if LJ_TARGET_POSIX || (LJ_TARGET_WINDOWS && !LJ_TARGET_XBOXONE)
+ const char *fname = strdata(lj_lib_checkstr(L, 1));
+ GCstr *s = lj_lib_optstr(L, 2);
+ const char *mode = s ? strdata(s) : "r";
+ IOFileUD *iof = io_file_new(L);
+ iof->type = IOFILE_TYPE_PIPE;
+#if LJ_TARGET_POSIX
+ fflush(NULL);
+ iof->fp = popen(fname, mode);
+#else
+ iof->fp = _popen(fname, mode);
+#endif
+ return iof->fp != NULL ? 1 : luaL_fileresult(L, 0, fname);
+#else
+ return luaL_error(L, LUA_QL("popen") " not supported");
+#endif
+}
+
+LJLIB_CF(io_tmpfile)
+{
+ IOFileUD *iof = io_file_new(L);
+#if LJ_TARGET_PS3 || LJ_TARGET_PS4 || LJ_TARGET_PSVITA
+ iof->fp = NULL; errno = ENOSYS;
+#else
+ iof->fp = tmpfile();
+#endif
+ return iof->fp != NULL ? 1 : luaL_fileresult(L, 0, NULL);
+}
+
+LJLIB_CF(io_close)
+{
+ return lj_cf_io_method_close(L);
+}
+
+LJLIB_CF(io_read)
+{
+ return io_file_read(L, io_stdfile(L, GCROOT_IO_INPUT), 0);
+}
+
+LJLIB_CF(io_write) LJLIB_REC(io_write GCROOT_IO_OUTPUT)
+{
+ return io_file_write(L, io_stdfile(L, GCROOT_IO_OUTPUT), 0);
+}
+
+LJLIB_CF(io_flush) LJLIB_REC(io_flush GCROOT_IO_OUTPUT)
+{
+ return luaL_fileresult(L, fflush(io_stdfile(L, GCROOT_IO_OUTPUT)) == 0, NULL);
+}
+
+static int io_std_getset(lua_State *L, ptrdiff_t id, const char *mode)
+{
+ if (L->base < L->top && !tvisnil(L->base)) {
+ if (tvisudata(L->base)) {
+ io_tofile(L);
+ L->top = L->base+1;
+ } else {
+ io_file_open(L, mode);
+ }
+ /* NOBARRIER: The standard I/O handles are GC roots. */
+ setgcref(G(L)->gcroot[id], gcV(L->top-1));
+ } else {
+ setudataV(L, L->top++, IOSTDF_UD(L, id));
+ }
+ return 1;
+}
+
+LJLIB_CF(io_input)
+{
+ return io_std_getset(L, GCROOT_IO_INPUT, "r");
+}
+
+LJLIB_CF(io_output)
+{
+ return io_std_getset(L, GCROOT_IO_OUTPUT, "w");
+}
+
+LJLIB_CF(io_lines)
+{
+ if (L->base == L->top) setnilV(L->top++);
+ if (!tvisnil(L->base)) { /* io.lines(fname) */
+ IOFileUD *iof = io_file_open(L, "r");
+ iof->type = IOFILE_TYPE_FILE|IOFILE_FLAG_CLOSE;
+ L->top--;
+ setudataV(L, L->base, udataV(L->top));
+ } else { /* io.lines() iterates over stdin. */
+ setudataV(L, L->base, IOSTDF_UD(L, GCROOT_IO_INPUT));
+ }
+ return io_file_lines(L);
+}
+
+LJLIB_CF(io_type)
+{
+ cTValue *o = lj_lib_checkany(L, 1);
+ if (!(tvisudata(o) && udataV(o)->udtype == UDTYPE_IO_FILE))
+ setnilV(L->top++);
+ else if (((IOFileUD *)uddata(udataV(o)))->fp != NULL)
+ lua_pushliteral(L, "file");
+ else
+ lua_pushliteral(L, "closed file");
+ return 1;
+}
+
+#include "lj_libdef.h"
+
+/* ------------------------------------------------------------------------ */
+
+static GCobj *io_std_new(lua_State *L, FILE *fp, const char *name)
+{
+ IOFileUD *iof = (IOFileUD *)lua_newuserdata(L, sizeof(IOFileUD));
+ GCudata *ud = udataV(L->top-1);
+ ud->udtype = UDTYPE_IO_FILE;
+ /* NOBARRIER: The GCudata is new (marked white). */
+ setgcref(ud->metatable, gcV(L->top-3));
+ iof->fp = fp;
+ iof->type = IOFILE_TYPE_STDF;
+ lua_setfield(L, -2, name);
+ return obj2gco(ud);
+}
+
+LUALIB_API int luaopen_io(lua_State *L)
+{
+ LJ_LIB_REG(L, NULL, io_method);
+ copyTV(L, L->top, L->top-1); L->top++;
+ lua_setfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE);
+ LJ_LIB_REG(L, LUA_IOLIBNAME, io);
+ setgcref(G(L)->gcroot[GCROOT_IO_INPUT], io_std_new(L, stdin, "stdin"));
+ setgcref(G(L)->gcroot[GCROOT_IO_OUTPUT], io_std_new(L, stdout, "stdout"));
+ io_std_new(L, stderr, "stderr");
+ return 1;
+}
+