1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#include "elua_private.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
/* bytecode caching */
static Eina_File *
check_bc(Eina_File *of, const char *fname, Eina_Bool *bc)
{
if (of)
{
struct stat bc_stat, sc_stat;
/* original file doesn't exist, only bytecode does, use bytecode */
if (stat(fname, &sc_stat) < 0)
return of;
if (stat(eina_file_filename_get(of), &bc_stat) < 0)
{
/* what? */
eina_file_close(of);
goto generate;
}
/* bytecode is newer than original file, use bytecode */
if (bc_stat.st_mtime > sc_stat.st_mtime)
return of;
/* bytecode is not new enough; trigger regeneration */
eina_file_close(of);
}
generate:
*bc = EINA_TRUE;
return eina_file_open(fname, EINA_FALSE);
}
static Eina_File *
open_src(const char *fname, Eina_Bool *bc)
{
Eina_File *f = NULL;
const char *ext = strstr(fname, ".lua");
if (ext && !ext[4])
{
char buf[PATH_MAX];
snprintf(buf, sizeof(buf), "%sc", fname);
f = check_bc(eina_file_open(buf, EINA_FALSE), fname, bc);
}
if (!f) f = eina_file_open(fname, EINA_FALSE);
return f;
}
static int
writef(lua_State *L EINA_UNUSED, const void *p, size_t size, void *ud)
{
FILE *f = ud;
return ferror(f) || (fwrite(p, 1, size, f) != size);
}
static FILE *
bc_tmp_open(const char *fname, char *buf, size_t buflen)
{
int fd;
#ifndef _WIN32
mode_t old_umask;
#endif
char *fs = strrchr(fname, '/'), *bs = strrchr(fname, '\\');
if (!fs && !bs)
snprintf(buf, buflen, "./XXXXXX");
else
{
char *ss = (fs > bs) ? fs : bs;
snprintf(buf, buflen, "%.*sXXXXXX", (int)(ss - fname + 1), fname);
}
#ifndef _WIN32
old_umask = umask(S_IRWXG|S_IRWXO);
#endif
fd = mkstemp(buf);
#ifndef _WIN32
umask(old_umask);
#endif
if (fd < 0)
return NULL;
return fdopen(fd, "wb");
}
static void
write_bc(lua_State *L, const char *fname)
{
FILE *f;
char buf[PATH_MAX];
if ((f = bc_tmp_open(fname, buf, sizeof(buf))))
{
char buf2[PATH_MAX];
if (lua_dump(L, writef, f))
{
fclose(f);
/* there really is nothing to handle here */
(void)!!remove(buf);
}
else fclose(f);
snprintf(buf2, sizeof(buf2), "%sc", fname);
if (rename(buf, buf2))
{
/* a futile attempt at cleanup */
(void)!!remove(buf);
(void)!!remove(buf2);
}
}
}
static const char *
getf(lua_State *L EINA_UNUSED, void *ud, size_t *size)
{
char *buff = *((char**)ud);
if (feof(stdin)) return NULL;
*size = fread(buff, 1, LUAL_BUFFERSIZE, stdin);
return (*size > 0) ? buff : NULL;
}
static int
elua_loadstdin(lua_State *L)
{
char buff[LUAL_BUFFERSIZE];
int status = lua_load(L, getf, &buff, "=stdin");
if (ferror(stdin))
{
lua_pop(L, 1);
lua_pushfstring(L, "cannot read stdin: %s", strerror(errno));
return LUA_ERRFILE;
}
return status;
}
typedef struct Map_Stream
{
char *fmap;
size_t flen;
} Map_Stream;
static const char *
getf_map(lua_State *L EINA_UNUSED, void *ud, size_t *size)
{
Map_Stream *s = ud;
const char *fmap = s->fmap;
*size = s->flen;
/* gotta null it - tell luajit to terminate reading */
s->fmap = NULL;
return fmap;
}
EAPI int
elua_io_loadfile(const Elua_State *es, const char *fname)
{
Map_Stream s;
int status;
Eina_File *f;
const char *chname;
Eina_Bool bcache = EINA_FALSE;
lua_State *L;
if (!es || !es->luastate) return -1;
L = es->luastate;
if (!fname)
{
return elua_loadstdin(L);
}
if (!(f = open_src(fname, &bcache)))
{
lua_pushfstring(L, "cannot open %s: %s", fname, strerror(errno));
return LUA_ERRFILE;
}
chname = lua_pushfstring(L, "@%s", fname);
s.flen = eina_file_size_get(f);
if (!(s.fmap = eina_file_map_all(f, EINA_FILE_RANDOM)))
{
lua_pushfstring(L, "cannot read %s: %s", chname + 1, strerror(errno));
lua_remove(L, -2);
return LUA_ERRFILE;
}
status = lua_load(L, getf_map, &s, chname);
eina_file_map_free(f, s.fmap);
eina_file_close(f);
if (!status && bcache) write_bc(L, fname);
lua_remove(L, -2);
return status;
}
/* lua function */
static int
loadfile(lua_State *L)
{
Elua_State *es = elua_state_from_lua_state_get(L);
const char *fname = luaL_optstring(L, 1, NULL);
int status = elua_io_loadfile(es, fname),
hasenv = (lua_gettop(L) >= 3);
if (!status)
{
if (hasenv)
{
lua_pushvalue(L, 3);
lua_setfenv(L, -2);
}
return 1;
}
lua_pushnil(L);
lua_insert(L, -2);
return 2;
}
Eina_Bool
_elua_state_io_setup(const Elua_State *es)
{
EINA_SAFETY_ON_FALSE_RETURN_VAL(es && es->luastate, EINA_FALSE);
lua_pushcfunction(es->luastate, loadfile);
lua_setglobal(es->luastate, "loadfile");
return EINA_TRUE;
}
|
