9 static void ghostDestroy(void* g);
10 naGhostType naIOGhostType = { ghostDestroy };
12 static struct naIOGhost* ioghost(naRef r)
14 if(naGhost_type(r) == &naIOGhostType && IOGHOST(r)->handle)
15 return naGhost_ptr(r);
19 static naRef f_close(naContext c, naRef me, int argc, naRef* args)
21 struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
22 if(!g) naRuntimeError(c, "bad argument to close()");
23 if(g->handle) g->type->close(c, g->handle);
28 static naRef f_read(naContext c, naRef me, int argc, naRef* args)
30 struct naIOGhost* g = argc > 0 ? ioghost(args[0]) : 0;
31 naRef str = argc > 1 ? args[1] : naNil();
32 naRef len = argc > 2 ? naNumValue(args[2]) : naNil();
33 if(!g || !MUTABLE(str) || !IS_NUM(len))
34 naRuntimeError(c, "bad argument to read()");
35 if(PTR(str).str->len < (int)len.num)
36 naRuntimeError(c, "string not big enough for read");
37 return naNum(g->type->read(c, g->handle, (char*)PTR(str).str->data,
41 static naRef f_write(naContext c, naRef me, int argc, naRef* args)
43 struct naIOGhost* g = argc > 0 ? ioghost(args[0]) : 0;
44 naRef str = argc > 1 ? args[1] : naNil();
45 if(!g || !IS_STR(str))
46 naRuntimeError(c, "bad argument to write()");
47 return naNum(g->type->write(c, g->handle, (char*)PTR(str).str->data,
51 static naRef f_seek(naContext c, naRef me, int argc, naRef* args)
53 struct naIOGhost* g = argc > 0 ? ioghost(args[0]) : 0;
54 naRef pos = argc > 1 ? naNumValue(args[1]) : naNil();
55 naRef whn = argc > 2 ? naNumValue(args[2]) : naNil();
56 if(!g || !IS_NUM(pos) || !IS_NUM(whn))
57 naRuntimeError(c, "bad argument to seek()");
58 g->type->seek(c, g->handle, (int)pos.num, (int)whn.num);
62 static naRef f_tell(naContext c, naRef me, int argc, naRef* args)
64 struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
66 naRuntimeError(c, "bad argument to tell()");
67 return naNum(g->type->tell(c, g->handle));
70 static void ghostDestroy(void* g)
72 struct naIOGhost* io = (struct naIOGhost*)g;
73 io->type->destroy(io->handle);
77 ////////////////////////////////////////////////////////////////////////
78 // stdio library implementation below:
80 static void ioclose(naContext c, void* f)
83 if(fclose(f) != 0 && c) naRuntimeError(c, strerror(errno));
86 static int ioread(naContext c, void* f, char* buf, unsigned int len)
89 naModUnlock(); n = fread(buf, 1, len, f); naModLock();
90 if(n < len && !feof((FILE*)f)) naRuntimeError(c, strerror(errno));
94 static int iowrite(naContext c, void* f, char* buf, unsigned int len)
97 naModUnlock(); n = fwrite(buf, 1, len, f); naModLock();
98 if(ferror((FILE*)f)) naRuntimeError(c, strerror(errno));
102 static void ioseek(naContext c, void* f, unsigned int off, int whence)
104 if(fseek(f, off, whence) != 0) naRuntimeError(c, strerror(errno));
107 static int iotell(naContext c, void* f)
110 if(n < 0) naRuntimeError(c, strerror(errno));
114 static void iodestroy(void* f)
116 if(f != stdin && f != stdout && f != stderr)
120 struct naIOType naStdIOType = { ioclose, ioread, iowrite, ioseek,
123 naRef naIOGhost(naContext c, FILE* f)
125 struct naIOGhost* ghost = naAlloc(sizeof(struct naIOGhost));
126 ghost->type = &naStdIOType;
128 return naNewGhost(c, &naIOGhostType, ghost);
131 static naRef f_open(naContext c, naRef me, int argc, naRef* args)
134 naRef file = argc > 0 ? naStringValue(c, args[0]) : naNil();
135 naRef mode = argc > 1 ? naStringValue(c, args[1]) : naNil();
136 if(!IS_STR(file)) naRuntimeError(c, "bad argument to open()");
137 f = fopen((char*)PTR(file).str->data,
138 IS_STR(mode) ? (const char*)PTR(mode).str->data : "rb");
139 if(!f) naRuntimeError(c, strerror(errno));
140 return naIOGhost(c, f);
143 // frees buffer before tossing an error
144 static int getcguard(naContext ctx, FILE* f, void* buf)
147 naModUnlock(); c = fgetc(f); naModLock();
150 naRuntimeError(ctx, strerror(errno));
155 // Handles multiple EOL conventions by using stdio's ungetc. Will not
156 // work for other IO types without converting them to FILE* with
157 // fdopen() or whatnot...
158 static naRef f_readln(naContext ctx, naRef me, int argc, naRef* args)
161 struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
164 if(!g || g->type != &naStdIOType)
165 naRuntimeError(ctx, "bad argument to readln()");
168 c = getcguard(ctx, g->handle, buf);
169 if(c == EOF || c == '\n') break;
171 char c2 = getcguard(ctx, g->handle, buf);
172 if(c2 != EOF && c2 != '\n')
173 if(EOF == ungetc(c2, g->handle))
178 if(i >= sz) buf = naRealloc(buf, sz *= 2);
180 result = c == EOF ? naNil() : naStr_fromdata(naNewString(ctx), buf, i);
185 static naRef f_stat(naContext ctx, naRef me, int argc, naRef* args)
189 naRef result, path = argc > 0 ? naStringValue(ctx, args[0]) : naNil();
190 if(!IS_STR(path)) naRuntimeError(ctx, "bad argument to stat()");
191 if(stat((char*)PTR(path).str->data, &s) < 0) {
192 if(errno == ENOENT) return naNil();
193 naRuntimeError(ctx, strerror(errno));
195 result = naNewVector(ctx);
196 naVec_setsize(result, 11);
197 #define FLD(x) naVec_set(result, n++, naNum(s.st_##x));
198 FLD(dev); FLD(ino); FLD(mode); FLD(nlink); FLD(uid); FLD(gid);
199 FLD(rdev); FLD(size); FLD(atime); FLD(mtime); FLD(ctime);
204 static naCFuncItem funcs[] = {
205 { "close", f_close },
207 { "write", f_write },
211 { "readln", f_readln },
216 naRef naInit_io(naContext c)
218 naRef ns = naGenLib(c, funcs);
219 naAddSym(c, ns, "SEEK_SET", naNum(SEEK_SET));
220 naAddSym(c, ns, "SEEK_CUR", naNum(SEEK_CUR));
221 naAddSym(c, ns, "SEEK_END", naNum(SEEK_END));
222 naAddSym(c, ns, "stdin", naIOGhost(c, stdin));
223 naAddSym(c, ns, "stdout", naIOGhost(c, stdout));
224 naAddSym(c, ns, "stderr", naIOGhost(c, stderr));