264 lines
7.7 KiB
C
264 lines
7.7 KiB
C
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include "data.h"
|
|
#include "iolib.h"
|
|
|
|
static void ghostDestroy(void* g);
|
|
naGhostType naIOGhostType = { ghostDestroy, "iofile" };
|
|
|
|
static struct naIOGhost* ioghost(naRef r)
|
|
{
|
|
if(naGhost_type(r) == &naIOGhostType && IOGHOST(r)->handle)
|
|
return naGhost_ptr(r);
|
|
return 0;
|
|
}
|
|
|
|
static naRef f_close(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
|
|
if(!g) naRuntimeError(c, "bad argument to close()");
|
|
if(g->handle) g->type->close(c, g->handle);
|
|
g->handle = 0;
|
|
return naNil();
|
|
}
|
|
|
|
static naRef f_read(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
struct naIOGhost* g = argc > 0 ? ioghost(args[0]) : 0;
|
|
naRef str = argc > 1 ? args[1] : naNil();
|
|
naRef len = argc > 2 ? naNumValue(args[2]) : naNil();
|
|
if(!g || !MUTABLE(str) || !IS_NUM(len))
|
|
naRuntimeError(c, "bad argument to read()");
|
|
if(naStr_len(str) < (int)len.num)
|
|
naRuntimeError(c, "string not big enough for read");
|
|
return naNum(g->type->read(c, g->handle, naStr_data(str),
|
|
(int)len.num));
|
|
}
|
|
|
|
static naRef f_write(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
struct naIOGhost* g = argc > 0 ? ioghost(args[0]) : 0;
|
|
naRef str = argc > 1 ? args[1] : naNil();
|
|
if(!g || !IS_STR(str))
|
|
naRuntimeError(c, "bad argument to write()");
|
|
return naNum(g->type->write(c, g->handle, naStr_data(str),
|
|
naStr_len(str)));
|
|
}
|
|
|
|
static naRef f_seek(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
struct naIOGhost* g = argc > 0 ? ioghost(args[0]) : 0;
|
|
naRef pos = argc > 1 ? naNumValue(args[1]) : naNil();
|
|
naRef whn = argc > 2 ? naNumValue(args[2]) : naNil();
|
|
if(!g || !IS_NUM(pos) || !IS_NUM(whn))
|
|
naRuntimeError(c, "bad argument to seek()");
|
|
g->type->seek(c, g->handle, (int)pos.num, (int)whn.num);
|
|
return naNil();
|
|
}
|
|
|
|
static naRef f_tell(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
|
|
if(!g)
|
|
naRuntimeError(c, "bad argument to tell()");
|
|
return naNum(g->type->tell(c, g->handle));
|
|
}
|
|
|
|
static naRef f_flush(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
|
|
if(!g)
|
|
naRuntimeError(c, "bad argument to flush()");
|
|
g->type->flush(c, g->handle);
|
|
return naNil();
|
|
}
|
|
|
|
static void ghostDestroy(void* g)
|
|
{
|
|
struct naIOGhost* io = (struct naIOGhost*)g;
|
|
io->type->destroy(io->handle);
|
|
naFree(io);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// stdio library implementation below:
|
|
|
|
static void ioclose(naContext c, void* f)
|
|
{
|
|
if(f)
|
|
if(fclose(f) != 0 && c) naRuntimeError(c, strerror(errno));
|
|
}
|
|
|
|
static int ioread(naContext c, void* f, char* buf, unsigned int len)
|
|
{
|
|
int n;
|
|
naModUnlock(); n = fread(buf, 1, len, f); naModLock();
|
|
if(n < len && !feof((FILE*)f)) naRuntimeError(c, strerror(errno));
|
|
return n;
|
|
}
|
|
|
|
static int iowrite(naContext c, void* f, char* buf, unsigned int len)
|
|
{
|
|
int n;
|
|
naModUnlock(); n = fwrite(buf, 1, len, f); naModLock();
|
|
if(ferror((FILE*)f)) naRuntimeError(c, strerror(errno));
|
|
return n;
|
|
}
|
|
|
|
static void ioseek(naContext c, void* f, unsigned int off, int whence)
|
|
{
|
|
if(fseek(f, off, whence) != 0) naRuntimeError(c, strerror(errno));
|
|
}
|
|
|
|
static int iotell(naContext c, void* f)
|
|
{
|
|
int n = ftell(f);
|
|
if(n < 0) naRuntimeError(c, strerror(errno));
|
|
return n;
|
|
}
|
|
|
|
static void ioflush(naContext c, void* f)
|
|
{
|
|
if(fflush(f)) naRuntimeError(c, strerror(errno));
|
|
}
|
|
|
|
static void iodestroy(void* f)
|
|
{
|
|
if(f != stdin && f != stdout && f != stderr)
|
|
ioclose(0, f);
|
|
}
|
|
|
|
struct naIOType naStdIOType = { ioclose, ioread, iowrite, ioseek,
|
|
iotell, ioflush, iodestroy };
|
|
|
|
naRef naIOGhost(naContext c, FILE* f)
|
|
{
|
|
struct naIOGhost* ghost = naAlloc(sizeof(struct naIOGhost));
|
|
ghost->type = &naStdIOType;
|
|
ghost->handle = f;
|
|
return naNewGhost(c, &naIOGhostType, ghost);
|
|
}
|
|
|
|
static naRef f_open(naContext c, naRef me, int argc, naRef* args)
|
|
{
|
|
FILE* f;
|
|
naRef file = argc > 0 ? naStringValue(c, args[0]) : naNil();
|
|
naRef mode = argc > 1 ? naStringValue(c, args[1]) : naNil();
|
|
if(!IS_STR(file)) naRuntimeError(c, "bad argument to open()");
|
|
f = fopen(naStr_data(file), IS_STR(mode) ? naStr_data(mode) : "rb");
|
|
if(!f) naRuntimeError(c, strerror(errno));
|
|
return naIOGhost(c, f);
|
|
}
|
|
|
|
// frees buffer before tossing an error
|
|
static int getcguard(naContext ctx, FILE* f, void* buf)
|
|
{
|
|
int c;
|
|
naModUnlock(); c = fgetc(f); naModLock();
|
|
if(ferror(f)) {
|
|
naFree(buf);
|
|
naRuntimeError(ctx, strerror(errno));
|
|
}
|
|
return c;
|
|
}
|
|
|
|
// Handles multiple EOL conventions by using stdio's ungetc. Will not
|
|
// work for other IO types without converting them to FILE* with
|
|
// fdopen() or whatnot...
|
|
static naRef f_readln(naContext ctx, naRef me, int argc, naRef* args)
|
|
{
|
|
naRef result;
|
|
struct naIOGhost* g = argc==1 ? ioghost(args[0]) : 0;
|
|
int i=0, c, sz = 128;
|
|
char *buf;
|
|
if(!g || g->type != &naStdIOType)
|
|
naRuntimeError(ctx, "bad argument to readln()");
|
|
buf = naAlloc(sz);
|
|
while(1) {
|
|
c = getcguard(ctx, g->handle, buf);
|
|
if(c == EOF || c == '\n') break;
|
|
if(c == '\r') {
|
|
int c2 = getcguard(ctx, g->handle, buf);
|
|
if(c2 != EOF && c2 != '\n')
|
|
if(EOF == ungetc(c2, g->handle))
|
|
break;
|
|
break;
|
|
}
|
|
buf[i++] = c;
|
|
if(i >= sz) buf = naRealloc(buf, sz *= 2);
|
|
}
|
|
result = c == EOF ? naNil() : naStr_fromdata(naNewString(ctx), buf, i);
|
|
naFree(buf);
|
|
return result;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
#define S_ISLNK(m) 0
|
|
#define S_ISSOCK(m) 0
|
|
#endif
|
|
#ifdef _MSC_VER
|
|
#define S_ISREG(m) (((m)&_S_IFMT)==_S_IFREG)
|
|
#define S_ISDIR(m) (((m)&_S_IFMT)==_S_IFDIR)
|
|
#define S_ISCHR(m) (((m)&_S_IFMT)==_S_IFCHR)
|
|
#define S_ISFIFO(m) (((m)&_S_IFMT)==_S_IFIFO)
|
|
#define S_ISBLK(m) 0
|
|
typedef unsigned short mode_t;
|
|
#endif
|
|
static naRef ftype(naContext ctx, mode_t m)
|
|
{
|
|
const char* t = "unk";
|
|
if(S_ISREG(m)) t = "reg";
|
|
else if(S_ISDIR(m)) t = "dir"; else if(S_ISCHR(m)) t = "chr";
|
|
else if(S_ISBLK(m)) t = "blk"; else if(S_ISFIFO(m)) t = "fifo";
|
|
else if(S_ISLNK(m)) t = "lnk"; else if(S_ISSOCK(m)) t = "sock";
|
|
return naStr_fromdata(naNewString(ctx), t, strlen(t));
|
|
}
|
|
|
|
static naRef f_stat(naContext ctx, naRef me, int argc, naRef* args)
|
|
{
|
|
int n=0;
|
|
struct stat s;
|
|
naRef result, path = argc > 0 ? naStringValue(ctx, args[0]) : naNil();
|
|
if(!IS_STR(path)) naRuntimeError(ctx, "bad argument to stat()");
|
|
if(stat(naStr_data(path), &s) < 0) {
|
|
if(errno == ENOENT) return naNil();
|
|
naRuntimeError(ctx, strerror(errno));
|
|
}
|
|
result = naNewVector(ctx);
|
|
naVec_setsize(ctx, result, 12);
|
|
#define FLD(x) naVec_set(result, n++, naNum(s.st_##x));
|
|
FLD(dev); FLD(ino); FLD(mode); FLD(nlink); FLD(uid); FLD(gid);
|
|
FLD(rdev); FLD(size); FLD(atime); FLD(mtime); FLD(ctime);
|
|
#undef FLD
|
|
naVec_set(result, n++, ftype(ctx, s.st_mode));
|
|
return result;
|
|
}
|
|
|
|
static naCFuncItem funcs[] = {
|
|
{ "close", f_close },
|
|
{ "read", f_read },
|
|
{ "write", f_write },
|
|
{ "seek", f_seek },
|
|
{ "tell", f_tell },
|
|
{ "flush", f_flush },
|
|
{ "open", f_open },
|
|
{ "readln", f_readln },
|
|
{ "stat", f_stat },
|
|
{ 0 }
|
|
};
|
|
|
|
naRef naInit_io(naContext c)
|
|
{
|
|
naRef ns = naGenLib(c, funcs);
|
|
naAddSym(c, ns, "SEEK_SET", naNum(SEEK_SET));
|
|
naAddSym(c, ns, "SEEK_CUR", naNum(SEEK_CUR));
|
|
naAddSym(c, ns, "SEEK_END", naNum(SEEK_END));
|
|
naAddSym(c, ns, "stdin", naIOGhost(c, stdin));
|
|
naAddSym(c, ns, "stdout", naIOGhost(c, stdout));
|
|
naAddSym(c, ns, "stderr", naIOGhost(c, stderr));
|
|
return ns;
|
|
}
|