cpython/Mac/fopenRF.c

400 lines
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C
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1994-05-06 11:16:55 -03:00
/*
* fopenRF.c -- Clone of fopen.c to open Mac resource forks.
*
* Copyright (c) 1989 Symantec Corporation. All rights reserved.
*
*/
#include "stdio.h"
#include "errno.h"
#include "string.h"
#include "ansi_private.h"
FILE *fopenRF(char *, char *);
FILE *freopenRF(char *, char *, FILE *);
FILE *__openRF(char *, int, int, FILE *);
#include <Files.h>
#define fcbVPtr(fcb) (* (VCB **) (fcb + 20))
#define fcbDirID(fcb) (* (long *) (fcb + 58))
#define fcbCName(fcb) (fcb + 62)
static void setfiletype(StringPtr, int);
static void stdio_exit(void);
static int fileio(FILE *, int);
static int close(FILE *);
static void replace(unsigned char *, size_t, int, int);
FILE *
fopenRF(filename, mode)
char *filename, *mode;
{
return(freopenRF(filename, mode, __getfile()));
}
FILE *
freopenRF(filename, mode, fp)
char *filename;
register char *mode;
register FILE *fp;
{
int omode, oflag;
/* interpret "rwa" */
if (mode[0] == 'r') {
omode = fsRdPerm;
oflag = 0;
}
else if (mode[0] == 'w') {
omode = fsWrPerm;
oflag = F_CREAT+F_TRUNC;
}
else if (mode[0] == 'a') {
omode = fsWrPerm;
oflag = F_CREAT+F_APPEND;
}
else {
errno = EINVAL;
return(NULL);
}
/* interpret "b+" */
if (mode[1] == 'b') {
oflag |= F_BINARY;
if (mode[2] == '+')
omode = fsRdWrPerm;
}
else if (mode[1] == '+') {
omode = fsRdWrPerm;
if (mode[2] == 'b')
oflag |= F_BINARY;
}
/* open the file */
return(__openRF(filename, omode, oflag, fp));
}
FILE *
__openRF(filename, omode, oflag, fp)
char *filename;
int omode, oflag;
register FILE *fp;
{
ioParam pb;
char pname[FILENAME_MAX];
if (fp == NULL)
return(NULL);
fclose(fp);
/* set up pb */
pb.ioNamePtr = __c2p(filename, pname);
pb.ioVRefNum = 0;
pb.ioVersNum = 0;
pb.ioPermssn = omode;
pb.ioMisc = 0;
/* create file */
if (oflag & F_CREAT) {
asm {
lea pb,a0
_PBCreate
}
if (pb.ioResult == noErr)
oflag &= ~F_TRUNC;
else if (pb.ioResult == dupFNErr && !(oflag & F_EXCL))
oflag &= ~F_CREAT;
else {
errno = pb.ioResult;
return(NULL);
}
}
/* open resource file */
asm {
lea pb,a0
_PBOpenRF
}
if (pb.ioResult) {
errno = pb.ioResult;
if (oflag & F_CREAT) asm {
lea pb,a0
_PBDelete
}
return(NULL);
}
fp->refnum = pb.ioRefNum;
/* get/set file length */
if (oflag & F_TRUNC) asm {
lea pb,a0
_PBSetEOF
}
else if (!(oflag & F_CREAT)) asm {
lea pb,a0
_PBGetEOF
}
fp->len = (fpos_t) pb.ioMisc;
/* initialize rest of FILE structure */
if (oflag & F_APPEND) {
fp->append = 1;
fp->pos = fp->len;
}
if (oflag & F_BINARY)
fp->binary = 1;
setvbuf(fp, NULL, _IOFBF, BUFSIZ);
fp->proc = fileio;
/* set file type */
if (oflag & (F_CREAT|F_TRUNC))
setfiletype(pb.ioNamePtr, oflag);
/* done */
__atexit_stdio(stdio_exit);
return(fp);
}
/*
* setfiletype - set type/creator of new file
*
*/
static void
setfiletype(name, oflag)
StringPtr name;
int oflag;
{
fileParam pb;
pb.ioNamePtr = name;
pb.ioVRefNum = 0;
pb.ioFVersNum = 0;
pb.ioFDirIndex = 0;
asm {
lea pb,a0
_PBGetFInfo
bmi.s @1
}
pb.ioFlFndrInfo.fdType = pb.ioFlFndrInfo.fdCreator = '????';
if (!(oflag & F_BINARY))
pb.ioFlFndrInfo.fdType = 'TEXT';
asm {
lea pb,a0
_PBSetFInfo
@1 }
}
/*
* stdio_exit - stdio shutdown routine
*
*/
static void
stdio_exit()
{
register FILE *fp;
int n;
for (fp = &__file[0], n = FOPEN_MAX; n--; fp++)
fclose(fp);
}
/*
* fileio - I/O handler proc for files and devices
*
*/
static int
fileio(fp, i)
register FILE *fp;
int i;
{
ioParam pb;
pb.ioRefNum = fp->refnum;
switch (i) {
/* read */
case 0:
pb.ioBuffer = (Ptr) fp->ptr;
pb.ioReqCount = fp->cnt;
pb.ioPosMode = fp->refnum > 0 ? fsFromStart : fsAtMark;
pb.ioPosOffset = fp->pos - fp->cnt;
asm {
lea pb,a0
_PBRead
}
if (pb.ioResult == eofErr) {
fp->pos = pb.ioPosOffset;
if (fp->cnt = pb.ioActCount)
pb.ioResult = 0;
else {
fp->eof = 1;
return(EOF);
}
}
if (pb.ioResult) {
fp->pos -= fp->cnt;
fp->cnt = 0;
}
else if (!fp->binary)
replace(fp->ptr, fp->cnt, '\r', '\n');
break;
/* write */
case 1:
pb.ioBuffer = (Ptr) fp->ptr;
pb.ioReqCount = fp->cnt;
pb.ioPosMode = fp->refnum > 0 ? fsFromStart : fsAtMark;
if ((pb.ioPosOffset = fp->pos - fp->cnt) > fp->len) {
pb.ioMisc = (Ptr) pb.ioPosOffset;
asm {
lea pb,a0
_PBSetEOF
bmi.s @1
}
}
if (!fp->binary)
replace(fp->ptr, fp->cnt, '\n', '\r');
asm {
lea pb,a0
_PBWrite
@1 }
if (pb.ioResult) {
fp->pos -= fp->cnt;
fp->cnt = 0;
}
else if (pb.ioPosOffset > fp->len)
fp->len = pb.ioPosOffset;
break;
/* close */
case 2:
pb.ioResult = close(fp);
break;
}
/* done */
if (pb.ioResult) {
fp->err = 1;
errno = pb.ioResult;
return(EOF);
}
return(0);
}
static int
close(fp)
register FILE *fp;
{
HFileParam pb;
Str255 buf;
register char *fcb = FCBSPtr + fp->refnum;
VCB *vcb = fcbVPtr(fcb);
register char *s;
pb.ioNamePtr = buf;
pb.ioFRefNum = fp->refnum;
pb.ioVRefNum = vcb->vcbVRefNum;
pb.ioFVersNum = 0;
/* close temporary file - HFS */
if (fp->delete && vcb->vcbSigWord == 0x4244) {
pb.ioDirID = fcbDirID(fcb);
s = fcbCName(fcb);
asm {
lea buf,a0
moveq #0,d0
move.b (s),d0
@1 move.b (s)+,(a0)+
dbra d0,@1
lea pb,a0
_PBClose
bmi.s @9
_PBHDelete
}
}
/* close temporary file - MFS */
else if (fp->delete && vcb->vcbSigWord == 0xD2D7) {
pb.ioFDirIndex = 1;
do asm {
lea pb,a0
_PBGetFInfo
bmi.s @2
addq.w #1,pb.ioFDirIndex
} while (pb.ioFRefNum != fp->refnum);
asm {
lea pb,a0
_PBClose
bmi.s @9
_PBDelete
}
}
/* normal case - just close file */
else {
asm {
@2 lea pb,a0
_PBClose
bmi.s @9
}
}
/* flush volume buffer */
pb.ioNamePtr = 0;
asm {
lea pb,a0
_PBFlshVol
@9 }
return(pb.ioResult);
}
/*
* replace - routine for doing CR/LF conversion
*
*/
static void
replace(s, n, c1, c2)
register unsigned char *s;
register size_t n;
register int c1, c2;
{
register unsigned char *t;
for (; n && (t = memchr(s, c1, n)); s = t) {
*t++ = c2;
n -= t - s;
}
}