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Moved here because it is think-specific
This commit is contained in:
Jack Jansen
parent
63bf598217
commit
fc596038a5
336
Mac/think/fopenRF.c
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336
Mac/think/fopenRF.c
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@ -0,0 +1,336 @@
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/*
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* fopen.c
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*
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* Copyright (c) 1991 Symantec Corporation. All rights reserved.
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*
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*/
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#include <MacHeaders>
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#include "stdio.h"
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#include "errno.h"
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#include "string.h"
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#include "ansi_private.h"
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extern long _ftype, _fcreator;
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#define fcbVPtr(fcb) (* (VCB **) (fcb + 20))
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#define fcbDirID(fcb) (* (long *) (fcb + 58))
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#define fcbCName(fcb) (fcb + 62)
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static void setfiletype(StringPtr, int);
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static void stdio_exit(void);
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static int fileio(FILE *, int);
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static int close(FILE *);
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static void replace(unsigned char *, size_t, int, int);
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FILE *freopenRF();
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FILE *__openRF();
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FILE *
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fopenRF(const char *filename, const char *mode)
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{
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return(freopenRF(filename, mode, __getfile()));
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}
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FILE *
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freopenRF(const char *filename, const char *mode, FILE *fp)
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{
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int omode, oflag;
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/* interpret "rwa" */
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if (mode[0] == 'r') {
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omode = fsRdPerm;
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oflag = 0;
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}
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else if (mode[0] == 'w') {
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omode = fsWrPerm;
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oflag = F_CREAT+F_TRUNC;
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}
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else if (mode[0] == 'a') {
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omode = fsWrPerm;
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oflag = F_CREAT+F_APPEND;
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}
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else {
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errno = EINVAL;
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return(NULL);
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}
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/* interpret "b+" */
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if (mode[1] == 'b') {
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oflag |= F_BINARY;
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if (mode[2] == '+')
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omode = fsRdWrPerm;
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}
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else if (mode[1] == '+') {
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omode = fsRdWrPerm;
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if (mode[2] == 'b')
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oflag |= F_BINARY;
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}
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/* open the file */
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return(__openRF(filename, omode, oflag, fp));
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}
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FILE *
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__openRF(const char *filename, int omode, int oflag, FILE *fp)
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{
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IOParam pb;
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char pname[FILENAME_MAX];
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if (fp == NULL)
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return(NULL);
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fclose(fp);
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/* set up pb */
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pb.ioNamePtr = __c2p(filename, pname);
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pb.ioVRefNum = 0;
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pb.ioVersNum = 0;
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pb.ioPermssn = omode;
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pb.ioMisc = 0;
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/* create file */
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if (oflag & F_CREAT) {
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PBCreateSync((ParmBlkPtr)&pb);
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if (pb.ioResult == noErr)
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oflag &= ~F_TRUNC;
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else if (pb.ioResult == dupFNErr && !(oflag & F_EXCL))
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oflag &= ~F_CREAT;
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else {
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errno = pb.ioResult;
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return(NULL);
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}
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}
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/* open file */
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PBOpenRFSync((ParmBlkPtr)&pb);
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if (pb.ioResult) {
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errno = pb.ioResult;
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if (oflag & F_CREAT)
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PBDeleteSync((ParmBlkPtr)&pb);
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return(NULL);
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}
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fp->refnum = pb.ioRefNum;
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/* get/set file length */
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if (oflag & F_TRUNC)
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PBSetEOFSync((ParmBlkPtr)&pb);
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else if (!(oflag & F_CREAT))
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PBGetEOFSync((ParmBlkPtr)&pb);
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fp->len = (fpos_t) pb.ioMisc;
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/* initialize rest of FILE structure */
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if (oflag & F_APPEND) {
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fp->append = 1;
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fp->pos = fp->len;
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}
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if (oflag & F_BINARY)
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fp->binary = 1;
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setvbuf(fp, NULL, _IOFBF, BUFSIZ);
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fp->proc = fileio;
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/* set file type */
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if (oflag & (F_CREAT|F_TRUNC))
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setfiletype(pb.ioNamePtr, oflag);
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/* done */
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__atexit_stdio(stdio_exit);
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return(fp);
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}
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/*
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* setfiletype - set type/creator of new file
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*
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*/
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static void
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setfiletype(StringPtr name, int oflag)
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{
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FileParam pb;
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pb.ioNamePtr = name;
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pb.ioVRefNum = 0;
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pb.ioFVersNum = 0;
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pb.ioFDirIndex = 0;
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if (PBGetFInfoSync((ParmBlkPtr)&pb) == noErr) {
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if (oflag & F_BINARY)
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pb.ioFlFndrInfo.fdType = _ftype;
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else
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pb.ioFlFndrInfo.fdType = 'TEXT';
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pb.ioFlFndrInfo.fdCreator = _fcreator;
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PBSetFInfoSync((ParmBlkPtr)&pb);
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}
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}
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/*
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* stdio_exit - stdio shutdown routine
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*
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*/
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static void
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stdio_exit(void)
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{
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register FILE *fp;
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int n;
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for (fp = &__file[0], n = FOPEN_MAX; n--; fp++)
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fclose(fp);
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}
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/*
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* fileio - I/O handler proc for files and devices
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*
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*/
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static int
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fileio(FILE *fp, int i)
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{
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IOParam pb;
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pb.ioRefNum = fp->refnum;
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switch (i) {
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/* read */
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case 0:
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pb.ioBuffer = (Ptr) fp->ptr;
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pb.ioReqCount = fp->cnt;
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pb.ioPosMode = fp->refnum > 0 ? fsFromStart : fsAtMark;
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pb.ioPosOffset = fp->pos - fp->cnt;
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PBReadSync((ParmBlkPtr)&pb);
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if (pb.ioResult == eofErr) {
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fp->pos = pb.ioPosOffset;
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if (fp->cnt = pb.ioActCount)
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pb.ioResult = 0;
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else {
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fp->eof = 1;
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return(EOF);
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}
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}
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if (!pb.ioResult && !fp->binary)
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replace(fp->ptr, fp->cnt, '\r', '\n');
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break;
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/* write */
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case 1:
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pb.ioBuffer = (Ptr) fp->ptr;
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pb.ioReqCount = fp->cnt;
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pb.ioPosMode = fp->refnum > 0 ? fsFromStart : fsAtMark;
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if ((pb.ioPosOffset = fp->pos - fp->cnt) > fp->len) {
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pb.ioMisc = (Ptr) pb.ioPosOffset;
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if (PBSetEOFSync((ParmBlkPtr)&pb) != noErr)
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break;
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}
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if (!fp->binary)
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replace(fp->ptr, fp->cnt, '\n', '\r');
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PBWriteSync((ParmBlkPtr)&pb);
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if (!pb.ioResult && pb.ioPosOffset > fp->len)
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fp->len = pb.ioPosOffset;
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break;
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/* close */
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case 2:
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pb.ioResult = close(fp);
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break;
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}
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/* done */
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if (pb.ioResult) {
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if (i < 2) {
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fp->pos -= fp->cnt;
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fp->cnt = 0;
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}
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fp->err = 1;
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errno = pb.ioResult;
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return(EOF);
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}
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return(0);
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}
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static int
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close(FILE *fp)
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{
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HFileParam pb;
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Str255 buf;
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register char *fcb = FCBSPtr + fp->refnum;
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VCB *vcb = fcbVPtr(fcb);
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register char *s;
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enum { none, MFS, HFS } del = none;
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pb.ioVRefNum = vcb->vcbVRefNum;
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if (fp->remove) {
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pb.ioNamePtr = buf;
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pb.ioFVersNum = 0;
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/* close temporary file - HFS */
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if (vcb->vcbSigWord == 0x4244) {
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pb.ioDirID = fcbDirID(fcb);
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s = fcbCName(fcb);
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memcpy(buf, s, Length(s) + 1);
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del = HFS;
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}
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/* close temporary file - MFS */
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else if (vcb->vcbSigWord == 0xD2D7) {
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for (pb.ioFDirIndex = 1; PBGetFInfoSync((ParmBlkPtr)&pb) == noErr; pb.ioFDirIndex++) {
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if (pb.ioFRefNum == fp->refnum) {
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del = MFS;
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break;
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}
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}
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}
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}
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/* close file and flush volume buffer */
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pb.ioFRefNum = fp->refnum;
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if (PBCloseSync((ParmBlkPtr)&pb) == noErr) {
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if (del == MFS)
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PBDeleteSync((ParmBlkPtr)&pb);
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else if (del == HFS)
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PBHDeleteSync((HParmBlkPtr)&pb);
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pb.ioNamePtr = 0;
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PBFlushVolSync((ParmBlkPtr)&pb);
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}
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return(pb.ioResult);
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}
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/*
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* replace - routine for doing CR/LF conversion
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*
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*/
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static void
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replace(register unsigned char *s, register size_t n, register int c1, register int c2)
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{
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#pragma options(honor_register)
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register unsigned char *t;
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for (; n && (t = memchr(s, c1, n)); s = t) {
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*t++ = c2;
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n -= t - s;
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}
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}
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