// ----------------------------------------------------------------------------
size_t fread( void * restrict ptr, size_t size, size_t nelem, FILE * restrict stream ) { /* TODO */ };
+
+/* PDPC code - unreviewed, verbatim.
+Read the note in fopen.c.
+{
+ size_t toread;
+ size_t elemRead;
+ size_t actualRead;
+#ifdef __OS2__
+ APIRET rc;
+ ULONG tempRead;
+#endif
+#ifdef __MSDOS__
+ int errind;
+ size_t tempRead;
+#endif
+
+ if (nmemb == 1)
+ {
+ toread = size;
+ }
+ else if (size == 1)
+ {
+ toread = nmemb;
+ }
+ else
+ {
+ toread = size * nmemb;
+ }
+ if (toread < stream->szfbuf)
+ {
+ stream->quickBin = 0;
+ }
+ if (!stream->quickBin)
+ {
+ if (stream->textMode)
+ {
+ freadSlowT(ptr, stream, toread, &actualRead);
+ }
+ else
+ {
+ if (toread <= (stream->endbuf - stream->upto))
+ {
+ memcpy(ptr, stream->upto, toread);
+ actualRead = toread;
+ stream->upto += toread;
+ }
+ else
+ {
+ freadSlowB(ptr, stream, toread, &actualRead);
+ }
+ }
+ if (nmemb == 1)
+ {
+ if (actualRead == size)
+ {
+ elemRead = 1;
+ }
+ else
+ {
+ elemRead = 0;
+ }
+ }
+ else if (size == 1)
+ {
+ elemRead = actualRead;
+ }
+ else
+ {
+ elemRead = actualRead / size;
+ }
+ return (elemRead);
+ }
+ else
+ {
+#ifdef __OS2__
+ rc = DosRead(stream->hfile, ptr, toread, &tempRead);
+ if (rc != 0)
+ {
+ actualRead = 0;
+ stream->errorInd = 1;
+ errno = rc;
+ }
+ else
+ {
+ actualRead = tempRead;
+ }
+#endif
+#ifdef __MSDOS__
+ tempRead = __read(stream->hfile, ptr, toread, &errind);
+ if (errind)
+ {
+ errno = tempRead;
+ actualRead = 0;
+ stream->errorInd = 1;
+ }
+ else
+ {
+ actualRead = tempRead;
+ }
+#endif
+ if (nmemb == 1)
+ {
+ if (actualRead == size)
+ {
+ elemRead = 1;
+ }
+ else
+ {
+ elemRead = 0;
+ stream->eofInd = 1;
+ }
+ }
+ else if (size == 1)
+ {
+ elemRead = actualRead;
+ if (nmemb != actualRead)
+ {
+ stream->eofInd = 1;
+ }
+ }
+ else
+ {
+ elemRead = actualRead / size;
+ if (toread != actualRead)
+ {
+ stream->eofInd = 1;
+ }
+ }
+ stream->bufStartR += actualRead;
+ return (elemRead);
+ }
+}
+
+
+/*
+while toread has not been satisfied
+{
+ scan stuff out of buffer, replenishing buffer as required
+}
+*/
+
+static void freadSlowT(void *ptr,
+ FILE *stream,
+ size_t toread,
+ size_t *actualRead)
+{
+ int finReading = 0;
+ size_t avail;
+ size_t need;
+ char *p;
+ size_t got;
+#ifdef __OS2__
+ ULONG tempRead;
+ APIRET rc;
+#endif
+#ifdef __MSDOS__
+ size_t tempRead;
+ int errind;
+#endif
+
+ *actualRead = 0;
+ while (!finReading)
+ {
+ if (stream->upto == stream->endbuf)
+ {
+ stream->bufStartR += (stream->upto - stream->fbuf);
+#ifdef __OS2__
+ rc = DosRead(stream->hfile,
+ stream->fbuf,
+ stream->szfbuf,
+ &tempRead);
+ if (rc != 0)
+ {
+ tempRead = 0;
+ stream->errorInd = 1;
+ errno = rc;
+ }
+#endif
+#ifdef __MSDOS__
+ tempRead = __read(stream->hfile,
+ stream->fbuf,
+ stream->szfbuf,
+ &errind);
+ if (errind)
+ {
+ errno = tempRead;
+ tempRead = 0;
+ stream->errorInd = 1;
+ }
+#endif
+ if (tempRead == 0)
+ {
+ stream->eofInd = 1;
+ break;
+ }
+ stream->endbuf = stream->fbuf + tempRead;
+ *stream->endbuf = '\n';
+ stream->upto = stream->fbuf;
+ }
+ avail = (size_t)(stream->endbuf - stream->upto) + 1;
+ need = toread - *actualRead;
+ p = memchr(stream->upto, '\n', avail);
+ got = (size_t)(p - stream->upto);
+ if (need < got)
+ {
+ memcpy((char *)ptr + *actualRead, stream->upto, need);
+ stream->upto += need;
+ *actualRead += need;
+ }
+ else
+ {
+ memcpy((char *)ptr + *actualRead, stream->upto, got);
+ stream->upto += got;
+ *actualRead += got;
+ if (p != stream->endbuf)
+ {
+ if (*(stream->upto - 1) == '\r')
+ {
+ *((char *)ptr + *actualRead - 1) = '\n';
+ }
+ else
+ {
+ *((char *)ptr + *actualRead) = '\n';
+ *actualRead += 1;
+ }
+ stream->upto++;
+ }
+ else
+ {
+ if (*(stream->upto - 1) == '\r')
+ {
+ *actualRead -= 1;
+ }
+ }
+ }
+ if (*actualRead == toread)
+ {
+ finReading = 1;
+ }
+ }
+ return;
+}
+
+static void freadSlowB(void *ptr,
+ FILE *stream,
+ size_t toread,
+ size_t *actualRead)
+{
+ size_t avail;
+#ifdef __OS2__
+ ULONG tempRead;
+ APIRET rc;
+#endif
+#ifdef __MSDOS__
+ size_t tempRead;
+ int errind;
+#endif
+
+ avail = (size_t)(stream->endbuf - stream->upto);
+ memcpy(ptr, stream->upto, avail);
+ *actualRead = avail;
+ stream->bufStartR += (stream->endbuf - stream->fbuf);
+ if (toread >= stream->szfbuf)
+ {
+ stream->upto = stream->endbuf;
+ stream->quickBin = 1;
+#ifdef __OS2__
+ rc = DosRead(stream->hfile,
+ (char *)ptr + *actualRead,
+ toread - *actualRead,
+ &tempRead);
+ if (rc != 0)
+ {
+ tempRead = 0;
+ stream->errorInd = 1;
+ errno = rc;
+ }
+#endif
+#ifdef __MSDOS__
+ tempRead = __read(stream->hfile,
+ (char *)ptr + *actualRead,
+ toread - *actualRead,
+ &errind);
+ if (errind)
+ {
+ errno = tempRead;
+ tempRead = 0;
+ stream->errorInd = 1;
+ }
+#endif
+ else if (tempRead != (toread - *actualRead))
+ {
+ stream->eofInd = 1;
+ }
+ *actualRead += tempRead;
+ stream->bufStartR += tempRead;
+ }
+ else
+ {
+ size_t left;
+
+ stream->upto = stream->fbuf;
+#ifdef __OS2__
+ rc = DosRead(stream->hfile,
+ stream->fbuf,
+ stream->szfbuf,
+ &tempRead);
+ left = toread - *actualRead;
+ if (rc != 0)
+ {
+ tempRead = 0;
+ stream->errorInd = 1;
+ errno = rc;
+ }
+#endif
+#ifdef __MSDOS__
+ tempRead = __read(stream->hfile,
+ stream->fbuf,
+ stream->szfbuf,
+ &errind);
+ left = toread - *actualRead;
+ if (errind)
+ {
+ errno = tempRead;
+ tempRead = 0;
+ stream->errorInd = 1;
+ }
+#endif
+ else if (tempRead < left)
+ {
+ stream->eofInd = 1;
+ }
+ stream->endbuf = stream->fbuf + tempRead;
+ *stream->endbuf = '\n';
+ avail = (size_t)(stream->endbuf - stream->upto);
+ if (avail > left)
+ {
+ avail = left;
+ }
+ memcpy((char *)ptr + *actualRead,
+ stream->upto,
+ avail);
+ stream->upto += avail;
+ *actualRead += avail;
+ }
+ return;
+}
+#endif
+*/
projects / pdclib / blobdiff