132 lines
2.4 KiB
C++
132 lines
2.4 KiB
C++
|
/*
|
||
|
|
* The routines in this file
|
||
|
|
* read and write ASCII files from the
|
||
|
|
* disk. All of the knowledge about files
|
||
|
|
* are here. A better message writing
|
||
|
|
* scheme should be used.
|
||
|
|
*/
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "ed.h"
|
||
|
|
|
||
|
|
FILE *ffp; /* File pointer, all functions. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Open a file for reading.
|
||
|
|
*/
|
||
|
|
ffropen(fn)
|
||
|
|
char *fn;
|
||
|
|
{
|
||
|
|
if ((ffp=fopen(fn, "r")) == NULL)
|
||
|
|
return (FIOFNF);
|
||
|
|
return (FIOSUC);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Open a file for writing.
|
||
|
|
* Return TRUE if all is well, and
|
||
|
|
* FALSE on error (cannot create).
|
||
|
|
*/
|
||
|
|
ffwopen(fn)
|
||
|
|
char *fn;
|
||
|
|
{
|
||
|
|
#if VMS
|
||
|
|
register int fd;
|
||
|
|
|
||
|
|
if ((fd=creat(fn, 0666, "rfm=var", "rat=cr")) < 0
|
||
|
|
|| (ffp=fdopen(fd, "w")) == NULL) {
|
||
|
|
#else
|
||
|
|
if ((ffp=fopen(fn, "w")) == NULL) {
|
||
|
|
#endif
|
||
|
|
mlwrite("Cannot open file for writing");
|
||
|
|
return (FIOERR);
|
||
|
|
}
|
||
|
|
return (FIOSUC);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Close a file.
|
||
|
|
* Should look at the status in all systems.
|
||
|
|
*/
|
||
|
|
ffclose()
|
||
|
|
{
|
||
|
|
#if V7
|
||
|
|
if (fclose(ffp) != FALSE) {
|
||
|
|
mlwrite("Error closing file");
|
||
|
|
return(FIOERR);
|
||
|
|
}
|
||
|
|
return(FIOSUC);
|
||
|
|
#endif
|
||
|
|
fclose(ffp);
|
||
|
|
return (FIOSUC);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Write a line to the already
|
||
|
|
* opened file. The "buf" points to the
|
||
|
|
* buffer, and the "nbuf" is its length, less
|
||
|
|
* the free newline. Return the status.
|
||
|
|
* Check only at the newline.
|
||
|
|
*/
|
||
|
|
ffputline(buf, nbuf)
|
||
|
|
register char buf[];
|
||
|
|
{
|
||
|
|
register int i;
|
||
|
|
|
||
|
|
for (i=0; i<nbuf; ++i)
|
||
|
|
putc(buf[i]&0xFF, ffp);
|
||
|
|
putc('\n', ffp);
|
||
|
|
if (ferror(ffp) != FALSE) {
|
||
|
|
mlwrite("Write I/O error");
|
||
|
|
return (FIOERR);
|
||
|
|
}
|
||
|
|
return (FIOSUC);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read a line from a file,
|
||
|
|
* and store the bytes in the supplied
|
||
|
|
* buffer. The "nbuf" is the length of the
|
||
|
|
* buffer. Complain about long lines and lines
|
||
|
|
* at the end of the file that don't have a
|
||
|
|
* newline present. Check for I/O errors
|
||
|
|
* too. Return status.
|
||
|
|
*/
|
||
|
|
ffgetline(buf, nbuf)
|
||
|
|
register char buf[];
|
||
|
|
{
|
||
|
|
register int c;
|
||
|
|
register int i;
|
||
|
|
|
||
|
|
i = 0;
|
||
|
|
while ((c=getc(ffp))!=EOF && c!='\n') {
|
||
|
|
if (i >= nbuf-1) {
|
||
|
|
mlwrite("File has long line");
|
||
|
|
#if GEM
|
||
|
|
buf[i] = 0;
|
||
|
|
ungetc(c, ffp);
|
||
|
|
return (FIOSUC); /* Make long lines load */
|
||
|
|
#endif
|
||
|
|
return (FIOERR);
|
||
|
|
}
|
||
|
|
buf[i++] = c;
|
||
|
|
}
|
||
|
|
if (c == EOF) {
|
||
|
|
if (ferror(ffp) != FALSE) {
|
||
|
|
mlwrite("File read error");
|
||
|
|
return (FIOERR);
|
||
|
|
}
|
||
|
|
if (i != 0) {
|
||
|
|
mlwrite("File has funny line at EOF");
|
||
|
|
#if GEM
|
||
|
|
buf[i]=0; /* Make funny line show up. */
|
||
|
|
return (FIOSUC);
|
||
|
|
#else
|
||
|
|
return (FIOERR);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
return (FIOEOF);
|
||
|
|
}
|
||
|
|
buf[i] = 0;
|
||
|
|
return (FIOSUC);
|
||
|
|
}
|