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- /*
- * 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 "estruct.h"
- #include "edef.h"
-
- #if MEGAMAX
- overlay "fileio"
- #endif
-
- 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 MSDOS & CTRLZ
- fputc(26, ffp); /* add a ^Z at the end of the file */
- #endif
-
- #if V7 | USG | BSD | (MSDOS & (LATTICE | MSC))
- if (fclose(ffp) != FALSE) {
- mlwrite("Error closing file");
- return(FIOERR);
- }
- return(FIOSUC);
- #else
- fclose(ffp);
- return (FIOSUC);
- #endif
- }
-
- /*
- * 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)
- char buf[];
- {
- register int i;
- #if CRYPT
- char c; /* character to translate */
-
- if (cryptflag) {
- for (i = 0; i < nbuf; ++i) {
- c = buf[i] & 0xff;
- crypt(&c, 1);
- fputc(c, ffp);
- }
- } else
- for (i = 0; i < nbuf; ++i)
- fputc(buf[i]&0xFF, ffp);
- #else
- for (i = 0; i < nbuf; ++i)
- fputc(buf[i]&0xFF, ffp);
- #endif
-
- #if ST520
- fputc('\r', ffp);
- #endif
- fputc('\n', ffp);
-
- if (ferror(ffp)) {
- 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 = fgetc(ffp)) != EOF && c != '\n') {
- if (i >= nbuf-2) {
- buf[nbuf - 2] = c; /* store last char read */
- buf[nbuf - 1] = 0; /* and terminate it */
- mlwrite("File has long line");
- #if CRYPT
- if (cryptflag)
- crypt(buf, strlen(buf));
- #endif
- return (FIOLNG);
- }
- buf[i++] = c;
- }
-
- #if ST520
- if(buf[i-1] == '\r')
- i--;
- #endif
- if (c == EOF) {
- if (ferror(ffp)) {
- mlwrite("File read error");
- return (FIOERR);
- }
-
- if (i != 0) {
- buf[i] = 0;
- return(FIOFUN);
- }
-
- return (FIOEOF);
- }
-
- buf[i] = 0;
- #if CRYPT
- if (cryptflag)
- crypt(buf, strlen(buf));
- #endif
- return (FIOSUC);
- }