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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.
- */
-
- #include <stdio.h>
- #include "estruct.h"
- #include "edef.h"
-
- FILE *ffp; /* File pointer, all functions. */
- int eofflag; /* end-of-file flag */
-
- /*
- * Open a file for reading.
- */
- ffropen(fn)
- char *fn;
- {
- if ((ffp=fopen(fn, "r")) == NULL)
- return (FIOFNF);
- eofflag = FALSE;
- 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()
- {
- /* free this since we do not need it anymore */
- if (fline) {
- free(fline);
- fline = NULL;
- }
-
- #if MSDOS & CTRLZ
- fputc(26, ffp); /* add a ^Z at the end of the file */
- #endif
-
- #if V7 | USG | BSD | (MSDOS & (LATTICE | MSC | TURBO))
- 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()
-
- {
- register int c; /* current character read */
- register int i; /* current index into fline */
- register char *tmpline; /* temp storage for expanding line */
-
- /* if we are at the end...return it */
- if (eofflag)
- return(FIOEOF);
-
- /* dump fline if it ended up too big */
- if (flen > NSTRING) {
- free(fline);
- fline = NULL;
- }
-
- /* if we don't have an fline, allocate one */
- if (fline == NULL)
- if ((fline = malloc(flen = NSTRING)) == NULL)
- return(FIOMEM);
-
- /* read the line in */
- i = 0;
- while ((c = fgetc(ffp)) != EOF && c != '\n') {
- fline[i++] = c;
- /* if it's longer, get more room */
- if (i >= flen) {
- if ((tmpline = malloc(flen+NSTRING)) == NULL)
- return(FIOMEM);
- strncpy(tmpline, fline, flen);
- flen += NSTRING;
- free(fline);
- fline = tmpline;
- }
- }
-
- #if ST520
- if(fline[i-1] == '\r')
- i--;
- #endif
-
- /* test for any errors that may have occured */
- if (c == EOF) {
- if (ferror(ffp)) {
- mlwrite("File read error");
- return(FIOERR);
- }
-
- if (i != 0)
- eofflag = TRUE;
- else
- return(FIOEOF);
- }
-
- /* terminate and decrypt the string */
- fline[i] = 0;
- #if CRYPT
- if (cryptflag)
- crypt(fline, strlen(fline));
- #endif
- return(FIOSUC);
- }
-
- #if AZTEC & MSDOS
- #undef fgetc
- /* a1getc: Get an ascii char from the file input stream
- but DO NOT strip the high bit
- */
-
- int a1getc(fp)
-
- FILE *fp;
-
- {
- int c; /* translated character */
-
- c = getc(fp); /* get the character */
-
- /* if its a <LF> char, throw it out */
- while (c == 10)
- c = getc(fp);
-
- /* if its a <RETURN> char, change it to a LF */
- if (c == '\r')
- c = '\n';
-
- /* if its a ^Z, its an EOF */
- if (c == 26)
- c = EOF;
-
- return(c);
- }
- #endif
-