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Annotation of 43BSD/contrib/notes/src/pagein.c, revision 1.1

1.1     ! root        1: #include "parms.h"
        !             2: #include "structs.h"
        !             3: 
        !             4: #ifdef RCSIDENT
        !             5: static char rcsid[] = "$Header: pagein.c,v 1.7 85/01/18 15:33:36 notes Rel $";
        !             6: #endif RCSIDENT
        !             7: 
        !             8: /*
        !             9:  *     pagein(zfile, where)
        !            10:  *     FILE *zfile; struct daddr_f *where;
        !            11:  *
        !            12:  *     reads in a single 'page' as defined by the notesfile system and
        !            13:  *     returns the count of characters moved.
        !            14:  *
        !            15:  *     Original Coding:        Ray Essick      Long agao
        !            16:  *             moved out of gtext.c and mult.c and others   4/5/82
        !            17:  *     Converted for infinite size notes       RBE 5/8/82
        !            18:  *
        !            19:  */
        !            20: 
        !            21: long    pagein (io, zfile, where)
        !            22: struct io_f *io;
        !            23: FILE * zfile;
        !            24: struct daddr_f *where;
        !            25: {
        !            26: 
        !            27:     register int    c;
        !            28:     register int    i;
        !            29:     register long   nchars;
        !            30:     register long   ignored;                           /* number ignored */
        !            31:     register int    ignoring;                          /* whether ignoring */
        !            32:     struct daddr_f  nwhere;
        !            33:     struct txtbuf_f buf;                               /* hold text */
        !            34: 
        !            35:     locknf (io, TXTLOCK);                              /* CRITICAL */
        !            36:     x (lseek (io -> fidtxt, 0L, 0) < 0, "pagein: bad seek 0");
        !            37:     x (read (io -> fidtxt, where, sizeof *where) < 0, "pagein: read 0");
        !            38:     x (lseek (io -> fidtxt, where -> addr, 0) < 0,
        !            39:            "pagein: bad seek 1");
        !            40: 
        !            41:     where -> textlen = 0;                              /* no text yet */
        !            42:     nchars = 0;
        !            43:     i = 0;
        !            44:     ignoring = 0;                                      /* save em for now */
        !            45:     ignored = 0;
        !            46:     while ((c = getc (zfile)) != EOF)                  /* grab input */
        !            47:     {
        !            48:        if (!ignoring)
        !            49:        {
        !            50:            if (i == BUFSIZE)                           /* flush full buffer */
        !            51:            {
        !            52:                x (write (io -> fidtxt, buf.txtbuf, BUFSIZE) != BUFSIZE, "pagein: bad text");
        !            53:                i = 0;                                  /* reset buffer */
        !            54:            }
        !            55:            buf.txtbuf[i++] = c;
        !            56:            if (++nchars >= io -> descr.d_longnote)     /* count characters */
        !            57:            {
        !            58:                ignoring++;                             /* don't add any more */
        !            59:            }
        !            60:        }
        !            61:        else                                            /* ignoring */
        !            62:        {
        !            63:            ignored++;
        !            64:        }
        !            65:     }
        !            66:     if (i != 0)                                                /* if we've got some */
        !            67:        x (write (io -> fidtxt, buf.txtbuf, i) != i, "pagein: bad text");
        !            68:     if (ignored)                                       /* write warning */
        !            69:     {
        !            70:        sprintf (buf.txtbuf, "\n\n%s ignored %ld excess bytes\n",
        !            71:                System, ignored);
        !            72:        i = strlen (buf.txtbuf);                        /* get length */
        !            73:        x (write (io -> fidtxt, buf.txtbuf, i) != i, "pagein: bad text");
        !            74:        nchars += i;                                    /* count extras */
        !            75:     }
        !            76: /*
        !            77:  *     fix count in the header
        !            78:  */
        !            79:     where -> textlen = nchars;                         /* fill header */
        !            80: /*
        !            81:  *     fix free pointer
        !            82:  */
        !            83:     x (lseek (io -> fidtxt, 0l, 0) < 0, "pagein:bad reseek");
        !            84:     nwhere.addr = where -> addr + nchars;
        !            85:     if (nwhere.addr & 1)                               /* odd?? */
        !            86:        nwhere.addr++;                                  /* round to word boundary */
        !            87:     x (write (io -> fidtxt, &nwhere, sizeof nwhere) != sizeof nwhere, "pagein: badupdate");
        !            88: 
        !            89:     unlocknf (io, TXTLOCK);
        !            90:     return ((long) nchars);
        !            91: }

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