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Annotation of 3BSD/new/libI77uc/sue.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * sequential unformatted external read/write routines
        !             3:  */
        !             4: 
        !             5: #include "fio.h"
        !             6: 
        !             7: extern int reclen;
        !             8: long recloc;
        !             9: char *rsue = "read sue";
        !            10: char *sue = "sue";
        !            11: 
        !            12: s_rsue(a) cilist *a;
        !            13: {
        !            14:        int n;
        !            15:        reading = YES;
        !            16:        if(n=c_sue(a,READ)) return(n);
        !            17:        if(curunit->uwrt) nowreading(curunit);
        !            18:        recpos = 0;
        !            19:        if(fread(&reclen,sizeof(int),1,cf) == 1) return(OK);
        !            20:        if(feof(cf))
        !            21:        {       curunit->uend = YES;
        !            22:                err(endflag, EOF, rsue)
        !            23:        }
        !            24:        clearerr(cf);
        !            25:        err(errflag, errno, rsue)
        !            26: }
        !            27: 
        !            28: s_wsue(a) cilist *a;
        !            29: {
        !            30:        int n;
        !            31:        reading = NO;
        !            32:        if(n=c_sue(a,WRITE)) return(n);
        !            33:        if(!curunit->uwrt) nowwriting(curunit);
        !            34:        reclen = 0;
        !            35:        recloc=ftell(cf);
        !            36:        fseek(cf,(long)sizeof(int),1);
        !            37:        curunit->uend = NO;
        !            38:        return(OK);
        !            39: }
        !            40: 
        !            41: c_sue(a,flag) cilist *a;
        !            42: {      int n;
        !            43:        external = sequential = YES;
        !            44:        formatted = NO;
        !            45:        lfname = NULL;
        !            46:        elist = NO;
        !            47:        errflag = a->cierr;
        !            48:        endflag = a->ciend;
        !            49:        lunit = a->ciunit;
        !            50:        if(not_legal(lunit)) err(errflag,101,sue)
        !            51:        curunit = &units[lunit];
        !            52:        if(!curunit->ufd && (n=fk_open(flag,SEQ,UNF,lunit))) err(errflag,n,sue);
        !            53:        cf = curunit->ufd;
        !            54:        elist = YES;
        !            55:        lfname = curunit->ufnm;
        !            56:        if(curunit->ufmt) err(errflag,103,sue)
        !            57:        if(curunit->url) err(errflag,105,sue)
        !            58:        if(!curunit->useek) err(errflag,120,sue)
        !            59:        return(OK);
        !            60: }
        !            61: 
        !            62: e_wsue()
        !            63: {      long loc;
        !            64:        fwrite(&reclen,sizeof(int),1,cf);
        !            65:        loc=ftell(cf);
        !            66:        fseek(cf,recloc,0);
        !            67:        fwrite(&reclen,sizeof(int),1,cf);
        !            68:        fseek(cf,loc,0);
        !            69:        return(OK);
        !            70: }
        !            71: 
        !            72: e_rsue()
        !            73: {
        !            74:        fseek(cf,(long)(reclen-recpos+sizeof(int)),1);
        !            75:        return(OK);
        !            76: }

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