projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 1d55a1e7 | 1 | /* |
| 1f3f92e0 | 2 | char id_dfe[] = "@(#)dfe.c 1.3"; |
| 1d55a1e7 DW |
3 | * |
| 4 | * direct formatted external i/o | |
| 5 | */ | |
| 6 | ||
| 7 | #include "fio.h" | |
| 8 | ||
| 9 | extern int rd_ed(),rd_ned(),w_ed(),w_ned(); | |
| 10 | int y_getc(),y_putc(),y_rnew(),y_wnew(),y_tab(); | |
| 11 | ||
| 1f3f92e0 DW |
12 | char rdfe[] = "read dfe"; |
| 13 | char wdfe[] = "write dfe"; | |
| 1d55a1e7 DW |
14 | |
| 15 | s_rdfe(a) cilist *a; | |
| 16 | { | |
| 17 | int n; | |
| 18 | reading = YES; | |
| 19 | if(n=c_dfe(a,READ)) return(n); | |
| 1f3f92e0 | 20 | if(curunit->uwrt && ! nowreading(curunit)) err(errflag, errno, rdfe) |
| 1d55a1e7 DW |
21 | getn = y_getc; |
| 22 | doed = rd_ed; | |
| 23 | doned = rd_ned; | |
| 24 | dotab = y_tab; | |
| 25 | dorevert = doend = donewrec = y_rnew; | |
| 14c902c5 | 26 | if(pars_f(fmtbuf)) err(errflag,F_ERFMT,rdfe) |
| 1d55a1e7 DW |
27 | fmt_bg(); |
| 28 | return(OK); | |
| 29 | } | |
| 30 | ||
| 31 | s_wdfe(a) cilist *a; | |
| 32 | { | |
| 33 | int n; | |
| 34 | reading = NO; | |
| 35 | if(n=c_dfe(a,WRITE)) return(n); | |
| 36 | curunit->uend = NO; | |
| 1f3f92e0 | 37 | if(!curunit->uwrt && ! nowwriting(curunit)) err(errflag, errno, wdfe) |
| 1d55a1e7 DW |
38 | putn = y_putc; |
| 39 | doed = w_ed; | |
| 40 | doned = w_ned; | |
| 41 | dotab = y_tab; | |
| 42 | dorevert = doend = donewrec = y_wnew; | |
| 14c902c5 | 43 | if(pars_f(fmtbuf)) err(errflag,F_ERFMT,wdfe) |
| 1d55a1e7 DW |
44 | fmt_bg(); |
| 45 | return(OK); | |
| 46 | } | |
| 47 | ||
| 48 | e_rdfe() | |
| 49 | { | |
| 50 | en_fio(); | |
| 51 | return(OK); | |
| 52 | } | |
| 53 | ||
| 54 | e_wdfe() | |
| 55 | { | |
| 56 | en_fio(); | |
| 57 | return(OK); | |
| 58 | } | |
| 59 | ||
| 60 | c_dfe(a,flag) cilist *a; | |
| 61 | { int n; | |
| 62 | sequential = NO; | |
| 63 | external = formatted = FORMATTED; | |
| 64 | lfname = NULL; | |
| 65 | elist = NO; | |
| 66 | cursor=scale=recpos=reclen=0; | |
| 67 | radix = 10; | |
| 68 | signit = YES; | |
| 69 | fmtbuf = a->cifmt; | |
| 70 | errflag = a->cierr; | |
| 71 | endflag = a->ciend; | |
| 72 | lunit = a->ciunit; | |
| 1f3f92e0 | 73 | if(not_legal(lunit)) err(errflag,F_ERUNIT,rdfe+5); |
| 1d55a1e7 DW |
74 | curunit = &units[lunit]; |
| 75 | if(!curunit->ufd && (n=fk_open(flag,DIR,FMT,(ftnint)lunit))) | |
| 1f3f92e0 | 76 | err(errflag,n,rdfe+5) |
| 1d55a1e7 DW |
77 | cf = curunit->ufd; |
| 78 | elist = YES; | |
| 79 | lfname = curunit->ufnm; | |
| 1f3f92e0 DW |
80 | if(!curunit->ufmt) err(errflag,F_ERNOFIO,rdfe+5) |
| 81 | if(!curunit->useek || !curunit->url) err(errflag,F_ERNODIO,rdfe+5) | |
| 1d55a1e7 DW |
82 | recnum = a->cirec - 1; |
| 83 | fseek(cf, (long)curunit->url * recnum, 0); | |
| 84 | cblank = curunit->ublnk; | |
| 85 | cplus = NO; | |
| 86 | return(OK); | |
| 87 | } | |
| 88 | ||
| 89 | y_getc() | |
| 90 | { | |
| 91 | int ch; | |
| 92 | if(curunit->uend) return(EOF); | |
| 93 | if(curunit->url==1 || recpos++ < curunit->url) | |
| 94 | { | |
| 95 | if((ch=getc(cf))!=EOF) | |
| 96 | { | |
| 97 | return(ch); | |
| 98 | } | |
| 99 | if(feof(cf)) | |
| 100 | { | |
| 101 | curunit->uend = YES; | |
| 102 | return(EOF); | |
| 103 | } | |
| 104 | err(errflag,errno,rdfe); | |
| 105 | } | |
| 106 | else return(' '); | |
| 107 | } | |
| 108 | ||
| 109 | y_putc(c) | |
| 110 | { | |
| 14c902c5 | 111 | if(curunit->url!=1 && recpos++ >= curunit->url) err(errflag,F_EREREC,wdfe) |
| 1d55a1e7 DW |
112 | putc(c,cf); |
| 113 | return(OK); | |
| 114 | } | |
| 115 | ||
| 116 | y_tab() | |
| 117 | { int n; | |
| 118 | if(curunit->url==1) | |
| 119 | { | |
| 14c902c5 | 120 | if(cursor < 0 && -cursor > ftell(cf)) return(F_ERBREC); |
| 1d55a1e7 DW |
121 | } |
| 122 | else | |
| 123 | { if(reclen < recpos) reclen = recpos; | |
| 14c902c5 | 124 | if((recpos + cursor) < 0) return(F_ERBREC); |
| 1d55a1e7 DW |
125 | n = reclen - recpos; /* n >= 0 */ |
| 126 | if(!reading && (cursor-n) > 0) | |
| 127 | { recpos = reclen; | |
| 128 | cursor -= n; | |
| 129 | fseek(cf,(long)n,1); | |
| 130 | while(cursor--) if(n=(*putn)(' ')) return(n); | |
| 131 | return(cursor=0); | |
| 132 | } | |
| 133 | recpos += cursor; | |
| 1f3f92e0 | 134 | if(recpos >= curunit->url) err(errflag,F_EREREC,rdfe+5) |
| 1d55a1e7 DW |
135 | } |
| 136 | fseek(cf,(long)cursor,1); | |
| 137 | return(cursor=0); | |
| 138 | } | |
| 139 | ||
| 140 | /* | |
| 141 | /*y_rev() | |
| 142 | /*{ /*what about work done?*/ | |
| 143 | /* if(curunit->url==1) return(0); | |
| 144 | /* while(recpos<curunit->url) (*putn)(' '); | |
| 145 | /* recpos=0; | |
| 146 | /* return(0); | |
| 147 | /*} | |
| 148 | /* | |
| 149 | /*y_err() | |
| 150 | /*{ | |
| 1f3f92e0 | 151 | /* err(errflag, F_EREREC, rdfe+5); |
| 1d55a1e7 DW |
152 | /*} |
| 153 | */ | |
| 154 | ||
| 155 | y_rnew() | |
| 156 | { if(curunit->url != 1) | |
| 157 | { fseek(cf,(long)curunit->url*(++recnum),0); | |
| 158 | recpos = reclen = cursor = 0; | |
| 159 | } | |
| 160 | return(OK); | |
| 161 | } | |
| 162 | ||
| 163 | y_wnew() | |
| 164 | { if(curunit->url != 1) | |
| 165 | { if(reclen > recpos) | |
| 166 | { fseek(cf,(long)(reclen-recpos),1); | |
| 167 | recpos = reclen; | |
| 168 | } | |
| 169 | while(recpos < curunit->url) (*putn)(' '); | |
| 170 | recnum++; | |
| 171 | recpos = reclen = cursor = 0; | |
| 172 | } | |
| 173 | return(OK); | |
| 174 | } | |
| 175 | ||
| 176 | y_rend() | |
| 177 | { | |
| 178 | return(OK); | |
| 179 | } | |
| 180 | ||
| 181 | y_wend() | |
| 182 | { | |
| 183 | return(y_wnew()); | |
| 184 | } |