projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 67c6d82f KM |
1 | /* |
| 2 | * Copyright (c) 1985 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 2ce81398 | 7 | #ifdef LIBC_SCCS |
| 95f51977 | 8 | _sccsid:.asciz "@(#)fputs.c 5.4 (Berkeley) 4/1/86" |
| 2ce81398 | 9 | #endif LIBC_SCCS |
| 67c6d82f KM |
10 | |
| 11 | /* | |
| 12 | * fputs(s, iop); | |
| 13 | * char *s; | |
| 14 | * FILE *iop; | |
| 15 | * | |
| 16 | * arguments: a source string and a file pointer. | |
| 17 | * side effects: writes to the file indicated by iop using the data in | |
| 18 | * the null-terminated source string. | |
| 19 | * result: technically void; for compatibility we return 0 for the null | |
| 20 | * string, non-zero otherwise. We return zero for errors too. | |
| 21 | */ | |
| 22 | ||
| 23 | #include "DEFS.h" | |
| 24 | ||
| 25 | #define NBF 04 | |
| 26 | #define LBF 0200 | |
| 27 | ||
| 28 | #define NL 012 | |
| 29 | ||
| 30 | ENTRY(fputs, R11|R10|R9) | |
| 31 | ||
| 32 | #define S r11 | |
| 33 | movl 4(ap),S | |
| 34 | #define IOP r10 | |
| 35 | #define _CNT | |
| 36 | #define _PTR 4 | |
| 37 | #define _BASE 8 | |
| 38 | #define _BUFSIZ 12 | |
| 39 | #define _FLAG 16 | |
| 40 | movl 8(ap),IOP | |
| 41 | ||
| 42 | #define UNBUF -4(fp) | |
| 43 | ||
| 44 | #define COUNT r9 | |
| 45 | ||
| 46 | /* | |
| 47 | * For compatibility (sigh). | |
| 48 | */ | |
| 49 | tstb (S) | |
| 50 | jeql Lerror | |
| 51 | ||
| 52 | /* | |
| 53 | * For unbuffered I/O, line buffer the output line. | |
| 54 | * Ugly but fast -- and doesn't CURRENTLY break anything (sigh). | |
| 55 | */ | |
| 56 | movab -1028(sp),sp | |
| 57 | bicw3 $~NBF,_FLAG(IOP),UNBUF | |
| 58 | jeql 1f | |
| 59 | ||
| 60 | bicw2 $NBF,_FLAG(IOP) /* Clear no-buffering flag */ | |
| 61 | movl sp,_BASE(IOP) /* Create a buffer */ | |
| 62 | movl sp,_PTR(IOP) | |
| 63 | cvtwl $1024,_BUFSIZ(IOP) | |
| 64 | jbr 2f | |
| 65 | ||
| 66 | 1: | |
| 3a8b31bb DS |
67 | tstl _CNT(IOP) /* Has a buffer been allocated? */ |
| 68 | jgtr 2f | |
| 67c6d82f KM |
69 | pushl IOP /* Get _flsbuf() to do the work */ |
| 70 | pushl $0 | |
| 71 | calls $2,__flsbuf | |
| 72 | tstl r0 | |
| 73 | jlss Lerror | |
| 74 | incl _CNT(IOP) /* Unput the char we sent */ | |
| 75 | decl _PTR(IOP) | |
| 76 | 2: | |
| 77 | ||
| 78 | /* | |
| 79 | * Search for the terminating null. | |
| 80 | * We only need to look at _BUFSIZ bytes or less on each pass. | |
| 81 | */ | |
| 82 | Lloop: | |
| 83 | addl3 _BASE(IOP),_BUFSIZ(IOP),COUNT /* How many bytes? */ | |
| 84 | subl2 _PTR(IOP),COUNT | |
| 85 | locc $0,COUNT,(S) /* Look for a null */ | |
| 86 | jeql Lagain | |
| 87 | ||
| 88 | subl2 r0,COUNT /* Copy the data */ | |
| 89 | movc3 COUNT,(S),*_PTR(IOP) | |
| 90 | movl r3,_PTR(IOP) /* Fix up IOP */ | |
| 91 | subl2 COUNT,_CNT(IOP) | |
| 92 | bitw $LBF,_FLAG(IOP) /* If line buffered... */ | |
| 93 | jneq 1f | |
| 38dd0e83 JB |
94 | tstw UNBUF /* or unbuffered... */ |
| 95 | jneq 1f | |
| 67c6d82f KM |
96 | tstl _CNT(IOP) /* or a full buffer... */ |
| 97 | jgtr 2f | |
| 98 | 1: | |
| 99 | pushl IOP /* ... flush the buffer */ | |
| 100 | calls $1,_fflush | |
| 101 | tstl r0 | |
| 102 | jlss Lerror | |
| 103 | 2: | |
| 104 | ||
| 105 | /* | |
| 106 | * Fix up buffering again. | |
| 107 | */ | |
| 108 | Lfixup: | |
| 109 | tstw UNBUF | |
| 110 | jeql 1f | |
| 111 | bisw2 $NBF,_FLAG(IOP) /* Reset flag */ | |
| 112 | clrl _BASE(IOP) /* Clear data structure */ | |
| 113 | clrl _BUFSIZ(IOP) | |
| 114 | clrl _CNT(IOP) | |
| 115 | 1: | |
| 116 | cvtbl $NL,r0 /* Compatibility hack */ | |
| 117 | ret | |
| 118 | ||
| 119 | /* | |
| 120 | * We didn't find the null -- loop. | |
| 121 | */ | |
| 122 | Lagain: | |
| 123 | movc3 COUNT,(S),*_PTR(IOP) /* Copy the data */ | |
| 124 | movl r1,S | |
| 125 | movl r3,_PTR(IOP) /* Fix up IOP */ | |
| 126 | subl2 COUNT,_CNT(IOP) | |
| 127 | pushl IOP /* The buffer is full -- flush it */ | |
| 128 | calls $1,_fflush | |
| 129 | tstl r0 | |
| 130 | jlss Lerror | |
| 131 | tstb (S) /* More data? */ | |
| 132 | jneq Lloop | |
| 133 | jbr Lfixup | |
| 134 | ||
| 135 | /* | |
| 136 | * Bomb out. Return 0 (why not? that's what the old one did). | |
| 137 | */ | |
| 138 | Lerror: | |
| 139 | clrl r0 | |
| 140 | ret |