projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 202e9631 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 |
| 38dd0e83 | 8 | _sccsid:.asciz "@(#)puts.s 5.4 (Berkeley) %G%" |
| 2ce81398 | 9 | #endif LIBC_SCCS |
| 202e9631 KM |
10 | |
| 11 | /* | |
| 12 | * puts(s); | |
| 13 | * char *s; | |
| 14 | * | |
| 15 | * argument: a source string. | |
| 16 | * side effects: writes to the standard output using the data in | |
| 17 | * the null-terminated source string; a newline is appended. | |
| 18 | * result: technically void; for compatibility we return 0 for the null | |
| 19 | * string, non-zero otherwise. We return zero for errors too. | |
| 20 | */ | |
| 21 | ||
| 22 | #include "DEFS.h" | |
| 23 | ||
| 24 | #define NBF 04 | |
| 25 | #define LBF 0200 | |
| 26 | ||
| 27 | #define NL 012 | |
| 28 | ||
| 29 | ENTRY(puts, R11|R10|R9) | |
| 30 | ||
| 31 | #define S r11 | |
| 32 | movl 4(ap),S | |
| 33 | #define IOP r10 | |
| 34 | #define _CNT | |
| 35 | #define _PTR 4 | |
| 36 | #define _BASE 8 | |
| 37 | #define _BUFSIZ 12 | |
| 38 | #define _FLAG 16 | |
| 39 | movab __iob+20,IOP | |
| 40 | ||
| 41 | #define UNBUF -4(fp) | |
| 42 | ||
| 43 | #define COUNT r9 | |
| 44 | ||
| 45 | /* | |
| 46 | * For unbuffered I/O, line buffer the output line. | |
| 47 | * Ugly but fast -- and doesn't CURRENTLY break anything (sigh). | |
| 48 | */ | |
| 49 | movab -1028(sp),sp | |
| 50 | bicw3 $~NBF,_FLAG(IOP),UNBUF | |
| 51 | jeql 1f | |
| 52 | ||
| 53 | bicw2 $NBF,_FLAG(IOP) /* Clear no-buffering flag */ | |
| 54 | movl sp,_BASE(IOP) /* Create a buffer */ | |
| 55 | movl sp,_PTR(IOP) | |
| 56 | cvtwl $1024,_BUFSIZ(IOP) | |
| 57 | jbr 2f | |
| 58 | ||
| 59 | 1: | |
| 3a8b31bb DS |
60 | tstl _CNT(IOP) /* Has a buffer been allocated? */ |
| 61 | jgtr 2f | |
| 202e9631 KM |
62 | pushl IOP /* Get _flsbuf() to make one */ |
| 63 | pushl $0 | |
| 64 | calls $2,__flsbuf | |
| 65 | tstl r0 | |
| 66 | jlss Lerror | |
| 67 | incl _CNT(IOP) /* Unput the char we sent */ | |
| 68 | decl _PTR(IOP) | |
| 69 | 2: | |
| 70 | ||
| 71 | /* | |
| 72 | * Search for the terminating null. | |
| 73 | */ | |
| 74 | Lloop: | |
| 75 | addl3 _BASE(IOP),_BUFSIZ(IOP),COUNT /* How many bytes? */ | |
| 76 | subl2 _PTR(IOP),COUNT | |
| 77 | locc $0,COUNT,(S) /* Look for a null */ | |
| 78 | jeql Lagain | |
| 79 | ||
| 80 | subl2 r0,COUNT /* Copy the data */ | |
| 81 | movc3 COUNT,(S),*_PTR(IOP) | |
| 82 | movl r3,_PTR(IOP) /* Fix up IOP */ | |
| 83 | subl2 COUNT,_CNT(IOP) | |
| 84 | ||
| 85 | Lnl: | |
| 86 | movb $NL,*_PTR(IOP) /* Append a newline */ | |
| 87 | incl _PTR(IOP) | |
| 88 | decl _CNT(IOP) | |
| 89 | ||
| 90 | bitw $LBF,_FLAG(IOP) /* If line buffered... */ | |
| 91 | jneq 1f | |
| 38dd0e83 JB |
92 | tstw UNBUF /* or unbuffered... */ |
| 93 | jneq 1f | |
| 202e9631 KM |
94 | tstl _CNT(IOP) /* or a full buffer... */ |
| 95 | jgtr 2f | |
| 96 | 1: | |
| 97 | pushl IOP /* ... flush the buffer */ | |
| 98 | calls $1,_fflush | |
| 99 | tstl r0 | |
| 100 | jlss Lerror | |
| 101 | 2: | |
| 102 | ||
| 103 | /* | |
| 104 | * Fix up buffering again. | |
| 105 | */ | |
| 106 | tstw UNBUF | |
| 107 | jeql 1f | |
| 108 | bisw2 $NBF,_FLAG(IOP) /* Reset flag */ | |
| 109 | clrl _BASE(IOP) /* Clear data structure */ | |
| 110 | clrl _BUFSIZ(IOP) | |
| 111 | clrl _CNT(IOP) | |
| 112 | 1: | |
| 113 | cvtbl $NL,r0 /* Compatibility hack */ | |
| 114 | ret | |
| 115 | ||
| 116 | /* | |
| 117 | * We didn't find the null -- loop. | |
| 118 | */ | |
| 119 | Lagain: | |
| 120 | movc3 COUNT,(S),*_PTR(IOP) /* Copy the data */ | |
| 121 | movl r1,S | |
| 122 | movl r3,_PTR(IOP) /* Fix up IOP */ | |
| 123 | subl2 COUNT,_CNT(IOP) | |
| 124 | pushl IOP /* The buffer is full -- flush it */ | |
| 125 | calls $1,_fflush | |
| 126 | tstl r0 | |
| 127 | jlss Lerror | |
| 128 | tstb (S) /* More data? */ | |
| 129 | jneq Lloop | |
| 130 | jbr Lnl | |
| 131 | ||
| 132 | /* | |
| 133 | * Bomb out. Return 0 (why not? that's what the old one did). | |
| 134 | */ | |
| 135 | Lerror: | |
| 136 | clrl r0 | |
| 137 | ret |