The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | # $NetBSD: nodetypes,v 1.12 2003/08/22 11:22:23 agc Exp $ |
| 2 | # Copyright (c) 1991, 1993 |
| 3 | # The Regents of the University of California. All rights reserved. |
| 4 | # |
| 5 | # This code is derived from software contributed to Berkeley by |
| 6 | # Kenneth Almquist. |
| 7 | # |
| 8 | # Redistribution and use in source and binary forms, with or without |
| 9 | # modification, are permitted provided that the following conditions |
| 10 | # are met: |
| 11 | # 1. Redistributions of source code must retain the above copyright |
| 12 | # notice, this list of conditions and the following disclaimer. |
| 13 | # 2. Redistributions in binary form must reproduce the above copyright |
| 14 | # notice, this list of conditions and the following disclaimer in the |
| 15 | # documentation and/or other materials provided with the distribution. |
| 16 | # 3. Neither the name of the University nor the names of its contributors |
| 17 | # may be used to endorse or promote products derived from this software |
| 18 | # without specific prior written permission. |
| 19 | # |
| 20 | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | # SUCH DAMAGE. |
| 31 | # |
| 32 | # @(#)nodetypes 8.2 (Berkeley) 5/4/95 |
| 33 | |
| 34 | # This file describes the nodes used in parse trees. Unindented lines |
| 35 | # contain a node type followed by a structure tag. Subsequent indented |
| 36 | # lines specify the fields of the structure. Several node types can share |
| 37 | # the same structure, in which case the fields of the structure should be |
| 38 | # specified only once. |
| 39 | # |
| 40 | # A field of a structure is described by the name of the field followed |
| 41 | # by a type. The currently implemented types are: |
| 42 | # nodeptr - a pointer to a node |
| 43 | # nodelist - a pointer to a list of nodes |
| 44 | # string - a pointer to a nul terminated string |
| 45 | # int - an integer |
| 46 | # other - any type that can be copied by assignment |
| 47 | # temp - a field that doesn't have to be copied when the node is copied |
| 48 | # The last two types should be followed by the text of a C declaration for |
| 49 | # the field. |
| 50 | |
| 51 | NSEMI nbinary # two commands separated by a semicolon |
| 52 | type int |
| 53 | ch1 nodeptr # the first child |
| 54 | ch2 nodeptr # the second child |
| 55 | |
| 56 | NCMD ncmd # a simple command |
| 57 | type int |
| 58 | backgnd int # set to run command in background |
| 59 | args nodeptr # the arguments |
| 60 | redirect nodeptr # list of file redirections |
| 61 | |
| 62 | NPIPE npipe # a pipeline |
| 63 | type int |
| 64 | backgnd int # set to run pipeline in background |
| 65 | cmdlist nodelist # the commands in the pipeline |
| 66 | |
| 67 | NREDIR nredir # redirection (of a complex command) |
| 68 | type int |
| 69 | n nodeptr # the command |
| 70 | redirect nodeptr # list of file redirections |
| 71 | |
| 72 | NBACKGND nredir # run command in background |
| 73 | NSUBSHELL nredir # run command in a subshell |
| 74 | |
| 75 | NAND nbinary # the && operator |
| 76 | NOR nbinary # the || operator |
| 77 | |
| 78 | NIF nif # the if statement. Elif clauses are handled |
| 79 | type int # using multiple if nodes. |
| 80 | test nodeptr # if test |
| 81 | ifpart nodeptr # then ifpart |
| 82 | elsepart nodeptr # else elsepart |
| 83 | |
| 84 | NWHILE nbinary # the while statement. First child is the test |
| 85 | NUNTIL nbinary # the until statement |
| 86 | |
| 87 | NFOR nfor # the for statement |
| 88 | type int |
| 89 | args nodeptr # for var in args |
| 90 | body nodeptr # do body; done |
| 91 | var string # the for variable |
| 92 | |
| 93 | NCASE ncase # a case statement |
| 94 | type int |
| 95 | expr nodeptr # the word to switch on |
| 96 | cases nodeptr # the list of cases (NCLIST nodes) |
| 97 | |
| 98 | NCLIST nclist # a case |
| 99 | type int |
| 100 | next nodeptr # the next case in list |
| 101 | pattern nodeptr # list of patterns for this case |
| 102 | body nodeptr # code to execute for this case |
| 103 | |
| 104 | |
| 105 | NDEFUN narg # define a function. The "next" field contains |
| 106 | # the body of the function. |
| 107 | |
| 108 | NARG narg # represents a word |
| 109 | type int |
| 110 | next nodeptr # next word in list |
| 111 | text string # the text of the word |
| 112 | backquote nodelist # list of commands in back quotes |
| 113 | |
| 114 | NTO nfile # fd> fname |
| 115 | NCLOBBER nfile # fd>| fname |
| 116 | NFROM nfile # fd< fname |
| 117 | NFROMTO nfile # fd<> fname |
| 118 | NAPPEND nfile # fd>> fname |
| 119 | type int |
| 120 | next nodeptr # next redirection in list |
| 121 | fd int # file descriptor being redirected |
| 122 | fname nodeptr # file name, in a NARG node |
| 123 | expfname temp char *expfname # actual file name |
| 124 | |
| 125 | NTOFD ndup # fd<&dupfd |
| 126 | NFROMFD ndup # fd>&dupfd |
| 127 | type int |
| 128 | next nodeptr # next redirection in list |
| 129 | fd int # file descriptor being redirected |
| 130 | dupfd int # file descriptor to duplicate |
| 131 | vname nodeptr # file name if fd>&$var |
| 132 | |
| 133 | |
| 134 | NHERE nhere # fd<<\! |
| 135 | NXHERE nhere # fd<<! |
| 136 | type int |
| 137 | next nodeptr # next redirection in list |
| 138 | fd int # file descriptor being redirected |
| 139 | doc nodeptr # input to command (NARG node) |
| 140 | |
| 141 | NNOT nnot # ! command (actually pipeline) |
| 142 | type int |
| 143 | com nodeptr |