m2c_setup_node.m2i

snmp的源代码,已经在我的ubuntu下编译通过

#############################################################  -*- c -*-
## Defaults
## $Id: m2c_setup_node.m2i,v 1.17 2004/09/28 00:18:39 rstory Exp $
########################################################################
@if "$m2c_node_name" ne "$node"@
## if $node.accessible != 1, might be inaccessible index node
@  eval $m2c_node_name = $node@
@  eval $m2c_node_skip_mapping = $m2c_table_skip_mapping@
@  eval $m2c_node_needlength = $node.needlength@
@  eval $m2c_node_get_comments = ""@
@  eval $m2c_node_set_comments = ""@
@  eval $m2c_node_skip_get = 0@
##//how should a function handle a pointer to a buffer that is to small?
@  eval $m2c_node_realloc = 0@ // 0=fail, 1=realloc, 2=malloc
########################################################################
## fix some declarations
########################################################################
@  if $node.enums == 1@
##
@    if $m2c_node_skip_mapping == -1@
@       eval $m2c_node_skip_mapping = 0@
@    end@
##
## validate some assumptions
##
@    if ("$node.perltype" ne "INTEGER") && ("$node.perltype" ne "BITS")@
@       print "$node had enums, but isn't INTEGER or BITS! ($node.perltype)\n"@
@       exit@
@    end@
@    if $node.ranges == 1@
@       print "$node has enums and ranges!\n"@
@       exit@
@    end@
##
##   for a TC, prefix definition w/syntax to reduce collisions
##
@    if $node.syntax ne $node.perltype@
@       eval $m2c_de_pfx = "${m2c_const_pfx}$node.syntax"@
@    else@
@       eval $m2c_de_pfx = "${m2c_const_pfx}$node"@
@    end@
@    if $m2c_const_lc == 0@
@       eval $m2c_de_pfx = uc($m2c_de_pfx)@
@    end@
@    if "$node.perltype" eq "BITS"@
@       eval $m2c_enum_mask="${m2c_de_pfx}_MASK"@
@       if $m2c_const_lc == 0@
@          eval $m2c_enum_mask = uc($m2c_enum_mask)@
@       end@
@    end@
##
##   use longs for enums (w/out length)
##
@    eval $m2c_decl = "u_long"@
@    eval $m2c_node_needlength = 0@
@    if "$node.perltype" eq "BITS"@
@      eval $m2c_node_skip_get = 1@
@    end@
@  else@
@    eval $m2c_decl = $node.decl@
@  end@
########################################################################
## find max size
########################################################################
@  if $node.ranges == 1@
##
## I do not *think* you can have both...
##
@    if $node.enums == 1@
@       print "$node has enums and ranges!\n"@
@       exit@
@    end@
@    eval $m2c_node_maxlen = 0@
@    foreach $a $b range $node@
@      eval $m2c_node_maxlen = max($m2c_node_maxlen,$b)@
@    end@
@  elsif "$node.type" eq "ASN_OBJECT_ID"@
@    eval $m2c_node_maxlen = 128@
@  else@ #ranges
@    eval $m2c_node_maxlen = 65535@
@  end@ #ranges
##/*####################################################################
## set up extra params, based on if we need length
########################################################################
## VAR_VAL     : variable value.
## VAR_VAL_PTR : pointer to variable value.
## VAR_REF     : variable reference. (pointer to pointer to variable value)
##*/
@  if "x$m2c_node_var_name" eq "x"@
@    eval $m2c_node_var_name="var->"@
@  end@
@  eval $m2c_node_var_val_ptr = "($m2c_decl *)${m2c_node_var_name}val.string"@
@  if $m2c_node_needlength == 1@
@    eval $m2c_XX = "($m2c_decl **)&${m2c_node_var_name}val.string,"@
@    eval $m2c_node_var_ref = "$m2c_XX &${m2c_node_var_name}val_len"@
@    eval $m2c_node_var_val = "$m2c_node_var_val_ptr, ${m2c_node_var_name}val_len"@
@  else@
@    eval $m2c_node_var_ref = "($m2c_decl *)${m2c_node_var_name}val.string"@
@    eval $m2c_node_var_val = "*($m2c_node_var_val_ptr)"@
@  end@
##
##
@  eval $m2c_node_param_val_name = "${node}_val"@
@  eval $m2c_node_param_val_lname = "${m2c_node_param_val_name}_len"@
@  eval $m2c_node_param_ref_name = "${m2c_node_param_val_name}_ptr"@
@  if $m2c_node_needlength == 1@
@    eval $m2c_node_param_val_name = "${m2c_node_param_val_name}_ptr"@
@    eval $m2c_node_param_val_lname = "${m2c_node_param_val_name}_len"@
@    eval $m2c_node_param_val_call = "${m2c_node_param_val_name}, ${m2c_node_param_val_lname}"@
@    eval $m2c_node_param_ref_name = "${m2c_node_param_ref_name}_ptr"@
@    eval $m2c_node_param_ref_lname = "${m2c_node_param_val_lname}_ptr"@
@    eval $m2c_XX = "$m2c_decl **$m2c_node_param_ref_name,"@
@    eval $m2c_node_param_ref = "$m2c_XX size_t *$m2c_node_param_ref_lname"@
@    eval $m2c_XX = "$m2c_decl *$m2c_node_param_val_name,"@
@    eval $m2c_node_param_val = "$m2c_XX  size_t $m2c_node_param_val_lname"@
@  else@
@    eval $m2c_node_param_ref = "$m2c_decl * $m2c_node_param_ref_name"@
@    eval $m2c_node_param_val = "$m2c_decl $m2c_node_param_val_name"@
@    eval $m2c_node_param_val_call = "$m2c_node_param_val_name"@
##
@  end@
##
########################################################################
## include user overrides
########################################################################
@  include -ifexists default-node-${node}.m2d@
########################################################################
##
########################################################################
@  if $m2c_get_use_temp == 1@
@    eval $m2c_node_lh = "temp_$node"@
@    eval $m2c_node_lhs = "temp_${node}_len"@
@  else@
@    eval $m2c_node_lh = "(* $m2c_node_param_ref_name )"@
@    eval $m2c_node_lhs = "(* $m2c_node_param_ref_lname )"@
@  end@
@  eval $m2c_ctx_lh="$m2c_node_lh"@
@  eval $m2c_ctx_lhs="$m2c_node_lhs"@
@  eval $m2c_ctx_rh="${m2c_data_item}${node}"@
@  eval $m2c_ctx_rhs="${m2c_data_item}${node}_len"@
########################################################################
##
########################################################################
@  if $m2c_node_skip_mapping != 1@
@    if $m2c_node_needlength == 1@
@      eval $m2c_XX="$m2c_decl **mib_$m2c_node_param_ref_name,"@
@      eval $m2c_XX="$m2c_XX size_t *mib_$m2c_node_param_ref_lname,"@
@      eval $m2c_XX="$m2c_XX $m2c_decl *raw_$m2c_node_param_val_name,"@
@      eval $m2c_XX="$m2c_XX size_t raw_$m2c_node_param_val_lname,"@
@      eval $m2c_node_map_param="$m2c_XX int allow_realloc"@
@    else@
@      eval $m2c_XX="$m2c_decl *mib_$m2c_node_param_ref_name,"@
@      eval $m2c_node_map_param="$m2c_XX $m2c_decl raw_$m2c_node_param_val_name"@
@    end@
@  end@
########################################################################
##
########################################################################
@  eval $m2c_node_srh = "$m2c_node_param_val_name"@
@  eval $m2c_node_srhs = "$m2c_node_param_val_lname"@
@end@
########################################################################
##
@eval $m2c_node_summary="$node($node.subid)/$node.syntax/$node.type/$node.decl($m2c_decl)/"@
@if $node.needlength == 0@
@   eval $m2c_node_summary="$m2c_node_summary/l"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/L"@
@end@
@if $node.noaccess == 0@
@   eval $m2c_node_summary="$m2c_node_summary/A"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/a"@
@end@
@if $node.settable == 0@
@   eval $m2c_node_summary="$m2c_node_summary/w"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/W"@
@end@
@if $node.enums == 0@
@   eval $m2c_node_summary="$m2c_node_summary/e"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/E"@
@end@
@if $node.ranges == 0@
@   eval $m2c_node_summary="$m2c_node_summary/r"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/R"@
@end@
@if $node.hasdefval == 0@
@   eval $m2c_node_summary="$m2c_node_summary/d"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/D"@
@end@
@if $node.hashint == 0@
@   eval $m2c_node_summary="$m2c_node_summary/h"@
@else@
@   eval $m2c_node_summary="$m2c_node_summary/H"@
@end@
########################################################################
@if "$m2c_data_context" eq "generated"@
@   eval $m2c_nvv_sizeof = "$m2c_data_item$node"@
@end@
########################################################################
@  ifconf default-node-${node}.m2d@
@  else@
@    push@
@    open default-node-${node}.m2d@
@    eval $m2c_conf_comment = "##"@
@    eval $m2c_conf_comment_divider = "########################################################################"@
$m2c_conf_comment_divider
$m2c_conf_comment
$m2c_conf_comment mib2c node setting for $node
$m2c_conf_comment
$m2c_conf_comment Remove the '##' comment delimeter to change settings
$m2c_conf_comment
$m2c_conf_comment_divider
$m2c_conf_comment Node declaration type? This is the C type to be used when
$m2c_conf_comment declaring a variable to hold a value for this column. It
$m2c_conf_comment is strongly recommended that you do not change this value.
$m2c_conf_comment If you do, it is likely to break lots of generated code that
$m2c_conf_comment you will have to fix.
$m2c_conf_comment
$m2c_conf_comment @eval $@m2c_decl = $m2c_decl@
$m2c_conf_comment
$m2c_conf_comment_divider
$m2c_conf_comment Generate/use mapping functions? Useful if the MIB defines
$m2c_conf_comment a different format or enumerations than you data store uses.
$m2c_conf_comment
$m2c_conf_comment @eval $@m2c_node_skip_mapping = $m2c_node_skip_mapping@
$m2c_conf_comment
$m2c_conf_comment_divider
$m2c_conf_comment Need a length for the value? Most OCTET-STRING based values will
$m2c_conf_comment need a length, most other types will not. Do not change this one
$m2c_conf_comment unless you know what you are doing! You will almost certainly need
$m2c_conf_comment to fix lots of generated code if you do.
$m2c_conf_comment
$m2c_conf_comment @eval $@m2c_node_needlength = $m2c_node_needlength@
$m2c_conf_comment
$m2c_conf_comment_divider
$m2c_conf_comment Skip get? Set this to 1 if you do not want to implement a value
$m2c_conf_comment for this column.
$m2c_conf_comment
$m2c_conf_comment @eval $@m2c_node_skip_get = $m2c_node_skip_get@
$m2c_conf_comment
@      if $m2c_node_needlength == 1@
$m2c_conf_comment_divider
$m2c_conf_comment Allow realloc when data size exceeds length? If your data
$m2c_conf_comment store for this node is a pointer allocated with one of the
$m2c_conf_comment alloc family functions, you can set this to 1 to use realloc
$m2c_conf_comment when a new value length exceeds the old lenght. If you are
$m2c_conf_comment using a fixed size buffer, this value should be 0.
$m2c_conf_comment
$m2c_conf_comment @eval $@m2c_node_realloc = $m2c_node_realloc@
@      end@
@    close default-node-${node}.m2d@
@    pop@
@  end@