git.m6w6.name Git - m6w6/ext-psi/blob - m4/psi_struct.m4

   1 # psi_add_struct(struct members)
   2 # Add a pre-defined struct to $PSI_STRUCTS.
   3 psi_add_struct() {
   4         cat >>$PSI_STRUCTS <<<" $1, {0}, "
   5 }
   6
   7 dnl PSI_STRUCT_MEMBER(struct name, decl member)
   8 dnl INTERNAL: build $psi_struct_members
   9 AC_DEFUN(PSI_STRUCT_MEMBER, [
  10         m4_define([member_name], PSI_VAR_NAME($2))
  11         m4_define([member_type], PSI_VAR_TYPE($2))
  12         PSI_CHECK_SIZEOF(AS_TR_SH($1)[_]member_name,
  13                 [#define ]AS_TR_SH($1)[_]member_name (($1 *)0)->member_name
  14         )
  15         if PSI_SH_TEST_SIZEOF($1 member_name); then
  16                 PSI_CHECK_OFFSETOF($1, member_name)
  17                 PSI_TYPE_INDIRECTION($2, [PSI_SH_SIZEOF([$1 member_name])], pl, as)
  18
  19                 psi_member_sizeof=PSI_SH_SIZEOF($1 member_name)
  20                 psi_member_offsetof=PSI_SH_OFFSETOF($1 member_name)
  21
  22                 if test $pl -gt 0 && test $as -eq 0; then
  23                         check_size=PSI_SH_SIZEOF(void *)
  24                 elif test $pl -eq 1 && test $as -gt 0; then
  25                         check_size=`expr PSI_SH_SIZEOF(member_type) \* $as`
  26                 else
  27                         check_size=PSI_SH_SIZEOF(member_type)
  28                 fi
  29                 if test $psi_member_sizeof != "$check_size"; then
  30                         psi_member_basic_type=PSI_SH_BASIC_TYPE(member_type)
  31                         psi_member_type_pair="`psi_type_pair $psi_member_basic_type $psi_member_sizeof`"
  32                         psi_struct_members="$psi_struct_members, {$psi_member_type_pair, \"[]member_name[]\", $psi_member_offsetof, $psi_member_sizeof, $pl, $as}"
  33                         AC_MSG_WARN(pre-defined size $check_size of $2 in $1 does not match computed size $psi_member_sizeof; adjusting to $psi_member_type_pair)
  34                 else
  35                         psi_struct_members="[$psi_struct_members, {]PSI_TYPE_PAIR(member_type)[, \"]member_name[\", $psi_member_offsetof, $psi_member_sizeof, $pl, $as}]"
  36                 fi
  37         fi
  38 ])
  39
  40 dnl PSI_STRUCT(struct name, struct members)
  41 dnl Check a struct and its members and add a pre-defined struct and possibly a
  42 dnl pre-defined type for this struct.
  43 dnl Calls PSI_CHECK_SIZEOF for the struct and each member.
  44 dnl Calls PSI_CHECK_OFFSETOF and PSI_TYPE_INDIRECTON for each member.
  45 AC_DEFUN(PSI_STRUCT, [
  46         PSI_CHECK_SIZEOF($1)
  47         psi_struct_name=m4_bregexp([$1], [^\(struct \)?\(\w+\)], [\2])
  48         psi_struct_members="{PSI_T_STRUCT, \"struct\", \"$psi_struct_name\", 0, $AS_TR_SH([ac_cv_sizeof_]$1), 0, 0}"
  49         ifelse([$2],,,[m4_map_args_sep([PSI_STRUCT_MEMBER($1, m4_normalize(], [))], [], $2)])
  50         psi_add_struct "$psi_struct_members"
  51         if test "$1" = "$psi_struct_name"; then
  52                 psi_add_type "{PSI_T_STRUCT, \"$1\", \"$1\"}"
  53         fi
  54 ])