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 # psi_add_union(union/struct members)
   8 # Add a pre-defined union to $PSI_UNIONS.
   9 psi_add_union() {
  10         cat >>$PSI_UNIONS <<<"  $1, {0}, "
  11 }
  12
  13 dnl PSI_STRUCT_MEMBER(struct name, decl member)
  14 dnl INTERNAL: build $psi_struct_members
  15 AC_DEFUN(PSI_STRUCT_MEMBER, [
  16         m4_define([member_name], PSI_VAR_NAME($2))
  17         m4_define([member_type], PSI_VAR_TYPE($2))
  18         PSI_CHECK_SIZEOF(AS_TR_SH($1)[_]member_name,
  19                 [#define ]AS_TR_SH($1)[_]member_name (($1 *)0)->member_name
  20         )
  21         if PSI_SH_TEST_SIZEOF($1 member_name); then
  22                 PSI_CHECK_OFFSETOF($1, member_name)
  23                 PSI_TYPE_INDIRECTION($2, [PSI_SH_SIZEOF([$1 member_name])], pl, as)
  24
  25                 psi_member_sizeof=PSI_SH_SIZEOF($1 member_name)
  26                 psi_member_offsetof=PSI_SH_OFFSETOF($1 member_name)
  27
  28                 if test $pl -gt 0 && test $as -eq 0; then
  29                         check_size=PSI_SH_SIZEOF(void *)
  30                 elif test $pl -eq 1 && test $as -gt 0; then
  31                         check_size=`expr PSI_SH_SIZEOF(member_type) \* $as`
  32                 else
  33                         check_size=PSI_SH_SIZEOF(member_type)
  34                 fi
  35                 if test $psi_member_sizeof != "$check_size"; then
  36                         psi_member_basic_type=PSI_SH_BASIC_TYPE(member_type)
  37                         psi_member_type_pair="`psi_type_pair $psi_member_basic_type $psi_member_sizeof`"
  38                         psi_struct_members="$psi_struct_members, {$psi_member_type_pair, \"[]member_name[]\", $psi_member_offsetof, $psi_member_sizeof, $pl, $as}"
  39                         AC_MSG_WARN(pre-defined size $check_size of $2 in $1 does not match computed size $psi_member_sizeof; adjusting to $psi_member_type_pair)
  40                 else
  41                         psi_struct_members="[$psi_struct_members, {]PSI_TYPE_PAIR(member_type)[, \"]member_name[\", $psi_member_offsetof, $psi_member_sizeof, $pl, $as}]"
  42                 fi
  43         fi
  44 ])
  45
  46 dnl PSI_STRUCT(struct name, struct members)
  47 dnl Check a struct and its members and add a pre-defined struct and possibly a
  48 dnl pre-defined type for this struct.
  49 dnl Calls PSI_CHECK_SIZEOF and PSI_CHECK_ALIGNOF for the struct.
  50 dnl Calls PSI_CHECK_SIZEOF, PSI_CHECK_OFFSETOF and PSI_TYPE_INDIRECTON for each member.
  51 AC_DEFUN(PSI_STRUCT, [
  52         PSI_CHECK_SIZEOF($1)
  53         PSI_CHECK_ALIGNOF($1)
  54         psi_struct_name=m4_bregexp([$1], [^\(struct \)?\(\w+\)], [\2])
  55         psi_struct_members="{PSI_T_STRUCT, \"struct\", \"$psi_struct_name\", PSI_SH_ALIGNOF($1), PSI_SH_SIZEOF($1), 0, 0}"
  56         ifelse([$2],,,[m4_map_args_sep([PSI_STRUCT_MEMBER($1, m4_normalize(], [))], [], $2)])
  57         psi_add_struct "$psi_struct_members"
  58         if test "$1" = "$psi_struct_name"; then
  59                 psi_add_type "{PSI_T_STRUCT, \"$1\", \"$1\"}"
  60         fi
  61 ])
  62
  63 dnl PSI_UNION(union name, union/struct members)
  64 dnl Check a union and its members and add a pre-defined union and possibly a
  65 dnl pre-defined type for this union.
  66 dnl Calls PSI_CHECK_SIZEOF for the union and each member.
  67 dnl Calls PSI_CHECK_OFFSETOF and PSI_TYPE_INDIRECTON for each member.
  68 AC_DEFUN(PSI_UNION, [
  69         PSI_CHECK_SIZEOF($1)
  70         PSI_CHECK_ALIGNOF($1)
  71         psi_struct_name=m4_bregexp([$1], [^\(union \)?\(\w+\)], [\2])
  72         psi_struct_members="{PSI_T_UNION, \"union\", \"$psi_struct_name\", PSI_SH_ALIGNOF($1), PSI_SH_SIZEOF($1), 0, 0}"
  73         ifelse([$2],,,[m4_map_args_sep([PSI_STRUCT_MEMBER($1, m4_normalize(], [))], [], $2)])
  74         psi_add_union "$psi_struct_members"
  75         if test "$1" = "$psi_struct_name"; then
  76                 psi_add_type "{PSI_T_UNION, \"$1\", \"$1\"}"
  77         fi
  78 ])