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bird/filter/decl.m4

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m4_divert(-1)m4_dnl
#
# BIRD -- Construction of per-instruction structures
#
# (c) 2018 Maria Matejka <mq@jmq.cz>
#
# Can be freely distributed and used under the terms of the GNU GPL.
#
#
# Global Diversions:
# 4 enum fi_code
# 5 enum fi_code to string
# 6 dump line item
# 7 dump line item callers
# 1 struct f_inst_FI_...
# 2 union in struct f_inst
# 3 constructors
#
# Per-inst Diversions:
# 101 content of struct f_inst_FI_...
# 102 constructor arguments
# 103 constructor body
# 104 dump line item content
#
# Diversions for TARGET=C: 8xx
# Diversions for TARGET=H: 9xx
# Flush the completed instruction
m4_define(FID_END, `m4_divert(-1)')
m4_dnl m4_debugmode(aceflqtx)
m4_define(FID_ZONE, `m4_divert($1) /* $2 for INST_NAME() */')
m4_define(FID_STRUCT, `FID_ZONE(1, Per-instruction structure)')
m4_define(FID_UNION, `FID_ZONE(2, Union member)')
m4_define(FID_NEW, `FID_ZONE(3, Constructor)')
m4_define(FID_ENUM, `FID_ZONE(4, Code enum)')
m4_define(FID_ENUM_STR, `FID_ZONE(5, Code enum to string)')
m4_define(FID_DUMP, `FID_ZONE(6, Dump line)')
m4_define(FID_DUMP_CALLER, `FID_ZONE(7, Dump line caller)')
m4_define(FID_STRUCT_IN, `m4_divert(101)')
m4_define(FID_NEW_ARGS, `m4_divert(102)')
m4_define(FID_NEW_BODY, `m4_divert(103)')
m4_define(FID_DUMP_BODY, `m4_divert(104)m4_define(FID_DUMP_BODY_EXISTS)')
m4_define(FID_ALL, `m4_ifdef([[FID_CURDIV]], [[m4_divert(FID_CURDIV)m4_undefine([[FID_CURDIV]])]])')
m4_define(FID_C, `m4_ifelse(TARGET, [[C]], FID_ALL, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
m4_define(FID_H, `m4_ifelse(TARGET, [[H]], FID_ALL, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
m4_define(INST_FLUSH, `m4_ifdef([[INST_NAME]], [[
FID_ENUM
INST_NAME(),
FID_ENUM_STR
[INST_NAME()] = "INST_NAME()",
FID_STRUCT
struct f_inst_[[]]INST_NAME() {
m4_undivert(101)
};
FID_UNION
struct f_inst_[[]]INST_NAME() i_[[]]INST_NAME();
FID_NEW
struct f_inst *f_new_inst_]]INST_NAME()[[(enum f_instruction_code fi_code
m4_undivert(102)
)
FID_H
;
FID_C
{
struct f_inst *what_ = cfg_allocz(sizeof(struct f_inst));
what_->fi_code = fi_code;
what_->lineno = ifs->lino;
what_->size = 1;
struct f_inst_[[]]INST_NAME() *what UNUSED = &(what_->i_[[]]INST_NAME());
m4_undivert(103)
return what_;
}
FID_DUMP_CALLER
case INST_NAME(): f_dump_line_item_]]INST_NAME()[[(item, indent + 1); break;
FID_DUMP
m4_ifdef([[FID_DUMP_BODY_EXISTS]],
[[static inline void f_dump_line_item_]]INST_NAME()[[(const struct f_line_item *item, const int indent)]]
,
[[static inline void f_dump_line_item_]]INST_NAME()[[(const struct f_line_item *item UNUSED, const int indent UNUSED)]])
m4_undefine([[FID_DUMP_BODY_EXISTS]])
{
m4_undivert(104)
}
FID_ALL
FID_END
]])')
m4_define(INST, `INST_FLUSH()m4_define([[INST_NAME]], [[$1]])')
m4_define(FID_MEMBER, `m4_dnl
FID_STRUCT_IN
$1 $2;
FID_NEW_ARGS
, $1 $2
FID_NEW_BODY
what->$2 = $2;
m4_ifelse($3,,,[[
FID_DUMP_BODY
debug("%s$3\n", INDENT, $4);
]])
FID_END')
m4_define(ARG, `FID_MEMBER(const struct f_inst *, f$1,,)
FID_NEW_BODY
for (const struct f_inst *child = f$1; child; child = child->next) what_->size += child->size;
FID_END')
m4_define(ARG_ANY, `FID_MEMBER(const struct f_inst *, f$1,,)
FID_NEW_BODY
for (const struct f_inst *child = f$1; child; child = child->next) what_->size += child->size;
FID_END')
m4_define(LINE, `FID_MEMBER(const struct f_inst *, f$1,,)
FID_DUMP_BODY
f_dump_line(item->lines[$2], indent + 1);
FID_END')
m4_define(LINEP, `FID_STRUCT_IN
const struct f_line *fl$1;
FID_DUMP_BODY
f_dump_line(item->lines[$2], indent + 1)
FID_END')
m4_define(SYMBOL, `FID_MEMBER(const struct symbol *, sym, symbol %s, item->sym->name)')
m4_define(VALI, `FID_MEMBER(struct f_val, vali, value %s, val_dump(&item->val))')
m4_define(VALP, `FID_MEMBER(const struct f_val *, valp, value %s, val_dump(&item->val))')
m4_define(VAR, `m4_dnl
FID_STRUCT_IN
const struct f_val *valp;
const struct symbol *sym;
FID_NEW_ARGS
, const struct symbol *sym
FID_NEW_BODY
what->valp = (what->sym = sym)->def;
FID_DUMP_BODY
debug("%svariable %s with value %s\n", INDENT, item->sym->name, val_dump(item->vp));
FID_END')
m4_define(FRET, `FID_MEMBER(enum filter_return, fret, %s, filter_return_str(item->fret))')
m4_define(ECS, `FID_MEMBER(enum ec_subtype, ecs, ec subtype %s, ec_subtype_str(item->ecs))')
m4_define(RTC, `FID_MEMBER(const struct rtable_config *, rtc, route table %s, item->rtc->name)')
m4_define(STATIC_ATTR, `FID_MEMBER(struct f_static_attr, sa)')
m4_define(DYNAMIC_ATTR, `FID_MEMBER(struct f_dynamic_attr, da)')
m4_define(COUNT, `FID_MEMBER(uint, count, number %u, item->count)')
m4_define(TREE, `FID_MEMBER(const struct f_tree *, tree, tree %p, item->tree)')
m4_define(STRING, `FID_MEMBER(const char *, s, string \"%s\", item->s)')
m4_define(FID_WR_PUT_LIST)
m4_define(FID_WR_DROP_LIST)
m4_define(FID_WR_IPUT, `m4_define([[FID_WR_CUR_DIRECT]], m4_eval(FID_WR_CUR_DIRECT + 1))m4_define([[FID_WR_PUT_LIST]], FID_WR_PUT_LIST[[]]FID_WR_DPUT($1)FID_WR_DPUT(FID_WR_CUR_DIRECT))m4_divert(FID_WR_CUR_DIRECT)')
m4_define(FID_WR_IDROP, `m4_define([[FID_WR_CUR_DIRECT]], m4_eval(FID_WR_CUR_DIRECT + 1))m4_define([[FID_WR_DROP_LIST]], FID_WR_DROP_LIST[[]]FID_WR_DPUT($1)FID_WR_DPUT(FID_WR_CUR_DIRECT))m4_divert(FID_WR_CUR_DIRECT)')
m4_define(FID_WR_DIRECT, `m4_define([[FID_WR_CUR_DIRECT]],$1)m4_ifelse(TARGET,[[$2]],[[m4_define([[FID_WR_PUT]], [[FID_WR_IPUT($]][[@)]])m4_define([[FID_WR_PUT_LIST]],FID_WR_PUT_LIST[[]]FID_WR_DPUT($1))]],[[m4_define([[FID_WR_PUT]], [[FID_WR_IDROP($]][[@)]])m4_define([[FID_WR_DROP_LIST]],FID_WR_DROP_LIST[[]]FID_WR_DPUT($1))]])m4_divert($1)')
m4_dnl m4_define(FID_WR_CUR_DIRECT,m4_ifelse(TARGET,`C',800,TARGET,`H',900,m4_errprint(`Bad TARGET: 'TARGET)m4_m4exit(1)))
m4_changequote([[,]])
FID_WR_DIRECT(800,C)
#include "nest/bird.h"
#include "filter/filter.h"
#include "filter/f-inst.h"
/* Instruction codes to string */
static const char * const f_instruction_name_str[] = {
FID_WR_PUT(5)
};
const char *
f_instruction_name(enum f_instruction_code fi)
{
if (fi < (sizeof(f_instruction_name_str) / sizeof(f_instruction_name_str[0])))
return f_instruction_name_str[fi];
else
bug("Got unknown instruction code: %d", fi);
}
/* Instruction constructors */
FID_WR_PUT(3)
/* Line dumpers */
#define INDENT (((const char *) f_dump_line_indent_str) + sizeof(f_dump_line_indent_str) - (indent) - 1)
static const char f_dump_line_indent_str[] = " ";
void f_dump_line(const struct f_line *dest, int indent);
FID_WR_PUT(6)
void f_dump_line(const struct f_line *dest, int indent)
{
if (!dest) {
debug("%sNo filter line (NULL)\n", INDENT);
return;
}
debug("%sFilter line %p (len=%u)\n", INDENT, dest, dest->len);
for (uint i=0; i<dest->len; i++) {
const struct f_line_item *item = &dest->items[i];
debug("%sInstruction %s at line %u\n", INDENT, f_instruction_name(item->fi_code), item->lineno);
switch (item->fi_code) {
FID_WR_PUT(7)
default: bug("Unknown instruction %x in f_dump_line", item->fi_code);
}
}
debug("%sFilter line %p dump done\n", INDENT, dest);
}
FID_WR_DIRECT(900,H)
/* Filter instruction codes */
enum f_instruction_code {
FID_WR_PUT(4)
};
/* Per-instruction structures */
FID_WR_PUT(1)
struct f_inst {
const struct f_inst *next; /* Next instruction */
enum f_instruction_code fi_code; /* Instruction code */
int size; /* How many instructions are underneath */
int lineno; /* Line number */
union {
FID_WR_PUT(2)
};
};
/* Instruction constructors */
FID_WR_PUT(3)
m4_divert(-1)
m4_changequote(`,')
m4_m4wrap(`INST_FLUSH()m4_define(FID_WR_DPUT, [[m4_undivert($1)]])m4_divert(0)FID_WR_PUT_LIST[[]]m4_divert(-1)FID_WR_DROP_LIST[[]]')
m4_changequote([[,]])
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