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Filter: A little cleanup of M4 interpreter generator

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Maria Matejka 2019-06-27 15:55:48 +02:00 committed by Maria Matejka
parent a8ab54d18d
commit 64bb1346c7
1 changed files with 29 additions and 31 deletions
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50
filter/decl.m4
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@ -28,9 +28,8 @@ m4_divert(-1)m4_dnl
# 107 struct f_line_item content
# 108 interpreter body
#
# Diversions for TARGET=I: 7xx
# Diversions for TARGET=C: 8xx
# Diversions for TARGET=H: 9xx
# Final diversions
# 200+ completed text before it is flushed to output
# Flush the completed instruction
m4_define(FID_END, `m4_divert(-1)')
@ -61,10 +60,7 @@ m4_define(FID_INTERPRET_BODY, `m4_divert(108)')
m4_define(FID_ALL, `FID_INTERPRET_BODY');
m4_define(FID_ALL_TARGETS, `m4_ifdef([[FID_CURDIV]], [[m4_divert(FID_CURDIV)m4_undefine([[FID_CURDIV]])]])')
m4_define(FID_C, `m4_ifelse(TARGET, [[C]], FID_ALL_TARGETS, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
m4_define(FID_I, `m4_ifelse(TARGET, [[I]], FID_ALL_TARGETS, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
m4_define(FID_H, `m4_ifelse(TARGET, [[H]], FID_ALL_TARGETS, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
m4_define(FID_HIC, `m4_ifelse(TARGET, [[H]], $1, TARGET, [[I]], $2, TARGET, [[C]], $3)')
m4_define(INST_FLUSH, `m4_ifdef([[INST_NAME]], [[
FID_ENUM
@ -83,19 +79,21 @@ FID_NEW
struct f_inst *f_new_inst_]]INST_NAME()[[(enum f_instruction_code fi_code
m4_undivert(102)
)
FID_H
;
FID_C
{
FID_HIC(
[[;]],
[[]],
[[
{
struct f_inst *what_ = cfg_allocz(sizeof(struct f_inst));
what_->fi_code = fi_code;
what_->lineno = ifs->lino;
what_->size = 1;
#define what (&(what_->i_]]INST_NAME()[[))
m4_undivert(103)
#undef what
#define what (&(what_->i_]]INST_NAME()[[))
[[m4_undivert(103)]]
#undef what
return what_;
}
}
]])
FID_DUMP_CALLER
case INST_NAME(): f_dump_line_item_]]INST_NAME()[[(item, indent + 1); break;
@ -110,7 +108,6 @@ m4_undefine([[FID_DUMP_BODY_EXISTS]])
m4_undivert(104)
#undef item
}
FID_ALL_TARGETS
FID_LINEARIZE
case INST_NAME(): {
@ -253,18 +250,16 @@ m4_define(TREE, `FID_MEMBER(const struct f_tree *, tree, tree, [[!same_tree(f1->
m4_define(STRING, `FID_MEMBER(const char *, s, s, [[strcmp(f1->s, f2->s)]], string \"%s\", item->s)')
m4_define(FID_WR_PUT_LIST)
m4_define(FID_WR_DROP_LIST)
m4_define(FID_WR_PUT_ALSO, `m4_define([[FID_WR_PUT_LIST]],FID_WR_PUT_LIST()[[FID_WR_DPUT(]]FID_WR_DIDX[[)FID_WR_DPUT(]]$1[[)]])m4_define([[FID_WR_DIDX]],m4_eval(FID_WR_DIDX+1))m4_divert(FID_WR_DIDX)')
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_ifelse(TARGET,[[$1]],[[FID_WR_INIT()]],[[FID_WR_STOP()]])')
m4_define(FID_WR_INIT, `m4_define([[FID_WR_DIDX]],200)m4_define([[FID_WR_PUT]],[[FID_WR_PUT_ALSO($]][[@)]])m4_divert(200)')
m4_define(FID_WR_STOP, `m4_define([[FID_WR_PUT]])m4_divert(-1)')
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(700,I)
FID_WR_DIRECT(I)
FID_WR_PUT(10)
FID_WR_DIRECT(800,C)
FID_WR_DIRECT(C)
#include "nest/bird.h"
#include "filter/filter.h"
#include "filter/f-inst.h"
@ -370,7 +365,7 @@ FID_WR_PUT(9)
}
FID_WR_DIRECT(900,H)
FID_WR_DIRECT(H)
/* Filter instruction codes */
enum f_instruction_code {
FID_WR_PUT(4)
@ -403,6 +398,9 @@ 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_define(FID_CLEANUP, `m4_ifelse($1,$2,,[[m4_undivert($1)FID_CLEANUP(m4_eval($1+1),$2)]])')
m4_define(FID_WR_DPUT, `m4_undivert($1)')
m4_m4wrap(`INST_FLUSH()m4_divert(0)FID_WR_PUT_LIST()m4_divert(-1)FID_CLEANUP(1,200)')
m4_changequote([[,]])