X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-tcl.git;a=blobdiff_plain;f=base%2Ftcmdifgen;h=d5e662234ddba0951fb59b300469b22a3e9821d3;hp=5cd076e1a97deb8c9475db7c23c233e798ce2ae6;hb=82f88c53ddb84e42c770c23feb9bb0ee18341188;hpb=b6017ccf067a7fefa893c8bf19288a1909f17263 diff --git a/base/tcmdifgen b/base/tcmdifgen index 5cd076e..d5e6622 100755 --- a/base/tcmdifgen +++ b/base/tcmdifgen @@ -1,5 +1,124 @@ #!/usr/bin/perl +# Input format is line-based, ws-significant, offside rule (some kind +# of, anyway). +# +# Type TYPE: C-TYPE-DECLARATOR +# Defines TYPE as a type (for arguments and return values) +# which corresponds to the C type specified. C-TYPE-DECLARATOR +# must contain one `@' where the identifier would go. +# The type may contain allocated memory, etc., in which case +# `Init' and `Fini' must be used. +# +# TYPE may be either TYPENAME or TYPENAME(ARGS) - in this case, +# ARGS should be C argument declarations as for in a function +# prototype, of extra arguments for the application-supplied +# parser/returner functions. Each time a TYPE is used elsewhere, +# the ARGS should be the actual arguments to pass, and will be +# textually copied into the calls to the parser/returner +# functions. +# +# `Type' causes declarations in the .h file of these functions: +# int cht_pat_TYPENAME(Tcl_Interp*, Tcl_Obj *obj, C-TYPE *val, ARGS); +# Tcl_Obj *cht_ret_TYPENAME(Tcl_Interp*, C-TYPE val, ARGS); +# +# cht_pat_... must attempt to parse obj into the appropriate type. +# val will already have been initialised with `Init' statements if +# relevant. Whether cht_pat_... fails or succeeds it may allocate +# memory into the object and must leave the object valid (for +# `Fini'). +# +# cht_ret_... must convert the value back to a new Tcl_Obj. It may +# not fail. +# +# Init TYPENAME C-STATEMENTS +# Provides some statements which are used to initialise a variable +# of type TYPENAME. C-STATEMENTS should contain one or more `@', +# which will be replaced by the actual variable name. The +# variable will have been declared with the C declarator specified +# with `Type'. C-STATEMENTS may not fail or longjmp, and they may +# not allocate memory or other resources. If no `Init' is +# supplied then there is no invariant (so no `Fini' may be +# supplied either, and the type is `flat' - no memory, external +# refs, etc.) +# +# Fini TYPENAME C-STATEMENTS +# Provides some statements (like `Init') which are used to free a +# variable of type TYPENAME. The variable will already have been +# initialised with the `Init' statements, and may have been +# modified since by application per-type or per-command code. Its +# invariant will be satisfied before C-STATEMENTS. Afterwards the +# invariant may or may not be satisfied, but it may not have any +# memory or other resources allocated. C-STATEMENTS may not fail +# or longjmp. +# +# H-Include C-INCLUDE-SPECIFIER +# Arranges for generated .h files to #include the specified +# file. C-INCLUDE-SPECIFIER should include the <..> or "..". +# +# Table TABLENAME C-ENTRY-TYPE +# Starts a table of commands or subcommands. The generated .h +# will contain a definition of C-ENTRY-TYPE containing +# const char *name; +# Tcl_ObjCmdProc *func; +# and the generated .c will contain +# const C-ENTRY-TYPE C-ARRAY-NAME[]; +# where C-ARRAY-NAME is TABLENAME, with `_entries' appended +# and `cht_' prepended. The entries are indented one level (one +# or more spaces) and look like this: +# ENTRYNAME +# FORMALARGNAME TYPE +# ... +# [ => RESULT-TYPE ] +# This will cause the declaration of +# int cht_do_TABLENAME_ENTRYNAME(ClientData cd, Tcl_Interp *ip, +# FORMAL-ARGUMENTS, RESULT-C-TYPE*); +# which is the procedure which the application must supply to +# implement the function. If the `=> RESULT-TYPE' is omitted, so +# is the result argument to the function. Each argument to the +# function is of the C type corresponding to the specified type. +# The cht_do_... function should not eat any memory associated with +# the arguments. The result buffer (if any) will be initialised +# using the `Init' and should on success contain the relevant +# result. On failure it should leave the result unmodified (or at +# least, not in need of freeing). +# +# There will be an entry in C-ARRAY-NAME for every table entry. +# The name will be ENTRYNAME, and the func will be a function +# suitable for use as a Tcl command procedure, which parses the +# arguments, processes the command, and sets any result, as +# applicable. +# +# ExtraEntry C-ENTRY-TYPE +# Introduces a section of additional C code which will be inserted +# into the definition of C-ENTRY-TYPE by `Table'. The C +# code, which follows on several indented lines, should be +# structure member definitions. +# +# When ExtraEntry is used, in the corresponding Table, each +# ENTRYNAME should be followed on the same line by whitespace and +# EXTRA-VALUES; the EXTRA-VALUES are used as initialisers for the +# additional structure elements. +# +# NoEntryDefine C-ENTRY-TYPE +# Prevents the definition of C-ENTRY-TYPE by Table. +# The C type must be defined elsewhere. +# +# Also expected are these functions: +# void cht_setstringresult(Tcl_Interp*, const char*); +# sets the Tcl result from the supplied string +# int cht_pat_enum(Tcl_Interp*, Tcl_Obj*, const void **c_e_t_array, +# const void *c_e_t_return, size_t c_e_t_sz, const char *what); +# scans a table of C-ENTRY-TYPEs looking for the +# string matching the string supplied by the script +# (as a Tcl_Obj). On error sets the result, using +# what (a noun phrase describing the type of thing). +# Assumes (unportably!) that the name and func members +# are in the same places no matter what the rest of +# the struct contains. +# and the two predefined types `int' (C `int') and `obj' (Tcl_Obj*, +# unmodified.) The corresponding definitions are in tcmdiflib.c. + use IO; use Data::Dumper; @@ -7,8 +126,9 @@ parse('builtins','DATA'); while (@ARGV) { $_= shift @ARGV; - if (m/^\-p(\w+)/) { + if (m/^\-p([-_0-9a-z]+)$/) { $prefix= $1; + $prefix =~ y/-/_/; } elsif (m/^\-w(c|h)$/) { $write= $1; } elsif (m/^\-o(.+)$/) { @@ -30,6 +150,17 @@ sub zilch () { undef $c_of; } +sub enumargs ($) { + my ($a) = @_; + $a =~ m:/(.*),: or die "invalid enum type \`$a'\n"; + my ($a_tab, $ee_type, $estr) = ($`,$1,$'); + if ($ee_type !~ m/^[^_]/) { + $ee_type= $a_tab.$ee_type; + $a_tab= lc($a_tab).'_entries'; + } + return ($a_tab, $ee_type, $estr); +} + sub parse ($$) { my ($wh,$f) = @_; while (defined($_= $f->getline)) { @@ -51,7 +182,7 @@ sub parse ($$) { zilch(); $c_table= $1; $table_x{$c_table}{C}= $2; - $entrytype_x{$2}= ''; + $entrytype_x{$2}= '' unless exists $entrytype_x{$2}; } elsif (@i==0 && m/^Untabled$/) { zilch(); $c_table= ''; @@ -60,6 +191,9 @@ sub parse ($$) { } elsif (@i==0 && m/^EntryExtra\s+(\w+)$/) { zilch(); $c_entryextra= $1; + } elsif (@i==0 && m/^NoEntryDefine\s+(\w+)$/) { + zilch(); + $entrytype_x{$1}= " "; } elsif (@i>=1 && defined $c_entryextra) { $entrytype_x{$c_entryextra} .= " $_\n"; } elsif (@i==1 && m/^[a-z].*$/ && defined $c_table) { @@ -109,19 +243,20 @@ foreach $t (sort keys %types) { $type= $types{$t}; $c= $type->{C}; $xta= $type->{X}; - $decl= "int pat_$t(Tcl_Interp *ip, Tcl_Obj *obj, "; + $decl= "int cht_pat_$t(Tcl_Interp *ip, Tcl_Obj *obj, "; $decl .= subst_in_decl('*val', $c, "type $t"); $decl .= ", $xta", if length $xta; $decl .= ");\n"; o('h',160, $decl); - $decl= "Tcl_Obj *ret_$t(Tcl_Interp *ip, ".subst_in_decl('val',$c); + $decl= "Tcl_Obj *cht_ret_$t(Tcl_Interp *ip, ".subst_in_decl('val',$c); $decl .= ", $xta" if length $xta; $decl .= ");\n"; o('h',170, $decl); } foreach $c_entrytype (sort keys %entrytype_x) { + next if $entrytype_x{$c_entrytype} =~ m/^\s$/; o('h', 20, "typedef struct $c_entrytype $c_entrytype;\n"); o('h', 100, "struct $c_entrytype {\n". @@ -141,7 +276,7 @@ foreach $c_table (sort keys %tables) { $r_entry= $r_table->{$c_entry}; $pa_decl= "int pa_${c_table}_${c_entry_c}(ClientData cd,". " Tcl_Interp *ip, int objc, Tcl_Obj *const *objv)"; - $do_decl= "int do_${c_table}_${c_entry_c}("; + $do_decl= "int cht_do_${c_table}_${c_entry_c}("; @do_al= ('ClientData cd', 'Tcl_Interp *ip'); @do_aa= qw(cd ip); $pa_init= ''; @@ -186,15 +321,14 @@ foreach $c_table (sort keys %tables) { $pa_vars .= " const void *v_$n= 0;\n"; $paarg= "&v_$n"; $pafin= "\n a_$n= v_$n; "; - $a =~ m/\,/ or die "invalid enum type \`$a'\n"; - $a_tab = lc($`).'s'; - $a = "$a_tab, sizeof($`), $'"; - o('h', 210, "extern const $` $a_tab".'[]'.";\n"); + ($a_tab, $ee_type, $estr) = enumargs($a); + $a = "cht_$a_tab, sizeof($ee_type), $estr"; + o('h', 210, "extern const $ee_type cht_$a_tab".'[]'.";\n"); } if (exists $type_fini{$t}) { $pa_fini .= ' '.subst_in("a_$n", $type_fini{$t})."\n"; } - $pa_body .= " rc= pat_$t(ip, *objv++, $paarg"; + $pa_body .= " rc= cht_pat_$t(ip, *objv++, $paarg"; $pa_body .= ", ".$a if length $a; $pa_body .= ");$pafin if (rc) goto rc_err;\n"; push @do_aa, "a_$n"; @@ -217,16 +351,16 @@ foreach $c_table (sort keys %tables) { if (exists $r_entry->{R}) { $t= $r_entry->{R}; $xta= $r_entry->{X}; - push @do_al, make_decl("*result", $t, "do_al result"); + push @do_al, make_decl("*result", $t, "cht_do_al result"); $pa_vars .= make_decl_init("result", $t, $xta, \$pa_init, "pa_vars result"); push @do_aa, "&result"; - $pa_rslt .= " Tcl_SetObjResult(ip, ret_$t(ip, result"; + $pa_rslt .= " Tcl_SetObjResult(ip, cht_ret_$t(ip, result"; $pa_rslt .= ", $xta" if length $xta; $pa_rslt .= "));\n"; } $pa_body .= "\n"; - $pa_body .= " rc= do_${c_table}_${c_entry_c}("; + $pa_body .= " rc= cht_do_${c_table}_${c_entry_c}("; $pa_body .= join ', ', @do_aa; $pa_body .= ");\n"; $pa_body .= " if (rc) goto rc_err;\n"; @@ -245,7 +379,7 @@ foreach $c_table (sort keys %tables) { $pa_vars .= " const char *e;\n"; $pa_fini .= "\n"; $pa_fini .= "e_err:\n"; - $pa_fini .= " setstringresult(ip,e);\n"; + $pa_fini .= " cht_setstringresult(ip,e);\n"; $pa_fini .= " rc= TCL_ERROR; goto rc_err;\n"; } $pa_vars .= "\n"; @@ -278,7 +412,7 @@ foreach $c_table (sort keys %tables) { $r_entry->{I}); } if (length $c_table) { - $decl= "const $x_table->{C} ".lc($x_table->{C}).'s[]'; + $decl= "const $x_table->{C} cht_${c_table}_entries[]"; o('h', 500, "extern $decl;\n"); o('c', 100, "$decl = {\n". @@ -292,13 +426,7 @@ o(c, 0, "#include \"$prefix.h\"\n"); o(h, 0, "#ifndef INCLUDED_\U${prefix}_H\n". - "#define INCLUDED_\U${prefix}_H\n\n". - "#include \n"); - -o(h, 400, - "void setstringresult(Tcl_Interp*, const char*);\n". - "int pat_enum(Tcl_Interp*, Tcl_Obj*, const void**,". - " const void*, size_t, const char *what);\n"); + "#define INCLUDED_\U${prefix}_H\n\n"); o(h, 999, "#endif /*INCLUDED_\U${prefix}_H*/\n"); @@ -359,8 +487,8 @@ sub make_decl ($$$$) { my ($n, $t, $ta, $why) = @_; my ($type); if ($t eq 'enum') { - $ta =~ m/\,/ or die "invalid enum type \`$t' ($why)\n"; - $c= "const $` *@"; + ($a_tab, $ee_type, $estr) = enumargs($ta); + $c= "const $ee_type* @"; } else { defined $types{$t} or die "unknown type $t ($why)\n"; $c= $types{$t}{C}; @@ -389,5 +517,3 @@ sub badsyntax ($$$) { __DATA__ Type int: int Type obj: Tcl_Obj *@ - -Type charfrom(const char *opts, const char *what): int