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implement Sh92;
include "sys.m";
include "draw.m";
include "sh9util.m";
include "sh9parser.m";
sys: Sys;
sh9u: Sh9Util;
sh9p: Sh9Parser;
Sh92: module {
init: fn(nil: ref Draw->Context, nil: list of string);
};
GrammarNode: import sh9p;
ModProc: import sh9p;
ModVar: import sh9p;
ShModule: import sh9p;
ParserCtx: import sh9p;
TokNode: import sh9p;
mk_tok: import sh9p;
set_last_tok: import sh9p;
print_toks: import sh9p;
parse_toks: import sh9p;
reverse_list: import sh9u;
to_array: import sh9u;
S_UNKNOWN: con "UNK";
S_NONE: con "NONE";
S_ID: con "ID";
S_STR: con "STR";
S_EQ: con "EQ";
S_COLON: con "COLON";
S_SEMIC: con "SEMIC";
S_LPAR: con "LPAR";
S_RPAR: con "RPAR";
S_LCURLY: con "LCURLY";
S_RCURLY: con "RCURLY";
S_DQSTR: con "DQSTR";
S_SQSTR: con "SQSTR";
S_DQTE: con "DQTE";
S_SQTE: con "SQTE";
S_SP: con "SP";
S_TAB: con "TAB";
S_DOLL: con "DOLL";
S_EOL: con "EOL";
S_STMT: con "STMT";
S_EXPR: con "EXPR";
S_CALL: con "CALL";
tokenize(line: string, line_n: int): array of ref TokNode {
toks : list of ref TokNode;
last_tok:= ref TokNode;
last_tok.start = -1;
last_tok.line = -1;
last_tok.tok = "";
last_tok.typ = S_UNKNOWN;
k:=0;
for (i := 0; i < len line; i++) {
if (last_tok.typ == S_DQSTR) {
case (line[i:i+1]) {
"\"" => {
l := len last_tok.tok;
if ((last_tok.tok[l-1:] != "\\") || ((last_tok.tok[l-1:] == "\\") && (last_tok.tok[l-2:l-1] == "\\"))) {
# end of str
last_tok.tok = last_tok.tok + line[i:i+1];
(last_tok, toks) = set_last_tok(last_tok, toks);
} else {
# escaped dqte, just continue
last_tok.tok = last_tok.tok + line[i:i+1];
}
};
* => {
last_tok.tok = last_tok.tok + line[i:i+1];
}
}
} else if (last_tok.typ == S_SQSTR) {
case (line[i:i+1]) {
"'" => {
l := len last_tok.tok;
if ((last_tok.tok[l-1:] != "\\") || ((last_tok.tok[l-1:] == "\\") && (last_tok.tok[l-2:l-1] == "\\"))) {
# end of str
last_tok.tok = last_tok.tok + line[i:i+1];
(last_tok, toks) = set_last_tok(last_tok, toks);
} else {
# escaped sqte, just continue
last_tok.tok = last_tok.tok + line[i:i+1];
}
};
* => {
last_tok.tok = last_tok.tok + line[i:i+1];
}
}
} else {
case (line[i:i+1]) {
" " or "\t" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
};
"=" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, "=", S_EQ) :: toks;
};
";" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, ";", S_SEMIC) :: toks;
};
":" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, ":", S_COLON) :: toks;
};
"(" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, "(", S_LPAR) :: toks;
};
")" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, ")", S_RPAR) :: toks;
};
"{" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, "{", S_LCURLY) :: toks;
};
"}" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, "}", S_RCURLY) :: toks;
};
"$" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, "$", S_DOLL) :: toks;
};
"\"" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
last_tok.start = i;
last_tok.line = line_n;
last_tok.typ = S_DQSTR;
last_tok.tok = last_tok.tok + line[i:i+1];
};
"'" => {
(last_tok, toks) = set_last_tok(last_tok, toks);
last_tok.start = i;
last_tok.line = line_n;
last_tok.typ = S_SQSTR;
last_tok.tok = last_tok.tok + line[i:i+1];
};
* => {
if (last_tok.start == -1) {
last_tok.start = i;
last_tok.line = line_n;
last_tok.typ = S_ID;
}
last_tok.tok = last_tok.tok + line[i:i+1];
};
}
}
}
(last_tok, toks) = set_last_tok(last_tok, toks);
toks = mk_tok(i, line_n, "", S_EOL) :: toks;
toks = reverse_list(toks);
return to_array(toks);
}
stmt_assign(c: ref ParserCtx, toks: array of ref TokNode): array of ref TokNode {
sys->print("ASSIGN STMT\n");
m:= c.get_current_module();
v:= ref ModVar;
v.name= toks[0].tok;
v.val= toks[2].tok;
m.set_var(v);
return array[0] of ref TokNode;
}
stmt_cmd_call(c: ref ParserCtx, toks: array of ref TokNode): array of ref TokNode {
sys->print("CMD CALL\n");
return array[0] of ref TokNode;
}
sqstr_to_expr(c: ref ParserCtx, toks: array of ref TokNode): array of ref TokNode {
tn:= mk_tok(toks[0].start, toks[0].line, toks[0].tok, S_EXPR);
return array[1] of {tn};
}
empty(c: ref ParserCtx, toks: array of ref TokNode): array of ref TokNode {
return array[0] of ref TokNode;
}
var_sub_expr(c: ref ParserCtx, toks: array of ref TokNode): array of ref TokNode {
sys->print("VAR SUB\n");
varname:=toks[1].tok;
if (varname == "{") {
varname = toks[2].tok;
}
v:= c.find_var_in_current_module(varname);
if (v == nil) {
sys->print("Var %s is nil\nAll vars:\n", varname);
c.print_all_vars();
}
sys->print("VAR %s SUB: %s\n", v.name, v.val);
tn:= mk_tok(toks[0].start, toks[0].line, v.val, S_EXPR);
return array[1] of {tn};
}
expr_expr_combiner(c: ref ParserCtx, toks: array of ref TokNode): array of ref TokNode {
comb_tok:= toks[0].tok + " " + toks[1].tok;
tn:= mk_tok(toks[0].start, toks[0].line, comb_tok, S_EXPR);
return array[1] of {tn};
}
mk_grammar(ctx: ref ParserCtx): array of ref GrammarNode
{
semic_eol_g : GrammarNode = (array [] of {S_SEMIC, S_EOL}, S_EOL, empty, ctx);
assign_g_semic : GrammarNode = (array [] of {S_ID, S_EQ, S_EXPR, S_SEMIC}, S_NONE, stmt_assign, ctx);
assign_g_eol : GrammarNode = (array [] of {S_ID, S_EQ, S_EXPR, S_EOL}, S_NONE, stmt_assign, ctx);
sqstr_expr_g: GrammarNode = (array [] of {S_SQSTR}, nil, sqstr_to_expr, ctx);
str_expr_g: GrammarNode = (array [] of {S_STR}, S_EXPR, empty, ctx);
expr_combinator_g: GrammarNode = (array [] of {S_EXPR, S_EXPR}, nil, expr_expr_combiner, ctx);
cmd_call_semic_g: GrammarNode = (array [] of {S_ID, S_EXPR, S_SEMIC}, nil, stmt_cmd_call, ctx);
cmd_call_eol_g: GrammarNode = (array [] of {S_ID, S_EXPR, S_EOL}, nil, stmt_cmd_call, ctx);
var_sub_g: GrammarNode = (array [] of {S_DOLL, S_ID}, nil, var_sub_expr, ctx);
var_sub_curl_g: GrammarNode = (array [] of {S_DOLL, S_LCURLY, S_ID, S_RCURLY}, nil, var_sub_expr, ctx);
dqstr_expr_g: GrammarNode = (array [] of {S_DQTE, S_EXPR, S_DQTE}, nil, empty, ctx);
grammar: array of ref GrammarNode;
grammar = array [] of {
ref semic_eol_g,
ref assign_g_semic,
ref assign_g_eol,
ref sqstr_expr_g,
ref str_expr_g,
ref cmd_call_semic_g,
ref cmd_call_eol_g,
ref expr_combinator_g,
ref var_sub_g,
ref var_sub_curl_g,
};
return grammar;
}
init(ctxt: ref Draw->Context, argv: list of string) {
sys = load Sys Sys->PATH;
sh9u = load Sh9Util Sh9Util->PATH;
sh9p = load Sh9Parser Sh9Parser->PATH;
sh9p->init();
pctx:= ref ParserCtx;
pctx.add_module("shell");
toks1 := tokenize("AB = 'smth \"test\" '; echo ${AB}; echo $AB", 0);
#print_toks(toks1);
#sys->print("Parse\n");
grammar:= mk_grammar(pctx);
parse_toks(toks1, grammar);
#sys->print("Parse done\n");
# toks2 := tokenize("echo \"smth \" \"test\";", 0);
# print_toks(toks2);
# toks3 := tokenize("if test x\"a\" = x\"b\"; then echo \"1\"; fi", 0);
# print_toks(toks3);
# toks4 := tokenize("echo 'smth2' 'test';", 0);
# print_toks(toks4);
}
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