forked from OctaForge/libcubescript
1506 lines
52 KiB
C++
1506 lines
52 KiB
C++
#include <cubescript/cubescript.hh>
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#include "cs_vm.hh"
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#include "cs_util.hh"
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#include <ctype.h>
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#include <limits>
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namespace cscript {
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ostd::string_range cs_gen_state::get_str() {
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size_t nl;
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ostd::string_range beg = source;
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source = util::parse_string(cs, source, nl);
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current_line += nl - 1;
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ostd::string_range ret = beg.slice(0, &source[0] - &beg[0]);
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return ret.slice(1, ret.size() - 1);
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}
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cs_string cs_gen_state::get_str_dup(bool unescape) {
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auto str = get_str();
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auto app = ostd::appender<cs_string>();
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if (unescape) {
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util::unescape_string(app, str);
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} else {
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app.get() = str;
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}
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return std::move(app.get());
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}
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ostd::string_range cs_gen_state::read_macro_name() {
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auto op = source;
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char c = current();
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if (!isalpha(c) && (c != '_')) {
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return nullptr;
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}
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for (; isalnum(c) || (c == '_'); c = current()) {
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next_char();
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}
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return op.slice(0, &source[0] - &op[0]);
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}
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char cs_gen_state::skip_until(ostd::string_range chars) {
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char c = current();
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while (c && ostd::find(chars, c).empty()) {
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next_char();
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c = current();
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}
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return c;
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}
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char cs_gen_state::skip_until(char cf) {
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char c = current();
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while (c && (c != cf)) {
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next_char();
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c = current();
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}
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return c;
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}
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static bool cs_is_hspace(char c) {
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return (c == ' ') || (c == '\t') || (c == '\r');
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}
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void cs_gen_state::skip_comments() {
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for (;;) {
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for (char c = current(); cs_is_hspace(c); c = current()) {
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next_char();
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}
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if (current() == '\\') {
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char c = current(1);
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if ((c != '\r') && (c != '\n')) {
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throw cs_error(cs, "invalid line break");
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}
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/* skip backslash */
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next_char();
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/* skip CR or LF */
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next_char();
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/* when CR, try also skipping LF; covers \r, \n, \r\n */
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if ((c == '\r') && (current(1) == '\n')) {
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next_char();
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}
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/* skip whitespace on new line */
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continue;
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}
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if ((current() != '/') || (current(1) != '/')) {
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return;
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}
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while (current() != '\n') {
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next_char();
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}
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}
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}
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ostd::string_range cs_gen_state::get_word() {
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auto beg = source;
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source = util::parse_word(cs, source);
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return beg.slice(0, &source[0] - &beg[0]);
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}
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static inline int cs_ret_code(int type, int def = 0) {
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if (type >= CsValAny) {
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return (type == CsValCstring) ? CsRetString : def;
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}
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return type << CsCodeRet;
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}
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static void compilestatements(
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cs_gen_state &gs, int rettype, int brak = '\0', int prevargs = 0
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);
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static inline std::pair<ostd::string_range, size_t> compileblock(
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cs_gen_state &gs, ostd::string_range p, size_t line,
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int rettype = CsRetNull, int brak = '\0'
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);
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void cs_gen_state::gen_int(ostd::string_range word) {
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gen_int(cs_parse_int(word));
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}
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void cs_gen_state::gen_float(ostd::string_range word) {
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gen_float(cs_parse_float(word));
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}
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void cs_gen_state::gen_value(int wordtype, ostd::string_range word, int line) {
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switch (wordtype) {
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case CsValCany:
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if (!word.empty()) {
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gen_str(word, true);
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} else {
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gen_null();
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}
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break;
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case CsValCstring:
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gen_str(word, true);
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break;
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case CsValAny:
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if (!word.empty()) {
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gen_str(word);
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} else {
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gen_null();
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}
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break;
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case CsValString:
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gen_str(word);
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break;
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case CsValFloat:
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gen_float(word);
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break;
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case CsValInt:
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gen_int(word);
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break;
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case CsValCond:
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if (!word.empty()) {
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compileblock(*this, word, line);
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} else {
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gen_null();
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}
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break;
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case CsValCode:
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compileblock(*this, word, line);
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break;
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case CsValIdent:
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gen_ident(word);
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break;
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default:
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break;
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}
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}
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static inline void compileblock(cs_gen_state &gs) {
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gs.code.push_back(CsCodeEmpty);
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}
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static inline std::pair<ostd::string_range, size_t> compileblock(
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cs_gen_state &gs, ostd::string_range p, size_t line, int rettype, int brak
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) {
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size_t start = gs.code.size();
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gs.code.push_back(CsCodeBlock);
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gs.code.push_back(CsCodeOffset | ((start + 2) << 8));
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size_t retline = line;
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if (p) {
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ostd::string_range op = gs.source;
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size_t oldline = gs.current_line;
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gs.source = p;
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gs.current_line = line;
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compilestatements(gs, CsValAny, brak);
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p = gs.source;
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retline = gs.current_line;
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gs.source = op;
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gs.current_line = oldline;
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}
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if (gs.code.size() > start + 2) {
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gs.code.push_back(CsCodeExit | rettype);
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gs.code[start] |= uint32_t(gs.code.size() - (start + 1)) << 8;
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} else {
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gs.code.resize(start);
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gs.code.push_back(CsCodeEmpty | rettype);
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}
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return std::make_pair(p, retline);
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}
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static inline void compileunescapestr(cs_gen_state &gs, bool macro = false) {
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auto str = gs.get_str();
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gs.code.push_back(macro ? CsCodeMacro : (CsCodeVal | CsRetString));
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gs.code.reserve(
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gs.code.size() + str.size() / sizeof(uint32_t) + 1
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);
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size_t bufs = (gs.code.capacity() - gs.code.size()) * sizeof(uint32_t);
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char *buf = new char[bufs + 1];
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auto writer = ostd::char_range(buf, buf + bufs);
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size_t len = util::unescape_string(ostd::counting_sink(writer), str).get_written();
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memset(&buf[len], 0, sizeof(uint32_t) - len % sizeof(uint32_t));
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gs.code.back() |= len << 8;
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uint32_t *ubuf = reinterpret_cast<uint32_t *>(buf);
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gs.code.insert(gs.code.end(), ubuf, ubuf + (len / sizeof(uint32_t) + 1));
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delete[] buf;
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}
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static bool compilearg(
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cs_gen_state &gs, int wordtype, int prevargs = MaxResults,
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cs_string *word = nullptr
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);
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static void compilelookup(cs_gen_state &gs, int ltype, int prevargs = MaxResults) {
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cs_string lookup;
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gs.next_char();
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switch (gs.current()) {
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case '(':
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case '[':
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if (!compilearg(gs, CsValCstring, prevargs)) {
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goto invalid;
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}
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break;
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case '$':
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compilelookup(gs, CsValCstring, prevargs);
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break;
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case '\"':
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lookup = gs.get_str_dup();
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goto lookupid;
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default: {
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lookup = gs.get_word();
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if (lookup.empty()) goto invalid;
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lookupid:
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cs_ident *id = gs.cs.new_ident(lookup);
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if (id) {
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switch (id->get_type()) {
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case cs_ident_type::Ivar:
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gs.code.push_back(
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CsCodeIvar | cs_ret_code(ltype, CsRetInt) |
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(id->get_index() << 8)
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);
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switch (ltype) {
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case CsValPop:
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gs.code.pop_back();
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break;
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case CsValCode:
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gs.code.push_back(CsCodeCompile);
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break;
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case CsValIdent:
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gs.code.push_back(CsCodeIdentU);
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break;
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}
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return;
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case cs_ident_type::Fvar:
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gs.code.push_back(
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CsCodeFvar | cs_ret_code(ltype, CsRetFloat) |
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(id->get_index() << 8)
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);
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switch (ltype) {
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case CsValPop:
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gs.code.pop_back();
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break;
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case CsValCode:
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gs.code.push_back(CsCodeCompile);
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break;
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case CsValIdent:
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gs.code.push_back(CsCodeIdentU);
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break;
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}
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return;
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case cs_ident_type::Svar:
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switch (ltype) {
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case CsValPop:
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return;
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case CsValCany:
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case CsValCstring:
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case CsValCode:
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case CsValIdent:
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case CsValCond:
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gs.code.push_back(
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CsCodeSvarM | (id->get_index() << 8)
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);
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break;
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default:
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gs.code.push_back(
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CsCodeSvar | cs_ret_code(ltype, CsRetString) |
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(id->get_index() << 8)
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);
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break;
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}
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goto done;
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case cs_ident_type::Alias:
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switch (ltype) {
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case CsValPop:
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return;
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case CsValCany:
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case CsValCond:
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gs.code.push_back(
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(id->get_index() < MaxArguments
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? CsCodeLookupMarg
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: CsCodeLookupM
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) | (id->get_index() << 8)
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);
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break;
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case CsValCstring:
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case CsValCode:
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case CsValIdent:
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gs.code.push_back(
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(id->get_index() < MaxArguments
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? CsCodeLookupMarg
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: CsCodeLookupM
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) | CsRetString | (id->get_index() << 8)
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);
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break;
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default:
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gs.code.push_back(
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(id->get_index() < MaxArguments
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? CsCodeLookupArg
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: CsCodeLookup
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) | cs_ret_code(ltype, CsRetString) |
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(id->get_index() << 8)
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);
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break;
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}
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goto done;
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case cs_ident_type::Command: {
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int comtype = CsCodeCom, numargs = 0;
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if (prevargs >= MaxResults) {
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gs.code.push_back(CsCodeEnter);
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}
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auto fmt = static_cast<cs_command *>(id)->get_args();
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for (char c: fmt) {
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switch (c) {
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case 'S':
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gs.gen_str();
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numargs++;
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break;
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case 's':
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gs.gen_str(ostd::string_range(), true);
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numargs++;
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break;
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case 'i':
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gs.gen_int();
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numargs++;
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break;
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case 'b':
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gs.gen_int(std::numeric_limits<cs_int>::min());
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numargs++;
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break;
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case 'f':
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gs.gen_float();
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numargs++;
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break;
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case 'F':
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gs.code.push_back(CsCodeDup | CsRetFloat);
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numargs++;
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break;
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case 'E':
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case 'T':
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case 't':
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gs.gen_null();
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numargs++;
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break;
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case 'e':
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compileblock(gs);
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numargs++;
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break;
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case 'r':
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gs.gen_ident();
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numargs++;
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break;
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case '$':
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gs.gen_ident(id);
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numargs++;
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break;
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case 'N':
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gs.gen_int(-1);
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numargs++;
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break;
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case 'C':
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comtype = CsCodeComC;
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goto compilecomv;
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case 'V':
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comtype = CsCodeComV;
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goto compilecomv;
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case '1':
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case '2':
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case '3':
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case '4':
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break;
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}
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}
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gs.code.push_back(
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comtype | cs_ret_code(ltype) | (id->get_index() << 8)
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);
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gs.code.push_back(
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(prevargs >= MaxResults
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? CsCodeExit
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: CsCodeResultArg
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) | cs_ret_code(ltype)
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);
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goto done;
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compilecomv:
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gs.code.push_back(
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comtype | cs_ret_code(ltype) | (numargs << 8) |
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(id->get_index() << 13)
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);
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gs.code.push_back(
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(prevargs >= MaxResults
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? CsCodeExit
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: CsCodeResultArg
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) | cs_ret_code(ltype)
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);
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goto done;
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}
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default:
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goto invalid;
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}
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}
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gs.gen_str(lookup, true);
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break;
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}
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}
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switch (ltype) {
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case CsValCany:
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case CsValCond:
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gs.code.push_back(CsCodeLookupMu);
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break;
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case CsValCstring:
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case CsValCode:
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case CsValIdent:
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gs.code.push_back(CsCodeLookupMu | CsRetString);
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break;
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default:
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gs.code.push_back(CsCodeLookupU | cs_ret_code(ltype));
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break;
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}
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done:
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switch (ltype) {
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case CsValPop:
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gs.code.push_back(CsCodePop);
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break;
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case CsValCode:
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gs.code.push_back(CsCodeCompile);
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break;
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case CsValCond:
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gs.code.push_back(CsCodeCond);
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break;
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case CsValIdent:
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gs.code.push_back(CsCodeIdentU);
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break;
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}
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return;
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invalid:
|
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switch (ltype) {
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case CsValPop:
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break;
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case CsValNull:
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case CsValAny:
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case CsValCany:
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case CsValWord:
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case CsValCond:
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gs.gen_null();
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break;
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default:
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gs.gen_value(ltype);
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break;
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}
|
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}
|
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|
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static bool compileblockstr(cs_gen_state &gs, ostd::string_range str, bool macro) {
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int startc = gs.code.size();
|
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gs.code.push_back(macro ? CsCodeMacro : CsCodeVal | CsRetString);
|
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gs.code.reserve(gs.code.size() + str.size() / sizeof(uint32_t) + 1);
|
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char *buf = new char[(str.size() / sizeof(uint32_t) + 1) * sizeof(uint32_t)];
|
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int len = 0;
|
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while (!str.empty()) {
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char const *p = str.data();
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str = ostd::find_one_of(str, ostd::string_range("\r/\"@]"));
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memcpy(&buf[len], p, str.data() - p);
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len += str.data() - p;
|
|
if (str.empty()) {
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goto done;
|
|
}
|
|
switch (str.front()) {
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case '\r':
|
|
str.pop_front();
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break;
|
|
case '\"': {
|
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auto start = str;
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str = util::parse_string(gs.cs, str);
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auto strr = start.slice(0, &str[0] - &start[0]);
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memcpy(&buf[len], strr.data(), strr.size());
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len += strr.size();
|
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break;
|
|
}
|
|
case '/':
|
|
if (str[1] == '/') {
|
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str = ostd::find(str, '\n');
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} else {
|
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buf[len++] = str.front();
|
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str.pop_front();
|
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}
|
|
break;
|
|
case '@':
|
|
case ']':
|
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buf[len++] = str.front();
|
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str.pop_front();
|
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break;
|
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}
|
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}
|
|
done:
|
|
memset(&buf[len], '\0', sizeof(uint32_t) - len % sizeof(uint32_t));
|
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uint32_t *ubuf = reinterpret_cast<uint32_t *>(buf);
|
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gs.code.insert(gs.code.end(), ubuf, ubuf + (len / sizeof(uint32_t) + 1));
|
|
gs.code[startc] |= len << 8;
|
|
delete[] buf;
|
|
return true;
|
|
}
|
|
|
|
static bool compileblocksub(cs_gen_state &gs, int prevargs) {
|
|
cs_string lookup;
|
|
switch (gs.current()) {
|
|
case '(':
|
|
if (!compilearg(gs, CsValCany, prevargs)) {
|
|
return false;
|
|
}
|
|
break;
|
|
case '[':
|
|
if (!compilearg(gs, CsValCstring, prevargs)) {
|
|
return false;
|
|
}
|
|
gs.code.push_back(CsCodeLookupMu);
|
|
break;
|
|
case '\"':
|
|
lookup = gs.get_str_dup();
|
|
goto lookupid;
|
|
default: {
|
|
lookup = gs.read_macro_name();
|
|
if (lookup.empty()) {
|
|
return false;
|
|
}
|
|
lookupid:
|
|
cs_ident *id = gs.cs.new_ident(lookup);
|
|
if (id) {
|
|
switch (id->get_type()) {
|
|
case cs_ident_type::Ivar:
|
|
gs.code.push_back(CsCodeIvar | (id->get_index() << 8));
|
|
goto done;
|
|
case cs_ident_type::Fvar:
|
|
gs.code.push_back(CsCodeFvar | (id->get_index() << 8));
|
|
goto done;
|
|
case cs_ident_type::Svar:
|
|
gs.code.push_back(CsCodeSvarM | (id->get_index() << 8));
|
|
goto done;
|
|
case cs_ident_type::Alias:
|
|
gs.code.push_back(
|
|
(id->get_index() < MaxArguments
|
|
? CsCodeLookupMarg
|
|
: CsCodeLookupM
|
|
) | (id->get_index() << 8)
|
|
);
|
|
goto done;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
gs.gen_str(lookup, true);
|
|
gs.code.push_back(CsCodeLookupMu);
|
|
done:
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void compileblockmain(cs_gen_state &gs, int wordtype, int prevargs) {
|
|
char const *start = gs.source.data();
|
|
size_t curline = gs.current_line;
|
|
int concs = 0;
|
|
for (int brak = 1; brak;) {
|
|
switch (gs.skip_until("@\"/[]")) {
|
|
case '\0':
|
|
throw cs_error(gs.cs, "missing \"]\"");
|
|
return;
|
|
case '\"':
|
|
gs.get_str();
|
|
break;
|
|
case '/':
|
|
gs.next_char();
|
|
if (gs.current() == '/') {
|
|
gs.skip_until('\n');
|
|
}
|
|
break;
|
|
case '[':
|
|
gs.next_char();
|
|
brak++;
|
|
break;
|
|
case ']':
|
|
gs.next_char();
|
|
brak--;
|
|
break;
|
|
case '@': {
|
|
char const *esc = gs.source.data();
|
|
int level = 0;
|
|
while (gs.current() == '@') {
|
|
++level;
|
|
gs.next_char();
|
|
}
|
|
if (brak > level) {
|
|
continue;
|
|
} else if (brak < level) {
|
|
throw cs_error(gs.cs, "too many @s");
|
|
return;
|
|
}
|
|
if (!concs && prevargs >= MaxResults) {
|
|
gs.code.push_back(CsCodeEnter);
|
|
}
|
|
if (concs + 2 > MaxArguments) {
|
|
gs.code.push_back(CsCodeConcW | CsRetString | (concs << 8));
|
|
concs = 1;
|
|
}
|
|
if (compileblockstr(
|
|
gs, ostd::string_range(start, esc), true
|
|
)) {
|
|
concs++;
|
|
}
|
|
if (compileblocksub(gs, prevargs + concs)) {
|
|
concs++;
|
|
}
|
|
if (concs) {
|
|
start = gs.source.data();
|
|
curline = gs.current_line;
|
|
} else if (prevargs >= MaxResults) {
|
|
gs.code.pop_back();
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
gs.next_char();
|
|
break;
|
|
}
|
|
}
|
|
if (gs.source.data() - 1 > start) {
|
|
if (!concs) {
|
|
switch (wordtype) {
|
|
case CsValPop:
|
|
return;
|
|
case CsValCode:
|
|
case CsValCond: {
|
|
auto ret = compileblock(gs, ostd::string_range(
|
|
start, gs.source.data() + gs.source.size()
|
|
), curline, CsRetNull, ']');
|
|
gs.source = ret.first;
|
|
gs.current_line = ret.second;
|
|
return;
|
|
}
|
|
case CsValIdent:
|
|
gs.gen_ident(ostd::string_range(start, gs.source.data() - 1));
|
|
return;
|
|
}
|
|
}
|
|
switch (wordtype) {
|
|
case CsValCstring:
|
|
case CsValCode:
|
|
case CsValIdent:
|
|
case CsValCany:
|
|
case CsValCond:
|
|
compileblockstr(
|
|
gs, ostd::string_range(start, gs.source.data() - 1), true
|
|
);
|
|
break;
|
|
default:
|
|
compileblockstr(
|
|
gs, ostd::string_range(start, gs.source.data() - 1), concs > 0
|
|
);
|
|
break;
|
|
}
|
|
if (concs > 1) {
|
|
concs++;
|
|
}
|
|
}
|
|
if (concs) {
|
|
if (prevargs >= MaxResults) {
|
|
gs.code.push_back(CsCodeConcM | cs_ret_code(wordtype) | (concs << 8));
|
|
gs.code.push_back(CsCodeExit | cs_ret_code(wordtype));
|
|
} else {
|
|
gs.code.push_back(CsCodeConcW | cs_ret_code(wordtype) | (concs << 8));
|
|
}
|
|
}
|
|
switch (wordtype) {
|
|
case CsValPop:
|
|
if (concs || gs.source.data() - 1 > start) {
|
|
gs.code.push_back(CsCodePop);
|
|
}
|
|
break;
|
|
case CsValCond:
|
|
if (!concs && gs.source.data() - 1 <= start) {
|
|
gs.gen_null();
|
|
} else {
|
|
gs.code.push_back(CsCodeCond);
|
|
}
|
|
break;
|
|
case CsValCode:
|
|
if (!concs && gs.source.data() - 1 <= start) {
|
|
compileblock(gs);
|
|
} else {
|
|
gs.code.push_back(CsCodeCompile);
|
|
}
|
|
break;
|
|
case CsValIdent:
|
|
if (!concs && gs.source.data() - 1 <= start) {
|
|
gs.gen_ident();
|
|
} else {
|
|
gs.code.push_back(CsCodeIdentU);
|
|
}
|
|
break;
|
|
case CsValCstring:
|
|
case CsValCany:
|
|
if (!concs && gs.source.data() - 1 <= start) {
|
|
gs.gen_str(ostd::string_range(), true);
|
|
}
|
|
break;
|
|
case CsValString:
|
|
case CsValNull:
|
|
case CsValAny:
|
|
case CsValWord:
|
|
if (!concs && gs.source.data() - 1 <= start) {
|
|
gs.gen_str();
|
|
}
|
|
break;
|
|
default:
|
|
if (!concs) {
|
|
if (gs.source.data() - 1 <= start) {
|
|
gs.gen_value(wordtype);
|
|
} else {
|
|
gs.code.push_back(CsCodeForce | (wordtype << CsCodeRet));
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static bool compilearg(
|
|
cs_gen_state &gs, int wordtype, int prevargs, cs_string *word
|
|
) {
|
|
gs.skip_comments();
|
|
switch (gs.current()) {
|
|
case '\"':
|
|
switch (wordtype) {
|
|
case CsValPop:
|
|
gs.get_str();
|
|
break;
|
|
case CsValCond: {
|
|
size_t line = gs.current_line;
|
|
auto s = gs.get_str_dup();
|
|
if (!s.empty()) {
|
|
compileblock(gs, s, line);
|
|
} else {
|
|
gs.gen_null();
|
|
}
|
|
break;
|
|
}
|
|
case CsValCode: {
|
|
auto s = gs.get_str_dup();
|
|
compileblock(gs);
|
|
break;
|
|
}
|
|
case CsValWord:
|
|
if (word) {
|
|
*word = gs.get_str_dup();
|
|
}
|
|
break;
|
|
case CsValAny:
|
|
case CsValString:
|
|
compileunescapestr(gs);
|
|
break;
|
|
case CsValCany:
|
|
case CsValCstring:
|
|
compileunescapestr(gs, true);
|
|
break;
|
|
default: {
|
|
size_t line = gs.current_line;
|
|
auto s = gs.get_str_dup();
|
|
gs.gen_value(wordtype, s, line);
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
case '$':
|
|
compilelookup(gs, wordtype, prevargs);
|
|
return true;
|
|
case '(':
|
|
gs.next_char();
|
|
if (prevargs >= MaxResults) {
|
|
gs.code.push_back(CsCodeEnter);
|
|
compilestatements(
|
|
gs, wordtype > CsValAny ? CsValCany : CsValAny, ')'
|
|
);
|
|
gs.code.push_back(CsCodeExit | cs_ret_code(wordtype));
|
|
} else {
|
|
size_t start = gs.code.size();
|
|
compilestatements(
|
|
gs, wordtype > CsValAny ? CsValCany : CsValAny, ')', prevargs
|
|
);
|
|
if (gs.code.size() > start) {
|
|
gs.code.push_back(CsCodeResultArg | cs_ret_code(wordtype));
|
|
} else {
|
|
gs.gen_value(wordtype);
|
|
return true;
|
|
}
|
|
}
|
|
switch (wordtype) {
|
|
case CsValPop:
|
|
gs.code.push_back(CsCodePop);
|
|
break;
|
|
case CsValCond:
|
|
gs.code.push_back(CsCodeCond);
|
|
break;
|
|
case CsValCode:
|
|
gs.code.push_back(CsCodeCompile);
|
|
break;
|
|
case CsValIdent:
|
|
gs.code.push_back(CsCodeIdentU);
|
|
break;
|
|
}
|
|
return true;
|
|
case '[':
|
|
gs.next_char();
|
|
compileblockmain(gs, wordtype, prevargs);
|
|
return true;
|
|
default:
|
|
switch (wordtype) {
|
|
case CsValPop: {
|
|
return !gs.get_word().empty();
|
|
}
|
|
case CsValCond: {
|
|
size_t line = gs.current_line;
|
|
auto s = gs.get_word();
|
|
if (s.empty()) {
|
|
return false;
|
|
}
|
|
compileblock(gs, s, line);
|
|
return true;
|
|
}
|
|
case CsValCode: {
|
|
size_t line = gs.current_line;
|
|
auto s = gs.get_word();
|
|
if (s.empty()) {
|
|
return false;
|
|
}
|
|
compileblock(gs, s, line);
|
|
return true;
|
|
}
|
|
case CsValWord: {
|
|
auto w = gs.get_word();
|
|
if (word) {
|
|
*word = w;
|
|
}
|
|
return !w.empty();
|
|
}
|
|
default: {
|
|
size_t line = gs.current_line;
|
|
auto s = gs.get_word();
|
|
if (s.empty()) {
|
|
return false;
|
|
}
|
|
gs.gen_value(wordtype, s, line);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void compile_cmd(
|
|
cs_gen_state &gs, cs_command *id, bool &more, int rettype, int prevargs
|
|
) {
|
|
int comtype = CsCodeCom, numargs = 0, fakeargs = 0;
|
|
bool rep = false;
|
|
auto fmt = id->get_args();
|
|
for (; !fmt.empty(); ++fmt) {
|
|
switch (*fmt) {
|
|
case 'S':
|
|
case 's':
|
|
if (more) {
|
|
more = compilearg(
|
|
gs, *fmt == 's' ? CsValCstring : CsValString,
|
|
prevargs + numargs
|
|
);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_str(ostd::string_range(), *fmt == 's');
|
|
fakeargs++;
|
|
} else if (fmt.size() == 1) {
|
|
int numconc = 1;
|
|
while ((numargs + numconc) < MaxArguments) {
|
|
more = compilearg(
|
|
gs, CsValCstring, prevargs + numargs + numconc
|
|
);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
numconc++;
|
|
}
|
|
if (numconc > 1) {
|
|
gs.code.push_back(CsCodeConc | CsRetString | (numconc << 8));
|
|
}
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'i':
|
|
if (more) {
|
|
more = compilearg(gs, CsValInt, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_int();
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'b':
|
|
if (more) {
|
|
more = compilearg(gs, CsValInt, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_int(std::numeric_limits<cs_int>::min());
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'f':
|
|
if (more) {
|
|
more = compilearg(gs, CsValFloat, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_float();
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'F':
|
|
if (more) {
|
|
more = compilearg(gs, CsValFloat, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.code.push_back(CsCodeDup | CsRetFloat);
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'T':
|
|
case 't':
|
|
if (more) {
|
|
more = compilearg(
|
|
gs, *fmt == 't' ? CsValCany : CsValAny,
|
|
prevargs + numargs
|
|
);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_null();
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'E':
|
|
if (more) {
|
|
more = compilearg(gs, CsValCond, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_null();
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'e':
|
|
if (more) {
|
|
more = compilearg(gs, CsValCode, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
compileblock(gs);
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case 'r':
|
|
if (more) {
|
|
more = compilearg(gs, CsValIdent, prevargs + numargs);
|
|
}
|
|
if (!more) {
|
|
if (rep) {
|
|
break;
|
|
}
|
|
gs.gen_ident();
|
|
fakeargs++;
|
|
}
|
|
numargs++;
|
|
break;
|
|
case '$':
|
|
gs.gen_ident(id);
|
|
numargs++;
|
|
break;
|
|
case 'N':
|
|
gs.gen_int(numargs - fakeargs);
|
|
numargs++;
|
|
break;
|
|
case 'C':
|
|
comtype = CsCodeComC;
|
|
if (more) {
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValCany, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
numargs++;
|
|
}
|
|
}
|
|
goto compilecomv;
|
|
case 'V':
|
|
comtype = CsCodeComV;
|
|
if (more) {
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValCany, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
numargs++;
|
|
}
|
|
}
|
|
goto compilecomv;
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
if (more && (numargs < MaxArguments)) {
|
|
int numrep = -int(*fmt) + '0' - 1;
|
|
fmt = ostd::string_range{&fmt[numrep], &fmt[fmt.size()]};
|
|
rep = true;
|
|
} else {
|
|
while (numargs > MaxArguments) {
|
|
gs.code.push_back(CsCodePop);
|
|
--numargs;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
gs.code.push_back(comtype | cs_ret_code(rettype) | (id->get_index() << 8));
|
|
return;
|
|
compilecomv:
|
|
gs.code.push_back(
|
|
comtype | cs_ret_code(rettype) | (numargs << 8) | (id->get_index() << 13)
|
|
);
|
|
}
|
|
|
|
static void compile_alias(cs_gen_state &gs, cs_alias *id, bool &more, int prevargs) {
|
|
int numargs = 0;
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValAny, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
++numargs;
|
|
}
|
|
gs.code.push_back(
|
|
(id->get_index() < MaxArguments ? CsCodeCallArg : CsCodeCall)
|
|
| (numargs << 8) | (id->get_index() << 13)
|
|
);
|
|
}
|
|
|
|
static void compile_local(cs_gen_state &gs, bool &more, int prevargs) {
|
|
int numargs = 0;
|
|
if (more) {
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValIdent, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
numargs++;
|
|
}
|
|
}
|
|
if (more) {
|
|
while ((more = compilearg(gs, CsValPop)));
|
|
}
|
|
gs.code.push_back(CsCodeLocal | (numargs << 8));
|
|
}
|
|
|
|
static void compile_do(
|
|
cs_gen_state &gs, bool &more, int prevargs, int rettype, int opcode
|
|
) {
|
|
if (more) {
|
|
more = compilearg(gs, CsValCode, prevargs);
|
|
}
|
|
gs.code.push_back((more ? opcode : CsCodeNull) | cs_ret_code(rettype));
|
|
}
|
|
|
|
static void compile_if(
|
|
cs_gen_state &gs, cs_ident *id, bool &more, int prevargs, int rettype
|
|
) {
|
|
if (more) {
|
|
more = compilearg(gs, CsValCany, prevargs);
|
|
}
|
|
if (!more) {
|
|
gs.code.push_back(CsCodeNull | cs_ret_code(rettype));
|
|
} else {
|
|
int start1 = gs.code.size();
|
|
more = compilearg(gs, CsValCode, prevargs + 1);
|
|
if (!more) {
|
|
gs.code.push_back(CsCodePop);
|
|
gs.code.push_back(CsCodeNull | cs_ret_code(rettype));
|
|
} else {
|
|
int start2 = gs.code.size();
|
|
more = compilearg(gs, CsValCode, prevargs + 2);
|
|
uint32_t inst1 = gs.code[start1];
|
|
uint32_t op1 = inst1 & ~CsCodeRetMask;
|
|
uint32_t len1 = start2 - (start1 + 1);
|
|
if (!more) {
|
|
if (op1 == (CsCodeBlock | (len1 << 8))) {
|
|
gs.code[start1] = (len1 << 8) | CsCodeJumpB | CsCodeFlagFalse;
|
|
gs.code[start1 + 1] = CsCodeEnterResult;
|
|
gs.code[start1 + len1] = (
|
|
gs.code[start1 + len1] & ~CsCodeRetMask
|
|
) | cs_ret_code(rettype);
|
|
return;
|
|
}
|
|
compileblock(gs);
|
|
} else {
|
|
uint32_t inst2 = gs.code[start2];
|
|
uint32_t op2 = inst2 & ~CsCodeRetMask;
|
|
uint32_t len2 = gs.code.size() - (start2 + 1);
|
|
if (op2 == (CsCodeBlock | (len2 << 8))) {
|
|
if (op1 == (CsCodeBlock | (len1 << 8))) {
|
|
gs.code[start1] = ((start2 - start1) << 8)
|
|
| CsCodeJumpB | CsCodeFlagFalse;
|
|
gs.code[start1 + 1] = CsCodeEnterResult;
|
|
gs.code[start1 + len1] = (
|
|
gs.code[start1 + len1] & ~CsCodeRetMask
|
|
) | cs_ret_code(rettype);
|
|
gs.code[start2] = (len2 << 8) | CsCodeJump;
|
|
gs.code[start2 + 1] = CsCodeEnterResult;
|
|
gs.code[start2 + len2] = (
|
|
gs.code[start2 + len2] & ~CsCodeRetMask
|
|
) | cs_ret_code(rettype);
|
|
return;
|
|
} else if (op1 == (CsCodeEmpty | (len1 << 8))) {
|
|
gs.code[start1] = CsCodeNull | (inst2 & CsCodeRetMask);
|
|
gs.code[start2] = (len2 << 8) | CsCodeJumpB | CsCodeFlagTrue;
|
|
gs.code[start2 + 1] = CsCodeEnterResult;
|
|
gs.code[start2 + len2] = (
|
|
gs.code[start2 + len2] & ~CsCodeRetMask
|
|
) | cs_ret_code(rettype);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
gs.code.push_back(CsCodeCom | cs_ret_code(rettype) | (id->get_index() << 8));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void compile_and_or(
|
|
cs_gen_state &gs, cs_ident *id, bool &more, int prevargs, int rettype
|
|
) {
|
|
int numargs = 0;
|
|
if (more) {
|
|
more = compilearg(gs, CsValCond, prevargs);
|
|
}
|
|
if (!more) {
|
|
gs.code.push_back(
|
|
((id->get_type_raw() == CsIdAnd) ? CsCodeTrue : CsCodeFalse)
|
|
| cs_ret_code(rettype)
|
|
);
|
|
} else {
|
|
numargs++;
|
|
int start = gs.code.size(), end = start;
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValCond, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
numargs++;
|
|
if ((gs.code[end] & ~CsCodeRetMask) != (
|
|
CsCodeBlock | (uint32_t(gs.code.size() - (end + 1)) << 8)
|
|
)) {
|
|
break;
|
|
}
|
|
end = gs.code.size();
|
|
}
|
|
if (more) {
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValCond, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
numargs++;
|
|
}
|
|
gs.code.push_back(
|
|
CsCodeComV | cs_ret_code(rettype) |
|
|
(numargs << 8) | (id->get_index() << 13)
|
|
);
|
|
} else {
|
|
uint32_t op = (id->get_type_raw() == CsIdAnd)
|
|
? (CsCodeJumpResult | CsCodeFlagFalse)
|
|
: (CsCodeJumpResult | CsCodeFlagTrue);
|
|
gs.code.push_back(op);
|
|
end = gs.code.size();
|
|
while ((start + 1) < end) {
|
|
uint32_t len = gs.code[start] >> 8;
|
|
gs.code[start] = ((end - (start + 1)) << 8) | op;
|
|
gs.code[start + 1] = CsCodeEnter;
|
|
gs.code[start + len] = (
|
|
gs.code[start + len] & ~CsCodeRetMask
|
|
) | cs_ret_code(rettype);
|
|
start += len + 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void compilestatements(cs_gen_state &gs, int rettype, int brak, int prevargs) {
|
|
cs_string idname;
|
|
for (;;) {
|
|
gs.skip_comments();
|
|
idname.clear();
|
|
size_t curline = gs.current_line;
|
|
bool more = compilearg(gs, CsValWord, prevargs, &idname);
|
|
if (!more) {
|
|
goto endstatement;
|
|
}
|
|
gs.skip_comments();
|
|
if (gs.current() == '=') {
|
|
switch (gs.current(1)) {
|
|
case '/':
|
|
if (gs.current(2) != '/') {
|
|
break;
|
|
}
|
|
[[fallthrough]];
|
|
case ';':
|
|
case ' ':
|
|
case '\t':
|
|
case '\r':
|
|
case '\n':
|
|
case '\0':
|
|
gs.next_char();
|
|
if (!idname.empty()) {
|
|
cs_ident *id = gs.cs.new_ident(idname);
|
|
if (id) {
|
|
switch (id->get_type()) {
|
|
case cs_ident_type::Alias:
|
|
more = compilearg(gs, CsValAny, prevargs);
|
|
if (!more) {
|
|
gs.gen_str();
|
|
}
|
|
gs.code.push_back(
|
|
(id->get_index() < MaxArguments
|
|
? CsCodeAliasArg
|
|
: CsCodeAlias
|
|
) | (id->get_index() << 8)
|
|
);
|
|
goto endstatement;
|
|
case cs_ident_type::Ivar:
|
|
more = compilearg(gs, CsValInt, prevargs);
|
|
if (!more) {
|
|
gs.gen_int();
|
|
}
|
|
gs.code.push_back(
|
|
CsCodeIvar1 | (id->get_index() << 8)
|
|
);
|
|
goto endstatement;
|
|
case cs_ident_type::Fvar:
|
|
more = compilearg(gs, CsValFloat, prevargs);
|
|
if (!more) {
|
|
gs.gen_float();
|
|
}
|
|
gs.code.push_back(
|
|
CsCodeFvar1 | (id->get_index() << 8)
|
|
);
|
|
goto endstatement;
|
|
case cs_ident_type::Svar:
|
|
more = compilearg(gs, CsValCstring, prevargs);
|
|
if (!more) {
|
|
gs.gen_str();
|
|
}
|
|
gs.code.push_back(
|
|
CsCodeSvar1 | (id->get_index() << 8)
|
|
);
|
|
goto endstatement;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
gs.gen_str(idname, true);
|
|
}
|
|
more = compilearg(gs, CsValAny);
|
|
if (!more) {
|
|
gs.gen_str();
|
|
}
|
|
gs.code.push_back(CsCodeAliasU);
|
|
goto endstatement;
|
|
}
|
|
}
|
|
if (idname.empty()) {
|
|
noid:
|
|
int numargs = 0;
|
|
while (numargs < MaxArguments) {
|
|
more = compilearg(gs, CsValCany, prevargs + numargs);
|
|
if (!more) {
|
|
break;
|
|
}
|
|
++numargs;
|
|
}
|
|
gs.code.push_back(CsCodeCallU | (numargs << 8));
|
|
} else {
|
|
cs_ident *id = gs.cs.get_ident(idname);
|
|
if (!id) {
|
|
if (!cs_check_num(idname)) {
|
|
gs.gen_str(idname, true);
|
|
goto noid;
|
|
}
|
|
switch (rettype) {
|
|
case CsValAny:
|
|
case CsValCany: {
|
|
ostd::string_range end = idname;
|
|
cs_int val = cs_parse_int(end, &end);
|
|
if (!end.empty()) {
|
|
gs.gen_str(idname, rettype == CsValCany);
|
|
} else {
|
|
gs.gen_int(val);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
gs.gen_value(rettype, idname, curline);
|
|
break;
|
|
}
|
|
gs.code.push_back(CsCodeResult);
|
|
} else {
|
|
switch (id->get_type_raw()) {
|
|
case CsIdAlias:
|
|
compile_alias(
|
|
gs, static_cast<cs_alias *>(id), more, prevargs
|
|
);
|
|
break;
|
|
case CsIdCommand:
|
|
compile_cmd(
|
|
gs, static_cast<cs_command *>(id), more,
|
|
rettype, prevargs
|
|
);
|
|
break;
|
|
case CsIdLocal:
|
|
compile_local(gs, more, prevargs);
|
|
break;
|
|
case CsIdDo:
|
|
compile_do(gs, more, prevargs, rettype, CsCodeDo);
|
|
break;
|
|
case CsIdDoArgs:
|
|
compile_do(gs, more, prevargs, rettype, CsCodeDoArgs);
|
|
break;
|
|
case CsIdIf:
|
|
compile_if(gs, id, more, prevargs, rettype);
|
|
break;
|
|
case CsIdBreak:
|
|
gs.code.push_back(CsCodeBreak | CsCodeFlagFalse);
|
|
break;
|
|
case CsIdContinue:
|
|
gs.code.push_back(CsCodeBreak | CsCodeFlagTrue);
|
|
break;
|
|
case CsIdResult:
|
|
if (more) {
|
|
more = compilearg(gs, CsValAny, prevargs);
|
|
}
|
|
gs.code.push_back(
|
|
(more ? CsCodeResult : CsCodeNull) |
|
|
cs_ret_code(rettype)
|
|
);
|
|
break;
|
|
case CsIdNot:
|
|
if (more) {
|
|
more = compilearg(gs, CsValCany, prevargs);
|
|
}
|
|
gs.code.push_back(
|
|
(more ? CsCodeNot : CsCodeTrue) | cs_ret_code(rettype)
|
|
);
|
|
break;
|
|
case CsIdAnd:
|
|
case CsIdOr:
|
|
compile_and_or(gs, id, more, prevargs, rettype);
|
|
break;
|
|
case CsIdIvar:
|
|
if (!(more = compilearg(gs, CsValInt, prevargs))) {
|
|
gs.code.push_back(CsCodePrint | (id->get_index() << 8));
|
|
} else if (!(id->get_flags() & CS_IDF_HEX) || !(
|
|
more = compilearg(gs, CsValInt, prevargs + 1)
|
|
)) {
|
|
gs.code.push_back(CsCodeIvar1 | (id->get_index() << 8));
|
|
} else if (!(
|
|
more = compilearg(gs, CsValInt, prevargs + 2)
|
|
)) {
|
|
gs.code.push_back(CsCodeIvar2 | (id->get_index() << 8));
|
|
} else {
|
|
gs.code.push_back(CsCodeIvar3 | (id->get_index() << 8));
|
|
}
|
|
break;
|
|
case CsIdFvar:
|
|
if (!(more = compilearg(gs, CsValFloat, prevargs))) {
|
|
gs.code.push_back(CsCodePrint | (id->get_index() << 8));
|
|
} else {
|
|
gs.code.push_back(CsCodeFvar1 | (id->get_index() << 8));
|
|
}
|
|
break;
|
|
case CsIdSvar:
|
|
if (!(more = compilearg(gs, CsValCstring, prevargs))) {
|
|
gs.code.push_back(CsCodePrint | (id->get_index() << 8));
|
|
} else {
|
|
int numargs = 0;
|
|
do {
|
|
++numargs;
|
|
} while (numargs < MaxArguments && (
|
|
more = compilearg(
|
|
gs, CsValCany, prevargs + numargs
|
|
)
|
|
));
|
|
if (numargs > 1) {
|
|
gs.code.push_back(
|
|
CsCodeConc | CsRetString | (numargs << 8)
|
|
);
|
|
}
|
|
gs.code.push_back(CsCodeSvar1 | (id->get_index() << 8));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endstatement:
|
|
if (more) {
|
|
while (compilearg(gs, CsValPop));
|
|
}
|
|
switch (gs.skip_until(")];/\n")) {
|
|
case '\0':
|
|
if (gs.current() != brak) {
|
|
throw cs_error(gs.cs, "missing \"%c\"", char(brak));
|
|
return;
|
|
}
|
|
return;
|
|
case ')':
|
|
case ']':
|
|
if (gs.current() == brak) {
|
|
gs.next_char();
|
|
return;
|
|
}
|
|
throw cs_error(gs.cs, "unexpected \"%c\"", gs.current());
|
|
return;
|
|
case '/':
|
|
gs.next_char();
|
|
if (gs.current() == '/') {
|
|
gs.skip_until('\n');
|
|
}
|
|
goto endstatement;
|
|
default:
|
|
gs.next_char();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void cs_gen_state::gen_main(ostd::string_range s, int ret_type) {
|
|
source = s;
|
|
code.push_back(CsCodeStart);
|
|
compilestatements(*this, CsValAny);
|
|
code.push_back(CsCodeExit | ((ret_type < CsValAny) ? (ret_type << CsCodeRet) : 0));
|
|
}
|
|
|
|
} /* namespace cscript */ |