80 lines
1.6 KiB
C++
80 lines
1.6 KiB
C++
#include "io.h"
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#include "parser.h"
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#include <stdlib.h>
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#ifdef __linux__
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#include "linux.h"
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#endif // __linux__
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static char ok[] = "ok.\n";
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static char bye[] = "bye";
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static bool
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parser(IO &interface, const char *buf, const size_t buflen)
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{
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static size_t offset = 0;
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static struct Token token;
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static PARSE_RESULT result = PARSE_FAIL;
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offset = 0;
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// reset token
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token.token = nullptr;
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token.length = 0;
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while ((result = parse_next(buf, buflen, &offset, &token)) == PARSE_OK) {
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interface.wrbuf((char *)"token: ", 7);
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interface.wrbuf(token.token, token.length);
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interface.wrln((char *)".", 1);
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// Temporary hack until the interpreter is working further.
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if (match_token(token.token, token.length, bye, 3)) {
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interface.wrln((char *)"Goodbye!", 8);
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exit(0);
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}
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}
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switch (result) {
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case PARSE_EOB:
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interface.wrbuf(ok, 4);
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return true;
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case PARSE_LEN:
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interface.wrln((char *)"parse error: token too long", 27);
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return false;
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case PARSE_FAIL:
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interface.wrln((char *)"parser failure", 14);
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return false;
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default:
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interface.wrln((char *)"*** the world is broken ***", 27);
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exit(1);
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}
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}
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static void
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interpreter(IO &interface)
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{
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static size_t buflen = 0;
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static char linebuf[81];
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while (true) {
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interface.wrch('?');
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interface.wrch(' ');
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buflen = interface.rdbuf(linebuf, 80, true, '\n');
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parser(interface, linebuf, buflen);
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}
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}
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static char banner[] = "kforth interpreter\n";
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const size_t bannerlen = 19;
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int
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main(void)
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{
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#ifdef __linux__
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Console interface;
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#endif
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interface.wrbuf(banner, bannerlen);
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interpreter(interface);
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return 0;
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} |