mirror of https://github.com/janet-lang/janet
114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include "datatypes.h"
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#include "vm.h"
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#include "parse.h"
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#include "compile.h"
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#include "value.h"
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#include "disasm.h"
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void string_put(uint8_t * string) {
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uint32_t i;
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uint32_t len = gst_string_length(string);
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for (i = 0; i < len; ++i)
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fputc(string[i], stdout);
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}
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/* Test c function */
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GstValue print(Gst *vm) {
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uint32_t j, count;
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GstValue nil;
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count = gst_count_args(vm);
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for (j = 0; j < count; ++j) {
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string_put(gst_to_string(vm, gst_arg(vm, j)));
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fputc('\n', stdout);
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}
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nil.type = GST_NIL;
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return nil;
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}
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/* A simple repl for debugging */
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void debugRepl() {
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char buffer[1024] = {0};
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const char * reader = buffer;
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GstValue func;
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Gst vm;
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GstParser p;
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GstCompiler c;
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gst_init(&vm);
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for (;;) {
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/* Reset state */
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gst_parser(&p, &vm);
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/* Get and parse input until we have a full form */
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while (p.status == GST_PARSER_PENDING) {
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/* Get some input if we are done */
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if (*reader == '\0') {
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printf(">> ");
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if (!fgets(buffer, sizeof(buffer), stdin)) {
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return;
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}
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p.index = 0;
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reader = buffer;
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}
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reader += gst_parse_cstring(&p, reader);
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}
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/* Check for parsing errors */
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if (p.error) {
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unsigned i;
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printf("\n");
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printf("%s\n", buffer);
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for (i = 0; i < p.index; ++i) {
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printf(" ");
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}
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printf("^\n");
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printf("\nParse error: %s\n", p.error);
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reader = buffer; /* Flush the input buffer */
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buffer[0] = '\0';
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continue;
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}
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/* Try to compile generated AST */
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gst_compiler(&c, &vm);
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gst_compiler_add_global_cfunction(&c, "print", print);
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func.type = GST_FUNCTION;
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func.data.function = gst_compiler_compile(&c, p.value);
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/* Check for compilation errors */
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if (c.error) {
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printf("Compiler error: %s\n", c.error);
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reader = buffer;
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buffer[0] = 0;
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continue;
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}
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/* Print asm */
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//printf("\n");
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//dasmFunc(stdout, func.data.func);
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//printf("\n");
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/* Execute function */
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gst_load(&vm, func);
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if (gst_start(&vm)) {
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printf("VM error: %s\n", vm.error);
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reader = buffer;
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buffer[0] = 0;
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continue;
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} else {
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string_put(gst_to_string(&vm, vm.ret));
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printf("\n");
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}
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}
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}
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int main() {
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printf("Super cool interpreter v0.0\n");
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debugRepl();
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return 0;
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}
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