mirror of
https://github.com/janet-lang/janet
synced 2024-06-30 09:03:15 +00:00
304 lines
10 KiB
C
304 lines
10 KiB
C
/*
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* Copyright (c) 2017 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <gst/gst.h>
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static int client_strequal(const char *a, const char *b) {
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while (*a)
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if (*a++ != *b++) return 0;
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return *a == *b;
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}
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static int client_strequal_witharg(const char *a, const char *b) {
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while (*b)
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if (*a++ != *b++) return 0;
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return *a == '=';
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}
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#define GST_CLIENT_HELP 1
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#define GST_CLIENT_VERBOSE 2
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#define GST_CLIENT_VERSION 4
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#define GST_CLIENT_REPL 8
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#define GST_CLIENT_NOCOLOR 16
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#define GST_CLIENT_UNKNOWN 32
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static void printf_flags(int64_t flags, const char *col, const char *fmt, const char *arg) {
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if (!(flags & GST_CLIENT_NOCOLOR))
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printf("\x1B[%sm", col);
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printf(fmt, arg);
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if (!(flags & GST_CLIENT_NOCOLOR))
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printf("\x1B[0m");
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}
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/* Simple read line functionality */
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static char *gst_getline() {
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char *line = malloc(100);
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char *linep = line;
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size_t lenmax = 100;
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size_t len = lenmax;
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int c;
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if (line == NULL)
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return NULL;
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for (;;) {
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c = fgetc(stdin);
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if (c == EOF)
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break;
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if (--len == 0) {
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len = lenmax;
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char *linen = realloc(linep, lenmax *= 2);
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if (linen == NULL) {
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free(linep);
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return NULL;
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}
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line = linen + (line - linep);
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linep = linen;
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}
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if ((*line++ = c) == '\n')
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break;
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}
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*line = '\0';
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return linep;
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}
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/* Compile and run an ast */
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static int debug_compile_and_run(Gst *vm, GstValue ast, int64_t flags) {
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GstCompiler c;
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GstValue func;
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/* Try to compile generated AST */
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gst_compiler(&c, vm);
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func = gst_wrap_function(gst_compiler_compile(&c, ast));
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/* Check for compilation errors */
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if (c.error.type != GST_NIL) {
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printf_flags(flags, "31", "compiler error: %s\n", (const char *)gst_to_string(vm, c.error));
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return 1;
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}
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/* Execute function */
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if (gst_run(vm, func)) {
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if (vm->crash) {
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printf_flags(flags, "31", "vm crash: %s\n", vm->crash);
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} else {
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printf_flags(flags, "31", "vm error: %s\n", (const char *)gst_to_string(vm, vm->ret));
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}
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return 1;
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}
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return 0;
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}
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/* Parse a file and execute it */
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static int debug_run(Gst *vm, FILE *in, int64_t flags) {
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char buffer[2048] = {0};
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const char *reader = buffer;
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GstParser p;
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for (;;) {
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/* Init parser */
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gst_parser(&p, vm);
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while (p.status != GST_PARSER_ERROR && p.status != GST_PARSER_FULL) {
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if (*reader == '\0') {
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if (!fgets(buffer, sizeof(buffer), in)) {
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/* Check that parser is complete */
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if (p.status != GST_PARSER_FULL && p.status != GST_PARSER_ROOT) {
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printf_flags(flags, "31", "parse error: unexpected end of source%s\n", "");
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return 1;
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}
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/* Otherwise we finished the file with no problems*/
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return 0;
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}
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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 if file read in correctly */
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if (p.error) {
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printf_flags(flags, "31", "parse error: %s\n", p.error);
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break;
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}
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/* Check that parser is complete */
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if (p.status != GST_PARSER_FULL && p.status != GST_PARSER_ROOT) {
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printf_flags(flags, "31", "parse error: unexpected end of source%s\n", "");
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break;
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}
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if (debug_compile_and_run(vm, gst_parse_consume(&p), flags)) {
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break;
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}
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}
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return 1;
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}
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/* A simple repl */
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static int debug_repl(Gst *vm, uint64_t flags) {
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char *buffer, *reader;
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GstParser p;
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buffer = reader = NULL;
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for (;;) {
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/* Init parser */
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gst_parser(&p, vm);
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while (p.status != GST_PARSER_ERROR && p.status != GST_PARSER_FULL) {
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if (p.status == GST_PARSER_ERROR || p.status == GST_PARSER_FULL)
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break;
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if (!reader || *reader == '\0') {
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printf_flags(flags, "33", "> %s", "");
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if (buffer)
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free(buffer);
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buffer = gst_getline();
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if (!buffer || *buffer == '\0')
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return 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 if file read in correctly */
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if (p.error) {
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printf_flags(flags, "31", "parse error: %s\n", p.error);
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buffer = reader = NULL;
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continue;
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}
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/* Check that parser is complete */
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if (p.status != GST_PARSER_FULL && p.status != GST_PARSER_ROOT) {
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printf_flags(flags, "31", "parse error: unexpected end of source%s\n", "");
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continue;
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}
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gst_env_putc(vm, vm->env, "_", vm->ret);
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if (!debug_compile_and_run(vm, gst_parse_consume(&p), flags)) {
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printf_flags(flags, "36", "%s\n", (const char *) gst_description(vm, vm->ret));
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}
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}
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}
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int main(int argc, const char **argv) {
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Gst vm;
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int status = -1;
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int i;
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int fileRead = 0;
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uint32_t memoryInterval = 4096;
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uint64_t flags = 0;
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/* Read the arguments. Ignore files. */
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for (i = 1; i < argc; ++i) {
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const char *arg = argv[i];
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if (*arg == '-') {
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/* Flag or option */
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if (arg[1] == '-') {
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/* Option */
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if (client_strequal(arg + 2, "help")) {
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flags |= GST_CLIENT_HELP;
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} else if (client_strequal(arg + 2, "version")) {
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flags |= GST_CLIENT_VERSION;
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} else if (client_strequal(arg + 2, "verbose")) {
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flags |= GST_CLIENT_VERBOSE;
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} else if (client_strequal(arg + 2, "repl")) {
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flags |= GST_CLIENT_REPL;
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} else if (client_strequal(arg + 2, "nocolor")) {
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flags |= GST_CLIENT_NOCOLOR;
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} else if (client_strequal_witharg(arg + 2, "memchunk")) {
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int64_t val = memoryInterval;
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const uint8_t *end = (const uint8_t *)(arg + 2);
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while (*end) ++end;
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int status = gst_read_integer((const uint8_t *)arg + 11, end, &val);
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if (status) {
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if (val > 0xFFFFFFFF) {
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memoryInterval = 0xFFFFFFFF;
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} else if (val < 0) {
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memoryInterval = 0;
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} else {
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memoryInterval = val;
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}
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}
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} else {
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flags |= GST_CLIENT_UNKNOWN;
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}
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} else {
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/* Flag */
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const char *c = arg;
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while (*(++c)) {
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switch (*c) {
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case 'h':
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flags |= GST_CLIENT_HELP;
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break;
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case 'v':
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flags |= GST_CLIENT_VERSION;
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break;
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case 'V':
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flags |= GST_CLIENT_VERBOSE;
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break;
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case 'r':
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flags |= GST_CLIENT_REPL;
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break;
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case 'c':
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flags |= GST_CLIENT_NOCOLOR;
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break;
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default:
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flags |= GST_CLIENT_UNKNOWN;
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break;
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}
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}
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}
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}
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}
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/* Handle flags and options */
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if ((flags & GST_CLIENT_HELP) || (flags & GST_CLIENT_UNKNOWN)) {
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printf( "Usage:\n"
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"%s -opts --fullopt1 --fullopt2 file1 file2...\n"
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"\n"
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" -h --help : Shows this information.\n"
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" -V --verbose : Show more output.\n"
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" -r --repl : Launch a repl after all files are processed.\n"
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" -c --nocolor : Don't use VT100 color codes in the repl.\n"
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" -v --version : Print the version number and exit.\n"
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" --memchunk=[int] : Set the amount of memory to allocate before\n"
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" forcing a collection in bytes. Max is 2^32-1,\n"
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" min is 0.\n\n",
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argv[0]);
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return 0;
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}
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if (flags & GST_CLIENT_VERSION) {
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printf("%s\n", GST_VERSION);
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return 0;
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}
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/* Set up VM */
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gst_init(&vm);
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vm.memoryInterval = memoryInterval;
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gst_stl_load(&vm);
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/* Read the arguments. Only process files. */
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for (i = 1; i < argc; ++i) {
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const char *arg = argv[i];
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if (*arg != '-') {
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FILE *f;
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f = fopen(arg, "rb");
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fileRead = 1;
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status = debug_run(&vm, f, flags);
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}
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}
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if (!fileRead || (flags & GST_CLIENT_REPL)) {
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status = debug_repl(&vm, flags);
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}
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gst_deinit(&vm);
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return status;
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}
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