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toaruos/apps/kuroko.c

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/**
* Kuroko interpreter main executable.
*
* Reads lines from stdin with the `rline` library and executes them,
* or executes scripts from the argument list.
*/
#define _DEFAULT_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#ifdef __toaru__
#include <toaru/rline.h>
#include <kuroko.h>
#else
#ifndef NO_RLINE
#include "rline.h"
#endif
#include "kuroko.h"
#endif
#include "chunk.h"
#include "debug.h"
#include "vm.h"
#include "memory.h"
#include "scanner.h"
#include "compiler.h"
#include "util.h"
#define PROMPT_MAIN ">>> "
#define PROMPT_BLOCK " > "
static int enableRline = 1;
static int exitRepl = 0;
static int pasteEnabled = 0;
KRK_FUNC(exit,{
FUNCTION_TAKES_NONE();
exitRepl = 1;
})
KRK_FUNC(paste,{
FUNCTION_TAKES_AT_MOST(1);
if (argc) {
CHECK_ARG(0,bool,int,enabled);
pasteEnabled = enabled;
} else {
pasteEnabled = !pasteEnabled;
}
fprintf(stderr, "Pasting is %s.\n", pasteEnabled ? "enabled" : "disabled");
})
static int doRead(char * buf, size_t bufSize) {
#ifndef NO_RLINE
if (enableRline)
return rline(buf, bufSize);
else
#endif
return read(STDIN_FILENO, buf, bufSize);
}
static KrkValue readLine(char * prompt, int promptWidth, char * syntaxHighlighter) {
struct StringBuilder sb = {0};
#ifndef NO_RLINE
if (enableRline) {
rline_exit_string = "";
rline_exp_set_prompts(prompt, "", promptWidth, 0);
rline_exp_set_syntax(syntaxHighlighter);
rline_exp_set_tab_complete_func(NULL);
} else
#endif
{
fprintf(stdout, "%s", prompt);
fflush(stdout);
}
/* Read a line of input using a method that we can guarantee will be
* interrupted by signal delivery. */
while (1) {
char buf[4096];
ssize_t bytesRead = doRead(buf, 4096);
if (krk_currentThread.flags & KRK_THREAD_SIGNALLED) goto _exit;
if (bytesRead < 0) {
krk_runtimeError(vm.exceptions->ioError, "%s", strerror(errno));
goto _exit;
} else if (bytesRead == 0 && !sb.length) {
krk_runtimeError(vm.exceptions->baseException, "EOF");
goto _exit;
} else {
pushStringBuilderStr(&sb, buf, bytesRead);
}
/* Was there a linefeed? Then we can exit. */
if (sb.length && sb.bytes[sb.length-1] == '\n') {
sb.length--;
break;
}
}
return finishStringBuilder(&sb);
_exit:
discardStringBuilder(&sb);
return NONE_VAL();
}
/**
* @brief Read a line of input.
*
* In an interactive session, presents the configured prompt without
* a trailing linefeed.
*/
KRK_FUNC(input,{
FUNCTION_TAKES_AT_MOST(1);
char * prompt = "";
int promptLength = 0;
char * syntaxHighlighter = NULL;
if (argc) {
CHECK_ARG(0,str,KrkString*,_prompt);
prompt = _prompt->chars;
promptLength = _prompt->codesLength;
}
if (hasKw) {
KrkValue promptwidth;
if (krk_tableGet(AS_DICT(argv[argc]), OBJECT_VAL(S("promptwidth")), &promptwidth)) {
if (!IS_INTEGER(promptwidth)) return TYPE_ERROR(int,promptwidth);
promptLength = AS_INTEGER(promptwidth);
}
KrkValue syntax;
if (krk_tableGet(AS_DICT(argv[argc]), OBJECT_VAL(S("syntax")), &syntax)) {
if (!IS_STRING(syntax)) return TYPE_ERROR(str,syntax);
syntaxHighlighter = AS_CSTRING(syntax);
}
}
return readLine(prompt, promptLength, syntaxHighlighter);
})
#ifndef NO_RLINE
/**
* Given an object, find a property with the same name as a scanner token.
* This can be either a field of an instance, or a method of the type of
* the of the object. If we can't find anything by that name, return None.
*
* We can probably also use valueGetProperty which does correct binding
* for native dynamic fields...
*/
static KrkValue findFromProperty(KrkValue current, KrkToken next) {
KrkValue value;
KrkValue member = OBJECT_VAL(krk_copyString(next.start, next.literalWidth));
krk_push(member);
if (IS_INSTANCE(current)) {
/* try fields */
if (krk_tableGet(&AS_INSTANCE(current)->fields, member, &value)) goto _found;
if (krk_tableGet(&AS_INSTANCE(current)->_class->methods, member, &value)) goto _found;
} else {
/* try methods */
KrkClass * _class = krk_getType(current);
if (krk_tableGet(&_class->methods, member, &value)) goto _found;
}
krk_pop();
return NONE_VAL();
_found:
krk_pop();
return value;
}
static void tab_complete_func(rline_context_t * c) {
/* Figure out where the cursor is and if we should be completing anything. */
if (c->offset) {
/* Copy up to the cursor... */
char * tmp = malloc(c->offset + 1);
memcpy(tmp, c->buffer, c->offset);
tmp[c->offset] = '\0';
/* and pass it to the scanner... */
krk_initScanner(tmp);
/* Logically, there can be at most (offset) tokens, plus some wiggle room. */
KrkToken * space = malloc(sizeof(KrkToken) * (c->offset + 2));
int count = 0;
do {
space[count++] = krk_scanToken();
} while (space[count-1].type != TOKEN_EOF && space[count-1].type != TOKEN_ERROR);
/* If count == 1, it was EOF or an error and we have nothing to complete. */
if (count == 1) {
goto _cleanup;
}
/* Otherwise we want to see if we're on an identifier or a dot. */
int base = 2;
int n = base;
if (space[count-base].type == TOKEN_DOT) {
/* Dots we need to look back at the previous tokens for */
n--;
base--;
} else if (space[count-base].type >= TOKEN_IDENTIFIER && space[count-base].type <= TOKEN_WITH) {
/* Something alphanumeric; only for the last element */
} else {
/* Some other symbol */
goto _cleanup;
}
/* Work backwards to find the start of this chain of identifiers */
while (n < count) {
if (space[count-n-1].type != TOKEN_DOT) break;
n++;
if (n == count) break;
if (space[count-n-1].type != TOKEN_IDENTIFIER) break;
n++;
}
if (n <= count) {
/* Now work forwards, starting from the current globals. */
KrkValue root = OBJECT_VAL(krk_currentThread.module);
int isGlobal = 1;
while (n > base) {
/* And look at the potential fields for instances/classes */
KrkValue next = findFromProperty(root, space[count-n]);
if (IS_NONE(next)) {
/* If we hit None, we found something invalid (or literally hit a None
* object, but really the difference is minimal in this case: Nothing
* useful to tab complete from here. */
goto _cleanup;
}
isGlobal = 0;
root = next;
n -= 2; /* To skip every other dot. */
}
/* Now figure out what we're completing - did we already have a partial symbol name? */
int length = (space[count-base].type == TOKEN_DOT) ? 0 : (space[count-base].length);
isGlobal = isGlobal && (length != 0);
/* Collect up to 256 of those that match */
char * matches[256];
int matchCount = 0;
/* Take the last symbol name from the chain and get its member list from dir() */
for (;;) {
KrkValue dirList = krk_dirObject(1,(KrkValue[]){root},0);
krk_push(dirList);
if (!IS_INSTANCE(dirList)) {
fprintf(stderr,"\nInternal error while tab completting.\n");
goto _cleanup;
}
for (size_t i = 0; i < AS_LIST(dirList)->count; ++i) {
KrkString * s = AS_STRING(AS_LIST(dirList)->values[i]);
krk_push(OBJECT_VAL(s));
KrkToken asToken = {.start = s->chars, .literalWidth = s->length};
KrkValue thisValue = findFromProperty(root, asToken);
krk_push(thisValue);
if (IS_CLOSURE(thisValue) || IS_BOUND_METHOD(thisValue) ||
(IS_NATIVE(thisValue) && ((KrkNative*)AS_OBJECT(thisValue))->isMethod != 2)) {
size_t allocSize = s->length + 2;
char * tmp = malloc(allocSize);
size_t len = snprintf(tmp, allocSize, "%s(", s->chars);
s = krk_takeString(tmp, len);
krk_pop();
krk_push(OBJECT_VAL(s));
}
/* If this symbol is shorter than the current submatch, skip it. */
if (length && (int)s->length < length) continue;
/* See if it's already in the matches */
int found = 0;
for (int i = 0; i < matchCount; ++i) {
if (!strcmp(matches[i], s->chars)) {
found = 1;
break;
}
}
if (found) continue;
if (!memcmp(s->chars, space[count-base].start, length)) {
matches[matchCount] = s->chars;
matchCount++;
if (matchCount == 255) goto _toomany;
}
}
/*
* If the object we were scanning was the current module,
* then we should also throw the builtins into the ring.
*/
if (isGlobal && AS_OBJECT(root) == (KrkObj*)krk_currentThread.module) {
root = OBJECT_VAL(vm.builtins);
continue;
} else if (isGlobal && AS_OBJECT(root) == (KrkObj*)vm.builtins) {
extern char * syn_krk_keywords[];
KrkInstance * fakeKeywordsObject = krk_newInstance(vm.baseClasses->objectClass);
root = OBJECT_VAL(fakeKeywordsObject);
krk_push(root);
for (char ** keyword = syn_krk_keywords; *keyword; keyword++) {
krk_attachNamedValue(&fakeKeywordsObject->fields, *keyword, NONE_VAL());
}
continue;
} else {
break;
}
}
_toomany:
/* Now we can do things with the matches. */
if (matchCount == 1) {
/* If there was only one, just fill it. */
rline_insert(c, matches[0] + length);
rline_place_cursor();
} else if (matchCount) {
/* Otherwise, try to find a common substring among them... */
int j = length;
while (1) {
char m = matches[0][j];
if (!m) break;
int diff = 0;
for (int i = 1; i < matchCount; ++i) {
if (matches[i][j] != m) {
diff = 1;
break;
}
}
if (diff) break;
j++;
}
/* If no common sub string could be filled in, we print the list. */
if (j == length) {
/* First find the maximum width of an entry */
int maxWidth = 0;
for (int i = 0; i < matchCount; ++i) {
if ((int)strlen(matches[i]) > maxWidth) maxWidth = strlen(matches[i]);
}
/* Now how many can we fit in a screen */
int colsPerLine = rline_terminal_width / (maxWidth + 2); /* +2 for the spaces */
fprintf(stderr, "\n");
int column = 0;
for (int i = 0; i < matchCount; ++i) {
fprintf(stderr, "%-*s ", maxWidth, matches[i]);
column += 1;
if (column >= colsPerLine) {
fprintf(stderr, "\n");
column = 0;
}
}
if (column != 0) fprintf(stderr, "\n");
} else {
/* If we do have a common sub string, fill in those characters. */
for (int i = length; i < j; ++i) {
char tmp[2] = {matches[0][i], '\0'};
rline_insert(c, tmp);
}
}
}
}
_cleanup:
free(tmp);
free(space);
krk_resetStack();
return;
}
}
#endif
static char * lastDebugCommand = NULL;
static int debuggerHook(KrkCallFrame * frame) {
/* File information */
fprintf(stderr, "At offset 0x%04lx of function '%s' from '%s' on line %lu:\n",
(unsigned long)(frame->ip - frame->closure->function->chunk.code),
frame->closure->function->name->chars,
frame->closure->function->chunk.filename->chars,
(unsigned long)krk_lineNumber(&frame->closure->function->chunk,
(unsigned long)(frame->ip - frame->closure->function->chunk.code)));
/* Opcode trace */
krk_disassembleInstruction(
stderr,
frame->closure->function,
(size_t)(frame->ip - frame->closure->function->chunk.code));
krk_debug_dumpStack(stderr, frame);
while (1) {
char buf[4096] = {0};
#ifndef NO_RLINE
if (enableRline) {
rline_exit_string="";
rline_exp_set_prompts("(dbg) ", "", 6, 0);
rline_exp_set_syntax("krk-dbg");
rline_exp_set_tab_complete_func(NULL);
if (rline(buf, 4096) == 0) goto _dbgQuit;
} else {
#endif
fprintf(stderr, "(dbg) ");
fflush(stderr);
char * out = fgets(buf, 4096, stdin);
if (!out || !strlen(buf)) {
fprintf(stdout, "^D\n");
goto _dbgQuit;
}
#ifndef NO_RLINE
}
#endif
char * nl = strstr(buf,"\n");
if (nl) *nl = '\0';
if (!strlen(buf)) {
if (lastDebugCommand) {
strcpy(buf, lastDebugCommand);
} else {
continue;
}
} else {
#ifndef NO_RLINE
if (enableRline) rline_history_insert(strdup(buf));
#endif
if (lastDebugCommand) free(lastDebugCommand);
lastDebugCommand = strdup(buf);
}
/* Try to tokenize the first bit */
char * arg = NULL;
char * sp = strstr(buf," ");
if (sp) {
*sp = '\0';
arg = sp + 1;
}
/* Now check commands */
if (!strcmp(buf, "c") || !strcmp(buf,"continue")) {
return KRK_DEBUGGER_CONTINUE;
} else if (!strcmp(buf, "s") || !strcmp(buf, "step")) {
return KRK_DEBUGGER_STEP;
} else if (!strcmp(buf, "abort")) {
return KRK_DEBUGGER_ABORT;
} else if (!strcmp(buf, "q") || !strcmp(buf, "quit")) {
return KRK_DEBUGGER_QUIT;
} else if (!strcmp(buf, "bt") || !strcmp(buf, "backtrace")) {
krk_debug_dumpTraceback();
} else if (!strcmp(buf, "p") || !strcmp(buf, "print")) {
if (!arg) {
fprintf(stderr, "print requires an argument\n");
} else {
size_t frameCount = krk_currentThread.frameCount;
/* Compile statement */
KrkCodeObject * expression = krk_compile(arg,"<debugger>");
if (expression) {
/* Make sure stepping is disabled first. */
krk_debug_disableSingleStep();
/* Turn our compiled expression into a callable. */
krk_push(OBJECT_VAL(expression));
krk_push(OBJECT_VAL(krk_newClosure(expression)));
/* Stack silliness, don't ask. */
krk_push(NONE_VAL());
krk_pop();
/* Call the compiled expression with no args, but claim 2 method extras. */
krk_push(krk_callSimple(krk_peek(0), 0, 2));
fprintf(stderr, "\033[1;30m=> ");
krk_printValue(stderr, krk_peek(0));
fprintf(stderr, "\033[0m\n");
krk_pop();
}
if (krk_currentThread.flags & KRK_THREAD_HAS_EXCEPTION) {
krk_dumpTraceback();
krk_currentThread.flags &= ~(KRK_THREAD_HAS_EXCEPTION);
}
krk_currentThread.frameCount = frameCount;
}
} else if (!strcmp(buf, "break") || !strcmp(buf, "b")) {
char * filename = arg;
if (!filename) {
fprintf(stderr, "usage: break FILE LINE [type]\n");
continue;
}
char * lineno = strstr(filename, " ");
if (!lineno) {
fprintf(stderr, "usage: break FILE LINE [type]\n");
continue;
}
/* Advance whitespace */
*lineno = '\0';
lineno++;
/* collect optional type */
int flags = KRK_BREAKPOINT_NORMAL;
char * type = strstr(lineno, " ");
if (type) {
*type = '\0'; type++;
if (!strcmp(type, "repeat") || !strcmp(type,"r")) {
flags = KRK_BREAKPOINT_REPEAT;
} else if (!strcmp(type, "once") || !strcmp(type,"o")) {
flags = KRK_BREAKPOINT_ONCE;
} else {
fprintf(stderr, "Unrecognized breakpoint type: %s\n", type);
continue;
}
}
int lineInt = atoi(lineno);
int result = krk_debug_addBreakpointFileLine(krk_copyString(filename, strlen(filename)), lineInt, flags);
if (result == -1) {
fprintf(stderr, "Sorry, couldn't add breakpoint.\n");
} else {
fprintf(stderr, "Breakpoint %d enabled.\n", result);
}
} else if (!strcmp(buf, "i") || !strcmp(buf, "info")) {
if (!arg) {
fprintf(stderr, " info breakpoints - Show breakpoints.\n");
continue;
}
if (!strcmp(arg,"breakpoints")) {
KrkCodeObject * codeObject = NULL;
size_t offset = 0;
int flags = 0;
int enabled = 0;
int breakIndex = 0;
while (1) {
int result = krk_debug_examineBreakpoint(breakIndex, &codeObject, &offset, &flags, &enabled);
if (result == -1) break;
if (result == -2) continue;
fprintf(stderr, "%-4d in %s+%d %s %s\n",
breakIndex,
codeObject->name->chars,
(int)offset,
flags == KRK_BREAKPOINT_NORMAL ? "normal":
flags == KRK_BREAKPOINT_REPEAT ? "repeat" :
flags == KRK_BREAKPOINT_ONCE ? "once" : "?",
enabled ? "enabled" : "disabled");
breakIndex++;
}
} else {
fprintf(stderr, "Unrecognized info object: %s\n", arg);
}
} else if (!strcmp(buf, "e") || !strcmp(buf, "enable")) {
if (!arg) {
fprintf(stderr, "enable requires an argument\n");
continue;
}
int breakIndex = atoi(arg);
if (krk_debug_enableBreakpoint(breakIndex)) {
fprintf(stderr, "Invalid breakpoint handle.\n");
} else {
fprintf(stderr, "Breakpoint %d enabled.\n", breakIndex);
}
} else if (!strcmp(buf, "d") || !strcmp(buf, "disable")) {
if (!arg) {
fprintf(stderr, "disable requires an argument\n");
continue;
}
int breakIndex = atoi(arg);
if (krk_debug_disableBreakpoint(breakIndex)) {
fprintf(stderr, "Invalid breakpoint handle.\n");
} else {
fprintf(stderr, "Breakpoint %d disabled.\n", breakIndex);
}
} else if (!strcmp(buf, "r") || !strcmp(buf, "remove")) {
if (!arg) {
fprintf(stderr, "remove requires an argument\n");
continue;
}
int breakIndex = atoi(arg);
if (krk_debug_removeBreakpoint(breakIndex)) {
fprintf(stderr, "Invalid breakpoint handle.\n");
} else {
fprintf(stderr, "Breakpoint %d removed.\n", breakIndex);
}
} else if (!strcmp(buf, "help")) {
fprintf(stderr,
"Kuroko Interactive Debugger\n"
" c continue - Continue until the next breakpoint.\n"
" s step - Execute this instruction and return to the debugger.\n"
" bt backtrace - Print a backtrace.\n"
" q quit - Exit the interpreter.\n"
" abort - Abort the interpreter (may create a core dump).\n"
" b break ... - Set a breakpoint.\n"
" e enable N - Enable breakpoint 'N'.\n"
" d disable N - Disable breakpoint 'N'.\n"
" r remove N - Remove breakpoint 'N'.\n"
" i info ... - See information about breakpoints.\n"
"\n"
"Empty input lines will repeat the last command.\n"
);
} else {
fprintf(stderr, "Unrecognized command: %s\n", buf);
}
}
return KRK_DEBUGGER_CONTINUE;
_dbgQuit:
return KRK_DEBUGGER_QUIT;
}
static void handleSigint(int sigNum) {
/* Don't set the signal flag if the VM is not running */
if (!krk_currentThread.frameCount) return;
krk_currentThread.flags |= KRK_THREAD_SIGNALLED;
}
static void bindSignalHandlers(void) {
signal(SIGINT, handleSigint);
}
static void findInterpreter(char * argv[]) {
#ifdef _WIN32
vm.binpath = strdup(_pgmptr);
#else
/* Try asking /proc */
char tmp[4096];
char * binpath = realpath("/proc/self/exe", tmp);
if (!binpath || (access(binpath, X_OK) != 0)) {
if (strchr(argv[0], '/')) {
binpath = realpath(argv[0], tmp);
} else {
/* Search PATH for argv[0] */
char * _path = strdup(getenv("PATH"));
char * path = _path;
while (path) {
char * next = strchr(path,':');
if (next) *next++ = '\0';
snprintf(tmp, 4096, "%s/%s", path, argv[0]);
if (access(tmp, X_OK) == 0) {
binpath = tmp;
break;
}
path = next;
}
free(_path);
}
}
if (binpath) {
vm.binpath = strdup(binpath);
} /* Else, give up at this point and just don't attach it at all. */
#endif
}
static int runString(char * argv[], int flags, char * string) {
findInterpreter(argv);
krk_initVM(flags);
krk_startModule("__main__");
krk_attachNamedValue(&krk_currentThread.module->fields,"__doc__", NONE_VAL());
krk_interpret(string, "<stdin>");
krk_freeVM();
return 0;
}
static int compileFile(char * argv[], int flags, char * fileName) {
findInterpreter(argv);
krk_initVM(flags);
/* Open the file. */
FILE * f = fopen(fileName,"r");
if (!f) {
fprintf(stderr, "%s: could not read file '%s': %s\n", argv[0], fileName, strerror(errno));
return 1;
}
/* Read it like we normally do... */
fseek(f, 0, SEEK_END);
size_t size = ftell(f);
fseek(f, 0, SEEK_SET);
char * buf = malloc(size+1);
if (fread(buf, 1, size, f) != size) return 2;
fclose(f);
buf[size] = '\0';
/* Set up a module scope */
krk_startModule("__main__");
/* Call the compiler directly. */
KrkCodeObject * func = krk_compile(buf, fileName);
/* See if there was an exception. */
if (krk_currentThread.flags & KRK_THREAD_HAS_EXCEPTION) {
krk_dumpTraceback();
}
/* Free the source string */
free(buf);
/* Close out the compiler */
krk_freeVM();
return func == NULL;
}
#ifdef BUNDLE_LIBS
#define BUNDLED(name) do { \
extern KrkValue krk_module_onload_ ## name (); \
KrkValue moduleOut = krk_module_onload_ ## name (); \
krk_attachNamedValue(&vm.modules, # name, moduleOut); \
krk_attachNamedObject(&AS_INSTANCE(moduleOut)->fields, "__name__", (KrkObj*)krk_copyString(#name, sizeof(#name)-1)); \
krk_attachNamedValue(&AS_INSTANCE(moduleOut)->fields, "__file__", NONE_VAL()); \
} while (0)
#endif
int main(int argc, char * argv[]) {
#ifdef _WIN32
SetConsoleOutputCP(65001);
SetConsoleCP(65001);
#endif
int flags = 0;
int moduleAsMain = 0;
int opt;
while ((opt = getopt(argc, argv, "+c:C:dgm:rstMSV-:")) != -1) {
switch (opt) {
case 'c':
return runString(argv, flags, optarg);
case 'd':
/* Disassemble code blocks after compilation. */
flags |= KRK_THREAD_ENABLE_DISASSEMBLY;
break;
case 'g':
/* Always garbage collect during an allocation. */
flags |= KRK_GLOBAL_ENABLE_STRESS_GC;
break;
case 's':
/* Print debug information during compilation. */
flags |= KRK_THREAD_ENABLE_SCAN_TRACING;
break;
case 'S':
flags |= KRK_THREAD_SINGLE_STEP;
break;
case 't':
/* Disassemble instructions as they are executed. */
flags |= KRK_THREAD_ENABLE_TRACING;
break;
case 'm':
moduleAsMain = 1;
optind--; /* to get us back to optarg */
goto _finishArgs;
case 'r':
enableRline = 0;
break;
case 'M':
return runString(argv,0,"import kuroko; print(kuroko.module_paths)\n");
case 'V':
return runString(argv,0,"import kuroko; print('Kuroko',kuroko.version)\n");
case 'C':
return compileFile(argv,flags,optarg);
case '-':
if (!strcmp(optarg,"version")) {
return runString(argv,0,"import kuroko; print('Kuroko',kuroko.version)\n");
} else if (!strcmp(optarg,"help")) {
fprintf(stderr,"usage: %s [flags] [FILE...]\n"
"\n"
"Interpreter options:\n"
" -d Debug output from the bytecode compiler.\n"
" -g Collect garbage on every allocation.\n"
" -m mod Run a module as a script.\n"
" -r Disable complex line editing in the REPL.\n"
" -s Debug output from the scanner/tokenizer.\n"
" -t Disassemble instructions as they are exceuted.\n"
" -C file Compile 'file', but do not execute it.\n"
" -M Print the default module import paths.\n"
" -S Enable single-step debugging.\n"
" -V Print version information.\n"
"\n"
" --version Print version information.\n"
" --help Show this help text.\n"
"\n"
"If no files are provided, the interactive REPL will run.\n",
argv[0]);
return 0;
} else {
fprintf(stderr,"%s: unrecognized option '--%s'\n",
argv[0], optarg);
return 1;
}
}
}
_finishArgs:
findInterpreter(argv);
krk_initVM(flags);
krk_debug_registerCallback(debuggerHook);
/* Attach kuroko.argv - argv[0] will be set to an empty string for the repl */
if (argc == optind) krk_push(OBJECT_VAL(krk_copyString("",0)));
for (int arg = optind; arg < argc; ++arg) {
krk_push(OBJECT_VAL(krk_copyString(argv[arg],strlen(argv[arg]))));
}
KrkValue argList = krk_list_of(argc - optind + (optind == argc), &krk_currentThread.stackTop[-(argc - optind + (optind == argc))],0);
krk_push(argList);
krk_attachNamedValue(&vm.system->fields, "argv", argList);
krk_pop();
for (int arg = optind; arg < argc + (optind == argc); ++arg) krk_pop();
/* Bind interrupt signal */
bindSignalHandlers();
#ifdef BUNDLE_LIBS
/* Add any other modules you want to include that are normally built as shared objects. */
BUNDLED(math);
#endif
KrkValue result = INTEGER_VAL(0);
/**
* Add general builtins that aren't part of the core VM.
* This is where we provide @c input in particular.
*/
KRK_DOC(BIND_FUNC(vm.builtins,input), "@brief Read a line of input.\n"
"@arguments [prompt], promptwidth=None, syntax=None\n\n"
"Read a line of input from @c stdin. If the @c rline library is available, "
"it will be used to gather input. Input reading stops on end-of file or when "
"a read ends with a line feed, which will be removed from the returned string. "
"If a prompt is provided, it will be printed without a line feed before requesting "
"input. If @c rline is available, the prompt will be passed to the library as the "
"left-hand prompt string. If not provided, @p promptwidth will default to the width "
"of @p prompt in codepoints; if you are providing a prompt with escape characters or "
"characters with multi-column East-Asian Character Width be sure to pass a value "
"for @p promptwidth that reflects the display width of your prompt. "
"If provided, @p syntax specifies the name of an @c rline syntax module to "
"provide color highlighting of the input line.");
if (moduleAsMain) {
krk_push(OBJECT_VAL(krk_copyString("__main__",8)));
int out = !krk_importModule(
AS_STRING(AS_LIST(argList)->values[0]),
AS_STRING(krk_peek(0)));
if (krk_currentThread.flags & KRK_THREAD_HAS_EXCEPTION) {
krk_dumpTraceback();
krk_resetStack();
}
return out;
} else if (optind == argc) {
/* Add builtins for the repl, but hide them from the globals() list. */
KRK_DOC(BIND_FUNC(vm.builtins,exit), "@brief Exit the interactive repl.\n\n"
"Only available from the interactive interpreter; exits the repl.");
KRK_DOC(BIND_FUNC(vm.builtins,paste), "@brief Toggle paste mode.\n"
"@arguments enabled=None\n\n"
"Toggles paste-safe mode, disabling automatic indentation in the repl. "
"If @p enabled is specified, the mode can be directly specified, otherwise "
"it will be set to the opposite of the current mode. The new mode will be "
"printed to stderr.");
/* The repl runs in the context of a top-level module so each input
* line can share a globals state with the others. */
krk_startModule("__main__");
krk_attachNamedValue(&krk_currentThread.module->fields,"__doc__", NONE_VAL());
/**
* Python stores version info in a built-in module called `sys`.
* We are not Python, we'll use `sys` to pretend to be Python
* in emulation mode, so we use a different module to store
* this sort of thing: kuroko
*
* This module won't be imported by default, but it's still in
* the modules list, so we can look for it there.
*/
KrkValue systemModule;
if (krk_tableGet(&vm.modules, OBJECT_VAL(krk_copyString("kuroko",6)), &systemModule)) {
KrkValue version, buildenv, builddate;
krk_tableGet(&AS_INSTANCE(systemModule)->fields, OBJECT_VAL(krk_copyString("version",7)), &version);
krk_tableGet(&AS_INSTANCE(systemModule)->fields, OBJECT_VAL(krk_copyString("buildenv",8)), &buildenv);
krk_tableGet(&AS_INSTANCE(systemModule)->fields, OBJECT_VAL(krk_copyString("builddate",9)), &builddate);
fprintf(stdout, "Kuroko %s (%s) with %s\n",
AS_CSTRING(version), AS_CSTRING(builddate), AS_CSTRING(buildenv));
}
fprintf(stdout, "Type `help` for guidance, `paste()` to toggle automatic indentation, `license` for copyright information.\n");
while (!exitRepl) {
size_t lineCapacity = 8;
size_t lineCount = 0;
char ** lines = ALLOCATE(char *, lineCapacity);
size_t totalData = 0;
int valid = 1;
char * allData = NULL;
int inBlock = 0;
int blockWidth = 0;
#ifndef NO_RLINE
/* Main prompt is >>> like in Python */
rline_exp_set_prompts(PROMPT_MAIN, "", 4, 0);
/* Set ^D to send EOF */
rline_exit_string="";
/* Enable syntax highlight for Kuroko */
rline_exp_set_syntax("krk");
/* Bind a callback for \t */
rline_exp_set_tab_complete_func(tab_complete_func);
#endif
while (1) {
/* This would be a nice place for line editing */
char buf[4096] = {0};
#ifndef NO_RLINE
if (inBlock) {
/* When entering multiple lines, the additional lines
* will show a single > (and keep the left side aligned) */
rline_exp_set_prompts(PROMPT_BLOCK, "", 4, 0);
/* Also add indentation as necessary */
if (!pasteEnabled) {
rline_preload = malloc(blockWidth + 1);
for (int i = 0; i < blockWidth; ++i) {
rline_preload[i] = ' ';
}
rline_preload[blockWidth] = '\0';
}
}
if (!enableRline) {
#else
if (1) {
#endif
fprintf(stdout, "%s", inBlock ? PROMPT_BLOCK : PROMPT_MAIN);
fflush(stdout);
}
#ifndef NO_RLINE
rline_scroll = 0;
if (enableRline) {
if (rline(buf, 4096) == 0) {
valid = 0;
exitRepl = 1;
break;
}
} else {
#endif
char * out = fgets(buf, 4096, stdin);
if (!out || !strlen(buf)) {
fprintf(stdout, "^D\n");
valid = 0;
exitRepl = 1;
break;
}
#ifndef NO_RLINE
}
#endif
if (buf[strlen(buf)-1] != '\n') {
/* rline shouldn't allow this as it doesn't accept ^D to submit input
* unless the line is empty, but just in case... */
fprintf(stderr, "Expected end of line in repl input. Did you ^D early?\n");
valid = 0;
break;
}
if (lineCapacity < lineCount + 1) {
/* If we need more space, grow as needed... */
size_t old = lineCapacity;
lineCapacity = GROW_CAPACITY(old);
lines = GROW_ARRAY(char *,lines,old,lineCapacity);
}
int i = lineCount++;
lines[i] = strdup(buf);
size_t lineLength = strlen(lines[i]);
totalData += lineLength;
/* Figure out indentation */
int isSpaces = 1;
int countSpaces = 0;
for (size_t j = 0; j < lineLength; ++j) {
if (lines[i][j] != ' ' && lines[i][j] != '\n') {
isSpaces = 0;
break;
}
countSpaces += 1;
}
/* Naively detect the start of a new block so we can
* continue to accept input. Our compiler isn't really
* set up to let us compile "on the fly" so we can't just
* run lines through it and see if it wants more... */
if (lineLength > 1 && lines[i][lineLength-2] == ':') {
inBlock = 1;
blockWidth = countSpaces + 4;
continue;
} else if (lineLength > 1 && lines[i][lineLength-2] == '\\') {
inBlock = 1;
continue;
} else if (inBlock && lineLength != 1) {
if (isSpaces) {
free(lines[i]);
totalData -= lineLength;
lineCount--;
break;
}
blockWidth = countSpaces;
continue;
} else if (lineLength > 1 && lines[i][countSpaces] == '@') {
inBlock = 1;
blockWidth = countSpaces;
continue;
}
/* Ignore blank lines. */
if (isSpaces && !i) valid = 0;
/* If we're not in a block, or have entered a blank line,
* we can stop reading new lines and jump to execution. */
break;
}
if (valid) {
allData = malloc(totalData + 1);
allData[0] = '\0';
}
for (size_t i = 0; i < lineCount; ++i) {
if (valid) strcat(allData, lines[i]);
#ifndef NO_RLINE
if (enableRline) rline_history_insert(strdup(lines[i]));
#endif
free(lines[i]);
}
FREE_ARRAY(char *, lines, lineCapacity);
if (valid) {
KrkValue result = krk_interpret(allData, "<stdin>");
if (!IS_NONE(result)) {
KrkClass * type = krk_getType(result);
const char * formatStr = " \033[1;30m=> %s\033[0m\n";
if (type->_reprer) {
krk_push(result);
result = krk_callSimple(OBJECT_VAL(type->_reprer), 1, 0);
} else if (type->_tostr) {
krk_push(result);
result = krk_callSimple(OBJECT_VAL(type->_tostr), 1, 0);
}
if (!IS_STRING(result)) {
fprintf(stdout, " \033[1;31m=> Unable to produce representation for value.\033[0m\n");
} else {
fprintf(stdout, formatStr, AS_CSTRING(result));
}
}
krk_resetStack();
free(allData);
}
(void)blockWidth;
}
} else {
krk_startModule("__main__");
result = krk_runfile(argv[optind],argv[optind]);
if (IS_NONE(result) && krk_currentThread.flags & KRK_THREAD_HAS_EXCEPTION) result = INTEGER_VAL(1);
}
krk_freeVM();
if (IS_INTEGER(result)) return AS_INTEGER(result);
return 0;
}
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