janet/src/core/run.c

158 lines
5.9 KiB
C

/*
* Copyright (c) 2019 Calvin Rose
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef JANET_AMALG
#include <janet/janet.h>
#include "state.h"
#include "vector.h"
#endif
/* Error reporting */
void janet_stacktrace(JanetFiber *fiber, const char *errtype, Janet err) {
int32_t fi;
const char *errstr = (const char *)janet_to_string(err);
JanetFiber **fibers = NULL;
fprintf(stderr, "%s error: %s\n", errtype, errstr);
while (fiber) {
janet_v_push(fibers, fiber);
fiber = fiber->child;
}
for (fi = janet_v_count(fibers) - 1; fi >= 0; fi--) {
fiber = fibers[fi];
int32_t i = fiber->frame;
while (i > 0) {
JanetStackFrame *frame = (JanetStackFrame *)(fiber->data + i - JANET_FRAME_SIZE);
JanetFuncDef *def = NULL;
i = frame->prevframe;
fprintf(stderr, " in");
if (frame->func) {
def = frame->func->def;
fprintf(stderr, " %s", def->name ? (const char *)def->name : "<anonymous>");
if (def->source) {
fprintf(stderr, " [%s]", (const char *)def->source);
}
} else {
JanetCFunction cfun = (JanetCFunction)(frame->pc);
if (cfun) {
Janet name = janet_table_get(janet_vm_registry, janet_wrap_cfunction(cfun));
if (!janet_checktype(name, JANET_NIL))
fprintf(stderr, " %s", (const char *)janet_to_string(name));
else
fprintf(stderr, " <cfunction>");
}
}
if (frame->flags & JANET_STACKFRAME_TAILCALL)
fprintf(stderr, " (tailcall)");
if (frame->func && frame->pc) {
int32_t off = (int32_t) (frame->pc - def->bytecode);
if (def->sourcemap) {
JanetSourceMapping mapping = def->sourcemap[off];
fprintf(stderr, " at (%d:%d)", mapping.start, mapping.end);
} else {
fprintf(stderr, " pc=%d", off);
}
}
fprintf(stderr, "\n");
}
}
janet_v_free(fibers);
}
/* Run a string */
int janet_dobytes(JanetTable *env, const uint8_t *bytes, int32_t len, const char *sourcePath, Janet *out) {
JanetParser parser;
int errflags = 0;
int32_t index = 0;
int dudeol = 0;
int done = 0;
Janet ret = janet_wrap_nil();
const uint8_t *where = sourcePath ? janet_cstring(sourcePath) : NULL;
if (where) janet_gcroot(janet_wrap_string(where));
janet_parser_init(&parser);
while (!errflags && !done) {
/* Evaluate parsed values */
while (janet_parser_has_more(&parser)) {
Janet form = janet_parser_produce(&parser);
JanetCompileResult cres = janet_compile(form, env, where);
if (cres.status == JANET_COMPILE_OK) {
JanetFunction *f = janet_thunk(cres.funcdef);
JanetFiber *fiber = janet_fiber(f, 64, 0, NULL);
JanetSignal status = janet_continue(fiber, janet_wrap_nil(), &ret);
if (status != JANET_SIGNAL_OK) {
janet_stacktrace(fiber, "runtime", ret);
errflags |= 0x01;
}
} else {
fprintf(stderr, "source path: %s\n", sourcePath);
janet_stacktrace(cres.macrofiber, "compile",
janet_wrap_string(cres.error));
errflags |= 0x02;
}
}
/* Dispatch based on parse state */
switch (janet_parser_status(&parser)) {
case JANET_PARSE_ERROR:
errflags |= 0x04;
fprintf(stderr, "parse error: %s\n", janet_parser_error(&parser));
break;
case JANET_PARSE_PENDING:
if (index >= len) {
if (dudeol) {
errflags |= 0x04;
fprintf(stderr, "internal parse error: unexpected end of source\n");
} else {
dudeol = 1;
janet_parser_consume(&parser, '\n');
}
} else {
janet_parser_consume(&parser, bytes[index++]);
}
break;
case JANET_PARSE_ROOT:
if (index >= len) {
done = 1;
} else {
janet_parser_consume(&parser, bytes[index++]);
}
break;
}
}
janet_parser_deinit(&parser);
if (where) janet_gcunroot(janet_wrap_string(where));
if (out) *out = ret;
return errflags;
}
int janet_dostring(JanetTable *env, const char *str, const char *sourcePath, Janet *out) {
int32_t len = 0;
while (str[len]) ++len;
return janet_dobytes(env, (const uint8_t *)str, len, sourcePath, out);
}