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janet/core/stl.c
Calvin Rose 01e8749f39 Redo function call bytecode interface to be simpler and allow 
for an apply like structure in the language
2017-04-19 09:02:12 -04:00

471 lines
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/*
* Copyright (c) 2017 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.
*/
#include <gst/gst.h>
#include <gst/parse.h>
#include <gst/compile.h>
#include <gst/stl.h>
static const char GST_EXPECTED_NUMBER_OP[] = "expected operand to be number";
static const char GST_EXPECTED_STRING[] = "expected string";
/***/
/* Arithmetic */
/***/
#define SIMPLE_ACCUM_FUNCTION(name, start, op)\
int gst_stl_##name(Gst* vm) {\
GstValue ret;\
uint32_t j, count;\
ret.type = GST_NUMBER;\
ret.data.number = start;\
count = gst_count_args(vm);\
for (j = 0; j < count; ++j) {\
GstValue operand = gst_arg(vm, j);\
if (operand.type != GST_NUMBER)\
gst_c_throwc(vm, GST_EXPECTED_NUMBER_OP);\
ret.data.number op operand.data.number;\
}\
gst_c_return(vm, ret);\
}
SIMPLE_ACCUM_FUNCTION(add, 0, +=)
SIMPLE_ACCUM_FUNCTION(mul, 1, *=)
#undef SIMPLE_ACCUM_FUNCTION
#define UNARY_ACCUM_FUNCTION(name, zeroval, unaryop, op)\
int gst_stl_##name(Gst* vm) {\
GstValue ret;\
GstValue operand;\
uint32_t j, count;\
ret.type = GST_NUMBER;\
count = gst_count_args(vm);\
if (count == 0) {\
ret.data.number = zeroval;\
gst_c_return(vm, ret);\
}\
operand = gst_arg(vm, 0);\
if (operand.type != GST_NUMBER)\
gst_c_throwc(vm, GST_EXPECTED_NUMBER_OP);\
if (count == 1) {\
ret.data.number = unaryop operand.data.number;\
gst_c_return(vm, ret);\
} else {\
ret.data.number = operand.data.number;\
}\
for (j = 1; j < count; ++j) {\
operand = gst_arg(vm, j);\
if (operand.type != GST_NUMBER)\
gst_c_throwc(vm, GST_EXPECTED_NUMBER_OP);\
ret.data.number op operand.data.number;\
}\
gst_c_return(vm, ret);\
}
UNARY_ACCUM_FUNCTION(sub, 0, -, -=)
UNARY_ACCUM_FUNCTION(div, 1, 1/, /=)
#undef UNARY_ACCUM_FUNCTION
#define COMPARE_FUNCTION(name, check)\
int gst_stl_##name(Gst *vm) {\
GstValue ret;\
uint32_t i, count;\
count = gst_count_args(vm);\
ret.data.boolean = 1;\
ret.type = GST_BOOLEAN;\
if (count < 2) {\
gst_c_return(vm, ret);\
}\
for (i = 1; i < count; ++i) {\
GstValue lhs = gst_arg(vm, i - 1);\
GstValue rhs = gst_arg(vm, i);\
if (!(check)) {\
ret.data.boolean = 0;\
break;\
}\
}\
gst_c_return(vm, ret);\
}
COMPARE_FUNCTION(lessthan, gst_compare(lhs, rhs) < 0)
COMPARE_FUNCTION(greaterthan, gst_compare(lhs, rhs) > 0)
COMPARE_FUNCTION(equal, gst_equals(lhs, rhs))
COMPARE_FUNCTION(lessthaneq, gst_compare(lhs, rhs) <= 0)
COMPARE_FUNCTION(greaterthaneq, gst_compare(lhs, rhs) >= 0)
#undef COMPARE_FUNCTION
/****/
/* Core */
/****/
/* Get length of object */
int gst_stl_length(Gst *vm) {
GstValue ret;
uint32_t count = gst_count_args(vm);
if (count == 0) {
ret.type = GST_NIL;
gst_c_return(vm, ret);
}
if (count == 1) {
ret.type = GST_NUMBER;
GstValue x = gst_arg(vm, 0);
switch (x.type) {
default:
gst_c_throwc(vm, "cannot get length");
case GST_STRING:
ret.data.number = gst_string_length(x.data.string);
break;
case GST_ARRAY:
ret.data.number = x.data.array->count;
break;
case GST_BYTEBUFFER:
ret.data.number = x.data.buffer->count;
break;
case GST_TUPLE:
ret.data.number = gst_tuple_length(x.data.tuple);
break;
case GST_OBJECT:
ret.data.number = x.data.object->count;
break;
}
}
gst_c_return(vm, ret);
}
/* Get nth argument, not including first argument */
int gst_stl_select(Gst *vm) {
GstValue selector;
uint32_t count, n;
count = gst_count_args(vm);
if (count == 0)
gst_c_throwc(vm, "select takes at least one argument");
selector = gst_arg(vm, 0);
if (selector.type != GST_NUMBER)
gst_c_throwc(vm, GST_EXPECTED_NUMBER_OP);
n = selector.data.number;
gst_c_return(vm, gst_arg(vm, n + 1));
}
/* Get type of object */
int gst_stl_type(Gst *vm) {
GstValue x;
const char *typestr = "nil";
uint32_t count = gst_count_args(vm);
if (count == 0)
gst_c_throwc(vm, "expected at least 1 argument");
x = gst_arg(vm, 0);
switch (x.type) {
default:
break;
case GST_NUMBER:
typestr = "number";
break;
case GST_BOOLEAN:
typestr = "boolean";
break;
case GST_STRING:
typestr = "string";
break;
case GST_ARRAY:
typestr = "array";
break;
case GST_TUPLE:
typestr = "tuple";
break;
case GST_THREAD:
typestr = "thread";
break;
case GST_BYTEBUFFER:
typestr = "buffer";
break;
case GST_FUNCTION:
typestr = "function";
break;
case GST_CFUNCTION:
typestr = "cfunction";
break;
case GST_OBJECT:
typestr = "object";
break;
case GST_USERDATA:
typestr = "userdata";
break;
case GST_FUNCENV:
typestr = "funcenv";
break;
case GST_FUNCDEF:
typestr = "funcdef";
break;
}
gst_c_return(vm, gst_string_cv(vm, typestr));
}
/* Create array */
int gst_stl_array(Gst *vm) {
uint32_t i;
uint32_t count = gst_count_args(vm);
GstArray *array = gst_array(vm, count);
for (i = 0; i < count; ++i)
array->data[i] = gst_arg(vm, i);
gst_c_return(vm, gst_wrap_array(array));
}
/* Create tuple */
int gst_stl_tuple(Gst *vm) {
uint32_t i;
uint32_t count = gst_count_args(vm);
GstValue *tuple= gst_tuple_begin(vm, count);
for (i = 0; i < count; ++i)
tuple[i] = gst_arg(vm, i);
gst_c_return(vm, gst_wrap_tuple(gst_tuple_end(vm, tuple)));
}
/* Create object */
int gst_stl_object(Gst *vm) {
uint32_t i;
uint32_t count = gst_count_args(vm);
GstObject *object;
if (count % 2 != 0)
gst_c_throwc(vm, "expected even number of arguments");
object = gst_object(vm, 4 * count);
for (i = 0; i < count; i += 2)
gst_object_put(vm, object, gst_arg(vm, i), gst_arg(vm, i + 1));
gst_c_return(vm, gst_wrap_object(object));
}
/* Create struct */
int gst_stl_struct(Gst *vm) {
uint32_t i;
uint32_t count = gst_count_args(vm);
GstValue *st;
if (count % 2 != 0)
gst_c_throwc(vm, "expected even number of arguments");
st = gst_struct_begin(vm, count * 2);
for (i = 0; i < count; i += 2)
gst_struct_put(st, gst_arg(vm, i), gst_arg(vm, i + 1));
gst_c_return(vm, gst_wrap_struct(gst_struct_end(vm, st)));
}
/* Create a buffer */
int gst_stl_buffer(Gst *vm) {
uint32_t i, count;
GstBuffer *buf = gst_buffer(vm, 10);
count = gst_count_args(vm);
for (i = 0; i < count; ++i) {
const uint8_t *string = gst_to_string(vm, gst_arg(vm, i));
gst_buffer_append(vm, buf, string, gst_string_length(string));
}
gst_c_return(vm, gst_wrap_buffer(buf));
}
/* Concatenate string */
int gst_stl_strcat(Gst *vm) {
uint32_t j, count, length, index;
uint8_t *str;
count = gst_count_args(vm);
length = 0;
index = 0;
/* Find length and assert string arguments */
for (j = 0; j < count; ++j) {
GstValue arg = gst_arg(vm, j);
if (arg.type != GST_STRING)
gst_c_throwc(vm, GST_EXPECTED_STRING);
length += gst_string_length(arg.data.string);
}
/* Make string */
str = gst_string_begin(vm, length);
for (j = 0; j < count; ++j) {
GstValue arg = gst_arg(vm, j);
uint32_t slen = gst_string_length(arg.data.string);
gst_memcpy(str + index, arg.data.string, slen);
index += slen;
}
gst_c_return(vm, gst_wrap_string(gst_string_end(vm, str)));
}
/* Associative rawget */
int gst_stl_rawget(Gst *vm) {
GstValue ret;
uint32_t count;
const char *err;
count = gst_count_args(vm);
if (count != 2) {
gst_c_throwc(vm, "expects 2 arguments");
}
err = gst_get(gst_arg(vm, 0), gst_arg(vm, 1), &ret);
if (err != NULL)
gst_c_throwc(vm, err);
else
gst_c_return(vm, ret);
}
/* Associative rawset */
int gst_stl_rawset(Gst *vm) {
uint32_t count;
const char *err;
count = gst_count_args(vm);
if (count != 3) {
gst_c_throwc(vm, "expects 3 arguments");
}
err = gst_set(vm, gst_arg(vm, 0), gst_arg(vm, 1), gst_arg(vm, 2));
if (err != NULL) {
gst_c_throwc(vm, err);
} else {
gst_c_return(vm, gst_arg(vm, 0));
}
}
/* Get next key in struct or object */
int gst_stl_next(Gst *vm) {
GstValue ds = gst_arg(vm, 0);
GstValue key = gst_arg(vm, 1);
if (ds.type == GST_OBJECT) {
gst_c_return(vm, gst_object_next(ds.data.object, key));
} else if (ds.type == GST_STRUCT) {
gst_c_return(vm, gst_struct_next(ds.data.st, key));
} else {
gst_c_throwc(vm, "expected object or struct");
}
}
/* Print values for inspection */
int gst_stl_print(Gst *vm) {
uint32_t j, count;
count = gst_count_args(vm);
for (j = 0; j < count; ++j) {
uint32_t i;
const uint8_t *string = gst_to_string(vm, gst_arg(vm, j));
uint32_t len = gst_string_length(string);
for (i = 0; i < len; ++i)
fputc(string[i], stdout);
if (j < count - 1)
fputc(' ', stdout);
}
fputc('\n', stdout);
return GST_RETURN_OK;
}
/* To string */
int gst_stl_tostring(Gst *vm) {
const uint8_t *string = gst_to_string(vm, gst_arg(vm, 0));
gst_c_return(vm, gst_wrap_string(string));
}
/* Exit */
int gst_stl_exit(Gst *vm) {
int ret;
GstValue exitValue = gst_arg(vm, 0);
ret = (exitValue.type == GST_NUMBER) ? exitValue.data.number : 0;
exit(ret);
return GST_RETURN_OK;
}
/* Throw error */
int gst_stl_error(Gst *vm) {
GstValue errval = gst_arg(vm, 0);
gst_c_throw(vm, errval);
}
/****/
/* Serialization */
/****/
/* Serialize data into buffer */
int gst_stl_serialize(Gst *vm) {
const char *err;
uint32_t i;
GstValue buffer = gst_arg(vm, 0);
if (buffer.type != GST_BYTEBUFFER)
gst_c_throwc(vm, "expected buffer");
for (i = 1; i < gst_count_args(vm); ++i) {
err = gst_serialize(vm, buffer.data.buffer, gst_arg(vm, i));
if (err != NULL)
gst_c_throwc(vm, err);
}
gst_c_return(vm, buffer);
}
/****/
/* IO */
/****/
/* TODO - add userdata to allow for manipulation of FILE pointers. */
int gst_stl_open(Gst *vm) {
const uint8_t *fname = gst_to_string(vm, gst_arg(vm, 0));
const uint8_t *fmode = gst_to_string(vm, gst_arg(vm, 1));
FILE *f;
FILE **fp;
GstValue *st;
if (gst_count_args(vm) < 2)
gst_c_throwc(vm, "expected filename and filemode");
f = fopen((const char *)fname, (const char *)fmode);
if (!f)
gst_c_throwc(vm, "could not open file");
st = gst_struct_begin(vm, 0);
fp = gst_userdata(vm, sizeof(FILE *), gst_struct_end(vm, st));
gst_c_return(vm, gst_wrap_userdata(fp));
}
/****/
/* Bootstraping */
/****/
static const GstModuleItem const std_module[] = {
{"+", gst_stl_add},
{"*", gst_stl_mul},
{"-", gst_stl_sub},
{"/", gst_stl_div},
{"<", gst_stl_lessthan},
{">", gst_stl_greaterthan},
{"=", gst_stl_equal},
{"<=", gst_stl_lessthaneq},
{">=", gst_stl_greaterthaneq},
{"length", gst_stl_length},
{"type", gst_stl_type},
{"select", gst_stl_select},
{"array", gst_stl_array},
{"tuple", gst_stl_tuple},
{"object", gst_stl_object},
{"struct", gst_stl_struct},
{"buffer", gst_stl_buffer},
{"strcat", gst_stl_strcat},
{"print", gst_stl_print},
{"tostring", gst_stl_tostring},
{"exit", gst_stl_exit},
{"rawget", gst_stl_rawget},
{"rawset", gst_stl_rawset},
{"next", gst_stl_next},
{"error", gst_stl_error},
{"serialize", gst_stl_serialize},
{"open", gst_stl_open},
{NULL, NULL}
};
/* Load all libraries */
void gst_stl_load(Gst *vm) {
gst_module_put(vm, "std", gst_cmodule_struct(vm, std_module));
}
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