mirror of
https://github.com/janet-lang/janet
synced 2024-11-14 12:44:49 +00:00
105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*
|
|
* 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 "internal.h"
|
|
|
|
int dst_checkerr(Dst *vm) { return !!vm->flags; }
|
|
|
|
void dst_return(Dst *vm, DstValue x) {
|
|
vm->ret = x;
|
|
}
|
|
|
|
void dst_throw(Dst *vm) {
|
|
vm->flags = 1;
|
|
vm->ret = dst_popv(vm);
|
|
}
|
|
|
|
void dst_cerr(Dst *vm, const char *message) {
|
|
vm->flags = 1;
|
|
vm->ret = dst_string_cv(vm, message);
|
|
}
|
|
|
|
/* Read both tuples and arrays as c pointers + uint32_t length. Return 1 if the
|
|
* view can be constructed, 0 if an invalid type. */
|
|
int dst_seq_view(DstValue seq, const DstValue **data, uint32_t *len) {
|
|
if (seq.type == DST_ARRAY) {
|
|
*data = seq.as.array->data;
|
|
*len = seq.as.array->count;
|
|
return 1;
|
|
} else if (seq.type == DST_TUPLE) {
|
|
*data = seq.as.st;
|
|
*len = dst_tuple_length(seq.as.st);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Read both strings and buffer as unsigned character array + uint32_t len.
|
|
* Returns 1 if the view can be constructed and 0 if the type is invalid. */
|
|
int dst_chararray_view(DstValue str, const uint8_t **data, uint32_t *len) {
|
|
if (str.type == DST_STRING || str.type == DST_SYMBOL) {
|
|
*data = str.as.string;
|
|
*len = dst_string_length(str.as.string);
|
|
return 1;
|
|
} else if (str.type == DST_BUFFER) {
|
|
*data = str.as.buffer->data;
|
|
*len = str.as.buffer->count;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Read both structs and tables as the entries of a hashtable with
|
|
* identical structure. Returns 1 if the view can be constructed and
|
|
* 0 if the type is invalid. */
|
|
int dst_hashtable_view(DstValue tab, const DstValue **data, uint32_t *cap) {
|
|
if (tab.type == DST_TABLE) {
|
|
*data = tab.as.table->data;
|
|
*cap = tab.as.table->capacity;
|
|
return 1;
|
|
} else if (tab.type == DST_STRUCT) {
|
|
*data = tab.as.st;
|
|
*cap = dst_struct_capacity(tab.as.st);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Convert an index used by the capi to an absolute index */
|
|
uint32_t dst_startrange(int64_t index, uint32_t modulo) {
|
|
if (index < 0) index += modulo;
|
|
return ((index >= 0 && index < modulo)) ? ((uint32_t) index) : 0;
|
|
}
|
|
|
|
/* Convert an index used by the capi to an absolute index */
|
|
uint32_t dst_endrange(int64_t index, uint32_t modulo) {
|
|
return dst_startrange(index, modulo + 1);
|
|
}
|
|
|
|
/* Convert a possibly negative index to a positive index on the current stack. */
|
|
int64_t dst_normalize_index(Dst *vm, int64_t index) {
|
|
if (index < 0) {
|
|
index += dst_frame_size(dst_thread_stack(vm->thread));
|
|
}
|
|
return index;
|
|
}
|