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/* Nujel - Copyright (C) 2020-2022 - Benjamin Vincent Schulenburg
* This project uses the MIT license, a copy should be included under /LICENSE */
#ifndef NUJEL_AMALGAMATION
#include "../nujel-private.h"
#endif
#include <stdlib.h>
#include <string.h>
const void *lBufferData (lBuffer *v){
return v == NULL ? NULL : v->buf;
}
void *lBufferDataMutable(lBuffer *v){
if(v->flags & BUFFER_IMMUTABLE){return NULL;}
return v == NULL ? NULL : v->buf;
}
const char *lStringData(const lString *v){
return v == NULL ? NULL : v->data;
}
size_t lBufferLength(const lBuffer *v){
return v == NULL ? 0 : v->length;
}
const void *lBufferViewData(lBufferView *v){
if(unlikely(v == NULL)){return NULL;}
if(unlikely(v->buf->flags & BUFFER_IMMUTABLE)){return NULL;}
return &((u8 *)v->buf->buf)[v->offset * lBufferViewTypeSize(v->type)];
}
void *lBufferViewDataMutable(lBufferView *v){
return &((u8 *)v->buf->buf)[v->offset * lBufferViewTypeSize(v->type)];
}
size_t lBufferViewLength(const lBufferView *v){
return v->length * lBufferViewTypeSize(v->type);
}
static lVal *lnfBufferAllocate(lClosure *c, lVal *v) {
const i64 size = requireNaturalInt(c, lCar(v));
lBuffer *buf = lBufferAlloc(size, false);
lVal *ret = lValAlloc(ltBuffer);
ret->vBuffer = buf;
return ret;
}
static lVal *lnfBufferLengthGet(lClosure *c, lVal *v){
lVal *car = lCar(v);
typeswitch(car){
default:
lExceptionThrowValClo("type-error", "Expected a buffer or something compatible", car, c);
return NULL;
case ltString:
case ltBuffer:
return lValInt(car->vBuffer->length);
case ltBufferView:
return lValInt(car->vBufferView->length);
}
}
static lVal *lnfBufferLengthSet(lClosure *c, lVal *v){
lVal *bufv = lCar(v);
lBuffer *buf = requireMutableBuffer(c, bufv);
const int length = requireNaturalInt(c, lCadr(v));
if(length < buf->length){
lExceptionThrowValClo("error", "Buffers can only grow, not shrink.", v, c);
}
void *nBuf = realloc(buf->buf, length);
if (unlikely(nBuf == NULL)) {
lExceptionThrowValClo("out-of-memory", "[buffer/length!] couldn't allocate its buffer", v, c);
return NULL;
}
memset(&((u8 *)nBuf)[buf->length], 0, length - buf->length);
buf->buf = nBuf;
buf->length = length;
return bufv;
}
static lVal *lnfBufferImmutableGet(lClosure *c, lVal *v){
lVal *car = lCar(v);
typeswitch(car){
case ltBufferView:
return lValBool(car->vBufferView->flags & BUFFER_VIEW_IMMUTABLE);
case ltString:
return lValBool(true);
case ltBuffer:
return lValBool(car->vBuffer->flags & BUFFER_IMMUTABLE);
}
lExceptionThrowValClo("type-error", "Can't get immutability info from that: ", car, c);
return NULL;
}
static lVal *bufferFromPointer(lClosure *c, bool immutable, const void *data, size_t length){
(void)c;
lBuffer *retBuf = lBufferAllocRaw();
retBuf->length = length;
retBuf->flags = immutable ? BUFFER_IMMUTABLE : 0;
retBuf->buf = malloc(length);
if (unlikely(retBuf->buf == NULL)) {
lExceptionThrowValClo("out-of-memory", "[buffer/length!] couldn't allocate its buffer", NULL, c);
return NULL;
}
memcpy(retBuf->buf, data, length);
lVal *retV = lValAlloc(ltBuffer);
retV->vBuffer = retBuf;
return retV;
}
static lVal *lnfBufferDup(lClosure *c, lVal *v){
lBuffer *buf = requireBuffer(c, lCar(v));
return bufferFromPointer(c, castToBool(lCadr(v)), buf->buf, buf->length);
}
static lVal *lnfBufferCopy(lClosure *c, lVal *v){
lVal *car = lCar(v);
lBuffer *dest = requireMutableBuffer(c, car);
lVal *vSrc = lCadr(v);
const int destOffset = requireNaturalInt(c, lCaddr(v));
const void *buf = NULL;
int length = 0;
typeswitch(vSrc){
case ltString:
case ltBuffer:
buf = vSrc->vBuffer->data;
length = castToInt(lCadddr(v), vSrc->vBuffer->length);
break;
}
if(unlikely((buf == NULL) || (length < 0))){
lExceptionThrowValClo("type-error", "Can't copy from that", vSrc, c);
return NULL;
}
if(unlikely(((length + destOffset) > dest->length) || (length > vSrc->vBuffer->length))){
lExceptionThrowValClo("out-of-bounds", "Can't fit everything in that buffer", v, c);
return NULL;
}
memcpy(&((u8*)dest->buf)[destOffset], buf, length);
return car;
}
static lVal *lnfStringToBuffer(lClosure *c, lVal *v){
lString *str = requireString(c, lCar(v));
return bufferFromPointer(c, castToBool(lCadr(v)), str->data, str->length);
}
static lVal *lnfBufferToString(lClosure *c, lVal *v){
lBuffer *buf = requireBuffer(c, lCar(v));
const i64 length = castToInt(lCadr(v), buf->length);
if(unlikely(length < 0)){
lExceptionThrowValClo("type-error", "Length has to be greater than 0", lCadr(v), c);
}
return lValStringLen(buf->buf, length);
}
static lVal *bufferView(lClosure *c, lVal *v, lBufferViewType T){
lBuffer *buf = requireBuffer(c, lCar(v));
const bool immutable = lCdr(v) ? castToBool(lCadr(v)) : buf->flags & BUFFER_IMMUTABLE;
if(unlikely(!immutable && (buf->flags & BUFFER_IMMUTABLE))){
lExceptionThrowValClo("type-error", "Can't create a mutable view for an immutable buffer", v, c);
}
const size_t length = buf->length / lBufferViewTypeSize(T);
lBufferView *bufView = lBufferViewAlloc(buf, T, 0, length, immutable);
lVal *ret = lValAlloc(ltBufferView);
ret->vBufferView = bufView;
return ret;
}
static lVal *lnfBufferViewU8(lClosure *c, lVal *v){ return bufferView(c, v, lbvtU8); }
static lVal *lnfBufferViewS8(lClosure *c, lVal *v){ return bufferView(c, v, lbvtS8); }
static lVal *lnfBufferViewU16(lClosure *c, lVal *v){ return bufferView(c, v, lbvtU16); }
static lVal *lnfBufferViewS16(lClosure *c, lVal *v){ return bufferView(c, v, lbvtS16); }
static lVal *lnfBufferViewU32(lClosure *c, lVal *v){ return bufferView(c, v, lbvtU32); }
static lVal *lnfBufferViewS32(lClosure *c, lVal *v){ return bufferView(c, v, lbvtS32); }
static lVal *lnfBufferViewF32(lClosure *c, lVal *v){ return bufferView(c, v, lbvtF32); }
static lVal *lnfBufferViewS64(lClosure *c, lVal *v){ return bufferView(c, v, lbvtS64); }
static lVal *lnfBufferViewF64(lClosure *c, lVal *v){ return bufferView(c, v, lbvtF64); }
static lVal *lnfBufferViewRef(lClosure *c, lVal *v){
const size_t i = requireNaturalInt(c, lCadr(v));
size_t length = 0;
const void *buf = NULL;
lVal *car = lCar(v);
lBufferViewType viewType;
typeswitch(car){
case ltBufferView:
buf = car->vBufferView->buf->buf;
length = car->vBufferView->length;
viewType = car->vBufferView->type;
break;
case ltString:
case ltBuffer:
buf = car->vBuffer->data;
length = car->vBuffer->length;
viewType = lbvtU8;
break;
}
if(buf == NULL){
lExceptionThrowValClo("type-error", "Can't ref that", car, c);
}
if(i >= length){
lExceptionThrowValClo("out-of-bounds","[buffer/view/ref] index provided is out of bounds", v, c);
}
switch(viewType){
default:
exit(5);
return NULL;
case lbvtU8:
return lValInt(((u8 *)buf)[i]);
case lbvtS8:
return lValInt(((i8 *)buf)[i]);
case lbvtU16:
return lValInt(((u16 *)buf)[i]);
case lbvtS16:
return lValInt(((i16 *)buf)[i]);
case lbvtU32:
return lValInt(((u32 *)buf)[i]);
case lbvtS32:
return lValInt(((i32 *)buf)[i]);
case lbvtS64:
return lValInt(((i64 *)buf)[i]);
case lbvtF32:
return lValFloat(c, ((float *)buf)[i]);
case lbvtF64:
return lValFloat(c, ((double *)buf)[i]);
}
}
static lVal *lnfBufferViewSet(lClosure *c, lVal *v){
lVal *car = lCar(v);
void *buf = NULL;
size_t length = 0;
lBufferViewType viewType;
const size_t i = requireNaturalInt(c, lCadr(v));
typeswitch(car){
case ltBufferView:
buf = car->vBufferView->buf->buf;
length = car->vBufferView->length;
viewType = car->vBufferView->type;
break;
case ltBuffer:
if(car->vBuffer->flags & BUFFER_IMMUTABLE){break;}
buf = car->vBuffer->buf;
length = car->vBuffer->length;
viewType = lbvtU8;
break;
}
if(buf == NULL){
lExceptionThrowValClo("type-error", "Can't set! in that", car, c);
}
if(i >= length){
lExceptionThrowValClo("out-of-bounds","[buffer/set!] index provided is out of bounds", v, c);
}
switch(viewType){
default:
exit(6);
case lbvtU8:
((u8 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtS8:
((i8 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtS16:
((i16 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtU16:
((u16 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtS32:
((i32 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtU32:
((u32 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtS64:
((i64 *)buf)[i] = requireInt(c, lCaddr(v));
break;
case lbvtF32:
((float *)buf)[i] = requireFloat(c, lCaddr(v));
break;
case lbvtF64:
((double *)buf)[i] = requireFloat(c, lCaddr(v));
break;
}
return car;
}
static lVal *lnfBufferViewBuffer(lClosure *c, lVal *v){
lBufferView *view = requireBufferView(c, lCar(v));
lVal *ret = lValAlloc(ltBuffer);
ret->vBuffer = view->buf;
return ret;
}
void lOperationsBuffer(lClosure *c){
lAddNativeFunc(c, "buffer/allocate", "[length]", "Allocate a new buffer of LENGTH", lnfBufferAllocate);
lAddNativeFunc(c, "buffer/length!", "[buf new-length]", "Set the size of BUF to NEW-LENGTH", lnfBufferLengthSet);
lAddNativeFunc(c, "buffer/dup", "[buf immutable?]", "Return a copy of BUF that might be IMMUTABLE", lnfBufferDup);
lAddNativeFunc(c, "buffer/copy", "[dest src dest-offset length]","Return a copy of BUF that might be IMMUTABLE", lnfBufferCopy);
lAddNativeFunc(c, "string->buffer", "[str immutable?]", "Copy STR into a buffer and return it", lnfStringToBuffer);
lAddNativeFunc(c, "buffer->string", "[buf length]", "Turn BUF into a string of LENGTH which defaults to the size of BUF", lnfBufferToString);
lAddNativeFunc(c, "buffer/u8*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewU8);
lAddNativeFunc(c, "buffer/s8*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewS8);
lAddNativeFunc(c, "buffer/u16*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewU16);
lAddNativeFunc(c, "buffer/s16*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewS16);
lAddNativeFunc(c, "buffer/u32*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewU32);
lAddNativeFunc(c, "buffer/s32*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewS32);
lAddNativeFunc(c, "buffer/f32*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewF32);
lAddNativeFunc(c, "buffer/s64*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewS64);
lAddNativeFunc(c, "buffer/f64*", "[buf immutable?]", "Create a new view for BUF spanning the entire area", lnfBufferViewF64);
lAddNativeFunc(c, "buffer-view->buffer", "[view]", "Return the buffer of VIEW", lnfBufferViewBuffer);
lAddNativeFunc(c, "buffer/ref", "[view off]", "Return the value in VIEW at OFF", lnfBufferViewRef);
lAddNativeFunc(c, "buffer/set!", "[view off val]", "Set the value of VIEW at OFF to VAL", lnfBufferViewSet);
lAddNativeFunc(c, "buffer/length", "[buf]", "Return the size of BUF in bytes", lnfBufferLengthGet);
lAddNativeFunc(c, "buffer/immutable?", "[buf]", "Return #t if BUF is immutable", lnfBufferImmutableGet);
}
