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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 */
#include "io.h"
#include "../misc.h"
#ifdef __WATCOMC__
#include <direct.h>
#else
#include <dirent.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#if (defined(__WATCOMC__)) || (defined(__EMSCRIPTEN__))
#define NO_POPEN
#else
#define ENABLE_POPEN
#endif
#if (!defined(__MINGW32__)) && (!defined(__WATCOMC__))
#include <sys/wait.h>
#endif
lSymbol *lsError;
lSymbol *lsErrorNumber;
lSymbol *lsErrorText;
lSymbol *lsMode;
lSymbol *lsSize;
lSymbol *lsUserID;
lSymbol *lsGroupID;
lSymbol *lsAccessTime;
lSymbol *lsModificationTime;
lSymbol *lsRegularFile;
lSymbol *lsDirectory;
lSymbol *lsCharacterDevice;
lSymbol *lsBlockDevice;
lSymbol *lsNamedPipe;
void (*ioMarkerChain)() = NULL;
void ioSymbolMarker(){
lSymbolGCMark(lsError);
lSymbolGCMark(lsErrorText);
lSymbolGCMark(lsMode);
lSymbolGCMark(lsSize);
lSymbolGCMark(lsUserID);
lSymbolGCMark(lsGroupID);
lSymbolGCMark(lsAccessTime);
lSymbolGCMark(lsModificationTime);
lSymbolGCMark(lsRegularFile);
lSymbolGCMark(lsDirectory);
lSymbolGCMark(lsCharacterDevice);
lSymbolGCMark(lsBlockDevice);
lSymbolGCMark(lsNamedPipe);
if(ioMarkerChain){ioMarkerChain();}
}
void setIOSymbols(){
lsError = lSymS("error?");
lsErrorNumber = lSymS("error-number");
lsErrorText = lSymS("error-text");
lsMode = lSymS("mode");
lsSize = lSymS("size");
lsUserID = lSymS("user-id");
lsGroupID = lSymS("group-id");
lsAccessTime = lSymS("access-time");
lsModificationTime = lSymS("modification-time");
lsRegularFile = lSymS("regular-file?");
lsDirectory = lSymS("directory?");
lsCharacterDevice = lSymS("character-device?");
lsBlockDevice = lSymS("block-device?");
lsNamedPipe = lSymS("named-pipe?");
ioMarkerChain = rootsMarkerChain;
rootsMarkerChain = ioSymbolMarker;
}
extern uint symbolLookups;
extern uint tombLookups;
static lVal *lnfQuit(lClosure *c, lVal *v){
(void)c;
if(lVerbose){
pf("\nLookups %u/%u == %f\n", (i64)symbolLookups, (i64)tombLookups, (double)tombLookups / (double)symbolLookups);
}
lVal *car = lCar(v);
exit((car && (car->type == ltInt)) ? car->vInt : 0);
return NULL;
}
static lVal *lnfInput(lClosure *c, lVal *v){
(void)c;
const char *prompt = castToString(lCar(v),NULL);
if(prompt != NULL){
pf("%s",prompt);
}
char buf[4096];
if(fgets(buf,sizeof(buf),stdin) == NULL){
return NULL;
}
return lValString(buf);
}
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
EM_JS(void, wasmConsoleLog, (const char *str), {
console.log(UTF8ToString(str));
});
EM_JS(void, wasmConsoleError, (const char *str), {
console.error(UTF8ToString(str));
});
#endif
static void lWriteVal(lVal *v, FILE *fp){
char dispWriteBuf[1<<16];
char *end = spf(dispWriteBuf,&dispWriteBuf[sizeof(dispWriteBuf)-1],"%V",v);
#ifdef __EMSCRIPTEN__
if(fp == stderr){
wasmConsoleError(dispWriteBuf);
}else{
wasmConsoleLog(dispWriteBuf);
}
#endif
fwrite(dispWriteBuf, end - dispWriteBuf, 1, fp);
}
static lVal *lnfError(lClosure *c, lVal *v){
(void)c;
lWriteVal(lCar(v), stderr);
return NULL;
}
static lVal *lnfPrint(lClosure *c, lVal *v){
(void)c;
lWriteVal(lCar(v), stdout);
return NULL;
}
static lVal *lnfFileRead(lClosure *c, lVal *v){
size_t len = 0;
lString *str = requireString(c, lCar(v));
const char *data = loadFile(str->data,&len);
return lValStringNoCopy(data, len);
}
static lVal *lnfFileWrite(lClosure *c, lVal *v){
lVal *contentV = lCar(v);
lString *content = requireString(c, contentV);
lString *filename = requireString(c, lCadr(v));
saveFile(filename->data, content->data, lStringLength(content));
return contentV;
}
static lVal *lnfFileRemove(lClosure *c, lVal *v){
lVal *car = lCar(v);
lString *filename = requireString(c, car);
unlink(filename->data);
return car;
}
static lVal *lnfFileStat(lClosure *c, lVal *v){
lString *filename = requireString(c, lCar(v));
struct stat statbuf;
int err = stat(filename->data, &statbuf);
lVal *ret = lValTree(NULL);
ret->vTree = lTreeInsert(ret->vTree, lsError, lValBool(err));
if(err){
ret->vTree = lTreeInsert(ret->vTree, lsErrorNumber, lValInt(errno));
ret->vTree = lTreeInsert(ret->vTree, lsErrorText, lValString(strerror(errno)));
}else{
ret->vTree = lTreeInsert(ret->vTree, lsMode, lValInt(statbuf.st_mode));
ret->vTree = lTreeInsert(ret->vTree, lsUserID, lValInt(statbuf.st_uid));
ret->vTree = lTreeInsert(ret->vTree, lsGroupID, lValInt(statbuf.st_gid));
ret->vTree = lTreeInsert(ret->vTree, lsSize, lValInt(statbuf.st_size));
ret->vTree = lTreeInsert(ret->vTree, lsAccessTime, lValInt(statbuf.st_atime));
ret->vTree = lTreeInsert(ret->vTree, lsModificationTime, lValInt(statbuf.st_mtime));
ret->vTree = lTreeInsert(ret->vTree, lsRegularFile, lValBool(S_ISREG(statbuf.st_mode)));
ret->vTree = lTreeInsert(ret->vTree, lsDirectory, lValBool(S_ISDIR(statbuf.st_mode)));
ret->vTree = lTreeInsert(ret->vTree, lsCharacterDevice, lValBool(S_ISCHR(statbuf.st_mode)));
ret->vTree = lTreeInsert(ret->vTree, lsBlockDevice, lValBool(S_ISBLK(statbuf.st_mode)));
ret->vTree = lTreeInsert(ret->vTree, lsNamedPipe, lValBool(S_ISFIFO(statbuf.st_mode)));
}
return ret;
}
static lVal *lnfFileTemp(lClosure *c, lVal *v){
lString *content = requireString(c, lCar(v));
const char *ret = tempFilename();
FILE *fd = fopen(ret,"w");
const int len = lStringLength(content);
int written = 0;
while(written < len){
int r = fwrite(&content->data[written], 1, len - written, fd);
if(r <= 0){
if(ferror(fd)){
fpf(stderr, "Error while writing to temporary file: %s\n", ret);
break;
}
}else{
written += r;
}
}
fclose(fd);
return lValString(ret);
}
#ifdef ENABLE_POPEN
static lVal *lnfPopen(lClosure *c, lVal *v){
lString *command = requireString(c, lCar(v));
const int readSize = 1<<12;
int len = 0;
int bufSize = readSize;
char *buf = malloc(readSize);
FILE *child = popen(command->data, "r");
if(child == NULL){
fpf(stderr,"Error opening %s\n",command);
return NULL;
}
while(1){
const int ret = fread(&buf[len],1,readSize,child);
if(ret < readSize){
if(feof(child)){
len += ret;
break;
}else if(ferror(child)){
pclose(child);
return NULL;
}
}
if(ret > 0){len += ret;}
if((len + readSize) >= bufSize){
bufSize += readSize;
buf = realloc(buf,bufSize);
}
}
#ifdef __MINGW32__
int exitCode = pclose(child);
#else
int exitStatus = pclose(child);
int exitCode = WEXITSTATUS(exitStatus);
#endif
buf = realloc(buf,len+1);
buf[len] = 0;
return lCons(lValInt(exitCode),lValStringNoCopy(buf,len));
}
#else
static lVal *lnfPopen(lClosure *c, lVal *v){
lExceptionThrowValClo("not-available","[popen] is not implemented on your current platform, please try and work around that", v, c);
return NULL;
}
#endif
static lVal *lnfDirectoryRead(lClosure *c, lVal *v){
lString *path = requireString(c, lCar(v));
const bool showHidden = castToBool(lCadr(v));
DIR *dp = opendir(path->data);
if(dp == NULL){return NULL;}
lVal *ret = NULL;
lVal *cur = NULL;
for(struct dirent *de = readdir(dp); de ; de = readdir(dp)){
if(!showHidden){
if(de->d_name[0] == '.'){continue;}
}
if((de->d_name[0] == '.') && (de->d_name[1] == 0)){continue;}
if((de->d_name[0] == '.') && (de->d_name[1] == '.') && (de->d_name[2] == 0)){continue;}
if(cur == NULL){
ret = cur = lCons(NULL,NULL);
}else{
cur = cur->vList.cdr = lCons(NULL,NULL);
}
cur->vList.car = lValString(de->d_name);
}
closedir(dp);
return ret;
}
static lVal *lnfDirectoryMake(lClosure *c, lVal *v){
lString *path = requireString(c, lCar(v));
return lValBool(makeDir(path->data) == 0);
}
static lVal *lnfDirectoryRemove(lClosure *c, lVal *v){
lString *path = requireString(c, lCar(v));
return lValBool(rmdir(path->data) == 0);
}
static lVal *lnfChangeDirectory(lClosure *c, lVal *v){
lString *path = requireString(c, lCar(v));
return lValBool(chdir(path->data) == 0);
}
static lVal *lnfGetCurrentWorkingDirectory(lClosure *c, lVal *v){
(void)c;(void)v;
char path[512];
if(getcwd(path, sizeof(path)) == NULL){
return NULL;
}
return lValString(path);
}
void lOperationsIO(lClosure *c){
lAddNativeFunc(c,"error", "[v]", "Prints v to stderr", lnfError);
lAddNativeFunc(c,"print", "[v]", "Displays v", lnfPrint);
lAddNativeFunc(c,"input", "[]", "Reads in a line of user input and returns it", lnfInput);
lAddNativeFunc(c,"exit", "[a]", "Quits with code a", lnfQuit);
lAddNativeFunc(c,"popen", "[command]", "Return a list of [exit-code stdout stderr]", lnfPopen);
lAddNativeFunc(c,"file/read", "[path]", "Load FILENAME and return the contents as a string", lnfFileRead);
lAddNativeFunc(c,"file/write", "[content path]", "Writes CONTENT into FILENAME", lnfFileWrite);
lAddNativeFunc(c,"file/remove", "[path]", "Remove FILENAME from the filesystem, if possible", lnfFileRemove);
lAddNativeFunc(c,"file/temp", "[content]", "Write CONTENT to a temp file and return its path", lnfFileTemp);
lAddNativeFunc(c,"file/stat", "[path]", "Return some stats about FILENAME", lnfFileStat);
lAddNativeFunc(c,"directory/read", "[path show-hidden]", "Return all files within $PATH", lnfDirectoryRead);
lAddNativeFunc(c,"directory/remove", "[path]", "Remove empty directory at PATH", lnfDirectoryRemove);
lAddNativeFunc(c,"directory/make", "[path]", "Create a new empty directory at PATH", lnfDirectoryMake);
lAddNativeFunc(c,"path/change", "[path]", "Change the current working directory to PATH", lnfChangeDirectory);
lAddNativeFunc(c,"path/working-directory","[]", "Return the current working directory", lnfGetCurrentWorkingDirectory);
}
