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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"
#include "../../lib/exception.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 *lsMode;
lSymbol *lsSize;
lSymbol *lsUserID;
lSymbol *lsGroupID;
lSymbol *lsAccessTime;
lSymbol *lsModificationTime;
lSymbol *lsError;
lSymbol *lsErrorNumber;
lSymbol *lsErrorText;
lSymbol *lsRegularFile;
lSymbol *lsDirectory;
lSymbol *lsCharacterDevice;
lSymbol *lsBlockDevice;
lSymbol *lsNamedPipe;
void setIOSymbols(){
lsError = RSYMP(lSymS("error?"));
lsErrorNumber = RSYMP(lSymS("error-number"));
lsErrorText = RSYMP(lSymS("error-text"));
lsMode = RSYMP(lSymS("mode"));
lsSize = RSYMP(lSymS("size"));
lsUserID = RSYMP(lSymS("user-id"));
lsGroupID = RSYMP(lSymS("group-id"));
lsAccessTime = RSYMP(lSymS("access-time"));
lsModificationTime = RSYMP(lSymS("modification-time"));
lsRegularFile = RSYMP(lSymS("regular-file?"));
lsDirectory = RSYMP(lSymS("directory?"));
lsCharacterDevice = RSYMP(lSymS("character-device?"));
lsBlockDevice = RSYMP(lSymS("block-device?"));
lsNamedPipe = RSYMP(lSymS("named-pipe?"));
}
static lVal *lnfQuit(lClosure *c, lVal *v){
(void)c;
exit(castToInt(lCar(v),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);
}
static lVal *lnfPrint(lClosure *c, lVal *v){
(void)c;
lWriteVal(lCar(v));
return NULL;
}
static lVal *lnfError(lClosure *c, lVal *v){
(void)c;
lDisplayErrorVal(lCar(v));
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 = RVP(lValTree(NULL));
ret->vTree = lTreeInsert(ret->vTree, lsError, RVP(lValBool(err)));
if(err){
ret->vTree = lTreeInsert(ret->vTree, lsErrorNumber, RVP(lValInt(errno)));
ret->vTree = lTreeInsert(ret->vTree, lsErrorText, RVP(lValString(strerror(errno))));
}else{
ret->vTree = lTreeInsert(ret->vTree, lsMode, RVP(lValInt(statbuf.st_mode)));
ret->vTree = lTreeInsert(ret->vTree, lsUserID, RVP(lValInt(statbuf.st_uid)));
ret->vTree = lTreeInsert(ret->vTree, lsGroupID, RVP(lValInt(statbuf.st_gid)));
ret->vTree = lTreeInsert(ret->vTree, lsSize, RVP(lValInt(statbuf.st_size)));
ret->vTree = lTreeInsert(ret->vTree, lsAccessTime, RVP(lValInt(statbuf.st_atime)));
ret->vTree = lTreeInsert(ret->vTree, lsModificationTime, RVP(lValInt(statbuf.st_mtime)));
ret->vTree = lTreeInsert(ret->vTree, lsRegularFile, RVP(lValBool(S_ISREG(statbuf.st_mode))));
ret->vTree = lTreeInsert(ret->vTree, lsDirectory, RVP(lValBool(S_ISDIR(statbuf.st_mode))));
ret->vTree = lTreeInsert(ret->vTree, lsCharacterDevice, RVP(lValBool(S_ISCHR(statbuf.st_mode))));
ret->vTree = lTreeInsert(ret->vTree, lsBlockDevice, RVP(lValBool(S_ISBLK(statbuf.st_mode))));
ret->vTree = lTreeInsert(ret->vTree, lsNamedPipe, RVP(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)){
lPrintError("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 openeing %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;
lVal *ret = lRootsValPush(lCons(NULL,NULL));
ret->vList.car = lValInt(exitCode);
ret->vList.cdr = lValStringNoCopy(buf,len);
return ret;
}
#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 = lRootsValPush(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);
}
