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/*****
* util.cc
* John Bowman
*
* A place for useful utility functions.
*****/
#ifdef __CYGWIN__
#define _POSIX_C_SOURCE 200809L
#endif
#include <cassert>
#include <iostream>
#include <cstdio>
#include <cfloat>
#include <sstream>
#include <cerrno>
#include <sys/wait.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <cstring>
#include <algorithm>
#include <dirent.h>
#include "util.h"
#include "settings.h"
#include "errormsg.h"
#include "camperror.h"
#include "interact.h"
#include "locate.h"
using namespace settings;
using camp::reportError;
bool False=false;
namespace vm {
void error(const char* message);
}
#if __GNUC__
#include <cxxabi.h>
string demangle(const char *s)
{
int status;
char *demangled = abi::__cxa_demangle(s,NULL,NULL,&status);
if (status == 0 && demangled) {
string str(demangled);
free(demangled);
return str;
} else if (status == -2) {
free(demangled);
return s;
} else {
free(demangled);
return string("Unknown(") + s + ")";
}
}
#else
string demangle(const char* s)
{
return s;
}
#endif
char *Strdup(string s)
{
size_t size=s.size()+1;
char *dest=new(UseGC) char[size];
std::memcpy(dest,s.c_str(),size*sizeof(char));
return dest;
}
char *StrdupNoGC(string s)
{
size_t size=s.size()+1;
char *dest=new char[size];
std::memcpy(dest,s.c_str(),size*sizeof(char));
return dest;
}
char *StrdupMalloc(string s)
{
size_t size=s.size()+1;
char *dest=(char *) std::malloc(size);
std::memcpy(dest,s.c_str(),size*sizeof(char));
return dest;
}
string stripDir(string name)
{
size_t p;
#ifdef __MSDOS__
p=name.rfind('\\');
if(p < string::npos) name.erase(0,p+1);
#endif
p=name.rfind('/');
if(p < string::npos) name.erase(0,p+1);
return name;
}
string stripFile(string name)
{
size_t p;
bool dir=false;
#ifdef __MSDOS__
p=name.rfind('\\');
if(p < string::npos) {
dir=true;
while(p > 0 && name[p-1] == '\\') --p;
name.erase(p+1);
}
#endif
p=name.rfind('/');
if(p < string::npos) {
dir=true;
while(p > 0 && name[p-1] == '/') --p;
name.erase(p+1);
}
return dir ? name : "";
}
string stripExt(string name, const string& ext)
{
string suffix="."+ext;
size_t p=name.rfind(suffix);
size_t n=suffix.length();
if(n == 1 || p == name.length()-n)
return name.substr(0,p);
else return name;
}
void backslashToSlash(string& s)
{
size_t p;
while((p=s.find('\\')) < string::npos)
s[p]='/';
}
void spaceToUnderscore(string& s)
{
size_t p;
while((p=s.find(' ')) < string::npos)
s[p]='_';
}
string Getenv(const char *name, bool msdos)
{
char *s=getenv(name);
if(!s) return "";
string S=string(s);
if(msdos) backslashToSlash(S);
return S;
}
void readDisabled()
{
camp::reportError("Read from other directories disabled; override with option -globalread");
}
void writeDisabled()
{
camp::reportError("Write to other directories disabled; override with option -globalwrite");
}
string cleanpath(string name)
{
string dir=stripFile(name);
name=stripDir(name);
spaceToUnderscore(name);
return dir+name;
}
string inpath(string name)
{
bool global=globalread();
string dir=stripFile(name);
if(global && !dir.empty()) return name;
string indir=stripFile(outname());
if(!(global || dir.empty() || dir == indir)) readDisabled();
return stripDir(name);
}
string outpath(string name)
{
bool global=globalwrite();
string dir=stripFile(name);
if(global && !dir.empty()) return name;
string outdir=stripFile(outname());
if(!(global || dir.empty() || dir == outdir)) writeDisabled();
return outdir+stripDir(name);
}
string buildname(string name, string suffix, string aux)
{
name=stripExt(outpath(name),defaultformat())+aux;
if(!suffix.empty()) name += "."+suffix;
return name;
}
string auxname(string filename, string suffix)
{
return buildname(filename,suffix,"_");
}
sighandler_t Signal(int signum, sighandler_t handler)
{
struct sigaction action,oldaction;
action.sa_handler=handler;
sigemptyset(&action.sa_mask);
action.sa_flags=0;
return sigaction(signum,&action,&oldaction) == 0 ? oldaction.sa_handler :
SIG_ERR;
}
void push_split(mem::vector<string>& a, const string& S)
{
const char *p=S.c_str();
string s;
char c;
while((c=*(p++))) {
if(c == ' ') {
if(s.size() > 0) {
a.push_back(s);
s.clear();
}
} else s += c;
}
if(s.size() > 0)
a.push_back(s);
}
char **args(const mem::vector<string>& s, bool quiet)
{
size_t count=s.size();
char **argv=NULL;
argv=new char*[count+1];
for(size_t i=0; i < count; ++i)
argv[i]=StrdupNoGC(s[i]);
if(!quiet && settings::verbose > 1) {
cerr << argv[0];
for(size_t i=1; i < count; ++i) cerr << " " << argv[i];
cerr << endl;
}
argv[count]=NULL;
return argv;
}
void execError(const char *command, const char *hint, const char *application)
{
cerr << "Cannot execute " << command << endl;
if(*application == 0) application=hint;
if(hint) {
string s=string(hint);
transform(s.begin(), s.end(), s.begin(), toupper);
cerr << "Please put in a file " << getSetting<string>("config")
<< ": " << endl << endl
<< "import settings;" << endl
<< hint << "=\"LOCATION\";" << endl << endl
<< "where LOCATION specifies the location of "
<< application << "." << endl << endl
<< "Alternatively, set the environment variable ASYMPTOTE_" << s
<< endl << "or use the command line option -" << hint
<< "=\"LOCATION\". For further details, see" << endl
<< "https://asymptote.sourceforge.io/doc/Configuring.html" << endl
<< "https://asymptote.sourceforge.io/doc/Search-paths.html" << endl;
}
}
// quiet: 0=none; 1=suppress stdout; 2=suppress stdout+stderr.
int System(const mem::vector<string> &command, int quiet, bool wait,
const char *hint, const char *application, int *ppid)
{
int status;
cout.flush(); // Flush stdout to avoid duplicate output.
char **argv=args(command);
int pid=fork();
if(pid == -1)
camp::reportError("Cannot fork process");
if(pid == 0) {
if(interact::interactive) signal(SIGINT,SIG_IGN);
if(quiet) {
static int null=creat("/dev/null",O_WRONLY);
close(STDOUT_FILENO);
dup2(null,STDOUT_FILENO);
if(quiet == 2) {
close(STDERR_FILENO);
dup2(null,STDERR_FILENO);
}
}
if(argv) {
execvp(argv[0],argv);
execError(argv[0],hint,application);
_exit(-1);
}
}
if(ppid) *ppid=pid;
for(;;) {
if(waitpid(pid, &status, wait ? 0 : WNOHANG) == -1) {
if(errno == ECHILD) return 0;
if(errno != EINTR) {
if(quiet < 2) {
ostringstream msg;
msg << "Command failed: ";
for(size_t i=0; i < command.size(); ++i) msg << command[i] << " ";
camp::reportError(msg);
}
}
} else {
if(!wait) return 0;
if(WIFEXITED(status)) {
if(argv) {
char **p=argv;
char *s;
while((s=*(p++)) != NULL)
delete [] s;
delete [] argv;
}
return WEXITSTATUS(status);
} else {
if(quiet < 2) {
ostringstream msg;
msg << "Command exited abnormally: ";
for(size_t i=0; i < command.size(); ++i) msg << command[i] << " ";
camp::reportError(msg);
}
}
}
}
}
string stripblanklines(const string& s)
{
string S=string(s);
bool blank=true;
const char *t=S.c_str();
size_t len=S.length();
for(size_t i=0; i < len; i++) {
if(t[i] == '\n') {
if(blank) S[i]=' ';
else blank=true;
} else if(t[i] != '\t' && t[i] != ' ') blank=false;
}
return S;
}
char *startpath=NULL;
void noPath()
{
camp::reportError("Cannot get current path");
}
char *getPath(char *p)
{
#ifdef MAXPATHLEN
static size_t size = MAXPATHLEN;
#else
static size_t size = 1024;
#endif
if(!p) p=new(UseGC) char[size];
if(!p) noPath();
else while(getcwd(p,size) == NULL) {
if(errno == ERANGE) {
size *= 2;
p=new(UseGC) char[size];
} else {noPath(); p=NULL;}
}
return p;
}
const char *setPath(const char *s, bool quiet)
{
if(startpath == NULL) startpath=getPath(startpath);
if(s == NULL || *s == 0) s=startpath;
int rc=chdir(s);
if(rc != 0) {
ostringstream buf;
buf << "Cannot change to directory '" << s << "'";
camp::reportError(buf);
}
char *p=getPath();
if(p && (!interact::interactive || quiet) && verbose > 1)
cout << "cd " << p << endl;
return p;
}
void fatal(const char *msg, const char *s=NULL)
{
ostringstream buf;
buf << msg;
if(s) {
buf << " " << getPath();
if(*s) buf << "/";
buf << s;
}
buf << ": " << strerror(errno) << endl;
camp::reportError(buf);
}
void empty_current_dir()
{
static struct stat buf;
DIR *dir=opendir(".");
if(dir == NULL) fatal("Cannot open directory","");
dirent *p;
while((p=readdir(dir)) != NULL) {
if(strcmp(p->d_name,".") == 0 || strcmp(p->d_name,"..") == 0) continue;
if(lstat(p->d_name,&buf) == 0) {
if(S_ISDIR(buf.st_mode)) {
if(chdir(p->d_name)) fatal("Cannot change directory to",p->d_name);
empty_current_dir();
if(chdir(".."))
fatal("Cannot change to parent directory of",p->d_name);
if(rmdir(p->d_name))
fatal("Cannot remove directory",p->d_name);
} else {
if(unlink(p->d_name)) fatal("Cannot remove file",p->d_name);
}
}
}
if(closedir(dir)) fatal("Invalid current directory stream descriptor");
}
void recursive_delete(char *name)
{
static struct stat buf;
if(lstat(name,&buf) == 0) {
if(S_ISDIR(buf.st_mode)) {
const char *path=getPath();
if(chdir(name)) fatal("Cannot change directory to",name);
empty_current_dir();
if(chdir(path)) fatal("Cannot change to directory","");
if(rmdir(name)) fatal("Cannot remove directory", name);
}
else unlink(name);
}
}
void push_command(mem::vector<string>& a, const string& s)
{
a.push_back(s);
#ifdef __MSDOS__
if(s == "cmd") {
a.push_back("/c");
a.push_back("start");
a.push_back("\"\"");
}
#endif
}
void popupHelp() {
// If the popped-up help is already running, pid stores the pid of the viewer.
static int pid=0;
// Status is ignored.
static int status=0;
// If the help viewer isn't running (or its last run has termined), launch the
// viewer again.
if (pid==0 || (waitpid(pid, &status, WNOHANG) == pid)) {
mem::vector<string> cmd;
push_command(cmd,getSetting<string>("pdfviewer"));
string viewerOptions=getSetting<string>("pdfviewerOptions");
if(!viewerOptions.empty())
cmd.push_back(viewerOptions);
cmd.push_back(docdir+dirsep+"asymptote.pdf");
status=System(cmd,0,false,"pdfviewer","your PDF viewer",&pid);
}
}
const char *intrange="integer argument is outside valid range";
const char *uintrange="integer argument is outside valid unsigned range";
unsigned unsignedcast(Int n)
{
if(n < 0 || n/2 > INT_MAX)
vm::error(uintrange);
return (unsigned) n;
}
unsignedInt unsignedIntcast(Int n)
{
if(n < 0)
vm::error(uintrange);
return (unsignedInt) n;
}
int intcast(Int n)
{
if(Abs(n) > INT_MAX)
vm::error(intrange);
return (int) n;
}
Int Intcast(unsignedInt n)
{
if(n > (unsignedInt) Int_MAX)
vm::error(intrange);
return (Int) n;
}
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