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** General Public License version 2.1 as published by the Free Software

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****************************************************************************/

#include "makefiledeps.h"

#include "option.h"

#include <qdir.h>

#include <qdatetime.h>

#include <qfileinfo.h>

#include <qbuffer.h>

#include <qplatformdefs.h>

#if defined(Q_OS_UNIX)

# include <unistd.h>

#else

# include <io.h>

#endif

#include <qdebug.h>

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <fcntl.h>

#include <sys/types.h>

#include <sys/stat.h>

#if defined(_MSC_VER) && _MSC_VER >= 1400

#include <share.h>

#endif

QT_BEGIN_NAMESPACE

#if 1

#define qmake_endOfLine(c) (c == '\r' || c == '\n')

#else

inline bool qmake_endOfLine(const char &c) { return (c == '\r' || c == '\n'); }

#endif

//#define QMAKE_USE_CACHE

QMakeLocalFileName::QMakeLocalFileName(const QString &name) : is_null(name.isNull())

{

    if(!name.isEmpty()) {

        if(name.at(0) == QLatin1Char('"') && name.at(name.length()-2) == QLatin1Char('"'))

            real_name = name.mid(1, name.length()-2);

        else

            real_name = name;

    }

}

const QString

&QMakeLocalFileName::local() const

{

    if(!is_null && local_name.isNull())

        local_name = Option::fixPathToLocalOS(real_name, true);

    return local_name;

}

struct SourceDependChildren;

struct SourceFile {

    SourceFile() : deps(0), type(QMakeSourceFileInfo::TYPE_UNKNOWN),

                   mocable(0), traversed(0), exists(1),

                   moc_checked(0), dep_checked(0), included_count(0) { }

    ~SourceFile();

    QMakeLocalFileName file;

    SourceDependChildren *deps;

    QMakeSourceFileInfo::SourceFileType type;

    uint mocable : 1, traversed : 1, exists : 1;

    uint moc_checked : 1,  dep_checked : 1;

    uchar included_count;

};

struct SourceDependChildren {

    SourceFile **children;

    int num_nodes, used_nodes;

    SourceDependChildren() : children(0), num_nodes(0), used_nodes(0) { }

    ~SourceDependChildren() { if(children) free(children); children = 0; }

    void addChild(SourceFile *s) {

        if(num_nodes <= used_nodes) {

            num_nodes += 200;

            children = (SourceFile**)realloc(children, sizeof(SourceFile*)*(num_nodes));

        }

        children[used_nodes++] = s;

    }

};

SourceFile::~SourceFile() { delete deps; }

class SourceFiles {

    int hash(const char *);

public:

    SourceFiles();

    ~SourceFiles();

    SourceFile *lookupFile(const char *);

    inline SourceFile *lookupFile(const QString &f) { return lookupFile(f.toLatin1().constData()); }

    inline SourceFile *lookupFile(const QMakeLocalFileName &f) { return lookupFile(f.local().toLatin1().constData()); }

    void addFile(SourceFile *, const char *k=0, bool own=true);

    struct SourceFileNode {

        SourceFileNode() : key(0), next(0), file(0), own_file(1) { }

        ~SourceFileNode() {

            delete [] key;

            if(own_file)

                delete file;

        }

        char *key;

        SourceFileNode *next;

        SourceFile *file;

        uint own_file : 1;

    } **nodes;

    int num_nodes;

};

SourceFiles::SourceFiles()

{

    nodes = (SourceFileNode**)malloc(sizeof(SourceFileNode*)*(num_nodes=3037));

    for(int n = 0; n < num_nodes; n++)

        nodes[n] = 0;

}

SourceFiles::~SourceFiles()

{

    for(int n = 0; n < num_nodes; n++) {

        for(SourceFileNode *next = nodes[n]; next;) {

            SourceFileNode *next_next = next->next;

            delete next;

            next = next_next;

        }

    }

    free(nodes);

}

int SourceFiles::hash(const char *file)

{

    uint h = 0, g;

    while (*file) {

        h = (h << 4) + *file;

        if ((g = (h & 0xf0000000)) != 0)

            h ^= g >> 23;

        h &= ~g;

        file++;

    }

    return h;

}

SourceFile *SourceFiles::lookupFile(const char *file)

{

    int h = hash(file) % num_nodes;

    for(SourceFileNode *p = nodes[h]; p; p = p->next) {

        if(!strcmp(p->key, file))

            return p->file;

    }

    return 0;

}

void SourceFiles::addFile(SourceFile *p, const char *k, bool own_file)

{

    QByteArray ba = p->file.local().toLatin1();

    if(!k)

        k = ba;

    int h = hash(k) % num_nodes;

    SourceFileNode *pn = new SourceFileNode;

    pn->own_file = own_file;

    pn->key = qstrdup(k);

    pn->file = p;

    pn->next = nodes[h];

    nodes[h] = pn;

}

void QMakeSourceFileInfo::dependTreeWalker(SourceFile *node, SourceDependChildren *place)

{

    if(node->traversed || !node->exists)

        return;

    place->addChild(node);

    node->traversed = true; //set flag

    if(node->deps) {

        for(int i = 0; i < node->deps->used_nodes; i++)

            dependTreeWalker(node->deps->children[i], place);

    }

}

void QMakeSourceFileInfo::setDependencyPaths(const QList<QMakeLocalFileName> &l)

{

    // Ensure that depdirs does not contain the same paths several times, to minimize the stats

    QList<QMakeLocalFileName> ll;

    for (int i = 0; i < l.count(); ++i) {

        if (!ll.contains(l.at(i)))

            ll.append(l.at(i));

    }

    depdirs = ll;

}

QStringList QMakeSourceFileInfo::dependencies(const QString &file)

{

    QStringList ret;

    if(!files)

        return ret;

    if(SourceFile *node = files->lookupFile(QMakeLocalFileName(file))) {

        if(node->deps) {

            /* I stick them into a SourceDependChildren here because it is faster to just

               iterate over the list to stick them in the list, and reset the flag, then it is

               to loop over the tree (about 50% faster I saw) --Sam */

            SourceDependChildren place;

            for(int i = 0; i < node->deps->used_nodes; i++)

                dependTreeWalker(node->deps->children[i], &place);

            if(place.children) {

                for(int i = 0; i < place.used_nodes; i++) {

                    place.children[i]->traversed = false; //reset flag

                    ret.append(place.children[i]->file.real());

                }

           }

       }

    }

    return ret;

}

int

QMakeSourceFileInfo::included(const QString &file)

{

    if (!files)

        return 0;

    if(SourceFile *node = files->lookupFile(QMakeLocalFileName(file)))

        return node->included_count;

    return 0;

}

bool QMakeSourceFileInfo::mocable(const QString &file)

{

    if(SourceFile *node = files->lookupFile(QMakeLocalFileName(file)))

        return node->mocable;

    return false;

}

QMakeSourceFileInfo::QMakeSourceFileInfo(const QString &cf)

{

    //dep_mode

    dep_mode = Recursive;

    //quick project lookups

    includes = files = 0;

    files_changed = false;

    //buffer

    spare_buffer = 0;

    spare_buffer_size = 0;

    //cache

    cachefile = cf;

    if(!cachefile.isEmpty())

        loadCache(cachefile);

}

QMakeSourceFileInfo::~QMakeSourceFileInfo()

{

    //cache

    if(!cachefile.isEmpty() /*&& files_changed*/)

        saveCache(cachefile);

    //buffer

    if(spare_buffer) {

        free(spare_buffer);

        spare_buffer = 0;

        spare_buffer_size = 0;

    }

    //quick project lookup

    delete files;

    delete includes;

}

void QMakeSourceFileInfo::setCacheFile(const QString &cf)

{

    cachefile = cf;

    loadCache(cachefile);

}

void QMakeSourceFileInfo::addSourceFiles(const QStringList &l, uchar seek,

                                         QMakeSourceFileInfo::SourceFileType type)

{

    for(int i=0; i<l.size(); ++i)

        addSourceFile(l.at(i), seek, type);

}

void QMakeSourceFileInfo::addSourceFile(const QString &f, uchar seek,

                                        QMakeSourceFileInfo::SourceFileType type)

{

    if(!files)

        files = new SourceFiles;

    QMakeLocalFileName fn(f);

    SourceFile *file = files->lookupFile(fn);

    if(!file) {

        file = new SourceFile;

        file->file = fn;

        files->addFile(file);

    } else {

        if(file->type != type && file->type != TYPE_UNKNOWN && type != TYPE_UNKNOWN)

            warn_msg(WarnLogic, "%s is marked as %d, then %d!", f.toLatin1().constData(),

                     file->type, type);

    }

    if(type != TYPE_UNKNOWN)

        file->type = type;

    if(seek & SEEK_MOCS && !file->moc_checked)

        findMocs(file);

    if(seek & SEEK_DEPS && !file->dep_checked)

        findDeps(file);

}

bool QMakeSourceFileInfo::containsSourceFile(const QString &f, SourceFileType type)

{

    if(SourceFile *file = files->lookupFile(QMakeLocalFileName(f)))

        return (file->type == type || file->type == TYPE_UNKNOWN || type == TYPE_UNKNOWN);

    return false;

}

char *QMakeSourceFileInfo::getBuffer(int s) {

    if(!spare_buffer || spare_buffer_size < s)

        spare_buffer = (char *)realloc(spare_buffer, spare_buffer_size=s);

    return spare_buffer;

}

#ifndef S_ISDIR

#define S_ISDIR(x) (x & _S_IFDIR)

#endif

QMakeLocalFileName QMakeSourceFileInfo::fixPathForFile(const QMakeLocalFileName &f, bool)

{

    return f;

}

QMakeLocalFileName QMakeSourceFileInfo::findFileForDep(const QMakeLocalFileName &/*dep*/,

                                                       const QMakeLocalFileName &/*file*/)

{

    return QMakeLocalFileName();

}

QFileInfo QMakeSourceFileInfo::findFileInfo(const QMakeLocalFileName &dep)

{

    return QFileInfo(dep.real());

}

bool QMakeSourceFileInfo::findDeps(SourceFile *file)

{

    if(file->dep_checked || file->type == TYPE_UNKNOWN)

        return true;

    files_changed = true;

    file->dep_checked = true;

    const QMakeLocalFileName sourceFile = fixPathForFile(file->file, true);

    struct stat fst;

    char *buffer = 0;

    int buffer_len = 0;

    {

        int fd;

#if defined(_MSC_VER) && _MSC_VER >= 1400

        if (_sopen_s(&fd, sourceFile.local().toLatin1().constData(),

            _O_RDONLY, _SH_DENYNO, _S_IREAD) != 0)

            fd = -1;

#else

        fd = open(sourceFile.local().toLatin1().constData(), O_RDONLY);

#endif

        if(fd == -1 || fstat(fd, &fst) || S_ISDIR(fst.st_mode))

            return false;

        buffer = getBuffer(fst.st_size);

        for(int have_read = 0;

            (have_read = QT_READ(fd, buffer + buffer_len, fst.st_size - buffer_len));

            buffer_len += have_read) ;

        QT_CLOSE(fd);

    }

    if(!buffer)

        return false;

    if(!file->deps)

        file->deps = new SourceDependChildren;

    int line_count = 1;

    for(int x = 0; x < buffer_len; ++x) {

        bool try_local = true;

        char *inc = 0;

        if(file->type == QMakeSourceFileInfo::TYPE_UI) {

            // skip whitespaces

            while(x < buffer_len && (*(buffer+x) == ' ' || *(buffer+x) == '\t'))

                ++x;

            if(*(buffer + x) == '<') {

                ++x;

                if(buffer_len >= x + 12 && !strncmp(buffer + x, "includehint", 11) &&

                   (*(buffer + x + 11) == ' ' || *(buffer + x + 11) == '>')) {

                    for(x += 11; *(buffer + x) != '>'; ++x) ;

                    int inc_len = 0;

                    for(x += 1 ; *(buffer + x + inc_len) != '<'; ++inc_len) ;

                    *(buffer + x + inc_len) = '\0';

                    inc = buffer + x;

                } else if(buffer_len >= x + 13 && !strncmp(buffer + x, "customwidget", 12) &&

                          (*(buffer + x + 12) == ' ' || *(buffer + x + 12) == '>')) {

                    for(x += 13; *(buffer + x) != '>'; ++x) ; //skip up to >

                    while(x < buffer_len) {

                        for(x++; *(buffer + x) != '<'; ++x) ; //skip up to <

                        x++;

                        if(buffer_len >= x + 7 && !strncmp(buffer+x, "header", 6) &&

                           (*(buffer + x + 6) == ' ' || *(buffer + x + 6) == '>')) {

                            for(x += 7; *(buffer + x) != '>'; ++x) ; //skip up to >

                            int inc_len = 0;

                            for(x += 1 ; *(buffer + x + inc_len) != '<'; ++inc_len) ;

                            *(buffer + x + inc_len) = '\0';

                            inc = buffer + x;

                            break;

                        } else if(buffer_len >= x + 14 && !strncmp(buffer+x, "/customwidget", 13) &&

                                  (*(buffer + x + 13) == ' ' || *(buffer + x + 13) == '>')) {

                            x += 14;

                            break;

                        }

                    }

                } else if(buffer_len >= x + 8 && !strncmp(buffer + x, "include", 7) &&

                          (*(buffer + x + 7) == ' ' || *(buffer + x + 7) == '>')) {

                    for(x += 8; *(buffer + x) != '>'; ++x) {

                        if(buffer_len >= x + 9 && *(buffer + x) == 'i' &&

                           !strncmp(buffer + x, "impldecl", 8)) {

                            for(x += 8; *(buffer + x) != '='; ++x) ;

                            if(*(buffer + x) != '=')

                                continue;

                            for(++x; *(buffer+x) == '\t' || *(buffer+x) == ' '; ++x) ;

                            char quote = 0;

                            if(*(buffer+x) == '\'' || *(buffer+x) == '"') {

                                quote = *(buffer + x);

                                ++x;

                            }

                            int val_len;

                            for(val_len = 0; true; ++val_len) {

                                if(quote) {

                                    if(*(buffer+x+val_len) == quote)

                                        break;

                                } else if(*(buffer + x + val_len) == '>' ||

                                          *(buffer + x + val_len) == ' ') {

                                    break;

                                }

                            }

//?                            char saved = *(buffer + x + val_len);

                            *(buffer + x + val_len) = '\0';

                            if(!strcmp(buffer+x, "in implementation")) {

                                //### do this

                            }

                        }

                    }

                    int inc_len = 0;

                    for(x += 1 ; *(buffer + x + inc_len) != '<'; ++inc_len) ;

                    *(buffer + x + inc_len) = '\0';

                    inc = buffer + x;

                }

            }

            //read past new line now..

            for(; x < buffer_len && !qmake_endOfLine(*(buffer + x)); ++x) ;

            ++line_count;

        } else if(file->type == QMakeSourceFileInfo::TYPE_QRC) {

        } else if(file->type == QMakeSourceFileInfo::TYPE_C) {

            for(int beginning=1; x < buffer_len; ++x) {

                // whitespace comments and line-endings

                for(; x < buffer_len; ++x) {

                    if(*(buffer+x) == ' ' || *(buffer+x) == '\t') {

                        // keep going

                    } else if(*(buffer+x) == '/') {

                        ++x;

                        if(buffer_len >= x) {

                            if(*(buffer+x) == '/') { //c++ style comment

                                for(; x < buffer_len && !qmake_endOfLine(*(buffer + x)); ++x) ;

                                beginning = 1;

                            } else if(*(buffer+x) == '*') { //c style comment

                                for(++x; x < buffer_len; ++x) {

                                    if(*(buffer+x) == '*') {

                                        if(x < buffer_len-1 && *(buffer + (x+1)) == '/') {

                                            ++x;

                                            break;

                                        }

                                    } else if(qmake_endOfLine(*(buffer+x))) {

                                        ++line_count;

                                    }

                                }

                            }

                        }

                    } else if(qmake_endOfLine(*(buffer+x))) {

                        ++line_count;

                        beginning = 1;

                    } else {

                        break;

                    }

                }

                if(x >= buffer_len)

                    break;

                // preprocessor directive

                if(beginning && *(buffer+x) == '#')

                    break;