+/* archive.c
+
+ Part of the swftools installer.
+
+ Copyright (c) 2004 Matthias Kramm <kramm@quiss.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#ifdef WIN32
+#include <windows.h>
+#include <shlwapi.h>
+#else
+#include <sys/stat.h>
+#endif
+#include "archive.h"
+#include "../z/zlib.h"
+#define ZLIB_BUFFER_SIZE 16384
+
+static int verbose = 0;
+static void msg(char*format, ...)
+{
+ char buf[1024];
+ int l;
+ va_list arglist;
+ if(!verbose)
+ return;
+ va_start(arglist, format);
+ vsprintf(buf, format, arglist);
+ va_end(arglist);
+ l = strlen(buf);
+ while(l && buf[l-1]=='\n') {
+ buf[l-1] = 0;
+ l--;
+ }
+ printf("(archive) %s\n", buf);
+ fflush(stdout);
+}
+
+
+typedef struct _reader
+{
+ int (*read)(struct _reader*, void*data, int len);
+ void (*dealloc)(struct _reader*);
+ void *internal;
+ int pos;
+} reader_t;
+
+/* ---------------------------- mem reader ------------------------------- */
+
+struct memread_t
+{
+ unsigned char*data;
+ int length;
+};
+static int reader_memread(reader_t*reader, void* data, int _len)
+{
+ struct memread_t*mr = (struct memread_t*)reader->internal;
+
+ int len = _len;
+ if(mr->length - reader->pos < len) {
+ len = mr->length - reader->pos;
+ }
+ memcpy(data, &mr->data[reader->pos], len);
+ msg("at pos %d, asked to read %d bytes, did read %d bytes\n", reader->pos, _len, len);
+ reader->pos += len;
+ return len;
+}
+static void reader_memread_dealloc(reader_t*reader)
+{
+ if(reader->internal)
+ free(reader->internal);
+ memset(reader, 0, sizeof(reader_t));
+}
+reader_t*reader_init_memreader(void*newdata, int newlength)
+{
+ reader_t*r = malloc(sizeof(reader_t));
+ struct memread_t*mr = (struct memread_t*)malloc(sizeof(struct memread_t));
+ mr->data = (unsigned char*)newdata;
+ mr->length = newlength;
+ r->read = reader_memread;
+ r->dealloc = reader_memread_dealloc;
+ r->internal = (void*)mr;
+ r->pos = 0;
+ return r;
+}
+
+
+/* ---------------------------- zlibinflate reader -------------------------- */
+struct zlibinflate_t
+{
+ z_stream zs;
+ reader_t*input;
+ unsigned char readbuffer[ZLIB_BUFFER_SIZE];
+};
+
+static void zlib_error(int ret, char* msg, z_stream*zs)
+{
+ fprintf(stderr, "%s: zlib error (%d): last zlib error: %s\n", msg, ret, zs->msg?zs->msg:"unknown");
+ perror("errno:");
+ exit(1);
+}
+
+static int reader_zlibinflate(reader_t*reader, void* data, int len)
+{
+ struct zlibinflate_t*z = (struct zlibinflate_t*)reader->internal;
+ int ret;
+ if(!z) {
+ return 0;
+ }
+ if(!len)
+ return 0;
+
+ z->zs.next_out = (Bytef *)data;
+ z->zs.avail_out = len;
+
+ while(1) {
+ if(!z->zs.avail_in) {
+ z->zs.avail_in = z->input->read(z->input, z->readbuffer, ZLIB_BUFFER_SIZE);
+ z->zs.next_in = z->readbuffer;
+ }
+ if(z->zs.avail_in)
+ ret = inflate(&z->zs, Z_NO_FLUSH);
+ else
+ ret = inflate(&z->zs, Z_FINISH);
+
+ if (ret != Z_OK &&
+ ret != Z_STREAM_END) zlib_error(ret, "bitio:inflate_inflate", &z->zs);
+
+ if (ret == Z_STREAM_END) {
+ int pos = z->zs.next_out - (Bytef*)data;
+ ret = inflateEnd(&z->zs);
+ if (ret != Z_OK) zlib_error(ret, "bitio:inflate_end", &z->zs);
+ free(reader->internal);
+ reader->internal = 0;
+ reader->pos += pos;
+ return pos;
+ }
+ if(!z->zs.avail_out) {
+ break;
+ }
+ }
+ reader->pos += len;
+ return len;
+}
+static void reader_zlibinflate_dealloc(reader_t*reader)
+{
+ struct zlibinflate_t*z = (struct zlibinflate_t*)reader->internal;
+ if(z) {
+ if(z->input) {
+ z->input->dealloc(z->input);z->input = 0;
+ }
+ inflateEnd(&z->zs);
+ free(reader->internal);
+ }
+ memset(reader, 0, sizeof(reader_t));
+}
+reader_t* reader_init_zlibinflate(reader_t*input)
+{
+ reader_t*r = malloc(sizeof(reader_t));
+ struct zlibinflate_t*z;
+ int ret;
+ memset(r, 0, sizeof(reader_t));
+ z = (struct zlibinflate_t*)malloc(sizeof(struct zlibinflate_t));
+ memset(z, 0, sizeof(struct zlibinflate_t));
+ r->internal = z;
+ r->read = reader_zlibinflate;
+ r->dealloc = reader_zlibinflate_dealloc;
+ r->pos = 0;
+ z->input = input;
+ memset(&z->zs,0,sizeof(z_stream));
+ z->zs.zalloc = Z_NULL;
+ z->zs.zfree = Z_NULL;
+ z->zs.opaque = Z_NULL;
+ ret = inflateInit(&z->zs);
+ if (ret != Z_OK) zlib_error(ret, "bitio:inflate_init", &z->zs);
+ return r;
+}
+
+/* -------------------------------------------------------------------------- */
+
+
+static int create_directory(char*path,statusfunc_t f)
+{
+ if(!path || !*path || (*path=='.' && (!path[1] || path[1]=='.')))
+ return 1; //nothing to do
+ while(path[0]=='.' && (path[1]=='/' || path[1]=='\\'))
+ path+=2;
+
+#ifdef WIN32
+ if(PathIsDirectoryA(path))
+ return 1;
+#else
+ struct stat st;
+ if(stat(path, &st)>=0) {
+ if(S_ISDIR(st.st_mode)) {
+ return 1; /* already exists */
+ }
+ }
+#endif
+
+ if(mkdir(path,0755)<0) {
+ perror("mkdir");
+ char buf[1024];
+ sprintf(buf, "create directory \"%s\" FAILED", path);
+ f(-1, buf);
+ return 0;
+ }
+ return 1;
+}
+static int goto_directory(char*path,statusfunc_t f)
+{
+ if(chdir(path)<0) {
+ char buf[1024];
+ sprintf(buf, "changing to directory \"%s\" FAILED", path);
+ f(-1, buf);
+ return 0;
+ }
+ return 1;
+}
+static char basenamebuf[256];
+static char*get_directory(char*filename)
+{
+ char*r1 = strrchr(filename, '\\');
+ char*r2 = strrchr(filename, '/');
+ char*r = r1>r2?r1:r2;
+ if(!r)
+ return "";
+ memcpy(basenamebuf, filename, r-filename);
+ basenamebuf[r-filename] = 0;
+ //msg("directory name of \"%s\" is \"%s\"", filename, basenamebuf);
+ return basenamebuf;
+}
+static int write_file(char*filename, reader_t*r, int len,statusfunc_t f)
+{
+ while(filename[0]=='.' && (filename[1]=='/' || filename[1]=='\\'))
+ filename+=2;
+
+ filename=strdup(filename);
+
+ char*p = filename;
+ while(*p) {
+ if(*p=='/') *p='\\';
+ p++;
+ }
+
+ msg("create file \"%s\" (%d bytes)", filename, len);
+ FILE*fo = fopen(filename, "wb");
+
+ if(!fo) {
+ char buf[1024];
+ sprintf(buf, "Couldn't create file %s", filename);
+ f(-1, buf);
+ free(filename);
+ return 0;
+ }
+ int pos=0;
+ char buf[4096];
+ while(pos<len) {
+ int l = 4096;
+ if(pos+l>len)
+ l = len-pos;
+ int n = r->read(r, buf, l);
+ if(n < l) {
+ char buf[1024];
+ sprintf(buf, "Couldn't read byte %d (pos+%d) from input buffer for file %s", pos+n, n, filename);
+ f(-1, buf);
+ return 0;
+ }
+ fwrite(buf, l, 1, fo);
+ pos+=l;
+ }
+ fclose(fo);
+ free(filename);
+ return 1;
+}
+
+int unpack_archive(void*data, int len, char*destdir, statusfunc_t f)
+{
+ reader_t*m = reader_init_memreader(data, len);
+ reader_t*z = reader_init_zlibinflate(m);
+
+ f(0, "Creating installation directory");
+ if(!create_directory(destdir,f)) return 0;
+ f(0, "Changing to installation directory");
+ if(!goto_directory(destdir,f)) return 0;
+
+ f(0, "Uncompressing files...");
+ while(1) {
+ /* read id */
+ unsigned char id[4];
+ id[3] = 0;
+ if(z->read(z, id, 3)<3) {
+ f(-1, "Unexpected end of archive");
+ return 0;
+ }
+ if(!strcmp(id, "END"))
+ break;
+
+ unsigned b1=0,b2=0,b3=0,b4=0;
+ int l = 0;
+ l+=z->read(z, &b1, 1);
+ l+=z->read(z, &b2, 1);
+ l+=z->read(z, &b3, 1);
+ l+=z->read(z, &b4, 1);
+ if(l<4)
+ return 0;
+
+ /* read size */
+ int len = b1|b2<<8|b3<<16|b4<<24;
+
+ /* read filename */
+ unsigned char filename_len;
+ z->read(z, &filename_len, 1);
+ char*filename = malloc(filename_len+1);
+ z->read(z, filename, filename_len);
+ filename[(int)filename_len] = 0;
+
+ if(verbose) printf("[%s] %s %d\n", id, filename, len);
+ char buf[2048];
+ sprintf(buf, "[%s] %s (%d bytes)", id, filename, len);
+ f(0, buf);
+ if(!strcmp(id, "DIR")) {
+ if(!create_directory(filename,f)) return 0;
+ } else {
+ if(!create_directory(get_directory(filename),f)) return 0;
+
+ if(!write_file(filename,z,len,f)) return 0;
+ }
+ }
+ f(0, "Finishing Installation");
+ return 1;
+}
+
git.asbjorn.biz / swftools.git / blobdiff