Core/Dep: Added libzip which IS needed by G3D

Fixes compile on Windows and Linux (if you didn't have libzip installed for
some reason).

--HG--
branch : trunk

dep/libzip/lib/zip_source_filep.c

@@ -0,0 +1,216 @@
+/*
+  zip_source_filep.c -- create data source from FILE *
+  Copyright (C) 1999-2008 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  The authors can be contacted at <[email protected]>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+  3. The names of the authors may not be used to endorse or promote
+     products derived from this software without specific prior
+     written permission.
+ 
+  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "zipint.h"
+
+struct read_file {
+    char *fname;	/* name of file to copy from */
+    FILE *f;		/* file to copy from */
+    off_t off;		/* start offset of */
+    off_t len;		/* lengt of data to copy */
+    off_t remain;	/* bytes remaining to be copied */
+    int e[2];		/* error codes */
+};
+
+static ssize_t read_file(void *state, void *data, size_t len,
+		     enum zip_source_cmd cmd);
+
+
+
+ZIP_EXTERN struct zip_source *
+zip_source_filep(struct zip *za, FILE *file, off_t start, off_t len)
+{
+    if (za == NULL)
+	return NULL;
+
+    if (file == NULL || start < 0 || len < -1) {
+	_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
+	return NULL;
+    }
+
+    return _zip_source_file_or_p(za, NULL, file, start, len);
+}
+
+
+
+struct zip_source *
+_zip_source_file_or_p(struct zip *za, const char *fname, FILE *file,
+		      off_t start, off_t len)
+{
+    struct read_file *f;
+    struct zip_source *zs;
+
+    if (file == NULL && fname == NULL) {
+	_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
+	return NULL;
+    }
+
+    if ((f=(struct read_file *)malloc(sizeof(struct read_file))) == NULL) {
+	_zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
+	return NULL;
+    }
+
+    f->fname = NULL;
+    if (fname) {
+	if ((f->fname=strdup(fname)) == NULL) {
+	    _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
+	    free(f);
+	    return NULL;
+	}
+    }
+    f->f = file;
+    f->off = start;
+    f->len = (len ? len : -1);
+    
+    if ((zs=zip_source_function(za, read_file, f)) == NULL) {
+	free(f);
+	return NULL;
+    }
+
+    return zs;
+}
+
+
+
+static ssize_t
+read_file(void *state, void *data, size_t len, enum zip_source_cmd cmd)
+{
+    struct read_file *z;
+    char *buf;
+    int i, n;
+
+    z = (struct read_file *)state;
+    buf = (char *)data;
+
+    switch (cmd) {
+    case ZIP_SOURCE_OPEN:
+	if (z->fname) {
+	    if ((z->f=fopen(z->fname, "rb")) == NULL) {
+		z->e[0] = ZIP_ER_OPEN;
+		z->e[1] = errno;
+		return -1;
+	    }
+	}
+
+	if (fseeko(z->f, z->off, SEEK_SET) < 0) {
+	    z->e[0] = ZIP_ER_SEEK;
+	    z->e[1] = errno;
+	    return -1;
+	}
+	z->remain = z->len;
+	return 0;
+	
+    case ZIP_SOURCE_READ:
+	if (z->remain != -1)
+	    n = len > z->remain ? z->remain : len;
+	else
+	    n = len;
+	
+	if ((i=fread(buf, 1, n, z->f)) < 0) {
+	    z->e[0] = ZIP_ER_READ;
+	    z->e[1] = errno;
+	    return -1;
+	}
+
+	if (z->remain != -1)
+	    z->remain -= i;
+
+	return i;
+	
+    case ZIP_SOURCE_CLOSE:
+	if (z->fname) {
+	    fclose(z->f);
+	    z->f = NULL;
+	}
+	return 0;
+
+    case ZIP_SOURCE_STAT:
+        {
+	    struct zip_stat *st;
+	    struct stat fst;
+	    int err;
+	    
+	    if (len < sizeof(*st))
+		return -1;
+
+	    if (z->f)
+		err = fstat(fileno(z->f), &fst);
+	    else
+		err = stat(z->fname, &fst);
+
+	    if (err != 0) {
+		z->e[0] = ZIP_ER_READ; /* best match */
+		z->e[1] = errno;
+		return -1;
+	    }
+
+	    st = (struct zip_stat *)data;
+
+	    zip_stat_init(st);
+	    st->mtime = fst.st_mtime;
+	    if (z->len != -1)
+		st->size = z->len;
+	    else if ((fst.st_mode&S_IFMT) == S_IFREG)
+		st->size = fst.st_size;
+
+	    return sizeof(*st);
+	}
+
+    case ZIP_SOURCE_ERROR:
+	if (len < sizeof(int)*2)
+	    return -1;
+
+	memcpy(data, z->e, sizeof(int)*2);
+	return sizeof(int)*2;
+
+    case ZIP_SOURCE_FREE:
+	free(z->fname);
+	if (z->f)
+	    fclose(z->f);
+	free(z);
+	return 0;
+
+    default:
+	;
+    }
+
+    return -1;
+}