zlib: update to 1.2.11

1 files changed, 462 insertions, 459 deletions

diff --git a/libs/zlib/src/gzlib.c b/libs/zlib/src/gzlib.c
index 775af2f3c9..4105e6aff9 100644
--- a/libs/zlib/src/gzlib.c
+++ b/libs/zlib/src/gzlib.c
@@ -1,11 +1,11 @@
 /* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 #include "gzguts.h"
 
-#if defined(_WIN32) && !defined(__BORLANDC__)
+#if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__)
 #  define LSEEK _lseeki64
 #else
 #if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
@@ -73,562 +73,565 @@ char ZLIB_INTERNAL *gz_strwinerror (error)
 
 /* Reset gzip file state */
 local void gz_reset(state)
-gz_statep state;
+    gz_statep state;
 {
-	state->x.have = 0;              /* no output data available */
-	if (state->mode == GZ_READ) {   /* for reading ... */
-		state->eof = 0;             /* not at end of file */
-		state->past = 0;            /* have not read past end yet */
-		state->how = LOOK;          /* look for gzip header */
-	}
-	state->seek = 0;                /* no seek request pending */
-	gz_error(state, Z_OK, NULL);    /* clear error */
-	state->x.pos = 0;               /* no uncompressed data yet */
-	state->strm.avail_in = 0;       /* no input data yet */
+    state->x.have = 0;              /* no output data available */
+    if (state->mode == GZ_READ) {   /* for reading ... */
+        state->eof = 0;             /* not at end of file */
+        state->past = 0;            /* have not read past end yet */
+        state->how = LOOK;          /* look for gzip header */
+    }
+    state->seek = 0;                /* no seek request pending */
+    gz_error(state, Z_OK, NULL);    /* clear error */
+    state->x.pos = 0;               /* no uncompressed data yet */
+    state->strm.avail_in = 0;       /* no input data yet */
 }
 
 /* Open a gzip file either by name or file descriptor. */
 local gzFile gz_open(path, fd, mode)
-const void *path;
-int fd;
-const char *mode;
+    const void *path;
+    int fd;
+    const char *mode;
 {
-	gz_statep state;
-	size_t len;
-	int oflag;
-	#ifdef O_CLOEXEC
-	int cloexec = 0;
-	#endif
-	#ifdef O_EXCL
-	int exclusive = 0;
-	#endif
-
-	/* check input */
-	if (path == NULL)
-		return NULL;
-
-	/* allocate gzFile structure to return */
-	state = (gz_statep)malloc(sizeof(gz_state));
-	if (state == NULL)
-		return NULL;
-	state->size = 0;            /* no buffers allocated yet */
-	state->want = GZBUFSIZE;    /* requested buffer size */
-	state->msg = NULL;          /* no error message yet */
-
-	/* interpret mode */
-	state->mode = GZ_NONE;
-	state->level = Z_DEFAULT_COMPRESSION;
-	state->strategy = Z_DEFAULT_STRATEGY;
-	state->direct = 0;
-	while (*mode) {
-		if (*mode >= '0' && *mode <= '9')
-			state->level = *mode - '0';
-		else
-			switch (*mode) {
-			case 'r':
-				state->mode = GZ_READ;
-				break;
-				#ifndef NO_GZCOMPRESS
-			case 'w':
-				state->mode = GZ_WRITE;
-				break;
-			case 'a':
-				state->mode = GZ_APPEND;
-				break;
-				#endif
-			case '+':       /* can't read and write at the same time */
-				free(state);
-				return NULL;
-			case 'b':       /* ignore -- will request binary anyway */
-				break;
-				#ifdef O_CLOEXEC
-			case 'e':
-				cloexec = 1;
-				break;
-				#endif
-				#ifdef O_EXCL
-			case 'x':
-				exclusive = 1;
-				break;
-				#endif
-			case 'f':
-				state->strategy = Z_FILTERED;
-				break;
-			case 'h':
-				state->strategy = Z_HUFFMAN_ONLY;
-				break;
-			case 'R':
-				state->strategy = Z_RLE;
-				break;
-			case 'F':
-				state->strategy = Z_FIXED;
-				break;
-			case 'T':
-				state->direct = 1;
-				break;
-			default:        /* could consider as an error, but just ignore */
-				;
-			}
-		mode++;
-	}
-
-	/* must provide an "r", "w", or "a" */
-	if (state->mode == GZ_NONE) {
-		free(state);
-		return NULL;
-	}
-
-	/* can't force transparent read */
-	if (state->mode == GZ_READ) {
-		if (state->direct) {
-			free(state);
-			return NULL;
-		}
-		state->direct = 1;      /* for empty file */
-	}
-
-	/* save the path name for error messages */
-	#ifdef _WIN32
-	if (fd == -2) {
-		len = wcstombs(NULL, path, 0);
-		if (len == (size_t)-1)
-			len = 0;
-	}
-	else
-		#endif
-		len = strlen((const char *)path);
-	state->path = (char *)malloc(len + 1);
-	if (state->path == NULL) {
-		free(state);
-		return NULL;
-	}
-	#ifdef _WIN32
-	if (fd == -2)
-		if (len)
-			wcstombs(state->path, path, len + 1);
-		else
-			*(state->path) = 0;
-	else
-		#endif
-		#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
-		snprintf(state->path, len + 1, "%s", (const char *)path);
-	#else
-		strcpy(state->path, path);
-	#endif
-
-	/* compute the flags for open() */
-	oflag =
-		#ifdef O_LARGEFILE
-		O_LARGEFILE |
-		#endif
-		#ifdef O_BINARY
-		O_BINARY |
-		#endif
-		#ifdef O_CLOEXEC
-		(cloexec ? O_CLOEXEC : 0) |
-		#endif
-		(state->mode == GZ_READ ?
-			O_RDONLY :
-			(O_WRONLY | O_CREAT |
-				#ifdef O_EXCL
-				(exclusive ? O_EXCL : 0) |
-				#endif
-				(state->mode == GZ_WRITE ?
-					O_TRUNC :
-					O_APPEND)));
-
-	/* open the file with the appropriate flags (or just use fd) */
-	state->fd = fd > -1 ? fd : (
-		#ifdef _WIN32
-		fd == -2 ? _wopen(path, oflag, 0666) :
-		#endif
-		open((const char *)path, oflag, 0666));
-	if (state->fd == -1) {
-		free(state->path);
-		free(state);
-		return NULL;
-	}
-	if (state->mode == GZ_APPEND)
-		state->mode = GZ_WRITE;         /* simplify later checks */
-
-  /* save the current position for rewinding (only if reading) */
-	if (state->mode == GZ_READ) {
-		state->start = LSEEK(state->fd, 0, SEEK_CUR);
-		if (state->start == -1) state->start = 0;
-	}
-
-	/* initialize stream */
-	gz_reset(state);
-
-	/* return stream */
-	return (gzFile)state;
+    gz_statep state;
+    z_size_t len;
+    int oflag;
+#ifdef O_CLOEXEC
+    int cloexec = 0;
+#endif
+#ifdef O_EXCL
+    int exclusive = 0;
+#endif
+
+    /* check input */
+    if (path == NULL)
+        return NULL;
+
+    /* allocate gzFile structure to return */
+    state = (gz_statep)malloc(sizeof(gz_state));
+    if (state == NULL)
+        return NULL;
+    state->size = 0;            /* no buffers allocated yet */
+    state->want = GZBUFSIZE;    /* requested buffer size */
+    state->msg = NULL;          /* no error message yet */
+
+    /* interpret mode */
+    state->mode = GZ_NONE;
+    state->level = Z_DEFAULT_COMPRESSION;
+    state->strategy = Z_DEFAULT_STRATEGY;
+    state->direct = 0;
+    while (*mode) {
+        if (*mode >= '0' && *mode <= '9')
+            state->level = *mode - '0';
+        else
+            switch (*mode) {
+            case 'r':
+                state->mode = GZ_READ;
+                break;
+#ifndef NO_GZCOMPRESS
+            case 'w':
+                state->mode = GZ_WRITE;
+                break;
+            case 'a':
+                state->mode = GZ_APPEND;
+                break;
+#endif
+            case '+':       /* can't read and write at the same time */
+                free(state);
+                return NULL;
+            case 'b':       /* ignore -- will request binary anyway */
+                break;
+#ifdef O_CLOEXEC
+            case 'e':
+                cloexec = 1;
+                break;
+#endif
+#ifdef O_EXCL
+            case 'x':
+                exclusive = 1;
+                break;
+#endif
+            case 'f':
+                state->strategy = Z_FILTERED;
+                break;
+            case 'h':
+                state->strategy = Z_HUFFMAN_ONLY;
+                break;
+            case 'R':
+                state->strategy = Z_RLE;
+                break;
+            case 'F':
+                state->strategy = Z_FIXED;
+                break;
+            case 'T':
+                state->direct = 1;
+                break;
+            default:        /* could consider as an error, but just ignore */
+                ;
+            }
+        mode++;
+    }
+
+    /* must provide an "r", "w", or "a" */
+    if (state->mode == GZ_NONE) {
+        free(state);
+        return NULL;
+    }
+
+    /* can't force transparent read */
+    if (state->mode == GZ_READ) {
+        if (state->direct) {
+            free(state);
+            return NULL;
+        }
+        state->direct = 1;      /* for empty file */
+    }
+
+    /* save the path name for error messages */
+#ifdef WIDECHAR
+    if (fd == -2) {
+        len = wcstombs(NULL, path, 0);
+        if (len == (z_size_t)-1)
+            len = 0;
+    }
+    else
+#endif
+        len = strlen((const char *)path);
+    state->path = (char *)malloc(len + 1);
+    if (state->path == NULL) {
+        free(state);
+        return NULL;
+    }
+#ifdef WIDECHAR
+    if (fd == -2)
+        if (len)
+            wcstombs(state->path, path, len + 1);
+        else
+            *(state->path) = 0;
+    else
+#endif
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+        (void)snprintf(state->path, len + 1, "%s", (const char *)path);
+#else
+        strcpy(state->path, path);
+#endif
+
+    /* compute the flags for open() */
+    oflag =
+#ifdef O_LARGEFILE
+        O_LARGEFILE |
+#endif
+#ifdef O_BINARY
+        O_BINARY |
+#endif
+#ifdef O_CLOEXEC
+        (cloexec ? O_CLOEXEC : 0) |
+#endif
+        (state->mode == GZ_READ ?
+         O_RDONLY :
+         (O_WRONLY | O_CREAT |
+#ifdef O_EXCL
+          (exclusive ? O_EXCL : 0) |
+#endif
+          (state->mode == GZ_WRITE ?
+           O_TRUNC :
+           O_APPEND)));
+
+    /* open the file with the appropriate flags (or just use fd) */
+    state->fd = fd > -1 ? fd : (
+#ifdef WIDECHAR
+        fd == -2 ? _wopen(path, oflag, 0666) :
+#endif
+        open((const char *)path, oflag, 0666));
+    if (state->fd == -1) {
+        free(state->path);
+        free(state);
+        return NULL;
+    }
+    if (state->mode == GZ_APPEND) {
+        LSEEK(state->fd, 0, SEEK_END);  /* so gzoffset() is correct */
+        state->mode = GZ_WRITE;         /* simplify later checks */
+    }
+
+    /* save the current position for rewinding (only if reading) */
+    if (state->mode == GZ_READ) {
+        state->start = LSEEK(state->fd, 0, SEEK_CUR);
+        if (state->start == -1) state->start = 0;
+    }
+
+    /* initialize stream */
+    gz_reset(state);
+
+    /* return stream */
+    return (gzFile)state;
 }
 
 /* -- see zlib.h -- */
 gzFile ZEXPORT gzopen(path, mode)
-const char *path;
-const char *mode;
+    const char *path;
+    const char *mode;
 {
-	return gz_open(path, -1, mode);
+    return gz_open(path, -1, mode);
 }
 
 /* -- see zlib.h -- */
 gzFile ZEXPORT gzopen64(path, mode)
-const char *path;
-const char *mode;
+    const char *path;
+    const char *mode;
 {
-	return gz_open(path, -1, mode);
+    return gz_open(path, -1, mode);
 }
 
 /* -- see zlib.h -- */
 gzFile ZEXPORT gzdopen(fd, mode)
-int fd;
-const char *mode;
+    int fd;
+    const char *mode;
 {
-	char *path;         /* identifier for error messages */
-	gzFile gz;
-
-	if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
-		return NULL;
-	#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
-	snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
-	#else
-	sprintf(path, "<fd:%d>", fd);   /* for debugging */
-	#endif
-	gz = gz_open(path, fd, mode);
-	free(path);
-	return gz;
+    char *path;         /* identifier for error messages */
+    gzFile gz;
+
+    if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
+        return NULL;
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+    (void)snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd);
+#else
+    sprintf(path, "<fd:%d>", fd);   /* for debugging */
+#endif
+    gz = gz_open(path, fd, mode);
+    free(path);
+    return gz;
 }
 
 /* -- see zlib.h -- */
-#ifdef _WIN32
+#ifdef WIDECHAR
 gzFile ZEXPORT gzopen_w(path, mode)
-const wchar_t *path;
-const char *mode;
+    const wchar_t *path;
+    const char *mode;
 {
-	return gz_open(path, -2, mode);
+    return gz_open(path, -2, mode);
 }
 #endif
 
 /* -- see zlib.h -- */
 int ZEXPORT gzbuffer(file, size)
-gzFile file;
-unsigned size;
+    gzFile file;
+    unsigned size;
 {
-	gz_statep state;
-
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return -1;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return -1;
-
-	/* make sure we haven't already allocated memory */
-	if (state->size != 0)
-		return -1;
-
-	/* check and set requested size */
-	if (size < 2)
-		size = 2;               /* need two bytes to check magic header */
-	state->want = size;
-	return 0;
+    gz_statep state;
+
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return -1;
+
+    /* make sure we haven't already allocated memory */
+    if (state->size != 0)
+        return -1;
+
+    /* check and set requested size */
+    if ((size << 1) < size)
+        return -1;              /* need to be able to double it */
+    if (size < 2)
+        size = 2;               /* need two bytes to check magic header */
+    state->want = size;
+    return 0;
 }
 
 /* -- see zlib.h -- */
 int ZEXPORT gzrewind(file)
-gzFile file;
+    gzFile file;
 {
-	gz_statep state;
-
-	/* get internal structure */
-	if (file == NULL)
-		return -1;
-	state = (gz_statep)file;
-
-	/* check that we're reading and that there's no error */
-	if (state->mode != GZ_READ ||
-		(state->err != Z_OK && state->err != Z_BUF_ERROR))
-		return -1;
-
-	/* back up and start over */
-	if (LSEEK(state->fd, state->start, SEEK_SET) == -1)
-		return -1;
-	gz_reset(state);
-	return 0;
+    gz_statep state;
+
+    /* get internal structure */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+
+    /* check that we're reading and that there's no error */
+    if (state->mode != GZ_READ ||
+            (state->err != Z_OK && state->err != Z_BUF_ERROR))
+        return -1;
+
+    /* back up and start over */
+    if (LSEEK(state->fd, state->start, SEEK_SET) == -1)
+        return -1;
+    gz_reset(state);
+    return 0;
 }
 
 /* -- see zlib.h -- */
 z_off64_t ZEXPORT gzseek64(file, offset, whence)
-gzFile file;
-z_off64_t offset;
-int whence;
+    gzFile file;
+    z_off64_t offset;
+    int whence;
 {
-	unsigned n;
-	z_off64_t ret;
-	gz_statep state;
-
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return -1;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return -1;
-
-	/* check that there's no error */
-	if (state->err != Z_OK && state->err != Z_BUF_ERROR)
-		return -1;
-
-	/* can only seek from start or relative to current position */
-	if (whence != SEEK_SET && whence != SEEK_CUR)
-		return -1;
-
-	/* normalize offset to a SEEK_CUR specification */
-	if (whence == SEEK_SET)
-		offset -= state->x.pos;
-	else if (state->seek)
-		offset += state->skip;
-	state->seek = 0;
-
-	/* if within raw area while reading, just go there */
-	if (state->mode == GZ_READ && state->how == COPY &&
-		state->x.pos + offset >= 0) {
-		ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
-		if (ret == -1)
-			return -1;
-		state->x.have = 0;
-		state->eof = 0;
-		state->past = 0;
-		state->seek = 0;
-		gz_error(state, Z_OK, NULL);
-		state->strm.avail_in = 0;
-		state->x.pos += offset;
-		return state->x.pos;
-	}
-
-	/* calculate skip amount, rewinding if needed for back seek when reading */
-	if (offset < 0) {
-		if (state->mode != GZ_READ)         /* writing -- can't go backwards */
-			return -1;
-		offset += state->x.pos;
-		if (offset < 0)                     /* before start of file! */
-			return -1;
-		if (gzrewind(file) == -1)           /* rewind, then skip to offset */
-			return -1;
-	}
-
-	/* if reading, skip what's in output buffer (one less gzgetc() check) */
-	if (state->mode == GZ_READ) {
-		n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > offset ?
-			(unsigned)offset : state->x.have;
-		state->x.have -= n;
-		state->x.next += n;
-		state->x.pos += n;
-		offset -= n;
-	}
-
-	/* request skip (if not zero) */
-	if (offset) {
-		state->seek = 1;
-		state->skip = offset;
-	}
-	return state->x.pos + offset;
+    unsigned n;
+    z_off64_t ret;
+    gz_statep state;
+
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return -1;
+
+    /* check that there's no error */
+    if (state->err != Z_OK && state->err != Z_BUF_ERROR)
+        return -1;
+
+    /* can only seek from start or relative to current position */
+    if (whence != SEEK_SET && whence != SEEK_CUR)
+        return -1;
+
+    /* normalize offset to a SEEK_CUR specification */
+    if (whence == SEEK_SET)
+        offset -= state->x.pos;
+    else if (state->seek)
+        offset += state->skip;
+    state->seek = 0;
+
+    /* if within raw area while reading, just go there */
+    if (state->mode == GZ_READ && state->how == COPY &&
+            state->x.pos + offset >= 0) {
+        ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
+        if (ret == -1)
+            return -1;
+        state->x.have = 0;
+        state->eof = 0;
+        state->past = 0;
+        state->seek = 0;
+        gz_error(state, Z_OK, NULL);
+        state->strm.avail_in = 0;
+        state->x.pos += offset;
+        return state->x.pos;
+    }
+
+    /* calculate skip amount, rewinding if needed for back seek when reading */
+    if (offset < 0) {
+        if (state->mode != GZ_READ)         /* writing -- can't go backwards */
+            return -1;
+        offset += state->x.pos;
+        if (offset < 0)                     /* before start of file! */
+            return -1;
+        if (gzrewind(file) == -1)           /* rewind, then skip to offset */
+            return -1;
+    }
+
+    /* if reading, skip what's in output buffer (one less gzgetc() check) */
+    if (state->mode == GZ_READ) {
+        n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > offset ?
+            (unsigned)offset : state->x.have;
+        state->x.have -= n;
+        state->x.next += n;
+        state->x.pos += n;
+        offset -= n;
+    }
+
+    /* request skip (if not zero) */
+    if (offset) {
+        state->seek = 1;
+        state->skip = offset;
+    }
+    return state->x.pos + offset;
 }
 
 /* -- see zlib.h -- */
 z_off_t ZEXPORT gzseek(file, offset, whence)
-gzFile file;
-z_off_t offset;
-int whence;
+    gzFile file;
+    z_off_t offset;
+    int whence;
 {
-	z_off64_t ret;
+    z_off64_t ret;
 
-	ret = gzseek64(file, (z_off64_t)offset, whence);
-	return ret == (z_off_t)ret ? (z_off_t)ret : -1;
+    ret = gzseek64(file, (z_off64_t)offset, whence);
+    return ret == (z_off_t)ret ? (z_off_t)ret : -1;
 }
 
 /* -- see zlib.h -- */
 z_off64_t ZEXPORT gztell64(file)
-gzFile file;
+    gzFile file;
 {
-	gz_statep state;
+    gz_statep state;
 
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return -1;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return -1;
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return -1;
 
-	/* return position */
-	return state->x.pos + (state->seek ? state->skip : 0);
+    /* return position */
+    return state->x.pos + (state->seek ? state->skip : 0);
 }
 
 /* -- see zlib.h -- */
 z_off_t ZEXPORT gztell(file)
-gzFile file;
+    gzFile file;
 {
-	z_off64_t ret;
+    z_off64_t ret;
 
-	ret = gztell64(file);
-	return ret == (z_off_t)ret ? (z_off_t)ret : -1;
+    ret = gztell64(file);
+    return ret == (z_off_t)ret ? (z_off_t)ret : -1;
 }
 
 /* -- see zlib.h -- */
 z_off64_t ZEXPORT gzoffset64(file)
-gzFile file;
+    gzFile file;
 {
-	z_off64_t offset;
-	gz_statep state;
-
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return -1;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return -1;
-
-	/* compute and return effective offset in file */
-	offset = LSEEK(state->fd, 0, SEEK_CUR);
-	if (offset == -1)
-		return -1;
-	if (state->mode == GZ_READ)             /* reading */
-		offset -= state->strm.avail_in;     /* don't count buffered input */
-	return offset;
+    z_off64_t offset;
+    gz_statep state;
+
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return -1;
+
+    /* compute and return effective offset in file */
+    offset = LSEEK(state->fd, 0, SEEK_CUR);
+    if (offset == -1)
+        return -1;
+    if (state->mode == GZ_READ)             /* reading */
+        offset -= state->strm.avail_in;     /* don't count buffered input */
+    return offset;
 }
 
 /* -- see zlib.h -- */
 z_off_t ZEXPORT gzoffset(file)
-gzFile file;
+    gzFile file;
 {
-	z_off64_t ret;
+    z_off64_t ret;
 
-	ret = gzoffset64(file);
-	return ret == (z_off_t)ret ? (z_off_t)ret : -1;
+    ret = gzoffset64(file);
+    return ret == (z_off_t)ret ? (z_off_t)ret : -1;
 }
 
 /* -- see zlib.h -- */
 int ZEXPORT gzeof(file)
-gzFile file;
+    gzFile file;
 {
-	gz_statep state;
+    gz_statep state;
 
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return 0;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return 0;
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return 0;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return 0;
 
-	/* return end-of-file state */
-	return state->mode == GZ_READ ? state->past : 0;
+    /* return end-of-file state */
+    return state->mode == GZ_READ ? state->past : 0;
 }
 
 /* -- see zlib.h -- */
 const char * ZEXPORT gzerror(file, errnum)
-gzFile file;
-int *errnum;
+    gzFile file;
+    int *errnum;
 {
-	gz_statep state;
-
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return NULL;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return NULL;
-
-	/* return error information */
-	if (errnum != NULL)
-		*errnum = state->err;
-	return state->err == Z_MEM_ERROR ? "out of memory" :
-		(state->msg == NULL ? "" : state->msg);
+    gz_statep state;
+
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return NULL;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return NULL;
+
+    /* return error information */
+    if (errnum != NULL)
+        *errnum = state->err;
+    return state->err == Z_MEM_ERROR ? "out of memory" :
+                                       (state->msg == NULL ? "" : state->msg);
 }
 
 /* -- see zlib.h -- */
 void ZEXPORT gzclearerr(file)
-gzFile file;
+    gzFile file;
 {
-	gz_statep state;
-
-	/* get internal structure and check integrity */
-	if (file == NULL)
-		return;
-	state = (gz_statep)file;
-	if (state->mode != GZ_READ && state->mode != GZ_WRITE)
-		return;
-
-	/* clear error and end-of-file */
-	if (state->mode == GZ_READ) {
-		state->eof = 0;
-		state->past = 0;
-	}
-	gz_error(state, Z_OK, NULL);
+    gz_statep state;
+
+    /* get internal structure and check integrity */
+    if (file == NULL)
+        return;
+    state = (gz_statep)file;
+    if (state->mode != GZ_READ && state->mode != GZ_WRITE)
+        return;
+
+    /* clear error and end-of-file */
+    if (state->mode == GZ_READ) {
+        state->eof = 0;
+        state->past = 0;
+    }
+    gz_error(state, Z_OK, NULL);
 }
 
 /* Create an error message in allocated memory and set state->err and
-	state->msg accordingly.  Free any previous error message already there.  Do
-	not try to free or allocate space if the error is Z_MEM_ERROR (out of
-	memory).  Simply save the error message as a static string.  If there is an
-	allocation failure constructing the error message, then convert the error to
-	out of memory. */
+   state->msg accordingly.  Free any previous error message already there.  Do
+   not try to free or allocate space if the error is Z_MEM_ERROR (out of
+   memory).  Simply save the error message as a static string.  If there is an
+   allocation failure constructing the error message, then convert the error to
+   out of memory. */
 void ZLIB_INTERNAL gz_error(state, err, msg)
-gz_statep state;
-int err;
-const char *msg;
+    gz_statep state;
+    int err;
+    const char *msg;
 {
-	/* free previously allocated message and clear */
-	if (state->msg != NULL) {
-		if (state->err != Z_MEM_ERROR)
-			free(state->msg);
-		state->msg = NULL;
-	}
-
-	/* if fatal, set state->x.have to 0 so that the gzgetc() macro fails */
-	if (err != Z_OK && err != Z_BUF_ERROR)
-		state->x.have = 0;
-
-	/* set error code, and if no message, then done */
-	state->err = err;
-	if (msg == NULL)
-		return;
-
-	/* for an out of memory error, return literal string when requested */
-	if (err == Z_MEM_ERROR)
-		return;
-
-	/* construct error message with path */
-	if ((state->msg = (char *)malloc(strlen(state->path) + strlen(msg) + 3)) ==
-		NULL) {
-		state->err = Z_MEM_ERROR;
-		return;
-	}
-	#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
-	snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
-		"%s%s%s", state->path, ": ", msg);
-	#else
-	strcpy(state->msg, state->path);
-	strcat(state->msg, ": ");
-	strcat(state->msg, msg);
-	#endif
-	return;
+    /* free previously allocated message and clear */
+    if (state->msg != NULL) {
+        if (state->err != Z_MEM_ERROR)
+            free(state->msg);
+        state->msg = NULL;
+    }
+
+    /* if fatal, set state->x.have to 0 so that the gzgetc() macro fails */
+    if (err != Z_OK && err != Z_BUF_ERROR)
+        state->x.have = 0;
+
+    /* set error code, and if no message, then done */
+    state->err = err;
+    if (msg == NULL)
+        return;
+
+    /* for an out of memory error, return literal string when requested */
+    if (err == Z_MEM_ERROR)
+        return;
+
+    /* construct error message with path */
+    if ((state->msg = (char *)malloc(strlen(state->path) + strlen(msg) + 3)) ==
+            NULL) {
+        state->err = Z_MEM_ERROR;
+        return;
+    }
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+    (void)snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
+                   "%s%s%s", state->path, ": ", msg);
+#else
+    strcpy(state->msg, state->path);
+    strcat(state->msg, ": ");
+    strcat(state->msg, msg);
+#endif
 }
 
 #ifndef INT_MAX
 /* portably return maximum value for an int (when limits.h presumed not
-	available) -- we need to do this to cover cases where 2's complement not
-	used, since C standard permits 1's complement and sign-bit representations,
-	otherwise we could just use ((unsigned)-1) >> 1 */
+   available) -- we need to do this to cover cases where 2's complement not
+   used, since C standard permits 1's complement and sign-bit representations,
+   otherwise we could just use ((unsigned)-1) >> 1 */
 unsigned ZLIB_INTERNAL gz_intmax()
 {
-	unsigned p, q;
-
-	p = 1;
-	do {
-		q = p;
-		p <<= 1;
-		p++;
-	} while (p > q);
-	return q >> 1;
+    unsigned p, q;
+
+    p = 1;
+    do {
+        q = p;
+        p <<= 1;
+        p++;
+    } while (p > q);
+    return q >> 1;
 }
 #endif