Merge commit godotengine/godot@0f5f3bc9546b46b2029fc8896dc859697f1eab97

4 files changed, 0 insertions, 1838 deletions

diff --git a/thirdparty/zlib/gzclose.c b/thirdparty/zlib/gzclose.c
deleted file mode 100644
index 48d6a86f04..0000000000
--- a/thirdparty/zlib/gzclose.c
+++ /dev/null
@@ -1,23 +0,0 @@
-/* gzclose.c -- zlib gzclose() function
- * Copyright (C) 2004, 2010 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "gzguts.h"
-
-/* gzclose() is in a separate file so that it is linked in only if it is used.
-   That way the other gzclose functions can be used instead to avoid linking in
-   unneeded compression or decompression routines. */
-int ZEXPORT gzclose(gzFile file) {
-#ifndef NO_GZCOMPRESS
-    gz_statep state;
-
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-
-    return state->mode == GZ_READ ? gzclose_r(file) : gzclose_w(file);
-#else
-    return gzclose_r(file);
-#endif
-}
diff --git a/thirdparty/zlib/gzlib.c b/thirdparty/zlib/gzlib.c
deleted file mode 100644
index 983153cc8e..0000000000
--- a/thirdparty/zlib/gzlib.c
+++ /dev/null
@@ -1,582 +0,0 @@
-/* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004-2024 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "gzguts.h"
-
-#if defined(_WIN32) && !defined(__BORLANDC__)
-#  define LSEEK _lseeki64
-#else
-#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
-#  define LSEEK lseek64
-#else
-#  define LSEEK lseek
-#endif
-#endif
-
-#if defined UNDER_CE
-
-/* Map the Windows error number in ERROR to a locale-dependent error message
-   string and return a pointer to it.  Typically, the values for ERROR come
-   from GetLastError.
-
-   The string pointed to shall not be modified by the application, but may be
-   overwritten by a subsequent call to gz_strwinerror
-
-   The gz_strwinerror function does not change the current setting of
-   GetLastError. */
-char ZLIB_INTERNAL *gz_strwinerror(DWORD error) {
-    static char buf[1024];
-
-    wchar_t *msgbuf;
-    DWORD lasterr = GetLastError();
-    DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
-        | FORMAT_MESSAGE_ALLOCATE_BUFFER,
-        NULL,
-        error,
-        0, /* Default language */
-        (LPVOID)&msgbuf,
-        0,
-        NULL);
-    if (chars != 0) {
-        /* If there is an \r\n appended, zap it.  */
-        if (chars >= 2
-            && msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
-            chars -= 2;
-            msgbuf[chars] = 0;
-        }
-
-        if (chars > sizeof (buf) - 1) {
-            chars = sizeof (buf) - 1;
-            msgbuf[chars] = 0;
-        }
-
-        wcstombs(buf, msgbuf, chars + 1);
-        LocalFree(msgbuf);
-    }
-    else {
-        sprintf(buf, "unknown win32 error (%ld)", error);
-    }
-
-    SetLastError(lasterr);
-    return buf;
-}
-
-#endif /* UNDER_CE */
-
-/* Reset gzip file state */
-local void gz_reset(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 */
-    }
-    else                            /* for writing ... */
-        state->reset = 0;           /* no deflateReset pending */
-    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(const void *path, int fd, const char *mode) {
-    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(const char *path, const char *mode) {
-    return gz_open(path, -1, mode);
-}
-
-/* -- see zlib.h -- */
-gzFile ZEXPORT gzopen64(const char *path, const char *mode) {
-    return gz_open(path, -1, mode);
-}
-
-/* -- see zlib.h -- */
-gzFile ZEXPORT gzdopen(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)
-    (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 WIDECHAR
-gzFile ZEXPORT gzopen_w(const wchar_t *path, const char *mode) {
-    return gz_open(path, -2, mode);
-}
-#endif
-
-/* -- see zlib.h -- */
-int ZEXPORT gzbuffer(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 << 1) < size)
-        return -1;              /* need to be able to double it */
-    if (size < 8)
-        size = 8;               /* needed to behave well with flushing */
-    state->want = size;
-    return 0;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzrewind(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;
-}
-
-/* -- see zlib.h -- */
-z_off64_t ZEXPORT gzseek64(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 - (z_off64_t)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(gzFile file, z_off_t offset, int whence) {
-    z_off64_t ret;
-
-    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(gzFile file) {
-    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;
-
-    /* return position */
-    return state->x.pos + (state->seek ? state->skip : 0);
-}
-
-/* -- see zlib.h -- */
-z_off_t ZEXPORT gztell(gzFile file) {
-    z_off64_t ret;
-
-    ret = gztell64(file);
-    return ret == (z_off_t)ret ? (z_off_t)ret : -1;
-}
-
-/* -- see zlib.h -- */
-z_off64_t ZEXPORT gzoffset64(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;
-}
-
-/* -- see zlib.h -- */
-z_off_t ZEXPORT gzoffset(gzFile file) {
-    z_off64_t ret;
-
-    ret = gzoffset64(file);
-    return ret == (z_off_t)ret ? (z_off_t)ret : -1;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzeof(gzFile file) {
-    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;
-
-    /* return end-of-file state */
-    return state->mode == GZ_READ ? state->past : 0;
-}
-
-/* -- see zlib.h -- */
-const char * ZEXPORT gzerror(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);
-}
-
-/* -- see zlib.h -- */
-void ZEXPORT gzclearerr(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);
-}
-
-/* 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. */
-void ZLIB_INTERNAL gz_error(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)
-    (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
-}
-
-/* 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 */
-unsigned ZLIB_INTERNAL gz_intmax(void) {
-#ifdef INT_MAX
-    return INT_MAX;
-#else
-    unsigned p = 1, q;
-    do {
-        q = p;
-        p <<= 1;
-        p++;
-    } while (p > q);
-    return q >> 1;
-#endif
-}
diff --git a/thirdparty/zlib/gzread.c b/thirdparty/zlib/gzread.c
deleted file mode 100644
index 4168cbc887..0000000000
--- a/thirdparty/zlib/gzread.c
+++ /dev/null
@@ -1,602 +0,0 @@
-/* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004-2017 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "gzguts.h"
-
-/* Use read() to load a buffer -- return -1 on error, otherwise 0.  Read from
-   state->fd, and update state->eof, state->err, and state->msg as appropriate.
-   This function needs to loop on read(), since read() is not guaranteed to
-   read the number of bytes requested, depending on the type of descriptor. */
-local int gz_load(gz_statep state, unsigned char *buf, unsigned len,
-                  unsigned *have) {
-    int ret;
-    unsigned get, max = ((unsigned)-1 >> 2) + 1;
-
-    *have = 0;
-    do {
-        get = len - *have;
-        if (get > max)
-            get = max;
-        ret = read(state->fd, buf + *have, get);
-        if (ret <= 0)
-            break;
-        *have += (unsigned)ret;
-    } while (*have < len);
-    if (ret < 0) {
-        gz_error(state, Z_ERRNO, zstrerror());
-        return -1;
-    }
-    if (ret == 0)
-        state->eof = 1;
-    return 0;
-}
-
-/* Load up input buffer and set eof flag if last data loaded -- return -1 on
-   error, 0 otherwise.  Note that the eof flag is set when the end of the input
-   file is reached, even though there may be unused data in the buffer.  Once
-   that data has been used, no more attempts will be made to read the file.
-   If strm->avail_in != 0, then the current data is moved to the beginning of
-   the input buffer, and then the remainder of the buffer is loaded with the
-   available data from the input file. */
-local int gz_avail(gz_statep state) {
-    unsigned got;
-    z_streamp strm = &(state->strm);
-
-    if (state->err != Z_OK && state->err != Z_BUF_ERROR)
-        return -1;
-    if (state->eof == 0) {
-        if (strm->avail_in) {       /* copy what's there to the start */
-            unsigned char *p = state->in;
-            unsigned const char *q = strm->next_in;
-            unsigned n = strm->avail_in;
-            do {
-                *p++ = *q++;
-            } while (--n);
-        }
-        if (gz_load(state, state->in + strm->avail_in,
-                    state->size - strm->avail_in, &got) == -1)
-            return -1;
-        strm->avail_in += got;
-        strm->next_in = state->in;
-    }
-    return 0;
-}
-
-/* Look for gzip header, set up for inflate or copy.  state->x.have must be 0.
-   If this is the first time in, allocate required memory.  state->how will be
-   left unchanged if there is no more input data available, will be set to COPY
-   if there is no gzip header and direct copying will be performed, or it will
-   be set to GZIP for decompression.  If direct copying, then leftover input
-   data from the input buffer will be copied to the output buffer.  In that
-   case, all further file reads will be directly to either the output buffer or
-   a user buffer.  If decompressing, the inflate state will be initialized.
-   gz_look() will return 0 on success or -1 on failure. */
-local int gz_look(gz_statep state) {
-    z_streamp strm = &(state->strm);
-
-    /* allocate read buffers and inflate memory */
-    if (state->size == 0) {
-        /* allocate buffers */
-        state->in = (unsigned char *)malloc(state->want);
-        state->out = (unsigned char *)malloc(state->want << 1);
-        if (state->in == NULL || state->out == NULL) {
-            free(state->out);
-            free(state->in);
-            gz_error(state, Z_MEM_ERROR, "out of memory");
-            return -1;
-        }
-        state->size = state->want;
-
-        /* allocate inflate memory */
-        state->strm.zalloc = Z_NULL;
-        state->strm.zfree = Z_NULL;
-        state->strm.opaque = Z_NULL;
-        state->strm.avail_in = 0;
-        state->strm.next_in = Z_NULL;
-        if (inflateInit2(&(state->strm), 15 + 16) != Z_OK) {    /* gunzip */
-            free(state->out);
-            free(state->in);
-            state->size = 0;
-            gz_error(state, Z_MEM_ERROR, "out of memory");
-            return -1;
-        }
-    }
-
-    /* get at least the magic bytes in the input buffer */
-    if (strm->avail_in < 2) {
-        if (gz_avail(state) == -1)
-            return -1;
-        if (strm->avail_in == 0)
-            return 0;
-    }
-
-    /* look for gzip magic bytes -- if there, do gzip decoding (note: there is
-       a logical dilemma here when considering the case of a partially written
-       gzip file, to wit, if a single 31 byte is written, then we cannot tell
-       whether this is a single-byte file, or just a partially written gzip
-       file -- for here we assume that if a gzip file is being written, then
-       the header will be written in a single operation, so that reading a
-       single byte is sufficient indication that it is not a gzip file) */
-    if (strm->avail_in > 1 &&
-            strm->next_in[0] == 31 && strm->next_in[1] == 139) {
-        inflateReset(strm);
-        state->how = GZIP;
-        state->direct = 0;
-        return 0;
-    }
-
-    /* no gzip header -- if we were decoding gzip before, then this is trailing
-       garbage.  Ignore the trailing garbage and finish. */
-    if (state->direct == 0) {
-        strm->avail_in = 0;
-        state->eof = 1;
-        state->x.have = 0;
-        return 0;
-    }
-
-    /* doing raw i/o, copy any leftover input to output -- this assumes that
-       the output buffer is larger than the input buffer, which also assures
-       space for gzungetc() */
-    state->x.next = state->out;
-    memcpy(state->x.next, strm->next_in, strm->avail_in);
-    state->x.have = strm->avail_in;
-    strm->avail_in = 0;
-    state->how = COPY;
-    state->direct = 1;
-    return 0;
-}
-
-/* Decompress from input to the provided next_out and avail_out in the state.
-   On return, state->x.have and state->x.next point to the just decompressed
-   data.  If the gzip stream completes, state->how is reset to LOOK to look for
-   the next gzip stream or raw data, once state->x.have is depleted.  Returns 0
-   on success, -1 on failure. */
-local int gz_decomp(gz_statep state) {
-    int ret = Z_OK;
-    unsigned had;
-    z_streamp strm = &(state->strm);
-
-    /* fill output buffer up to end of deflate stream */
-    had = strm->avail_out;
-    do {
-        /* get more input for inflate() */
-        if (strm->avail_in == 0 && gz_avail(state) == -1)
-            return -1;
-        if (strm->avail_in == 0) {
-            gz_error(state, Z_BUF_ERROR, "unexpected end of file");
-            break;
-        }
-
-        /* decompress and handle errors */
-        ret = inflate(strm, Z_NO_FLUSH);
-        if (ret == Z_STREAM_ERROR || ret == Z_NEED_DICT) {
-            gz_error(state, Z_STREAM_ERROR,
-                     "internal error: inflate stream corrupt");
-            return -1;
-        }
-        if (ret == Z_MEM_ERROR) {
-            gz_error(state, Z_MEM_ERROR, "out of memory");
-            return -1;
-        }
-        if (ret == Z_DATA_ERROR) {              /* deflate stream invalid */
-            gz_error(state, Z_DATA_ERROR,
-                     strm->msg == NULL ? "compressed data error" : strm->msg);
-            return -1;
-        }
-    } while (strm->avail_out && ret != Z_STREAM_END);
-
-    /* update available output */
-    state->x.have = had - strm->avail_out;
-    state->x.next = strm->next_out - state->x.have;
-
-    /* if the gzip stream completed successfully, look for another */
-    if (ret == Z_STREAM_END)
-        state->how = LOOK;
-
-    /* good decompression */
-    return 0;
-}
-
-/* Fetch data and put it in the output buffer.  Assumes state->x.have is 0.
-   Data is either copied from the input file or decompressed from the input
-   file depending on state->how.  If state->how is LOOK, then a gzip header is
-   looked for to determine whether to copy or decompress.  Returns -1 on error,
-   otherwise 0.  gz_fetch() will leave state->how as COPY or GZIP unless the
-   end of the input file has been reached and all data has been processed.  */
-local int gz_fetch(gz_statep state) {
-    z_streamp strm = &(state->strm);
-
-    do {
-        switch(state->how) {
-        case LOOK:      /* -> LOOK, COPY (only if never GZIP), or GZIP */
-            if (gz_look(state) == -1)
-                return -1;
-            if (state->how == LOOK)
-                return 0;
-            break;
-        case COPY:      /* -> COPY */
-            if (gz_load(state, state->out, state->size << 1, &(state->x.have))
-                    == -1)
-                return -1;
-            state->x.next = state->out;
-            return 0;
-        case GZIP:      /* -> GZIP or LOOK (if end of gzip stream) */
-            strm->avail_out = state->size << 1;
-            strm->next_out = state->out;
-            if (gz_decomp(state) == -1)
-                return -1;
-        }
-    } while (state->x.have == 0 && (!state->eof || strm->avail_in));
-    return 0;
-}
-
-/* Skip len uncompressed bytes of output.  Return -1 on error, 0 on success. */
-local int gz_skip(gz_statep state, z_off64_t len) {
-    unsigned n;
-
-    /* skip over len bytes or reach end-of-file, whichever comes first */
-    while (len)
-        /* skip over whatever is in output buffer */
-        if (state->x.have) {
-            n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > len ?
-                (unsigned)len : state->x.have;
-            state->x.have -= n;
-            state->x.next += n;
-            state->x.pos += n;
-            len -= n;
-        }
-
-        /* output buffer empty -- return if we're at the end of the input */
-        else if (state->eof && state->strm.avail_in == 0)
-            break;
-
-        /* need more data to skip -- load up output buffer */
-        else {
-            /* get more output, looking for header if required */
-            if (gz_fetch(state) == -1)
-                return -1;
-        }
-    return 0;
-}
-
-/* Read len bytes into buf from file, or less than len up to the end of the
-   input.  Return the number of bytes read.  If zero is returned, either the
-   end of file was reached, or there was an error.  state->err must be
-   consulted in that case to determine which. */
-local z_size_t gz_read(gz_statep state, voidp buf, z_size_t len) {
-    z_size_t got;
-    unsigned n;
-
-    /* if len is zero, avoid unnecessary operations */
-    if (len == 0)
-        return 0;
-
-    /* process a skip request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_skip(state, state->skip) == -1)
-            return 0;
-    }
-
-    /* get len bytes to buf, or less than len if at the end */
-    got = 0;
-    do {
-        /* set n to the maximum amount of len that fits in an unsigned int */
-        n = (unsigned)-1;
-        if (n > len)
-            n = (unsigned)len;
-
-        /* first just try copying data from the output buffer */
-        if (state->x.have) {
-            if (state->x.have < n)
-                n = state->x.have;
-            memcpy(buf, state->x.next, n);
-            state->x.next += n;
-            state->x.have -= n;
-        }
-
-        /* output buffer empty -- return if we're at the end of the input */
-        else if (state->eof && state->strm.avail_in == 0) {
-            state->past = 1;        /* tried to read past end */
-            break;
-        }
-
-        /* need output data -- for small len or new stream load up our output
-           buffer */
-        else if (state->how == LOOK || n < (state->size << 1)) {
-            /* get more output, looking for header if required */
-            if (gz_fetch(state) == -1)
-                return 0;
-            continue;       /* no progress yet -- go back to copy above */
-            /* the copy above assures that we will leave with space in the
-               output buffer, allowing at least one gzungetc() to succeed */
-        }
-
-        /* large len -- read directly into user buffer */
-        else if (state->how == COPY) {      /* read directly */
-            if (gz_load(state, (unsigned char *)buf, n, &n) == -1)
-                return 0;
-        }
-
-        /* large len -- decompress directly into user buffer */
-        else {  /* state->how == GZIP */
-            state->strm.avail_out = n;
-            state->strm.next_out = (unsigned char *)buf;
-            if (gz_decomp(state) == -1)
-                return 0;
-            n = state->x.have;
-            state->x.have = 0;
-        }
-
-        /* update progress */
-        len -= n;
-        buf = (char *)buf + n;
-        got += n;
-        state->x.pos += n;
-    } while (len);
-
-    /* return number of bytes read into user buffer */
-    return got;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzread(gzFile file, voidp buf, unsigned len) {
-    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 (serious) error */
-    if (state->mode != GZ_READ ||
-            (state->err != Z_OK && state->err != Z_BUF_ERROR))
-        return -1;
-
-    /* since an int is returned, make sure len fits in one, otherwise return
-       with an error (this avoids a flaw in the interface) */
-    if ((int)len < 0) {
-        gz_error(state, Z_STREAM_ERROR, "request does not fit in an int");
-        return -1;
-    }
-
-    /* read len or fewer bytes to buf */
-    len = (unsigned)gz_read(state, buf, len);
-
-    /* check for an error */
-    if (len == 0 && state->err != Z_OK && state->err != Z_BUF_ERROR)
-        return -1;
-
-    /* return the number of bytes read (this is assured to fit in an int) */
-    return (int)len;
-}
-
-/* -- see zlib.h -- */
-z_size_t ZEXPORT gzfread(voidp buf, z_size_t size, z_size_t nitems, gzFile file) {
-    z_size_t len;
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return 0;
-    state = (gz_statep)file;
-
-    /* check that we're reading and that there's no (serious) error */
-    if (state->mode != GZ_READ ||
-            (state->err != Z_OK && state->err != Z_BUF_ERROR))
-        return 0;
-
-    /* compute bytes to read -- error on overflow */
-    len = nitems * size;
-    if (size && len / size != nitems) {
-        gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
-        return 0;
-    }
-
-    /* read len or fewer bytes to buf, return the number of full items read */
-    return len ? gz_read(state, buf, len) / size : 0;
-}
-
-/* -- see zlib.h -- */
-#ifdef Z_PREFIX_SET
-#  undef z_gzgetc
-#else
-#  undef gzgetc
-#endif
-int ZEXPORT gzgetc(gzFile file) {
-    unsigned char buf[1];
-    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 (serious) error */
-    if (state->mode != GZ_READ ||
-        (state->err != Z_OK && state->err != Z_BUF_ERROR))
-        return -1;
-
-    /* try output buffer (no need to check for skip request) */
-    if (state->x.have) {
-        state->x.have--;
-        state->x.pos++;
-        return *(state->x.next)++;
-    }
-
-    /* nothing there -- try gz_read() */
-    return gz_read(state, buf, 1) < 1 ? -1 : buf[0];
-}
-
-int ZEXPORT gzgetc_(gzFile file) {
-    return gzgetc(file);
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzungetc(int c, gzFile file) {
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return -1;
-    state = (gz_statep)file;
-
-    /* in case this was just opened, set up the input buffer */
-    if (state->mode == GZ_READ && state->how == LOOK && state->x.have == 0)
-        (void)gz_look(state);
-
-    /* check that we're reading and that there's no (serious) error */
-    if (state->mode != GZ_READ ||
-        (state->err != Z_OK && state->err != Z_BUF_ERROR))
-        return -1;
-
-    /* process a skip request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_skip(state, state->skip) == -1)
-            return -1;
-    }
-
-    /* can't push EOF */
-    if (c < 0)
-        return -1;
-
-    /* if output buffer empty, put byte at end (allows more pushing) */
-    if (state->x.have == 0) {
-        state->x.have = 1;
-        state->x.next = state->out + (state->size << 1) - 1;
-        state->x.next[0] = (unsigned char)c;
-        state->x.pos--;
-        state->past = 0;
-        return c;
-    }
-
-    /* if no room, give up (must have already done a gzungetc()) */
-    if (state->x.have == (state->size << 1)) {
-        gz_error(state, Z_DATA_ERROR, "out of room to push characters");
-        return -1;
-    }
-
-    /* slide output data if needed and insert byte before existing data */
-    if (state->x.next == state->out) {
-        unsigned char *src = state->out + state->x.have;
-        unsigned char *dest = state->out + (state->size << 1);
-        while (src > state->out)
-            *--dest = *--src;
-        state->x.next = dest;
-    }
-    state->x.have++;
-    state->x.next--;
-    state->x.next[0] = (unsigned char)c;
-    state->x.pos--;
-    state->past = 0;
-    return c;
-}
-
-/* -- see zlib.h -- */
-char * ZEXPORT gzgets(gzFile file, char *buf, int len) {
-    unsigned left, n;
-    char *str;
-    unsigned char *eol;
-    gz_statep state;
-
-    /* check parameters and get internal structure */
-    if (file == NULL || buf == NULL || len < 1)
-        return NULL;
-    state = (gz_statep)file;
-
-    /* check that we're reading and that there's no (serious) error */
-    if (state->mode != GZ_READ ||
-        (state->err != Z_OK && state->err != Z_BUF_ERROR))
-        return NULL;
-
-    /* process a skip request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_skip(state, state->skip) == -1)
-            return NULL;
-    }
-
-    /* copy output bytes up to new line or len - 1, whichever comes first --
-       append a terminating zero to the string (we don't check for a zero in
-       the contents, let the user worry about that) */
-    str = buf;
-    left = (unsigned)len - 1;
-    if (left) do {
-        /* assure that something is in the output buffer */
-        if (state->x.have == 0 && gz_fetch(state) == -1)
-            return NULL;                /* error */
-        if (state->x.have == 0) {       /* end of file */
-            state->past = 1;            /* read past end */
-            break;                      /* return what we have */
-        }
-
-        /* look for end-of-line in current output buffer */
-        n = state->x.have > left ? left : state->x.have;
-        eol = (unsigned char *)memchr(state->x.next, '\n', n);
-        if (eol != NULL)
-            n = (unsigned)(eol - state->x.next) + 1;
-
-        /* copy through end-of-line, or remainder if not found */
-        memcpy(buf, state->x.next, n);
-        state->x.have -= n;
-        state->x.next += n;
-        state->x.pos += n;
-        left -= n;
-        buf += n;
-    } while (left && eol == NULL);
-
-    /* return terminated string, or if nothing, end of file */
-    if (buf == str)
-        return NULL;
-    buf[0] = 0;
-    return str;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzdirect(gzFile file) {
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return 0;
-    state = (gz_statep)file;
-
-    /* if the state is not known, but we can find out, then do so (this is
-       mainly for right after a gzopen() or gzdopen()) */
-    if (state->mode == GZ_READ && state->how == LOOK && state->x.have == 0)
-        (void)gz_look(state);
-
-    /* return 1 if transparent, 0 if processing a gzip stream */
-    return state->direct;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzclose_r(gzFile file) {
-    int ret, err;
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-
-    /* check that we're reading */
-    if (state->mode != GZ_READ)
-        return Z_STREAM_ERROR;
-
-    /* free memory and close file */
-    if (state->size) {
-        inflateEnd(&(state->strm));
-        free(state->out);
-        free(state->in);
-    }
-    err = state->err == Z_BUF_ERROR ? Z_BUF_ERROR : Z_OK;
-    gz_error(state, Z_OK, NULL);
-    free(state->path);
-    ret = close(state->fd);
-    free(state);
-    return ret ? Z_ERRNO : err;
-}
diff --git a/thirdparty/zlib/gzwrite.c b/thirdparty/zlib/gzwrite.c
deleted file mode 100644
index 435b4621b5..0000000000
--- a/thirdparty/zlib/gzwrite.c
+++ /dev/null
@@ -1,631 +0,0 @@
-/* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004-2019 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "gzguts.h"
-
-/* Initialize state for writing a gzip file.  Mark initialization by setting
-   state->size to non-zero.  Return -1 on a memory allocation failure, or 0 on
-   success. */
-local int gz_init(gz_statep state) {
-    int ret;
-    z_streamp strm = &(state->strm);
-
-    /* allocate input buffer (double size for gzprintf) */
-    state->in = (unsigned char *)malloc(state->want << 1);
-    if (state->in == NULL) {
-        gz_error(state, Z_MEM_ERROR, "out of memory");
-        return -1;
-    }
-
-    /* only need output buffer and deflate state if compressing */
-    if (!state->direct) {
-        /* allocate output buffer */
-        state->out = (unsigned char *)malloc(state->want);
-        if (state->out == NULL) {
-            free(state->in);
-            gz_error(state, Z_MEM_ERROR, "out of memory");
-            return -1;
-        }
-
-        /* allocate deflate memory, set up for gzip compression */
-        strm->zalloc = Z_NULL;
-        strm->zfree = Z_NULL;
-        strm->opaque = Z_NULL;
-        ret = deflateInit2(strm, state->level, Z_DEFLATED,
-                           MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);
-        if (ret != Z_OK) {
-            free(state->out);
-            free(state->in);
-            gz_error(state, Z_MEM_ERROR, "out of memory");
-            return -1;
-        }
-        strm->next_in = NULL;
-    }
-
-    /* mark state as initialized */
-    state->size = state->want;
-
-    /* initialize write buffer if compressing */
-    if (!state->direct) {
-        strm->avail_out = state->size;
-        strm->next_out = state->out;
-        state->x.next = strm->next_out;
-    }
-    return 0;
-}
-
-/* Compress whatever is at avail_in and next_in and write to the output file.
-   Return -1 if there is an error writing to the output file or if gz_init()
-   fails to allocate memory, otherwise 0.  flush is assumed to be a valid
-   deflate() flush value.  If flush is Z_FINISH, then the deflate() state is
-   reset to start a new gzip stream.  If gz->direct is true, then simply write
-   to the output file without compressing, and ignore flush. */
-local int gz_comp(gz_statep state, int flush) {
-    int ret, writ;
-    unsigned have, put, max = ((unsigned)-1 >> 2) + 1;
-    z_streamp strm = &(state->strm);
-
-    /* allocate memory if this is the first time through */
-    if (state->size == 0 && gz_init(state) == -1)
-        return -1;
-
-    /* write directly if requested */
-    if (state->direct) {
-        while (strm->avail_in) {
-            put = strm->avail_in > max ? max : strm->avail_in;
-            writ = write(state->fd, strm->next_in, put);
-            if (writ < 0) {
-                gz_error(state, Z_ERRNO, zstrerror());
-                return -1;
-            }
-            strm->avail_in -= (unsigned)writ;
-            strm->next_in += writ;
-        }
-        return 0;
-    }
-
-    /* check for a pending reset */
-    if (state->reset) {
-        /* don't start a new gzip member unless there is data to write */
-        if (strm->avail_in == 0)
-            return 0;
-        deflateReset(strm);
-        state->reset = 0;
-    }
-
-    /* run deflate() on provided input until it produces no more output */
-    ret = Z_OK;
-    do {
-        /* write out current buffer contents if full, or if flushing, but if
-           doing Z_FINISH then don't write until we get to Z_STREAM_END */
-        if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
-            (flush != Z_FINISH || ret == Z_STREAM_END))) {
-            while (strm->next_out > state->x.next) {
-                put = strm->next_out - state->x.next > (int)max ? max :
-                      (unsigned)(strm->next_out - state->x.next);
-                writ = write(state->fd, state->x.next, put);
-                if (writ < 0) {
-                    gz_error(state, Z_ERRNO, zstrerror());
-                    return -1;
-                }
-                state->x.next += writ;
-            }
-            if (strm->avail_out == 0) {
-                strm->avail_out = state->size;
-                strm->next_out = state->out;
-                state->x.next = state->out;
-            }
-        }
-
-        /* compress */
-        have = strm->avail_out;
-        ret = deflate(strm, flush);
-        if (ret == Z_STREAM_ERROR) {
-            gz_error(state, Z_STREAM_ERROR,
-                      "internal error: deflate stream corrupt");
-            return -1;
-        }
-        have -= strm->avail_out;
-    } while (have);
-
-    /* if that completed a deflate stream, allow another to start */
-    if (flush == Z_FINISH)
-        state->reset = 1;
-
-    /* all done, no errors */
-    return 0;
-}
-
-/* Compress len zeros to output.  Return -1 on a write error or memory
-   allocation failure by gz_comp(), or 0 on success. */
-local int gz_zero(gz_statep state, z_off64_t len) {
-    int first;
-    unsigned n;
-    z_streamp strm = &(state->strm);
-
-    /* consume whatever's left in the input buffer */
-    if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
-        return -1;
-
-    /* compress len zeros (len guaranteed > 0) */
-    first = 1;
-    while (len) {
-        n = GT_OFF(state->size) || (z_off64_t)state->size > len ?
-            (unsigned)len : state->size;
-        if (first) {
-            memset(state->in, 0, n);
-            first = 0;
-        }
-        strm->avail_in = n;
-        strm->next_in = state->in;
-        state->x.pos += n;
-        if (gz_comp(state, Z_NO_FLUSH) == -1)
-            return -1;
-        len -= n;
-    }
-    return 0;
-}
-
-/* Write len bytes from buf to file.  Return the number of bytes written.  If
-   the returned value is less than len, then there was an error. */
-local z_size_t gz_write(gz_statep state, voidpc buf, z_size_t len) {
-    z_size_t put = len;
-
-    /* if len is zero, avoid unnecessary operations */
-    if (len == 0)
-        return 0;
-
-    /* allocate memory if this is the first time through */
-    if (state->size == 0 && gz_init(state) == -1)
-        return 0;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            return 0;
-    }
-
-    /* for small len, copy to input buffer, otherwise compress directly */
-    if (len < state->size) {
-        /* copy to input buffer, compress when full */
-        do {
-            unsigned have, copy;
-
-            if (state->strm.avail_in == 0)
-                state->strm.next_in = state->in;
-            have = (unsigned)((state->strm.next_in + state->strm.avail_in) -
-                              state->in);
-            copy = state->size - have;
-            if (copy > len)
-                copy = (unsigned)len;
-            memcpy(state->in + have, buf, copy);
-            state->strm.avail_in += copy;
-            state->x.pos += copy;
-            buf = (const char *)buf + copy;
-            len -= copy;
-            if (len && gz_comp(state, Z_NO_FLUSH) == -1)
-                return 0;
-        } while (len);
-    }
-    else {
-        /* consume whatever's left in the input buffer */
-        if (state->strm.avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
-            return 0;
-
-        /* directly compress user buffer to file */
-        state->strm.next_in = (z_const Bytef *)buf;
-        do {
-            unsigned n = (unsigned)-1;
-            if (n > len)
-                n = (unsigned)len;
-            state->strm.avail_in = n;
-            state->x.pos += n;
-            if (gz_comp(state, Z_NO_FLUSH) == -1)
-                return 0;
-            len -= n;
-        } while (len);
-    }
-
-    /* input was all buffered or compressed */
-    return put;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzwrite(gzFile file, voidpc buf, unsigned len) {
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return 0;
-    state = (gz_statep)file;
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return 0;
-
-    /* since an int is returned, make sure len fits in one, otherwise return
-       with an error (this avoids a flaw in the interface) */
-    if ((int)len < 0) {
-        gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
-        return 0;
-    }
-
-    /* write len bytes from buf (the return value will fit in an int) */
-    return (int)gz_write(state, buf, len);
-}
-
-/* -- see zlib.h -- */
-z_size_t ZEXPORT gzfwrite(voidpc buf, z_size_t size, z_size_t nitems,
-                          gzFile file) {
-    z_size_t len;
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return 0;
-    state = (gz_statep)file;
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return 0;
-
-    /* compute bytes to read -- error on overflow */
-    len = nitems * size;
-    if (size && len / size != nitems) {
-        gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
-        return 0;
-    }
-
-    /* write len bytes to buf, return the number of full items written */
-    return len ? gz_write(state, buf, len) / size : 0;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzputc(gzFile file, int c) {
-    unsigned have;
-    unsigned char buf[1];
-    gz_statep state;
-    z_streamp strm;
-
-    /* get internal structure */
-    if (file == NULL)
-        return -1;
-    state = (gz_statep)file;
-    strm = &(state->strm);
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return -1;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            return -1;
-    }
-
-    /* try writing to input buffer for speed (state->size == 0 if buffer not
-       initialized) */
-    if (state->size) {
-        if (strm->avail_in == 0)
-            strm->next_in = state->in;
-        have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
-        if (have < state->size) {
-            state->in[have] = (unsigned char)c;
-            strm->avail_in++;
-            state->x.pos++;
-            return c & 0xff;
-        }
-    }
-
-    /* no room in buffer or not initialized, use gz_write() */
-    buf[0] = (unsigned char)c;
-    if (gz_write(state, buf, 1) != 1)
-        return -1;
-    return c & 0xff;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzputs(gzFile file, const char *s) {
-    z_size_t len, put;
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return -1;
-    state = (gz_statep)file;
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return -1;
-
-    /* write string */
-    len = strlen(s);
-    if ((int)len < 0 || (unsigned)len != len) {
-        gz_error(state, Z_STREAM_ERROR, "string length does not fit in int");
-        return -1;
-    }
-    put = gz_write(state, s, len);
-    return put < len ? -1 : (int)len;
-}
-
-#if defined(STDC) || defined(Z_HAVE_STDARG_H)
-#include <stdarg.h>
-
-/* -- see zlib.h -- */
-int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va) {
-    int len;
-    unsigned left;
-    char *next;
-    gz_statep state;
-    z_streamp strm;
-
-    /* get internal structure */
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-    strm = &(state->strm);
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return Z_STREAM_ERROR;
-
-    /* make sure we have some buffer space */
-    if (state->size == 0 && gz_init(state) == -1)
-        return state->err;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            return state->err;
-    }
-
-    /* do the printf() into the input buffer, put length in len -- the input
-       buffer is double-sized just for this function, so there is guaranteed to
-       be state->size bytes available after the current contents */
-    if (strm->avail_in == 0)
-        strm->next_in = state->in;
-    next = (char *)(state->in + (strm->next_in - state->in) + strm->avail_in);
-    next[state->size - 1] = 0;
-#ifdef NO_vsnprintf
-#  ifdef HAS_vsprintf_void
-    (void)vsprintf(next, format, va);
-    for (len = 0; len < state->size; len++)
-        if (next[len] == 0) break;
-#  else
-    len = vsprintf(next, format, va);
-#  endif
-#else
-#  ifdef HAS_vsnprintf_void
-    (void)vsnprintf(next, state->size, format, va);
-    len = strlen(next);
-#  else
-    len = vsnprintf(next, state->size, format, va);
-#  endif
-#endif
-
-    /* check that printf() results fit in buffer */
-    if (len == 0 || (unsigned)len >= state->size || next[state->size - 1] != 0)
-        return 0;
-
-    /* update buffer and position, compress first half if past that */
-    strm->avail_in += (unsigned)len;
-    state->x.pos += len;
-    if (strm->avail_in >= state->size) {
-        left = strm->avail_in - state->size;
-        strm->avail_in = state->size;
-        if (gz_comp(state, Z_NO_FLUSH) == -1)
-            return state->err;
-        memmove(state->in, state->in + state->size, left);
-        strm->next_in = state->in;
-        strm->avail_in = left;
-    }
-    return len;
-}
-
-int ZEXPORTVA gzprintf(gzFile file, const char *format, ...) {
-    va_list va;
-    int ret;
-
-    va_start(va, format);
-    ret = gzvprintf(file, format, va);
-    va_end(va);
-    return ret;
-}
-
-#else /* !STDC && !Z_HAVE_STDARG_H */
-
-/* -- see zlib.h -- */
-int ZEXPORTVA gzprintf(gzFile file, const char *format, int a1, int a2, int a3,
-                       int a4, int a5, int a6, int a7, int a8, int a9, int a10,
-                       int a11, int a12, int a13, int a14, int a15, int a16,
-                       int a17, int a18, int a19, int a20) {
-    unsigned len, left;
-    char *next;
-    gz_statep state;
-    z_streamp strm;
-
-    /* get internal structure */
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-    strm = &(state->strm);
-
-    /* check that can really pass pointer in ints */
-    if (sizeof(int) != sizeof(void *))
-        return Z_STREAM_ERROR;
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return Z_STREAM_ERROR;
-
-    /* make sure we have some buffer space */
-    if (state->size == 0 && gz_init(state) == -1)
-        return state->error;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            return state->error;
-    }
-
-    /* do the printf() into the input buffer, put length in len -- the input
-       buffer is double-sized just for this function, so there is guaranteed to
-       be state->size bytes available after the current contents */
-    if (strm->avail_in == 0)
-        strm->next_in = state->in;
-    next = (char *)(strm->next_in + strm->avail_in);
-    next[state->size - 1] = 0;
-#ifdef NO_snprintf
-#  ifdef HAS_sprintf_void
-    sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12,
-            a13, a14, a15, a16, a17, a18, a19, a20);
-    for (len = 0; len < size; len++)
-        if (next[len] == 0)
-            break;
-#  else
-    len = sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11,
-                  a12, a13, a14, a15, a16, a17, a18, a19, a20);
-#  endif
-#else
-#  ifdef HAS_snprintf_void
-    snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8, a9,
-             a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-    len = strlen(next);
-#  else
-    len = snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8,
-                   a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-#  endif
-#endif
-
-    /* check that printf() results fit in buffer */
-    if (len == 0 || len >= state->size || next[state->size - 1] != 0)
-        return 0;
-
-    /* update buffer and position, compress first half if past that */
-    strm->avail_in += len;
-    state->x.pos += len;
-    if (strm->avail_in >= state->size) {
-        left = strm->avail_in - state->size;
-        strm->avail_in = state->size;
-        if (gz_comp(state, Z_NO_FLUSH) == -1)
-            return state->err;
-        memmove(state->in, state->in + state->size, left);
-        strm->next_in = state->in;
-        strm->avail_in = left;
-    }
-    return (int)len;
-}
-
-#endif
-
-/* -- see zlib.h -- */
-int ZEXPORT gzflush(gzFile file, int flush) {
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return Z_STREAM_ERROR;
-
-    /* check flush parameter */
-    if (flush < 0 || flush > Z_FINISH)
-        return Z_STREAM_ERROR;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            return state->err;
-    }
-
-    /* compress remaining data with requested flush */
-    (void)gz_comp(state, flush);
-    return state->err;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzsetparams(gzFile file, int level, int strategy) {
-    gz_statep state;
-    z_streamp strm;
-
-    /* get internal structure */
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-    strm = &(state->strm);
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK || state->direct)
-        return Z_STREAM_ERROR;
-
-    /* if no change is requested, then do nothing */
-    if (level == state->level && strategy == state->strategy)
-        return Z_OK;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            return state->err;
-    }
-
-    /* change compression parameters for subsequent input */
-    if (state->size) {
-        /* flush previous input with previous parameters before changing */
-        if (strm->avail_in && gz_comp(state, Z_BLOCK) == -1)
-            return state->err;
-        deflateParams(strm, level, strategy);
-    }
-    state->level = level;
-    state->strategy = strategy;
-    return Z_OK;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzclose_w(gzFile file) {
-    int ret = Z_OK;
-    gz_statep state;
-
-    /* get internal structure */
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-
-    /* check that we're writing */
-    if (state->mode != GZ_WRITE)
-        return Z_STREAM_ERROR;
-
-    /* check for seek request */
-    if (state->seek) {
-        state->seek = 0;
-        if (gz_zero(state, state->skip) == -1)
-            ret = state->err;
-    }
-
-    /* flush, free memory, and close file */
-    if (gz_comp(state, Z_FINISH) == -1)
-        ret = state->err;
-    if (state->size) {
-        if (!state->direct) {
-            (void)deflateEnd(&(state->strm));
-            free(state->out);
-        }
-        free(state->in);
-    }
-    gz_error(state, Z_OK, NULL);
-    free(state->path);
-    if (close(state->fd) == -1)
-        ret = Z_ERRNO;
-    free(state);
-    return ret;
-}