79     if (state->mode == GZ_READ) {   /* for reading ... */
91 local gzFile gz_open(path, fd, mode)  in gz_open()  argument
94     const char *mode;
119     state->mode = GZ_NONE;
123     while (*mode) {
124         if (*mode >= '0' && *mode <= '9')
125             state->level = *mode - '0';
127             switch (*mode) {
129                 state->mode = GZ_READ;
133                 state->mode = GZ_WRITE;
136                 state->mode = GZ_APPEND;
172         mode++;
176     if (state->mode == GZ_NONE) {
182     if (state->mode == GZ_READ) {
230         (state->mode == GZ_READ ?
236           (state->mode == GZ_WRITE ?
251     if (state->mode == GZ_APPEND) {
253         state->mode = GZ_WRITE;         /* simplify later checks */
257     if (state->mode == GZ_READ) {
270 gzFile ZEXPORT gzopen(path, mode)  in gzopen()  argument
272     const char *mode;
274     return gz_open(path, -1, mode);
278 gzFile ZEXPORT gzopen64(path, mode)  in gzopen64()  argument
280     const char *mode;
282     return gz_open(path, -1, mode);
286 gzFile ZEXPORT gzdopen(fd, mode)  in gzdopen()  argument
288     const char *mode;
300     gz = gz_open(path, fd, mode);
307 gzFile ZEXPORT gzopen_w(path, mode)  in gzopen_w()  argument
309     const char *mode;
311     return gz_open(path, -2, mode);
326     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
354     if (state->mode != GZ_READ ||
379     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
398     if (state->mode == GZ_READ && state->how == COPY &&
415         if (state->mode != GZ_READ)         /* writing -- can't go backwards */
425     if (state->mode == GZ_READ) {
464     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
492     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
499     if (state->mode == GZ_READ)             /* reading */
524     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
528     return state->mode == GZ_READ ? state->past : 0;
542     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
562     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
566     if (state->mode == GZ_READ) {