74     if (state->mode == GZ_READ) {   /* for reading ... */
87 local gzFile gz_open(path, fd, mode)  in gz_open()  argument
90     const char *mode;
103     state->mode = GZ_NONE;
106     while (*mode) {
107         if (*mode >= '0' && *mode <= '9')
108             state->level = *mode - '0';
110             switch (*mode) {
112                 state->mode = GZ_READ;
116                 state->mode = GZ_WRITE;
119                 state->mode = GZ_APPEND;
141         mode++;
145     if (state->mode == GZ_NONE) {
167             (state->mode == GZ_READ ?
170                     state->mode == GZ_WRITE ?
179     if (state->mode == GZ_APPEND)
180         state->mode = GZ_WRITE;         /* simplify later checks */
183     if (state->mode == GZ_READ) {
196 gzFile ZEXPORT gzopen(path, mode)  in gzopen()  argument
198     const char *mode;
200     return gz_open(path, -1, mode);
204 gzFile ZEXPORT gzopen64(path, mode)  in gzopen64()  argument
206     const char *mode;
208     return gz_open(path, -1, mode);
212 gzFile ZEXPORT gzdopen(fd, mode)  in gzdopen()  argument
214     const char *mode;
222     gz = gz_open(path, fd, mode);
238     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
264     if (state->mode != GZ_READ || state->err != Z_OK)
288     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
307     if (state->mode == GZ_READ && state->how == COPY &&
323         if (state->mode != GZ_READ)         /* writing -- can't go backwards */
333     if (state->mode == GZ_READ) {
372     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
400     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
407     if (state->mode == GZ_READ)             /* reading */
432     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
436     return state->mode == GZ_READ ?
451     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
470     if (state->mode != GZ_READ && state->mode != GZ_WRITE)
474     if (state->mode == GZ_READ)