/* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004, 2010, 2011, 2012 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
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 */
const char *mode;
{
gz_statep state;
+ z_size_t len;
int oflag;
#ifdef O_CLOEXEC
int cloexec = 0;
return NULL;
/* allocate gzFile structure to return */
- state = malloc(sizeof(gz_state));
+ state = (gz_statep)malloc(sizeof(gz_state));
if (state == NULL)
return NULL;
state->size = 0; /* no buffers allocated yet */
break;
case 'F':
state->strategy = Z_FIXED;
+ break;
case 'T':
state->direct = 1;
+ break;
default: /* could consider as an error, but just ignore */
;
}
}
/* save the path name for error messages */
-# define WPATH "<widepath>"
- state->path = malloc(strlen(fd == -2 ? WPATH : path) + 1);
+#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;
}
- strcpy(state->path, fd == -2 ? WPATH : path);
+#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 =
/* open the file with the appropriate flags (or just use fd) */
state->fd = fd > -1 ? fd : (
-#ifdef _WIN32
+#ifdef WIDECHAR
fd == -2 ? _wopen(path, oflag, 0666) :
#endif
- open(path, oflag, 0666));
+ open((const char *)path, oflag, 0666));
if (state->fd == -1) {
free(state->path);
free(state);
return NULL;
}
- if (state->mode == GZ_APPEND)
+ 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) {
char *path; /* identifier for error messages */
gzFile gz;
- if (fd == -1 || (path = malloc(7 + 3 * sizeof(int))) == NULL)
+ 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;
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;
/* 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);
+ ret = LSEEK(state->fd, offset - (z_off64_t)state->x.have, SEEK_CUR);
if (ret == -1)
return -1;
state->x.have = 0;
/* return error information */
if (errnum != NULL)
*errnum = state->err;
- return state->msg == NULL ? "" : state->msg;
+ return state->err == Z_MEM_ERROR ? "out of memory" :
+ (state->msg == NULL ? "" : state->msg);
}
/* -- see zlib.h -- */
if (msg == NULL)
return;
- /* for an out of memory error, save as static string */
- if (err == Z_MEM_ERROR) {
- state->msg = (char *)msg;
+ /* 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 = malloc(strlen(state->path) + strlen(msg) + 3)) == NULL) {
+ if ((state->msg = (char *)malloc(strlen(state->path) + strlen(msg) + 3)) ==
+ NULL) {
state->err = Z_MEM_ERROR;
- state->msg = (char *)"out of memory";
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);
- return;
+#endif
}
#ifndef INT_MAX