diff options
Diffstat (limited to 'src/image.c')
| -rw-r--r-- | src/image.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/src/image.c b/src/image.c index d4e54fb7dcd..6803dbe8f00 100644 --- a/src/image.c +++ b/src/image.c @@ -5514,6 +5514,13 @@ init_png_functions (Lisp_Object libraries) #endif /* HAVE_NTGUI */ +/* Possibly inefficient/inexact substitutes for _setjmp and _longjmp. + Do not use sys_setjmp, as PNG supports only jmp_buf. The _longjmp + substitute may munge the signal mask, but that should be OK here. */ +#ifndef HAVE__SETJMP +# define _setjmp(j) setjmp (j) +# define _longjmp longjmp +#endif #if (PNG_LIBPNG_VER < 10500) #define PNG_LONGJMP(ptr) (_longjmp ((ptr)->jmpbuf, 1)) @@ -5593,7 +5600,7 @@ png_read_from_file (png_structp png_ptr, png_bytep data, png_size_t length) struct png_load_context { - /* These are members so that _longjmp doesn't munge local variables. */ + /* These are members so that longjmp doesn't munge local variables. */ png_struct *png_ptr; png_info *info_ptr; png_info *end_info; @@ -6129,9 +6136,9 @@ jpeg_resync_to_restart_wrapper (j_decompress_ptr cinfo, int desired) struct my_jpeg_error_mgr { struct jpeg_error_mgr pub; - jmp_buf setjmp_buffer; + sys_jmp_buf setjmp_buffer; - /* The remaining members are so that _longjmp doesn't munge local + /* The remaining members are so that longjmp doesn't munge local variables. */ struct jpeg_decompress_struct cinfo; enum @@ -6151,7 +6158,7 @@ my_error_exit (j_common_ptr cinfo) { struct my_jpeg_error_mgr *mgr = (struct my_jpeg_error_mgr *) cinfo->err; mgr->failure_code = MY_JPEG_ERROR_EXIT; - _longjmp (mgr->setjmp_buffer, 1); + sys_longjmp (mgr->setjmp_buffer, 1); } @@ -6401,7 +6408,7 @@ jpeg_load_body (struct frame *f, struct image *img, error is detected. This function will perform a longjmp. */ mgr->cinfo.err = fn_jpeg_std_error (&mgr->pub); mgr->pub.error_exit = my_error_exit; - if (_setjmp (mgr->setjmp_buffer)) + if (sys_setjmp (mgr->setjmp_buffer)) { switch (mgr->failure_code) { @@ -6460,14 +6467,14 @@ jpeg_load_body (struct frame *f, struct image *img, if (!check_image_size (f, width, height)) { mgr->failure_code = MY_JPEG_INVALID_IMAGE_SIZE; - _longjmp (mgr->setjmp_buffer, 1); + sys_longjmp (mgr->setjmp_buffer, 1); } /* Create X image and pixmap. */ if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) { mgr->failure_code = MY_JPEG_CANNOT_CREATE_X; - _longjmp (mgr->setjmp_buffer, 1); + sys_longjmp (mgr->setjmp_buffer, 1); } /* Allocate colors. When color quantization is used, |