diff options
Diffstat (limited to 'generic/tkImgGIF.c')
| -rw-r--r-- | generic/tkImgGIF.c | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/generic/tkImgGIF.c b/generic/tkImgGIF.c index be90f06..ed4868b 100644 --- a/generic/tkImgGIF.c +++ b/generic/tkImgGIF.c @@ -55,7 +55,7 @@ typedef struct mFile { unsigned char *data; /* mmencoded source string */ int c; /* bits left over from previous character */ int state; /* decoder state (0-4 or GIF_DONE) */ - int length; /* Total amount of bytes in data */ + size_t length; /* Total amount of bytes in data */ } MFile; /* @@ -187,9 +187,9 @@ static int ReadImage(GIFImageConfig *gifConfPtr, * these are for the BASE64 image reader code only */ -static int Fread(GIFImageConfig *gifConfPtr, unsigned char *dst, +static size_t Fread(GIFImageConfig *gifConfPtr, unsigned char *dst, size_t size, size_t count, Tcl_Channel chan); -static int Mread(unsigned char *dst, size_t size, size_t count, +static size_t Mread(unsigned char *dst, size_t size, size_t count, MFile *handle); static int Mgetc(MFile *handle); static int char64(int c); @@ -917,7 +917,7 @@ ReadColorMap( unsigned char rgb[3]; for (i = 0; i < number; ++i) { - if (Fread(gifConfPtr, rgb, sizeof(rgb), 1, chan) <= 0) { + if (((size_t)Fread(gifConfPtr, rgb, sizeof(rgb), 1, chan) + 1) < 2) { return 0; } @@ -983,11 +983,11 @@ GetDataBlock( { unsigned char count; - if (Fread(gifConfPtr, &count, 1, 1, chan) <= 0) { + if (((size_t)Fread(gifConfPtr, &count, 1, 1, chan) + 1) < 2) { return -1; } - if ((count != 0) && (Fread(gifConfPtr, buf, count, 1, chan) <= 0)) { + if ((count != 0) && (((size_t)Fread(gifConfPtr, buf, count, 1, chan) + 1) < 2)) { return -1; } @@ -1049,7 +1049,7 @@ ReadImage( * Initialize the decoder */ - if (Fread(gifConfPtr, &initialCodeSize, 1, 1, chan) <= 0) { + if (((size_t)Fread(gifConfPtr, &initialCodeSize, 1, 1, chan) + 1) < 2) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "error reading GIF image: %s", Tcl_PosixError(interp))); return TCL_ERROR; @@ -1403,15 +1403,15 @@ mInit( *---------------------------------------------------------------------- */ -static int +static size_t Mread( unsigned char *dst, /* where to put the result */ size_t chunkSize, /* size of each transfer */ size_t numChunks, /* number of chunks */ MFile *handle) /* mmdecode "file" handle */ { - register int i, c; - int count = chunkSize * numChunks; + int c; + size_t i, count = chunkSize * numChunks; for (i=0; i<count && (c=Mgetc(handle)) != GIF_DONE; i++) { *dst++ = c; @@ -1552,7 +1552,7 @@ char64( *---------------------------------------------------------------------- */ -static int +static size_t Fread( GIFImageConfig *gifConfPtr, unsigned char *dst, /* where to put the result */ @@ -1566,20 +1566,20 @@ Fread( if (gifConfPtr->fromData == INLINE_DATA_BINARY) { MFile *handle = (MFile *) chan; - if (handle->length <= 0 || (size_t) handle->length < hunk*count) { - return -1; + if ((handle->length + 1 < 2) || (handle->length < hunk*count)) { + return (size_t)-1; } - memcpy(dst, handle->data, (size_t) (hunk * count)); + memcpy(dst, handle->data, hunk * count); handle->data += hunk * count; handle->length -= hunk * count; - return (int)(hunk * count); + return hunk * count; } /* * Otherwise we've got a real file to read. */ - return Tcl_Read(chan, (char *) dst, (int) (hunk * count)); + return Tcl_Read(chan, (char *) dst, hunk * count); } /* |