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Increase token buffer to 256 bytes, to avoid overflow scenarios.

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Add _pdfioTokenFlush to manually flush the token buffer.

Add more debug printfs.
This commit is contained in:
Michael R Sweet
2021-05-10 17:37:57 -04:00
parent cfb5ca0ddc
commit 18853ca3d5
7 changed files with 93 additions and 37 deletions
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21
pdfio-private.h
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@ -47,10 +47,10 @@
//
# ifdef DEBUG
# define PDFIO_DEBUG(...) fprintf(stderr, __VA_ARGS__)
# define PDFIO_DEBUG_ARRAY(array) _pdfioArrayDebug(array, stderr)
# define PDFIO_DEBUG_DICT(dict) _pdfioDictDebug(dict, stderr)
# define PDFIO_DEBUG_VALUE(value) _pdfioValueDebug(value, stderr)
# define PDFIO_DEBUG(...) fprintf(stderr, __VA_ARGS__)
# define PDFIO_DEBUG_ARRAY(array) _pdfioArrayDebug(array, stderr)
# define PDFIO_DEBUG_DICT(dict) _pdfioDictDebug(dict, stderr)
# define PDFIO_DEBUG_VALUE(value) _pdfioValueDebug(value, stderr)
# else
# define PDFIO_DEBUG(...)
# define PDFIO_DEBUG_ARRAY(array)
@ -89,7 +89,7 @@ typedef struct _pdfio_token_s // Token buffer/stack
_pdfio_tconsume_cb_t consume_cb; // Consume callback
_pdfio_tpeek_cb_t peek_cb; // Peek callback
void *cb_data; // Callback data
unsigned char buffer[32], // Buffer
unsigned char buffer[256], // Buffer
*bufptr, // Pointer into buffer
*bufend; // Last valid byte in buffer
size_t num_tokens; // Number of tokens in stack
@ -252,11 +252,12 @@ extern pdfio_stream_t *_pdfioStreamOpen(pdfio_obj_t *obj, bool decode) PDFIO_INT
extern bool _pdfioStringIsAllocated(pdfio_file_t *pdf, const char *s) PDFIO_INTERNAL;
extern void _pdfioTokenClear(_pdfio_token_t *ts) PDFIO_INTERNAL;
extern bool _pdfioTokenGet(_pdfio_token_t *ts, char *buffer, size_t bufsize) PDFIO_INTERNAL;
extern void _pdfioTokenInit(_pdfio_token_t *ts, pdfio_file_t *pdf, _pdfio_tconsume_cb_t consume_cb, _pdfio_tpeek_cb_t peek_cb, void *cb_data);
extern void _pdfioTokenPush(_pdfio_token_t *ts, const char *token) PDFIO_INTERNAL;
extern bool _pdfioTokenRead(_pdfio_token_t *ts, char *buffer, size_t bufsize);
extern void _pdfioTokenClear(_pdfio_token_t *tb) PDFIO_INTERNAL;
extern void _pdfioTokenFlush(_pdfio_token_t *tb) PDFIO_INTERNAL;
extern bool _pdfioTokenGet(_pdfio_token_t *tb, char *buffer, size_t bufsize) PDFIO_INTERNAL;
extern void _pdfioTokenInit(_pdfio_token_t *tb, pdfio_file_t *pdf, _pdfio_tconsume_cb_t consume_cb, _pdfio_tpeek_cb_t peek_cb, void *cb_data);
extern void _pdfioTokenPush(_pdfio_token_t *tb, const char *token) PDFIO_INTERNAL;
extern bool _pdfioTokenRead(_pdfio_token_t *tb, char *buffer, size_t bufsize);
extern _pdfio_value_t *_pdfioValueCopy(pdfio_file_t *pdfdst, _pdfio_value_t *vdst, pdfio_file_t *pdfsrc, _pdfio_value_t *vsrc) PDFIO_INTERNAL;
extern void _pdfioValueDebug(_pdfio_value_t *v, FILE *fp) PDFIO_INTERNAL;