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| author | Tor Andersson <tor.andersson@artifex.com> | 2018-01-03 15:11:33 +0100 |
|---|---|---|
| committer | Tor Andersson <tor.andersson@artifex.com> | 2018-01-04 13:15:42 +0100 |
| commit | 2d5b4683e912d6e6e1f1e2ca5aa0297beb3e6807 (patch) | |
| tree | de2343f1280afd1ae32a1b8d7805a42f0fc5f8e7 /include/mupdf/fitz/context.h | |
| parent | a292539cc9e5e91843d48e691038d9c1b529422c (diff) | |
| download | mupdf-2d5b4683e912d6e6e1f1e2ca5aa0297beb3e6807.tar.xz | |
Add portable pseudo-random number generator based on the lrand48 family.
Diffstat (limited to 'include/mupdf/fitz/context.h')
| -rw-r--r-- | include/mupdf/fitz/context.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/mupdf/fitz/context.h b/include/mupdf/fitz/context.h index 5a88433f..caa22977 100644 --- a/include/mupdf/fitz/context.h +++ b/include/mupdf/fitz/context.h @@ -161,6 +161,7 @@ struct fz_context_s fz_tuning_context *tuning; fz_document_handler_context *handler; fz_output_context *output; + uint16_t seed48[7]; }; /* @@ -563,4 +564,23 @@ extern fz_alloc_context fz_alloc_default; /* Default locks */ extern fz_locks_context fz_locks_default; +/* + Pseudo-random numbers using a linear congruential algorithm and 48-bit + integer arithmetic. +*/ +double fz_drand48(fz_context *ctx); +int32_t fz_lrand48(fz_context *ctx); +int32_t fz_mrand48(fz_context *ctx); +double fz_erand48(fz_context *ctx, uint16_t xsubi[3]); +int32_t fz_jrand48(fz_context *ctx, uint16_t xsubi[3]); +int32_t fz_nrand48(fz_context *ctx, uint16_t xsubi[3]); +void fz_lcong48(fz_context *ctx, uint16_t param[7]); +uint16_t *fz_seed48(fz_context *ctx, uint16_t seed16v[3]); +void fz_srand48(fz_context *ctx, int32_t seedval); + +/* + fz_memrnd: Fill block with len bytes of pseudo-randomness. +*/ +void fz_memrnd(fz_context *ctx, uint8_t *block, int len); + #endif |