diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /other-licenses/7zstub/src/C/Bcj2.h | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'other-licenses/7zstub/src/C/Bcj2.h')
| -rw-r--r-- | other-licenses/7zstub/src/C/Bcj2.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/C/Bcj2.h b/other-licenses/7zstub/src/C/Bcj2.h new file mode 100644 index 0000000000..68893d2d12 --- /dev/null +++ b/other-licenses/7zstub/src/C/Bcj2.h @@ -0,0 +1,146 @@ +/* Bcj2.h -- BCJ2 Converter for x86 code
+2014-11-10 : Igor Pavlov : Public domain */
+
+#ifndef __BCJ2_H
+#define __BCJ2_H
+
+#include "7zTypes.h"
+
+EXTERN_C_BEGIN
+
+#define BCJ2_NUM_STREAMS 4
+
+enum
+{
+ BCJ2_STREAM_MAIN,
+ BCJ2_STREAM_CALL,
+ BCJ2_STREAM_JUMP,
+ BCJ2_STREAM_RC
+};
+
+enum
+{
+ BCJ2_DEC_STATE_ORIG_0 = BCJ2_NUM_STREAMS,
+ BCJ2_DEC_STATE_ORIG_1,
+ BCJ2_DEC_STATE_ORIG_2,
+ BCJ2_DEC_STATE_ORIG_3,
+
+ BCJ2_DEC_STATE_ORIG,
+ BCJ2_DEC_STATE_OK
+};
+
+enum
+{
+ BCJ2_ENC_STATE_ORIG = BCJ2_NUM_STREAMS,
+ BCJ2_ENC_STATE_OK
+};
+
+
+#define BCJ2_IS_32BIT_STREAM(s) ((s) == BCJ2_STREAM_CALL || (s) == BCJ2_STREAM_JUMP)
+
+/*
+CBcj2Dec / CBcj2Enc
+bufs sizes:
+ BUF_SIZE(n) = lims[n] - bufs[n]
+bufs sizes for BCJ2_STREAM_CALL and BCJ2_STREAM_JUMP must be mutliply of 4:
+ (BUF_SIZE(BCJ2_STREAM_CALL) & 3) == 0
+ (BUF_SIZE(BCJ2_STREAM_JUMP) & 3) == 0
+*/
+
+/*
+CBcj2Dec:
+dest is allowed to overlap with bufs[BCJ2_STREAM_MAIN], with the following conditions:
+ bufs[BCJ2_STREAM_MAIN] >= dest &&
+ bufs[BCJ2_STREAM_MAIN] - dest >= tempReserv +
+ BUF_SIZE(BCJ2_STREAM_CALL) +
+ BUF_SIZE(BCJ2_STREAM_JUMP)
+ tempReserv = 0 : for first call of Bcj2Dec_Decode
+ tempReserv = 4 : for any other calls of Bcj2Dec_Decode
+ overlap with offset = 1 is not allowed
+*/
+
+typedef struct
+{
+ const Byte *bufs[BCJ2_NUM_STREAMS];
+ const Byte *lims[BCJ2_NUM_STREAMS];
+ Byte *dest;
+ const Byte *destLim;
+
+ unsigned state; /* BCJ2_STREAM_MAIN has more priority than BCJ2_STATE_ORIG */
+
+ UInt32 ip;
+ Byte temp[4];
+ UInt32 range;
+ UInt32 code;
+ UInt16 probs[2 + 256];
+} CBcj2Dec;
+
+void Bcj2Dec_Init(CBcj2Dec *p);
+
+/* Returns: SZ_OK or SZ_ERROR_DATA */
+SRes Bcj2Dec_Decode(CBcj2Dec *p);
+
+#define Bcj2Dec_IsFinished(_p_) ((_p_)->code == 0)
+
+
+
+typedef enum
+{
+ BCJ2_ENC_FINISH_MODE_CONTINUE,
+ BCJ2_ENC_FINISH_MODE_END_BLOCK,
+ BCJ2_ENC_FINISH_MODE_END_STREAM
+} EBcj2Enc_FinishMode;
+
+typedef struct
+{
+ Byte *bufs[BCJ2_NUM_STREAMS];
+ const Byte *lims[BCJ2_NUM_STREAMS];
+ const Byte *src;
+ const Byte *srcLim;
+
+ unsigned state;
+ EBcj2Enc_FinishMode finishMode;
+
+ Byte prevByte;
+
+ Byte cache;
+ UInt32 range;
+ UInt64 low;
+ UInt64 cacheSize;
+
+ UInt32 ip;
+
+ /* 32-bit ralative offset in JUMP/CALL commands is
+ - (mod 4 GB) in 32-bit mode
+ - signed Int32 in 64-bit mode
+ We use (mod 4 GB) check for fileSize.
+ Use fileSize up to 2 GB, if you want to support 32-bit and 64-bit code conversion. */
+ UInt32 fileIp;
+ UInt32 fileSize; /* (fileSize <= ((UInt32)1 << 31)), 0 means no_limit */
+ UInt32 relatLimit; /* (relatLimit <= ((UInt32)1 << 31)), 0 means desable_conversion */
+
+ UInt32 tempTarget;
+ unsigned tempPos;
+ Byte temp[4 * 2];
+
+ unsigned flushPos;
+
+ UInt16 probs[2 + 256];
+} CBcj2Enc;
+
+void Bcj2Enc_Init(CBcj2Enc *p);
+void Bcj2Enc_Encode(CBcj2Enc *p);
+
+#define Bcj2Enc_Get_InputData_Size(p) ((SizeT)((p)->srcLim - (p)->src) + (p)->tempPos)
+#define Bcj2Enc_IsFinished(p) ((p)->flushPos == 5)
+
+
+#define BCJ2_RELAT_LIMIT_NUM_BITS 26
+#define BCJ2_RELAT_LIMIT ((UInt32)1 << BCJ2_RELAT_LIMIT_NUM_BITS)
+
+/* limit for CBcj2Enc::fileSize variable */
+#define BCJ2_FileSize_MAX ((UInt32)1 << 31)
+
+EXTERN_C_END
+
+#endif
|