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| 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/7zStream.c | |
| 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/7zStream.c')
| -rw-r--r-- | other-licenses/7zstub/src/C/7zStream.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/C/7zStream.c b/other-licenses/7zstub/src/C/7zStream.c new file mode 100644 index 0000000000..579741fadc --- /dev/null +++ b/other-licenses/7zstub/src/C/7zStream.c @@ -0,0 +1,176 @@ +/* 7zStream.c -- 7z Stream functions
+2017-04-03 : Igor Pavlov : Public domain */
+
+#include "Precomp.h"
+
+#include <string.h>
+
+#include "7zTypes.h"
+
+SRes SeqInStream_Read2(const ISeqInStream *stream, void *buf, size_t size, SRes errorType)
+{
+ while (size != 0)
+ {
+ size_t processed = size;
+ RINOK(ISeqInStream_Read(stream, buf, &processed));
+ if (processed == 0)
+ return errorType;
+ buf = (void *)((Byte *)buf + processed);
+ size -= processed;
+ }
+ return SZ_OK;
+}
+
+SRes SeqInStream_Read(const ISeqInStream *stream, void *buf, size_t size)
+{
+ return SeqInStream_Read2(stream, buf, size, SZ_ERROR_INPUT_EOF);
+}
+
+SRes SeqInStream_ReadByte(const ISeqInStream *stream, Byte *buf)
+{
+ size_t processed = 1;
+ RINOK(ISeqInStream_Read(stream, buf, &processed));
+ return (processed == 1) ? SZ_OK : SZ_ERROR_INPUT_EOF;
+}
+
+
+
+SRes LookInStream_SeekTo(const ILookInStream *stream, UInt64 offset)
+{
+ Int64 t = offset;
+ return ILookInStream_Seek(stream, &t, SZ_SEEK_SET);
+}
+
+SRes LookInStream_LookRead(const ILookInStream *stream, void *buf, size_t *size)
+{
+ const void *lookBuf;
+ if (*size == 0)
+ return SZ_OK;
+ RINOK(ILookInStream_Look(stream, &lookBuf, size));
+ memcpy(buf, lookBuf, *size);
+ return ILookInStream_Skip(stream, *size);
+}
+
+SRes LookInStream_Read2(const ILookInStream *stream, void *buf, size_t size, SRes errorType)
+{
+ while (size != 0)
+ {
+ size_t processed = size;
+ RINOK(ILookInStream_Read(stream, buf, &processed));
+ if (processed == 0)
+ return errorType;
+ buf = (void *)((Byte *)buf + processed);
+ size -= processed;
+ }
+ return SZ_OK;
+}
+
+SRes LookInStream_Read(const ILookInStream *stream, void *buf, size_t size)
+{
+ return LookInStream_Read2(stream, buf, size, SZ_ERROR_INPUT_EOF);
+}
+
+
+
+#define GET_LookToRead2 CLookToRead2 *p = CONTAINER_FROM_VTBL(pp, CLookToRead2, vt);
+
+static SRes LookToRead2_Look_Lookahead(const ILookInStream *pp, const void **buf, size_t *size)
+{
+ SRes res = SZ_OK;
+ GET_LookToRead2
+ size_t size2 = p->size - p->pos;
+ if (size2 == 0 && *size != 0)
+ {
+ p->pos = 0;
+ p->size = 0;
+ size2 = p->bufSize;
+ res = ISeekInStream_Read(p->realStream, p->buf, &size2);
+ p->size = size2;
+ }
+ if (*size > size2)
+ *size = size2;
+ *buf = p->buf + p->pos;
+ return res;
+}
+
+static SRes LookToRead2_Look_Exact(const ILookInStream *pp, const void **buf, size_t *size)
+{
+ SRes res = SZ_OK;
+ GET_LookToRead2
+ size_t size2 = p->size - p->pos;
+ if (size2 == 0 && *size != 0)
+ {
+ p->pos = 0;
+ p->size = 0;
+ if (*size > p->bufSize)
+ *size = p->bufSize;
+ res = ISeekInStream_Read(p->realStream, p->buf, size);
+ size2 = p->size = *size;
+ }
+ if (*size > size2)
+ *size = size2;
+ *buf = p->buf + p->pos;
+ return res;
+}
+
+static SRes LookToRead2_Skip(const ILookInStream *pp, size_t offset)
+{
+ GET_LookToRead2
+ p->pos += offset;
+ return SZ_OK;
+}
+
+static SRes LookToRead2_Read(const ILookInStream *pp, void *buf, size_t *size)
+{
+ GET_LookToRead2
+ size_t rem = p->size - p->pos;
+ if (rem == 0)
+ return ISeekInStream_Read(p->realStream, buf, size);
+ if (rem > *size)
+ rem = *size;
+ memcpy(buf, p->buf + p->pos, rem);
+ p->pos += rem;
+ *size = rem;
+ return SZ_OK;
+}
+
+static SRes LookToRead2_Seek(const ILookInStream *pp, Int64 *pos, ESzSeek origin)
+{
+ GET_LookToRead2
+ p->pos = p->size = 0;
+ return ISeekInStream_Seek(p->realStream, pos, origin);
+}
+
+void LookToRead2_CreateVTable(CLookToRead2 *p, int lookahead)
+{
+ p->vt.Look = lookahead ?
+ LookToRead2_Look_Lookahead :
+ LookToRead2_Look_Exact;
+ p->vt.Skip = LookToRead2_Skip;
+ p->vt.Read = LookToRead2_Read;
+ p->vt.Seek = LookToRead2_Seek;
+}
+
+
+
+static SRes SecToLook_Read(const ISeqInStream *pp, void *buf, size_t *size)
+{
+ CSecToLook *p = CONTAINER_FROM_VTBL(pp, CSecToLook, vt);
+ return LookInStream_LookRead(p->realStream, buf, size);
+}
+
+void SecToLook_CreateVTable(CSecToLook *p)
+{
+ p->vt.Read = SecToLook_Read;
+}
+
+static SRes SecToRead_Read(const ISeqInStream *pp, void *buf, size_t *size)
+{
+ CSecToRead *p = CONTAINER_FROM_VTBL(pp, CSecToRead, vt);
+ return ILookInStream_Read(p->realStream, buf, size);
+}
+
+void SecToRead_CreateVTable(CSecToRead *p)
+{
+ p->vt.Read = SecToRead_Read;
+}
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