/src/xz/src/liblzma/common/common.c

Source
// SPDX-License-Identifier: 0BSD

///////////////////////////////////////////////////////////////////////////////
//
/// \file       common.c
/// \brief      Common functions needed in many places in liblzma
//
//  Author:     Lasse Collin
//
///////////////////////////////////////////////////////////////////////////////

#include "common.h"


/////////////
// Version //
/////////////

extern LZMA_API(uint32_t)
lzma_version_number(void)
{
  return LZMA_VERSION;
}


extern LZMA_API(const char *)
lzma_version_string(void)
{
  return LZMA_VERSION_STRING;
}


///////////////////////
// Memory allocation //
///////////////////////

lzma_attr_alloc_size(1)
extern void *
lzma_alloc(size_t size, const lzma_allocator *allocator)
{
  // Some malloc() variants return NULL if called with size == 0.
  if (size == 0)
    size = 1;

  void *ptr;

  if (allocator != NULL && allocator->alloc != NULL)
    ptr = allocator->alloc(allocator->opaque, 1, size);
  else
    ptr = malloc(size);

  return ptr;
}


lzma_attr_alloc_size(1)
extern void *
lzma_alloc_zero(size_t size, const lzma_allocator *allocator)
{
  // Some calloc() variants return NULL if called with size == 0.
  if (size == 0)
    size = 1;

  void *ptr;

  if (allocator != NULL && allocator->alloc != NULL) {
    ptr = allocator->alloc(allocator->opaque, 1, size);
    if (ptr != NULL)
      memzero(ptr, size);
  } else {
    ptr = calloc(1, size);
  }

  return ptr;
}


extern void
lzma_free(void *ptr, const lzma_allocator *allocator)
{
  if (allocator != NULL && allocator->free != NULL)
    allocator->free(allocator->opaque, ptr);
  else
    free(ptr);

  return;
}


//////////
// Misc //
//////////

extern size_t
lzma_bufcpy(const uint8_t *restrict in, size_t *restrict in_pos,
    size_t in_size, uint8_t *restrict out,
    size_t *restrict out_pos, size_t out_size)
{
  assert(in != NULL || *in_pos == in_size);
  assert(out != NULL || *out_pos == out_size);

  assert(*in_pos <= in_size);
  assert(*out_pos <= out_size);

  const size_t in_avail = in_size - *in_pos;
  const size_t out_avail = out_size - *out_pos;
  const size_t copy_size = my_min(in_avail, out_avail);

  // Call memcpy() only if there is something to copy. If there is
  // nothing to copy, in or out might be NULL and then the memcpy()
  // call would trigger undefined behavior.
  if (copy_size > 0)
    memcpy(out + *out_pos, in + *in_pos, copy_size);

  *in_pos += copy_size;
  *out_pos += copy_size;

  return copy_size;
}


extern lzma_ret
lzma_next_filter_init(lzma_next_coder *next, const lzma_allocator *allocator,
    const lzma_filter_info *filters)
{
  lzma_next_coder_init(filters[0].init, next, allocator);
  next->id = filters[0].id;
  return filters[0].init == NULL
      ? LZMA_OK : filters[0].init(next, allocator, filters);
}


extern lzma_ret
lzma_next_filter_update(lzma_next_coder *next, const lzma_allocator *allocator,
    const lzma_filter *reversed_filters)
{
  // Check that the application isn't trying to change the Filter ID.
  // End of filters is indicated with LZMA_VLI_UNKNOWN in both
  // reversed_filters[0].id and next->id.
  if (reversed_filters[0].id != next->id)
    return LZMA_PROG_ERROR;

  if (reversed_filters[0].id == LZMA_VLI_UNKNOWN)
    return LZMA_OK;

  assert(next->update != NULL);
  return next->update(next->coder, allocator, NULL, reversed_filters);
}


extern void
lzma_next_end(lzma_next_coder *next, const lzma_allocator *allocator)
{
  if (next->init != (uintptr_t)(NULL)) {
    // To avoid tiny end functions that simply call
    // lzma_free(coder, allocator), we allow leaving next->end
    // NULL and call lzma_free() here.
    if (next->end != NULL)
      next->end(next->coder, allocator);
    else
      lzma_free(next->coder, allocator);

    // Reset the variables so the we don't accidentally think
    // that it is an already initialized coder.
    *next = LZMA_NEXT_CODER_INIT;
  }

  return;
}


//////////////////////////////////////
// External to internal API wrapper //
//////////////////////////////////////

extern lzma_ret
lzma_strm_init(lzma_stream *strm)
{
  if (strm == NULL)
    return LZMA_PROG_ERROR;

  if (strm->internal == NULL) {
    strm->internal = lzma_alloc(sizeof(lzma_internal),
        strm->allocator);
    if (strm->internal == NULL)
      return LZMA_MEM_ERROR;

    strm->internal->next = LZMA_NEXT_CODER_INIT;
  }

  memzero(strm->internal->supported_actions,
      sizeof(strm->internal->supported_actions));
  strm->internal->sequence = ISEQ_RUN;
  strm->internal->allow_buf_error = false;

  strm->total_in = 0;
  strm->total_out = 0;

  return LZMA_OK;
}


extern LZMA_API(lzma_ret)
lzma_code(lzma_stream *strm, lzma_action action)
{
  // Sanity checks
  if ((strm->next_in == NULL && strm->avail_in != 0)
      || (strm->next_out == NULL && strm->avail_out != 0)
      || strm->internal == NULL
      || strm->internal->next.code == NULL
      || (unsigned int)(action) > LZMA_ACTION_MAX
      || !strm->internal->supported_actions[action])
    return LZMA_PROG_ERROR;

  // Check if unsupported members have been set to non-zero or non-NULL,
  // which would indicate that some new feature is wanted.
  if (strm->reserved_ptr1 != NULL
      || strm->reserved_ptr2 != NULL
      || strm->reserved_ptr3 != NULL
      || strm->reserved_ptr4 != NULL
      || strm->reserved_int2 != 0
      || strm->reserved_int3 != 0
      || strm->reserved_int4 != 0
      || strm->reserved_enum1 != LZMA_RESERVED_ENUM
      || strm->reserved_enum2 != LZMA_RESERVED_ENUM)
    return LZMA_OPTIONS_ERROR;

  switch (strm->internal->sequence) {
  case ISEQ_RUN:
    switch (action) {
    case LZMA_RUN:
      break;

    case LZMA_SYNC_FLUSH:
      strm->internal->sequence = ISEQ_SYNC_FLUSH;
      break;

    case LZMA_FULL_FLUSH:
      strm->internal->sequence = ISEQ_FULL_FLUSH;
      break;

    case LZMA_FINISH:
      strm->internal->sequence = ISEQ_FINISH;
      break;

    case LZMA_FULL_BARRIER:
      strm->internal->sequence = ISEQ_FULL_BARRIER;
      break;
    }

    break;

  case ISEQ_SYNC_FLUSH:
    // The same action must be used until we return
    // LZMA_STREAM_END, and the amount of input must not change.
    if (action != LZMA_SYNC_FLUSH
        || strm->internal->avail_in != strm->avail_in)
      return LZMA_PROG_ERROR;

    break;

  case ISEQ_FULL_FLUSH:
    if (action != LZMA_FULL_FLUSH
        || strm->internal->avail_in != strm->avail_in)
      return LZMA_PROG_ERROR;

    break;

  case ISEQ_FINISH:
    if (action != LZMA_FINISH
        || strm->internal->avail_in != strm->avail_in)
      return LZMA_PROG_ERROR;

    break;

  case ISEQ_FULL_BARRIER:
    if (action != LZMA_FULL_BARRIER
        || strm->internal->avail_in != strm->avail_in)
      return LZMA_PROG_ERROR;

    break;

  case ISEQ_END:
    return LZMA_STREAM_END;

  case ISEQ_ERROR:
  default:
    return LZMA_PROG_ERROR;
  }

  size_t in_pos = 0;
  size_t out_pos = 0;
  lzma_ret ret = strm->internal->next.code(
      strm->internal->next.coder, strm->allocator,
      strm->next_in, &in_pos, strm->avail_in,
      strm->next_out, &out_pos, strm->avail_out, action);

  // Updating next_in and next_out has to be skipped when they are NULL
  // to avoid null pointer + 0 (undefined behavior). Do this by checking
  // in_pos > 0 and out_pos > 0 because this way NULL + non-zero (a bug)
  // will get caught one way or other.
  if (in_pos > 0) {
    strm->next_in += in_pos;
    strm->avail_in -= in_pos;
    strm->total_in += in_pos;
  }

  if (out_pos > 0) {
    strm->next_out += out_pos;
    strm->avail_out -= out_pos;
    strm->total_out += out_pos;
  }

  strm->internal->avail_in = strm->avail_in;

  switch (ret) {
  case LZMA_OK:
    // Don't return LZMA_BUF_ERROR when it happens the first time.
    // This is to avoid returning LZMA_BUF_ERROR when avail_out
    // was zero but still there was no more data left to written
    // to next_out.
    if (out_pos == 0 && in_pos == 0) {
      if (strm->internal->allow_buf_error)
        ret = LZMA_BUF_ERROR;
      else
        strm->internal->allow_buf_error = true;
    } else {
      strm->internal->allow_buf_error = false;
    }
    break;

  case LZMA_TIMED_OUT:
    strm->internal->allow_buf_error = false;
    ret = LZMA_OK;
    break;

  case LZMA_SEEK_NEEDED:
    strm->internal->allow_buf_error = false;

    // If LZMA_FINISH was used, reset it back to the
    // LZMA_RUN-based state so that new input can be supplied
    // by the application.
    if (strm->internal->sequence == ISEQ_FINISH)
      strm->internal->sequence = ISEQ_RUN;

    break;

  case LZMA_STREAM_END:
    if (strm->internal->sequence == ISEQ_SYNC_FLUSH
        || strm->internal->sequence == ISEQ_FULL_FLUSH
        || strm->internal->sequence
          == ISEQ_FULL_BARRIER)
      strm->internal->sequence = ISEQ_RUN;
    else
      strm->internal->sequence = ISEQ_END;

    FALLTHROUGH;

  case LZMA_NO_CHECK:
  case LZMA_UNSUPPORTED_CHECK:
  case LZMA_GET_CHECK:
  case LZMA_MEMLIMIT_ERROR:
    // Something else than LZMA_OK, but not a fatal error,
    // that is, coding may be continued (except if ISEQ_END).
    strm->internal->allow_buf_error = false;
    break;

  default:
    // All the other errors are fatal; coding cannot be continued.
    assert(ret != LZMA_BUF_ERROR);
    strm->internal->sequence = ISEQ_ERROR;
    break;
  }

  return ret;
}


extern LZMA_API(void)
lzma_end(lzma_stream *strm)
{
  if (strm != NULL && strm->internal != NULL) {
    lzma_next_end(&strm->internal->next, strm->allocator);
    lzma_free(strm->internal, strm->allocator);
    strm->internal = NULL;
  }

  return;
}


#ifdef HAVE_SYMBOL_VERSIONS_LINUX
// This is for compatibility with binaries linked against liblzma that
// has been patched with xz-5.2.2-compat-libs.patch from RHEL/CentOS 7.
LZMA_SYMVER_API("lzma_get_progress@XZ_5.2.2",
  void, lzma_get_progress_522)(lzma_stream *strm,
    uint64_t *progress_in, uint64_t *progress_out) lzma_nothrow
    __attribute__((__alias__("lzma_get_progress_52")));

LZMA_SYMVER_API("lzma_get_progress@@XZ_5.2",
  void, lzma_get_progress_52)(lzma_stream *strm,
    uint64_t *progress_in, uint64_t *progress_out) lzma_nothrow;

#define lzma_get_progress lzma_get_progress_52
#endif
extern LZMA_API(void)
lzma_get_progress(lzma_stream *strm,
    uint64_t *progress_in, uint64_t *progress_out)
{
  if (strm->internal->next.get_progress != NULL) {
    strm->internal->next.get_progress(strm->internal->next.coder,
        progress_in, progress_out);
  } else {
    *progress_in = strm->total_in;
    *progress_out = strm->total_out;
  }

  return;
}


extern LZMA_API(lzma_check)
lzma_get_check(const lzma_stream *strm)
{
  // Return LZMA_CHECK_NONE if we cannot know the check type.
  // It's a bug in the application if this happens.
  if (strm->internal->next.get_check == NULL)
    return LZMA_CHECK_NONE;

  return strm->internal->next.get_check(strm->internal->next.coder);
}


extern LZMA_API(uint64_t)
lzma_memusage(const lzma_stream *strm)
{
  uint64_t memusage;
  uint64_t old_memlimit;

  if (strm == NULL || strm->internal == NULL
      || strm->internal->next.memconfig == NULL
      || strm->internal->next.memconfig(
        strm->internal->next.coder,
        &memusage, &old_memlimit, 0) != LZMA_OK)
    return 0;

  return memusage;
}


extern LZMA_API(uint64_t)
lzma_memlimit_get(const lzma_stream *strm)
{
  uint64_t old_memlimit;
  uint64_t memusage;

  if (strm == NULL || strm->internal == NULL
      || strm->internal->next.memconfig == NULL
      || strm->internal->next.memconfig(
        strm->internal->next.coder,
        &memusage, &old_memlimit, 0) != LZMA_OK)
    return 0;

  return old_memlimit;
}


extern LZMA_API(lzma_ret)
lzma_memlimit_set(lzma_stream *strm, uint64_t new_memlimit)
{
  // Dummy variables to simplify memconfig functions
  uint64_t old_memlimit;
  uint64_t memusage;

  if (strm == NULL || strm->internal == NULL
      || strm->internal->next.memconfig == NULL)
    return LZMA_PROG_ERROR;

  // Zero is a special value that cannot be used as an actual limit.
  // If 0 was specified, use 1 instead.
  if (new_memlimit == 0)
    new_memlimit = 1;

  return strm->internal->next.memconfig(strm->internal->next.coder,
      &memusage, &old_memlimit, new_memlimit);
}

Coverage Report

Created: 2026-05-24 07:45

Line	Count	Source
1		// SPDX-License-Identifier: 0BSD
2
3		///////////////////////////////////////////////////////////////////////////////
4		//
5		/// \file common.c
6		/// \brief Common functions needed in many places in liblzma
7		//
8		// Author: Lasse Collin
9		//
10		///////////////////////////////////////////////////////////////////////////////
11
12		#include "common.h"
13
14
15		/////////////
16		// Version //
17		/////////////
18
19		extern LZMA_API(uint32_t)
20		lzma_version_number(void)
21	0	{
22	0	return LZMA_VERSION;
23	0	}
24
25
26		extern LZMA_API(const char *)
27		lzma_version_string(void)
28	0	{
29	0	return LZMA_VERSION_STRING;
30	0	}
31
32
33		///////////////////////
34		// Memory allocation //
35		///////////////////////
36
37		lzma_attr_alloc_size(1)
38		extern void *
39		lzma_alloc(size_t size, const lzma_allocator *allocator)
40	165	{
41		// Some malloc() variants return NULL if called with size == 0.
42	165	if (size == 0)
43	0	size = 1;
44
45	165	void *ptr;
46
47	165	if (allocator != NULL && allocator->alloc != NULL)
48	0	ptr = allocator->alloc(allocator->opaque, 1, size);
49	165	else
50	165	ptr = malloc(size);
51
52	165	return ptr;
53	165	}
54
55
56		lzma_attr_alloc_size(1)
57		extern void *
58		lzma_alloc_zero(size_t size, const lzma_allocator *allocator)
59	0	{
60		// Some calloc() variants return NULL if called with size == 0.
61	0	if (size == 0)
62	0	size = 1;
63
64	0	void *ptr;
65
66	0	if (allocator != NULL && allocator->alloc != NULL) {
67	0	ptr = allocator->alloc(allocator->opaque, 1, size);
68	0	if (ptr != NULL)
69	0	memzero(ptr, size);
70	0	} else {
71	0	ptr = calloc(1, size);
72	0	}
73
74	0	return ptr;
75	0	}
76
77
78		extern void
79		lzma_free(void ptr, const lzma_allocator allocator)
80	192	{
81	192	if (allocator != NULL && allocator->free != NULL)
82	0	allocator->free(allocator->opaque, ptr);
83	192	else
84	192	free(ptr);
85
86	192	return;
87	192	}
88
89
90		//////////
91		// Misc //
92		//////////
93
94		extern size_t
95		lzma_bufcpy(const uint8_t restrict in, size_t restrict in_pos,
96		size_t in_size, uint8_t *restrict out,
97		size_t *restrict out_pos, size_t out_size)
98	92	{
99	92	assert(in != NULL \|\| *in_pos == in_size);
100	92	assert(out != NULL \|\| *out_pos == out_size);
101
102	92	assert(*in_pos <= in_size);
103	92	assert(*out_pos <= out_size);
104
105	92	const size_t in_avail = in_size - *in_pos;
106	92	const size_t out_avail = out_size - *out_pos;
107	92	const size_t copy_size = my_min(in_avail, out_avail);
108
109		// Call memcpy() only if there is something to copy. If there is
110		// nothing to copy, in or out might be NULL and then the memcpy()
111		// call would trigger undefined behavior.
112	92	if (copy_size > 0)
113	86	memcpy(out + out_pos, in + in_pos, copy_size);
114
115	92	*in_pos += copy_size;
116	92	*out_pos += copy_size;
117
118	92	return copy_size;
119	92	}
120
121
122		extern lzma_ret
123		lzma_next_filter_init(lzma_next_coder next, const lzma_allocator allocator,
124		const lzma_filter_info *filters)
125	0	{
126	0	lzma_next_coder_init(filters[0].init, next, allocator);
127	0	next->id = filters[0].id;
128	0	return filters[0].init == NULL
129	0	? LZMA_OK : filters[0].init(next, allocator, filters);
130	0	}
131
132
133		extern lzma_ret
134		lzma_next_filter_update(lzma_next_coder next, const lzma_allocator allocator,
135		const lzma_filter *reversed_filters)
136	0	{
137		// Check that the application isn't trying to change the Filter ID.
138		// End of filters is indicated with LZMA_VLI_UNKNOWN in both
139		// reversed_filters[0].id and next->id.
140	0	if (reversed_filters[0].id != next->id)
141	0	return LZMA_PROG_ERROR;
142
143	0	if (reversed_filters[0].id == LZMA_VLI_UNKNOWN)
144	0	return LZMA_OK;
145
146	0	assert(next->update != NULL);
147	0	return next->update(next->coder, allocator, NULL, reversed_filters);
148	0	}
149
150
151		extern void
152		lzma_next_end(lzma_next_coder next, const lzma_allocator allocator)
153	156	{
154	156	if (next->init != (uintptr_t)(NULL)) {
155		// To avoid tiny end functions that simply call
156		// lzma_free(coder, allocator), we allow leaving next->end
157		// NULL and call lzma_free() here.
158	52	if (next->end != NULL)
159	52	next->end(next->coder, allocator);
160	0	else
161	0	lzma_free(next->coder, allocator);
162
163		// Reset the variables so the we don't accidentally think
164		// that it is an already initialized coder.
165	52	*next = LZMA_NEXT_CODER_INIT;
166	52	}
167
168	156	return;
169	156	}
170
171
172		//////////////////////////////////////
173		// External to internal API wrapper //
174		//////////////////////////////////////
175
176		extern lzma_ret
177		lzma_strm_init(lzma_stream *strm)
178	52	{
179	52	if (strm == NULL)
180	0	return LZMA_PROG_ERROR;
181
182	52	if (strm->internal == NULL) {
183	52	strm->internal = lzma_alloc(sizeof(lzma_internal),
184	52	strm->allocator);
185	52	if (strm->internal == NULL)
186	0	return LZMA_MEM_ERROR;
187
188	52	strm->internal->next = LZMA_NEXT_CODER_INIT;
189	52	}
190
191	52	memzero(strm->internal->supported_actions,
192	52	sizeof(strm->internal->supported_actions));
193	52	strm->internal->sequence = ISEQ_RUN;
194	52	strm->internal->allow_buf_error = false;
195
196	52	strm->total_in = 0;
197	52	strm->total_out = 0;
198
199	52	return LZMA_OK;
200	52	}
201
202
203		extern LZMA_API(lzma_ret)
204		lzma_code(lzma_stream *strm, lzma_action action)
205	62	{
206		// Sanity checks
207	62	if ((strm->next_in == NULL && strm->avail_in != 0)
208	62	\|\| (strm->next_out == NULL && strm->avail_out != 0)
209	62	\|\| strm->internal == NULL
210	62	\|\| strm->internal->next.code == NULL
211	62	\|\| (unsigned int)(action) > LZMA_ACTION_MAX
212	62	\|\| !strm->internal->supported_actions[action])
213	0	return LZMA_PROG_ERROR;
214
215		// Check if unsupported members have been set to non-zero or non-NULL,
216		// which would indicate that some new feature is wanted.
217	62	if (strm->reserved_ptr1 != NULL
218	62	\|\| strm->reserved_ptr2 != NULL
219	62	\|\| strm->reserved_ptr3 != NULL
220	62	\|\| strm->reserved_ptr4 != NULL
221	62	\|\| strm->reserved_int2 != 0
222	62	\|\| strm->reserved_int3 != 0
223	62	\|\| strm->reserved_int4 != 0
224	62	\|\| strm->reserved_enum1 != LZMA_RESERVED_ENUM
225	62	\|\| strm->reserved_enum2 != LZMA_RESERVED_ENUM)
226	0	return LZMA_OPTIONS_ERROR;
227
228	62	switch (strm->internal->sequence) {
229	62	case ISEQ_RUN:
230	62	switch (action) {
231	62	case LZMA_RUN:
232	62	break;
233
234	0	case LZMA_SYNC_FLUSH:
235	0	strm->internal->sequence = ISEQ_SYNC_FLUSH;
236	0	break;
237
238	0	case LZMA_FULL_FLUSH:
239	0	strm->internal->sequence = ISEQ_FULL_FLUSH;
240	0	break;
241
242	0	case LZMA_FINISH:
243	0	strm->internal->sequence = ISEQ_FINISH;
244	0	break;
245
246	0	case LZMA_FULL_BARRIER:
247	0	strm->internal->sequence = ISEQ_FULL_BARRIER;
248	0	break;
249	62	}
250
251	62	break;
252
253	62	case ISEQ_SYNC_FLUSH:
254		// The same action must be used until we return
255		// LZMA_STREAM_END, and the amount of input must not change.
256	0	if (action != LZMA_SYNC_FLUSH
257	0	\|\| strm->internal->avail_in != strm->avail_in)
258	0	return LZMA_PROG_ERROR;
259
260	0	break;
261
262	0	case ISEQ_FULL_FLUSH:
263	0	if (action != LZMA_FULL_FLUSH
264	0	\|\| strm->internal->avail_in != strm->avail_in)
265	0	return LZMA_PROG_ERROR;
266
267	0	break;
268
269	0	case ISEQ_FINISH:
270	0	if (action != LZMA_FINISH
271	0	\|\| strm->internal->avail_in != strm->avail_in)
272	0	return LZMA_PROG_ERROR;
273
274	0	break;
275
276	0	case ISEQ_FULL_BARRIER:
277	0	if (action != LZMA_FULL_BARRIER
278	0	\|\| strm->internal->avail_in != strm->avail_in)
279	0	return LZMA_PROG_ERROR;
280
281	0	break;
282
283	0	case ISEQ_END:
284	0	return LZMA_STREAM_END;
285
286	0	case ISEQ_ERROR:
287	0	default:
288	0	return LZMA_PROG_ERROR;
289	62	}
290
291	62	size_t in_pos = 0;
292	62	size_t out_pos = 0;
293	62	lzma_ret ret = strm->internal->next.code(
294	62	strm->internal->next.coder, strm->allocator,
295	62	strm->next_in, &in_pos, strm->avail_in,
296	62	strm->next_out, &out_pos, strm->avail_out, action);
297
298		// Updating next_in and next_out has to be skipped when they are NULL
299		// to avoid null pointer + 0 (undefined behavior). Do this by checking
300		// in_pos > 0 and out_pos > 0 because this way NULL + non-zero (a bug)
301		// will get caught one way or other.
302	62	if (in_pos > 0) {
303	52	strm->next_in += in_pos;
304	52	strm->avail_in -= in_pos;
305	52	strm->total_in += in_pos;
306	52	}
307
308	62	if (out_pos > 0) {
309	0	strm->next_out += out_pos;
310	0	strm->avail_out -= out_pos;
311	0	strm->total_out += out_pos;
312	0	}
313
314	62	strm->internal->avail_in = strm->avail_in;
315
316	62	switch (ret) {
317	15	case LZMA_OK:
318		// Don't return LZMA_BUF_ERROR when it happens the first time.
319		// This is to avoid returning LZMA_BUF_ERROR when avail_out
320		// was zero but still there was no more data left to written
321		// to next_out.
322	15	if (out_pos == 0 && in_pos == 0) {
323	10	if (strm->internal->allow_buf_error)
324	5	ret = LZMA_BUF_ERROR;
325	5	else
326	5	strm->internal->allow_buf_error = true;
327	10	} else {
328	5	strm->internal->allow_buf_error = false;
329	5	}
330	15	break;
331
332	0	case LZMA_TIMED_OUT:
333	0	strm->internal->allow_buf_error = false;
334	0	ret = LZMA_OK;
335	0	break;
336
337	0	case LZMA_SEEK_NEEDED:
338	0	strm->internal->allow_buf_error = false;
339
340		// If LZMA_FINISH was used, reset it back to the
341		// LZMA_RUN-based state so that new input can be supplied
342		// by the application.
343	0	if (strm->internal->sequence == ISEQ_FINISH)
344	0	strm->internal->sequence = ISEQ_RUN;
345
346	0	break;
347
348	0	case LZMA_STREAM_END:
349	0	if (strm->internal->sequence == ISEQ_SYNC_FLUSH
350	0	\|\| strm->internal->sequence == ISEQ_FULL_FLUSH
351	0	\|\| strm->internal->sequence
352	0	== ISEQ_FULL_BARRIER)
353	0	strm->internal->sequence = ISEQ_RUN;
354	0	else
355	0	strm->internal->sequence = ISEQ_END;
356
357	0	FALLTHROUGH;
358
359	0	case LZMA_NO_CHECK:
360	0	case LZMA_UNSUPPORTED_CHECK:
361	0	case LZMA_GET_CHECK:
362	0	case LZMA_MEMLIMIT_ERROR:
363		// Something else than LZMA_OK, but not a fatal error,
364		// that is, coding may be continued (except if ISEQ_END).
365	0	strm->internal->allow_buf_error = false;
366	0	break;
367
368	47	default:
369		// All the other errors are fatal; coding cannot be continued.
370	47	assert(ret != LZMA_BUF_ERROR);
371	47	strm->internal->sequence = ISEQ_ERROR;
372	47	break;
373	62	}
374
375	62	return ret;
376	62	}
377
378
379		extern LZMA_API(void)
380		lzma_end(lzma_stream *strm)
381	55	{
382	55	if (strm != NULL && strm->internal != NULL) {
383	52	lzma_next_end(&strm->internal->next, strm->allocator);
384	52	lzma_free(strm->internal, strm->allocator);
385	52	strm->internal = NULL;
386	52	}
387
388	55	return;
389	55	}
390
391
392		#ifdef HAVE_SYMBOL_VERSIONS_LINUX
393		// This is for compatibility with binaries linked against liblzma that
394		// has been patched with xz-5.2.2-compat-libs.patch from RHEL/CentOS 7.
395		LZMA_SYMVER_API("lzma_get_progress@XZ_5.2.2",
396		void, lzma_get_progress_522)(lzma_stream *strm,
397		uint64_t progress_in, uint64_t progress_out) lzma_nothrow
398		__attribute__((__alias__("lzma_get_progress_52")));
399
400		LZMA_SYMVER_API("lzma_get_progress@@XZ_5.2",
401		void, lzma_get_progress_52)(lzma_stream *strm,
402		uint64_t progress_in, uint64_t progress_out) lzma_nothrow;
403
404		#define lzma_get_progress lzma_get_progress_52
405		#endif
406		extern LZMA_API(void)
407		lzma_get_progress(lzma_stream *strm,
408		uint64_t progress_in, uint64_t progress_out)
409	0	{
410	0	if (strm->internal->next.get_progress != NULL) {
411	0	strm->internal->next.get_progress(strm->internal->next.coder,
412	0	progress_in, progress_out);
413	0	} else {
414	0	*progress_in = strm->total_in;
415	0	*progress_out = strm->total_out;
416	0	}
417
418	0	return;
419	0	}
420
421
422		extern LZMA_API(lzma_check)
423		lzma_get_check(const lzma_stream *strm)
424	0	{
425		// Return LZMA_CHECK_NONE if we cannot know the check type.
426		// It's a bug in the application if this happens.
427	0	if (strm->internal->next.get_check == NULL)
428	0	return LZMA_CHECK_NONE;
429
430	0	return strm->internal->next.get_check(strm->internal->next.coder);
431	0	}
432
433
434		extern LZMA_API(uint64_t)
435		lzma_memusage(const lzma_stream *strm)
436	0	{
437	0	uint64_t memusage;
438	0	uint64_t old_memlimit;
439
440	0	if (strm == NULL \|\| strm->internal == NULL
441	0	\|\| strm->internal->next.memconfig == NULL
442	0	\|\| strm->internal->next.memconfig(
443	0	strm->internal->next.coder,
444	0	&memusage, &old_memlimit, 0) != LZMA_OK)
445	0	return 0;
446
447	0	return memusage;
448	0	}
449
450
451		extern LZMA_API(uint64_t)
452		lzma_memlimit_get(const lzma_stream *strm)
453	0	{
454	0	uint64_t old_memlimit;
455	0	uint64_t memusage;
456
457	0	if (strm == NULL \|\| strm->internal == NULL
458	0	\|\| strm->internal->next.memconfig == NULL
459	0	\|\| strm->internal->next.memconfig(
460	0	strm->internal->next.coder,
461	0	&memusage, &old_memlimit, 0) != LZMA_OK)
462	0	return 0;
463
464	0	return old_memlimit;
465	0	}
466
467
468		extern LZMA_API(lzma_ret)
469		lzma_memlimit_set(lzma_stream *strm, uint64_t new_memlimit)
470	0	{
471		// Dummy variables to simplify memconfig functions
472	0	uint64_t old_memlimit;
473	0	uint64_t memusage;
474
475	0	if (strm == NULL \|\| strm->internal == NULL
476	0	\|\| strm->internal->next.memconfig == NULL)
477	0	return LZMA_PROG_ERROR;
478
479		// Zero is a special value that cannot be used as an actual limit.
480		// If 0 was specified, use 1 instead.
481	0	if (new_memlimit == 0)
482	0	new_memlimit = 1;
483
484	0	return strm->internal->next.memconfig(strm->internal->next.coder,
485	0	&memusage, &old_memlimit, new_memlimit);
486	0	}