diff options
Diffstat (limited to 'src/Common/libzip/zip_source_buffer.c')
| -rw-r--r-- | src/Common/libzip/zip_source_buffer.c | 434 |
1 files changed, 219 insertions, 215 deletions
diff --git a/src/Common/libzip/zip_source_buffer.c b/src/Common/libzip/zip_source_buffer.c index 519d2c30..04cd4f0a 100644 --- a/src/Common/libzip/zip_source_buffer.c +++ b/src/Common/libzip/zip_source_buffer.c @@ -1,9 +1,9 @@ /* zip_source_buffer.c -- create zip data source from buffer - Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner + Copyright (C) 1999-2022 Dieter Baron and Thomas Klausner This file is part of libzip, a library to manipulate ZIP archives. - The authors can be contacted at <libzip@nih.at> + The authors can be contacted at <info@libzip.org> Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions @@ -87,7 +87,7 @@ zip_source_t *zip_source_buffer_fragment_with_attributes_create(const zip_buffer ZIP_EXTERN zip_source_t * zip_source_buffer(zip_t *za, const void *data, zip_uint64_t len, int freep) { if (za == NULL) - return NULL; + return NULL; return zip_source_buffer_with_attributes_create(data, len, freep, NULL, &za->error); } @@ -104,12 +104,12 @@ zip_source_buffer_with_attributes_create(const void *data, zip_uint64_t len, int zip_buffer_fragment_t fragment; if (data == NULL) { - if (len > 0) { - zip_error_set(error, ZIP_ER_INVAL, 0); - return NULL; - } + if (len > 0) { + zip_error_set(error, ZIP_ER_INVAL, 0); + return NULL; + } - return zip_source_buffer_fragment_with_attributes_create(NULL, 0, freep, attributes, error); + return zip_source_buffer_fragment_with_attributes_create(NULL, 0, freep, attributes, error); } fragment.data = (zip_uint8_t *)data; @@ -122,7 +122,7 @@ zip_source_buffer_with_attributes_create(const void *data, zip_uint64_t len, int ZIP_EXTERN zip_source_t * zip_source_buffer_fragment(zip_t *za, const zip_buffer_fragment_t *fragments, zip_uint64_t nfragments, int freep) { if (za == NULL) { - return NULL; + return NULL; } return zip_source_buffer_fragment_with_attributes_create(fragments, nfragments, freep, NULL, &za->error); @@ -141,35 +141,35 @@ zip_source_buffer_fragment_with_attributes_create(const zip_buffer_fragment_t *f buffer_t *buffer; if (fragments == NULL && nfragments > 0) { - zip_error_set(error, ZIP_ER_INVAL, 0); - return NULL; + zip_error_set(error, ZIP_ER_INVAL, 0); + return NULL; } if ((buffer = buffer_new(fragments, nfragments, freep, error)) == NULL) { - return NULL; + return NULL; } if ((ctx = (struct read_data *)malloc(sizeof(*ctx))) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - buffer_free(buffer); - return NULL; + zip_error_set(error, ZIP_ER_MEMORY, 0); + buffer_free(buffer); + return NULL; } ctx->in = buffer; ctx->out = NULL; ctx->mtime = time(NULL); if (attributes) { - memcpy(&ctx->attributes, attributes, sizeof(ctx->attributes)); + memcpy(&ctx->attributes, attributes, sizeof(ctx->attributes)); } else { - zip_file_attributes_init(&ctx->attributes); + zip_file_attributes_init(&ctx->attributes); } zip_error_init(&ctx->error); if ((zs = zip_source_function_create(read_data, ctx, error)) == NULL) { - buffer_free(ctx->in); - free(ctx); - return NULL; + buffer_free(ctx->in); + free(ctx); + return NULL; } return zs; @@ -187,133 +187,133 @@ read_data(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd) { switch (cmd) { case ZIP_SOURCE_BEGIN_WRITE: - if ((ctx->out = buffer_new(NULL, 0, 0, &ctx->error)) == NULL) { - return -1; - } - ctx->out->offset = 0; - ctx->out->current_fragment = 0; - return 0; + if ((ctx->out = buffer_new(NULL, 0, 0, &ctx->error)) == NULL) { + return -1; + } + ctx->out->offset = 0; + ctx->out->current_fragment = 0; + return 0; case ZIP_SOURCE_BEGIN_WRITE_CLONING: - if ((ctx->out = buffer_clone(ctx->in, len, &ctx->error)) == NULL) { - return -1; - } - ctx->out->offset = len; - ctx->out->current_fragment = ctx->out->nfragments; - return 0; + if ((ctx->out = buffer_clone(ctx->in, len, &ctx->error)) == NULL) { + return -1; + } + ctx->out->offset = len; + ctx->out->current_fragment = ctx->out->nfragments; + return 0; case ZIP_SOURCE_CLOSE: - return 0; + return 0; case ZIP_SOURCE_COMMIT_WRITE: - buffer_free(ctx->in); - ctx->in = ctx->out; - ctx->out = NULL; - return 0; + buffer_free(ctx->in); + ctx->in = ctx->out; + ctx->out = NULL; + return 0; case ZIP_SOURCE_ERROR: - return zip_error_to_data(&ctx->error, data, len); + return zip_error_to_data(&ctx->error, data, len); case ZIP_SOURCE_FREE: - buffer_free(ctx->in); - buffer_free(ctx->out); - free(ctx); - return 0; + buffer_free(ctx->in); + buffer_free(ctx->out); + free(ctx); + return 0; case ZIP_SOURCE_GET_FILE_ATTRIBUTES: { - if (len < sizeof(ctx->attributes)) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } + if (len < sizeof(ctx->attributes)) { + zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); + return -1; + } - memcpy(data, &ctx->attributes, sizeof(ctx->attributes)); + memcpy(data, &ctx->attributes, sizeof(ctx->attributes)); - return sizeof(ctx->attributes); + return sizeof(ctx->attributes); } case ZIP_SOURCE_OPEN: - ctx->in->offset = 0; - ctx->in->current_fragment = 0; - return 0; + ctx->in->offset = 0; + ctx->in->current_fragment = 0; + return 0; case ZIP_SOURCE_READ: - if (len > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } - return buffer_read(ctx->in, data, len); + if (len > ZIP_INT64_MAX) { + zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); + return -1; + } + return buffer_read(ctx->in, data, len); case ZIP_SOURCE_REMOVE: { - buffer_t *empty = buffer_new(NULL, 0, 0, &ctx->error); - if (empty == NULL) { - return -1; - } + buffer_t *empty = buffer_new(NULL, 0, 0, &ctx->error); + if (empty == NULL) { + return -1; + } - buffer_free(ctx->in); - ctx->in = empty; - return 0; + buffer_free(ctx->in); + ctx->in = empty; + return 0; } case ZIP_SOURCE_ROLLBACK_WRITE: - buffer_free(ctx->out); - ctx->out = NULL; - return 0; + buffer_free(ctx->out); + ctx->out = NULL; + return 0; case ZIP_SOURCE_SEEK: - return buffer_seek(ctx->in, data, len, &ctx->error); + return buffer_seek(ctx->in, data, len, &ctx->error); case ZIP_SOURCE_SEEK_WRITE: - return buffer_seek(ctx->out, data, len, &ctx->error); + return buffer_seek(ctx->out, data, len, &ctx->error); case ZIP_SOURCE_STAT: { - zip_stat_t *st; + zip_stat_t *st; - if (len < sizeof(*st)) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } + if (len < sizeof(*st)) { + zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); + return -1; + } - st = (zip_stat_t *)data; + st = (zip_stat_t *)data; - zip_stat_init(st); - st->mtime = ctx->mtime; - st->size = ctx->in->size; - st->comp_size = st->size; - st->comp_method = ZIP_CM_STORE; - st->encryption_method = ZIP_EM_NONE; - st->valid = ZIP_STAT_MTIME | ZIP_STAT_SIZE | ZIP_STAT_COMP_SIZE | ZIP_STAT_COMP_METHOD | ZIP_STAT_ENCRYPTION_METHOD; + zip_stat_init(st); + st->mtime = ctx->mtime; + st->size = ctx->in->size; + st->comp_size = st->size; + st->comp_method = ZIP_CM_STORE; + st->encryption_method = ZIP_EM_NONE; + st->valid = ZIP_STAT_MTIME | ZIP_STAT_SIZE | ZIP_STAT_COMP_SIZE | ZIP_STAT_COMP_METHOD | ZIP_STAT_ENCRYPTION_METHOD; - return sizeof(*st); + return sizeof(*st); } case ZIP_SOURCE_SUPPORTS: - return zip_source_make_command_bitmap(ZIP_SOURCE_GET_FILE_ATTRIBUTES, ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, ZIP_SOURCE_SEEK, ZIP_SOURCE_TELL, ZIP_SOURCE_BEGIN_WRITE, ZIP_SOURCE_BEGIN_WRITE_CLONING, ZIP_SOURCE_COMMIT_WRITE, ZIP_SOURCE_REMOVE, ZIP_SOURCE_ROLLBACK_WRITE, ZIP_SOURCE_SEEK_WRITE, ZIP_SOURCE_TELL_WRITE, ZIP_SOURCE_WRITE, -1); + return zip_source_make_command_bitmap(ZIP_SOURCE_GET_FILE_ATTRIBUTES, ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, ZIP_SOURCE_SEEK, ZIP_SOURCE_TELL, ZIP_SOURCE_BEGIN_WRITE, ZIP_SOURCE_BEGIN_WRITE_CLONING, ZIP_SOURCE_COMMIT_WRITE, ZIP_SOURCE_REMOVE, ZIP_SOURCE_ROLLBACK_WRITE, ZIP_SOURCE_SEEK_WRITE, ZIP_SOURCE_TELL_WRITE, ZIP_SOURCE_WRITE, -1); case ZIP_SOURCE_TELL: - if (ctx->in->offset > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_TELL, EOVERFLOW); - return -1; - } - return (zip_int64_t)ctx->in->offset; + if (ctx->in->offset > ZIP_INT64_MAX) { + zip_error_set(&ctx->error, ZIP_ER_TELL, EOVERFLOW); + return -1; + } + return (zip_int64_t)ctx->in->offset; case ZIP_SOURCE_TELL_WRITE: - if (ctx->out->offset > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_TELL, EOVERFLOW); - return -1; - } - return (zip_int64_t)ctx->out->offset; + if (ctx->out->offset > ZIP_INT64_MAX) { + zip_error_set(&ctx->error, ZIP_ER_TELL, EOVERFLOW); + return -1; + } + return (zip_int64_t)ctx->out->offset; case ZIP_SOURCE_WRITE: - if (len > ZIP_INT64_MAX) { - zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); - return -1; - } - return buffer_write(ctx->out, data, len, &ctx->error); + if (len > ZIP_INT64_MAX) { + zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); + return -1; + } + return buffer_write(ctx->out, data, len, &ctx->error); default: - zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0); - return -1; + zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0); + return -1; } } @@ -324,34 +324,34 @@ buffer_clone(buffer_t *buffer, zip_uint64_t offset, zip_error_t *error) { buffer_t *clone; if (offset == 0) { - return buffer_new(NULL, 0, 1, error); + return buffer_new(NULL, 0, 1, error); } if (offset > buffer->size) { - zip_error_set(error, ZIP_ER_INVAL, 0); - return NULL; + zip_error_set(error, ZIP_ER_INVAL, 0); + return NULL; } if (buffer->shared_buffer != NULL) { - zip_error_set(error, ZIP_ER_INUSE, 0); - return NULL; + zip_error_set(error, ZIP_ER_INUSE, 0); + return NULL; } fragment = buffer_find_fragment(buffer, offset); fragment_offset = offset - buffer->fragment_offsets[fragment]; if (fragment_offset == 0) { - fragment--; - fragment_offset = buffer->fragments[fragment].length; + fragment--; + fragment_offset = buffer->fragments[fragment].length; } waste = buffer->fragments[fragment].length - fragment_offset; if (waste > offset) { - zip_error_set(error, ZIP_ER_OPNOTSUPP, 0); - return NULL; + zip_error_set(error, ZIP_ER_OPNOTSUPP, 0); + return NULL; } if ((clone = buffer_new(buffer->fragments, fragment + 1, 0, error)) == NULL) { - return NULL; + return NULL; } #ifndef __clang_analyzer__ @@ -361,13 +361,13 @@ buffer_clone(buffer_t *buffer, zip_uint64_t offset, zip_error_t *error) { clone->fragment_offsets[clone->nfragments] = offset; clone->size = offset; - clone->first_owned_fragment = ZIP_MIN(buffer->first_owned_fragment, clone->nfragments - 1); + clone->first_owned_fragment = ZIP_MIN(buffer->first_owned_fragment, clone->nfragments); buffer->shared_buffer = clone; clone->shared_buffer = buffer; buffer->shared_fragments = clone->nfragments; clone->shared_fragments = fragment + 1; - + return clone; } @@ -376,20 +376,24 @@ static zip_uint64_t buffer_find_fragment(const buffer_t *buffer, zip_uint64_t offset) { zip_uint64_t low, high, mid; + if (buffer->nfragments == 0) { + return 0; + } + low = 0; high = buffer->nfragments - 1; while (low < high) { - mid = (high - low) / 2 + low; - if (buffer->fragment_offsets[mid] > offset) { - high = mid - 1; - } - else if (mid == buffer->nfragments || buffer->fragment_offsets[mid + 1] > offset) { - return mid; - } - else { - low = mid + 1; - } + mid = (high - low) / 2 + low; + if (buffer->fragment_offsets[mid] > offset) { + high = mid - 1; + } + else if (mid == buffer->nfragments || buffer->fragment_offsets[mid + 1] > offset) { + return mid; + } + else { + low = mid + 1; + } } return low; @@ -401,18 +405,18 @@ buffer_free(buffer_t *buffer) { zip_uint64_t i; if (buffer == NULL) { - return; + return; } if (buffer->shared_buffer != NULL) { - buffer->shared_buffer->shared_buffer = NULL; - buffer->shared_buffer->shared_fragments = 0; + buffer->shared_buffer->shared_buffer = NULL; + buffer->shared_buffer->shared_fragments = 0; - buffer->first_owned_fragment = ZIP_MAX(buffer->first_owned_fragment, buffer->shared_fragments); + buffer->first_owned_fragment = ZIP_MAX(buffer->first_owned_fragment, buffer->shared_fragments); } for (i = buffer->first_owned_fragment; i < buffer->nfragments; i++) { - free(buffer->fragments[i].data); + free(buffer->fragments[i].data); } free(buffer->fragments); free(buffer->fragment_offsets); @@ -426,17 +430,17 @@ buffer_grow_fragments(buffer_t *buffer, zip_uint64_t capacity, zip_error_t *erro zip_uint64_t *offsets; if (capacity < buffer->fragments_capacity) { - return true; + return true; } if ((fragments = realloc(buffer->fragments, sizeof(buffer->fragments[0]) * capacity)) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return false; + zip_error_set(error, ZIP_ER_MEMORY, 0); + return false; } buffer->fragments = fragments; if ((offsets = realloc(buffer->fragment_offsets, sizeof(buffer->fragment_offsets[0]) * (capacity + 1))) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return false; + zip_error_set(error, ZIP_ER_MEMORY, 0); + return false; } buffer->fragment_offsets = offsets; buffer->fragments_capacity = capacity; @@ -450,7 +454,7 @@ buffer_new(const zip_buffer_fragment_t *fragments, zip_uint64_t nfragments, int buffer_t *buffer; if ((buffer = malloc(sizeof(*buffer))) == NULL) { - return NULL; + return NULL; } buffer->offset = 0; @@ -464,42 +468,42 @@ buffer_new(const zip_buffer_fragment_t *fragments, zip_uint64_t nfragments, int buffer->shared_fragments = 0; if (nfragments == 0) { - if ((buffer->fragment_offsets = malloc(sizeof(buffer->fragment_offsets[0]))) == NULL) { - free(buffer); - zip_error_set(error, ZIP_ER_MEMORY, 0); - return NULL; - } - buffer->fragment_offsets[0] = 0; + if ((buffer->fragment_offsets = malloc(sizeof(buffer->fragment_offsets[0]))) == NULL) { + free(buffer); + zip_error_set(error, ZIP_ER_MEMORY, 0); + return NULL; + } + buffer->fragment_offsets[0] = 0; } else { - zip_uint64_t i, j, offset; - - if (!buffer_grow_fragments(buffer, nfragments, NULL)) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - buffer_free(buffer); - return NULL; - } - - offset = 0; - for (i = 0, j = 0; i < nfragments; i++) { - if (fragments[i].length == 0) { - continue; - } - if (fragments[i].data == NULL) { - zip_error_set(error, ZIP_ER_INVAL, 0); - buffer_free(buffer); - return NULL; - } - buffer->fragments[j].data = fragments[i].data; - buffer->fragments[j].length = fragments[i].length; - buffer->fragment_offsets[i] = offset; - offset += fragments[i].length; - j++; - } - buffer->nfragments = j; - buffer->first_owned_fragment = free_data ? 0 : buffer->nfragments; - buffer->fragment_offsets[buffer->nfragments] = offset; - buffer->size = offset; + zip_uint64_t i, j, offset; + + if (!buffer_grow_fragments(buffer, nfragments, NULL)) { + zip_error_set(error, ZIP_ER_MEMORY, 0); + buffer_free(buffer); + return NULL; + } + + offset = 0; + for (i = 0, j = 0; i < nfragments; i++) { + if (fragments[i].length == 0) { + continue; + } + if (fragments[i].data == NULL) { + zip_error_set(error, ZIP_ER_INVAL, 0); + buffer_free(buffer); + return NULL; + } + buffer->fragments[j].data = fragments[i].data; + buffer->fragments[j].length = fragments[i].length; + buffer->fragment_offsets[i] = offset; + offset += fragments[i].length; + j++; + } + buffer->nfragments = j; + buffer->first_owned_fragment = free_data ? 0 : buffer->nfragments; + buffer->fragment_offsets[buffer->nfragments] = offset; + buffer->size = offset; } return buffer; @@ -512,25 +516,25 @@ buffer_read(buffer_t *buffer, zip_uint8_t *data, zip_uint64_t length) { length = ZIP_MIN(length, buffer->size - buffer->offset); if (length == 0) { - return 0; + return 0; } if (length > ZIP_INT64_MAX) { - return -1; + return -1; } i = buffer->current_fragment; fragment_offset = buffer->offset - buffer->fragment_offsets[i]; n = 0; while (n < length) { - zip_uint64_t left = ZIP_MIN(length - n, buffer->fragments[i].length - fragment_offset); + zip_uint64_t left = ZIP_MIN(length - n, buffer->fragments[i].length - fragment_offset); - memcpy(data + n, buffer->fragments[i].data + fragment_offset, left); + memcpy(data + n, buffer->fragments[i].data + fragment_offset, left); - if (left == buffer->fragments[i].length - fragment_offset) { - i++; - } - n += left; - fragment_offset = 0; + if (left == buffer->fragments[i].length - fragment_offset) { + i++; + } + n += left; + fragment_offset = 0; } buffer->offset += n; @@ -544,7 +548,7 @@ buffer_seek(buffer_t *buffer, void *data, zip_uint64_t len, zip_error_t *error) zip_int64_t new_offset = zip_source_seek_compute_offset(buffer->offset, buffer->size, data, len, error); if (new_offset < 0) { - return -1; + return -1; } buffer->offset = (zip_uint64_t)new_offset; @@ -558,62 +562,62 @@ buffer_write(buffer_t *buffer, const zip_uint8_t *data, zip_uint64_t length, zip zip_uint64_t n, i, fragment_offset, capacity; if (buffer->offset + length + WRITE_FRAGMENT_SIZE - 1 < length) { - zip_error_set(error, ZIP_ER_INVAL, 0); - return -1; + zip_error_set(error, ZIP_ER_INVAL, 0); + return -1; } /* grow buffer if needed */ capacity = buffer_capacity(buffer); if (buffer->offset + length > capacity) { - zip_uint64_t needed_fragments = buffer->nfragments + (length - (capacity - buffer->offset) + WRITE_FRAGMENT_SIZE - 1) / WRITE_FRAGMENT_SIZE; - - if (needed_fragments > buffer->fragments_capacity) { - zip_uint64_t new_capacity = buffer->fragments_capacity; - - if (new_capacity == 0) { - new_capacity = 16; - } - while (new_capacity < needed_fragments) { - new_capacity *= 2; - } - - if (!buffer_grow_fragments(buffer, new_capacity, error)) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return -1; - } - } - - while (buffer->nfragments < needed_fragments) { - if ((buffer->fragments[buffer->nfragments].data = malloc(WRITE_FRAGMENT_SIZE)) == NULL) { - zip_error_set(error, ZIP_ER_MEMORY, 0); - return -1; - } - buffer->fragments[buffer->nfragments].length = WRITE_FRAGMENT_SIZE; - buffer->nfragments++; - capacity += WRITE_FRAGMENT_SIZE; - buffer->fragment_offsets[buffer->nfragments] = capacity; - } + zip_uint64_t needed_fragments = buffer->nfragments + (length - (capacity - buffer->offset) + WRITE_FRAGMENT_SIZE - 1) / WRITE_FRAGMENT_SIZE; + + if (needed_fragments > buffer->fragments_capacity) { + zip_uint64_t new_capacity = buffer->fragments_capacity; + + if (new_capacity == 0) { + new_capacity = 16; + } + while (new_capacity < needed_fragments) { + new_capacity *= 2; + } + + if (!buffer_grow_fragments(buffer, new_capacity, error)) { + zip_error_set(error, ZIP_ER_MEMORY, 0); + return -1; + } + } + + while (buffer->nfragments < needed_fragments) { + if ((buffer->fragments[buffer->nfragments].data = malloc(WRITE_FRAGMENT_SIZE)) == NULL) { + zip_error_set(error, ZIP_ER_MEMORY, 0); + return -1; + } + buffer->fragments[buffer->nfragments].length = WRITE_FRAGMENT_SIZE; + buffer->nfragments++; + capacity += WRITE_FRAGMENT_SIZE; + buffer->fragment_offsets[buffer->nfragments] = capacity; + } } i = buffer->current_fragment; fragment_offset = buffer->offset - buffer->fragment_offsets[i]; n = 0; while (n < length) { - zip_uint64_t left = ZIP_MIN(length - n, buffer->fragments[i].length - fragment_offset); + zip_uint64_t left = ZIP_MIN(length - n, buffer->fragments[i].length - fragment_offset); - memcpy(buffer->fragments[i].data + fragment_offset, data + n, left); + memcpy(buffer->fragments[i].data + fragment_offset, data + n, left); - if (left == buffer->fragments[i].length - fragment_offset) { - i++; - } - n += left; - fragment_offset = 0; + if (left == buffer->fragments[i].length - fragment_offset) { + i++; + } + n += left; + fragment_offset = 0; } buffer->offset += n; buffer->current_fragment = i; if (buffer->offset > buffer->size) { - buffer->size = buffer->offset; + buffer->size = buffer->offset; } return (zip_int64_t)n; |