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author | Andres Mejia <amejia004@gmail.com> | 2012-09-22 18:43:23 -0400 |
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committer | Andres Mejia <amejia004@gmail.com> | 2012-12-07 18:39:52 -0500 |
commit | 82b5d8dfb3c358df513d2fb89aa6a5b90188b4c2 (patch) | |
tree | a1a4f6fae52efb8ec0db2b52c491947ffb8b447a /libarchive/archive_read.c | |
parent | 5fbef6a07470912e033f316eeb42ff3e54877f9d (diff) | |
download | libarchive-82b5d8dfb3c358df513d2fb89aa6a5b90188b4c2.tar.gz |
Implement functions to manually set the format and filters used.
Diffstat (limited to 'libarchive/archive_read.c')
-rw-r--r-- | libarchive/archive_read.c | 275 |
1 files changed, 260 insertions, 15 deletions
diff --git a/libarchive/archive_read.c b/libarchive/archive_read.c index 76631534..2a66d408 100644 --- a/libarchive/archive_read.c +++ b/libarchive/archive_read.c @@ -455,7 +455,7 @@ int archive_read_open1(struct archive *_a) { struct archive_read *a = (struct archive_read *)_a; - struct archive_read_filter *filter; + struct archive_read_filter *filter, *tmp; int slot, e; unsigned int i; @@ -499,25 +499,37 @@ archive_read_open1(struct archive *_a) filter->sswitch = client_switch_proxy; filter->name = "none"; filter->code = ARCHIVE_FILTER_NONE; - a->filter = filter; - client_switch_proxy(a->filter, 0); a->client.dataset[0].begin_position = 0; - - /* Build out the input pipeline. */ - e = choose_filters(a); - if (e < ARCHIVE_WARN) { - a->archive.state = ARCHIVE_STATE_FATAL; - return (ARCHIVE_FATAL); + if (!a->filter || !a->bypass_filter_bidding) + { + a->filter = filter; + /* Build out the input pipeline. */ + e = choose_filters(a); + if (e < ARCHIVE_WARN) { + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + } + else + { + /* Need to add "NONE" type filter at the end of the filter chain */ + tmp = a->filter; + while (tmp->upstream) + tmp = tmp->upstream; + tmp->upstream = filter; } - slot = choose_format(a); - if (slot < 0) { - close_filters(a); - a->archive.state = ARCHIVE_STATE_FATAL; - return (ARCHIVE_FATAL); + if (!a->format) + { + slot = choose_format(a); + if (slot < 0) { + close_filters(a); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + a->format = &(a->formats[slot]); } - a->format = &(a->formats[slot]); a->archive.state = ARCHIVE_STATE_HEADER; @@ -1622,3 +1634,236 @@ __archive_read_filter_seek(struct archive_read_filter *filter, int64_t offset, } return r; } + +int +archive_read_set_format(struct archive *_a, int code) +{ + int r1, r2, slots, i; + char str[10]; + struct archive_read *a = (struct archive_read *)_a; + + if ((r1 = archive_read_support_format_by_code(_a, code)) < (ARCHIVE_OK)) + return r1; + + r1 = r2 = (ARCHIVE_OK); + if (a->format) + r2 = (ARCHIVE_WARN); + switch (code & ARCHIVE_FORMAT_BASE_MASK) + { + case ARCHIVE_FORMAT_7ZIP: + strcpy(str, "7zip"); + break; + case ARCHIVE_FORMAT_AR: + strcpy(str, "ar"); + break; + case ARCHIVE_FORMAT_CAB: + strcpy(str, "cab"); + break; + case ARCHIVE_FORMAT_CPIO: + strcpy(str, "cpio"); + break; + case ARCHIVE_FORMAT_ISO9660: + strcpy(str, "iso9660"); + break; + case ARCHIVE_FORMAT_LHA: + strcpy(str, "lha"); + break; + case ARCHIVE_FORMAT_MTREE: + strcpy(str, "mtree"); + break; + case ARCHIVE_FORMAT_RAR: + strcpy(str, "rar"); + break; + case ARCHIVE_FORMAT_TAR: + strcpy(str, "tar"); + break; + case ARCHIVE_FORMAT_XAR: + strcpy(str, "xar"); + break; + case ARCHIVE_FORMAT_ZIP: + strcpy(str, "zip"); + break; + default: + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Invalid format code specified"); + return (ARCHIVE_FATAL); + } + + slots = sizeof(a->formats) / sizeof(a->formats[0]); + a->format = &(a->formats[0]); + for (i = 0; i < slots; i++, a->format++) { + if (!a->format->name || !strcmp(a->format->name, str)) + break; + } + if (!a->format->name || strcmp(a->format->name, str)) + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Internal error: Unable to set format"); + r1 = (ARCHIVE_FATAL); + } + + return (r1 < r2) ? r1 : r2; +} + +int +archive_read_append_filter(struct archive *_a, int code) +{ + int r1, r2, number_bidders, i; + char str[10]; + struct archive_read_filter_bidder *bidder; + struct archive_read_filter *filter; + struct archive_read *a = (struct archive_read *)_a; + + r1 = r2 = (ARCHIVE_OK); + switch (code) + { + case ARCHIVE_FILTER_NONE: + /* No filter to add, so do nothing. + * NOTE: An initial "NONE" type filter is always set at the end of the + * filter chain. + */ + r1 = (ARCHIVE_OK); + break; + case ARCHIVE_FILTER_GZIP: + strcpy(str, "gzip"); + r1 = archive_read_support_filter_gzip(_a); + break; + case ARCHIVE_FILTER_BZIP2: + strcpy(str, "bzip2"); + r1 = archive_read_support_filter_bzip2(_a); + break; + case ARCHIVE_FILTER_COMPRESS: + strcpy(str, "compress (.Z)"); + r1 = archive_read_support_filter_compress(_a); + break; + case ARCHIVE_FILTER_PROGRAM: + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Cannot append program filter using archive_read_append_filter"); + return (ARCHIVE_FATAL); + case ARCHIVE_FILTER_LZMA: + strcpy(str, "lzma"); + r1 = archive_read_support_filter_lzma(_a); + break; + case ARCHIVE_FILTER_XZ: + strcpy(str, "xz"); + r1 = archive_read_support_filter_xz(_a); + break; + case ARCHIVE_FILTER_UU: + strcpy(str, "uu"); + r1 = archive_read_support_filter_uu(_a); + break; + case ARCHIVE_FILTER_RPM: + strcpy(str, "rpm"); + r1 = archive_read_support_filter_rpm(_a); + break; + case ARCHIVE_FILTER_LZIP: + strcpy(str, "lzip"); + r1 = archive_read_support_filter_lzip(_a); + break; + case ARCHIVE_FILTER_LRZIP: + strcpy(str, "lrzip"); + r1 = archive_read_support_filter_lrzip(_a); + break; + default: + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Invalid filter code specified"); + return (ARCHIVE_FATAL); + } + + if (code != ARCHIVE_FILTER_NONE) + { + number_bidders = sizeof(a->bidders) / sizeof(a->bidders[0]); + + bidder = a->bidders; + for (i = 0; i < number_bidders; i++, bidder++) + { + if (!bidder->name || !strcmp(bidder->name, str)) + break; + } + if (!bidder->name || strcmp(bidder->name, str)) + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Internal error: Unable to append filter"); + return (ARCHIVE_FATAL); + } + + filter + = (struct archive_read_filter *)calloc(1, sizeof(*filter)); + if (filter == NULL) + { + archive_set_error(&a->archive, ENOMEM, "Out of memory"); + return (ARCHIVE_FATAL); + } + filter->bidder = bidder; + filter->archive = a; + filter->upstream = a->filter; + a->filter = filter; + r2 = (bidder->init)(a->filter); + if (r2 != ARCHIVE_OK) { + close_filters(a); + free_filters(a); + return (ARCHIVE_FATAL); + } + } + + a->bypass_filter_bidding = 1; + return (r1 < r2) ? r1 : r2; +} + +int +archive_read_append_filter_program(struct archive *_a, const char *cmd) +{ + return (archive_read_append_filter_program_signature(_a, cmd, NULL, 0)); +} + +int +archive_read_append_filter_program_signature(struct archive *_a, + const char *cmd, const void *signature, size_t signature_len) +{ + int r, number_bidders, i; + struct archive_read_filter_bidder *bidder; + struct archive_read_filter *filter; + struct archive_read *a = (struct archive_read *)_a; + + if (archive_read_support_filter_program_signature(_a, cmd, signature, + signature_len) != (ARCHIVE_OK)) + return (ARCHIVE_FATAL); + + number_bidders = sizeof(a->bidders) / sizeof(a->bidders[0]); + + bidder = a->bidders; + for (i = 0; i < number_bidders; i++, bidder++) + { + /* Program bidder name set to filter name after initialization */ + if (bidder->data && !bidder->name) + break; + } + if (!bidder->data) + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Internal error: Unable to append program filter"); + return (ARCHIVE_FATAL); + } + + filter + = (struct archive_read_filter *)calloc(1, sizeof(*filter)); + if (filter == NULL) + { + archive_set_error(&a->archive, ENOMEM, "Out of memory"); + return (ARCHIVE_FATAL); + } + filter->bidder = bidder; + filter->archive = a; + filter->upstream = a->filter; + a->filter = filter; + r = (bidder->init)(a->filter); + if (r != ARCHIVE_OK) { + close_filters(a); + free_filters(a); + return (ARCHIVE_FATAL); + } + bidder->name = a->filter->name; + + a->bypass_filter_bidding = 1; + return r; +} |