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-rw-r--r--lib/comp/lzo.c321
1 files changed, 0 insertions, 321 deletions
diff --git a/lib/comp/lzo.c b/lib/comp/lzo.c
deleted file mode 100644
index 09ef75c..0000000
--- a/lib/comp/lzo.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * lzo.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <ctype.h>
-
-#include <lzo/lzo1x.h>
-
-#include "internal.h"
-
-
-typedef enum {
- LZO_ALGORITHM_LZO1X_1 = 0,
- LZO_ALGORITHM_LZO1X_1_11 = 1,
- LZO_ALGORITHM_LZO1X_1_12 = 2,
- LZO_ALGORITHM_LZO1X_1_15 = 3,
- LZO_ALGORITHM_LZO1X_999 = 4,
-} LZO_ALGORITHM;
-
-#define LZO_DEFAULT_ALG LZO_ALGORITHM_LZO1X_999
-#define LZO_DEFAULT_LEVEL 8
-#define LZO_NUM_ALGS (sizeof(lzo_algs) / sizeof(lzo_algs[0]))
-
-typedef int (*lzo_cb_t)(const lzo_bytep src, lzo_uint src_len, lzo_bytep dst,
- lzo_uintp dst_len, lzo_voidp wrkmem);
-
-static const struct {
- const char *name;
- lzo_cb_t compress;
- size_t bufsize;
-} lzo_algs[] = {
- [LZO_ALGORITHM_LZO1X_1] = {
- .name = "lzo1x_1",
- .compress = lzo1x_1_compress,
- .bufsize = LZO1X_1_MEM_COMPRESS,
- },
- [LZO_ALGORITHM_LZO1X_1_11] = {
- .name = "lzo1x_1_11",
- .compress = lzo1x_1_11_compress,
- .bufsize = LZO1X_1_11_MEM_COMPRESS,
- },
- [LZO_ALGORITHM_LZO1X_1_12] = {
- .name = "lzo1x_1_12",
- .compress = lzo1x_1_12_compress,
- .bufsize = LZO1X_1_12_MEM_COMPRESS,
- },
- [LZO_ALGORITHM_LZO1X_1_15] = {
- .name = "lzo1x_1_15",
- .compress = lzo1x_1_15_compress,
- .bufsize = LZO1X_1_15_MEM_COMPRESS,
- },
- [LZO_ALGORITHM_LZO1X_999] = {
- .name = "lzo1x_999",
- .compress = lzo1x_999_compress,
- .bufsize = LZO1X_999_MEM_COMPRESS,
- },
-};
-
-typedef struct {
- compressor_t base;
- int algorithm;
- int level;
-
- uint8_t buffer[];
-} lzo_compressor_t;
-
-typedef struct {
- uint32_t algorithm;
- uint32_t level;
-} lzo_options_t;
-
-static int lzo_write_options(compressor_t *base, int fd)
-{
- lzo_compressor_t *lzo = (lzo_compressor_t *)base;
- lzo_options_t opt;
-
- if (lzo->algorithm == LZO_DEFAULT_ALG &&
- lzo->level == LZO_DEFAULT_LEVEL) {
- return 0;
- }
-
- opt.algorithm = htole32(lzo->algorithm);
-
- if (lzo->algorithm == LZO_ALGORITHM_LZO1X_999) {
- opt.level = htole32(lzo->level);
- } else {
- opt.level = 0;
- }
-
- return generic_write_options(fd, &opt, sizeof(opt));
-}
-
-static int lzo_read_options(compressor_t *base, int fd)
-{
- lzo_compressor_t *lzo = (lzo_compressor_t *)base;
- lzo_options_t opt;
-
- if (generic_read_options(fd, &opt, sizeof(opt)))
- return -1;
-
- lzo->algorithm = le32toh(opt.algorithm);
- lzo->level = le32toh(opt.level);
-
- switch(lzo->algorithm) {
- case LZO_ALGORITHM_LZO1X_1:
- case LZO_ALGORITHM_LZO1X_1_11:
- case LZO_ALGORITHM_LZO1X_1_12:
- case LZO_ALGORITHM_LZO1X_1_15:
- if (lzo->level != 0)
- goto fail_level;
- break;
- case LZO_ALGORITHM_LZO1X_999:
- if (lzo->level < 1 || lzo->level > 9)
- goto fail_level;
- break;
- default:
- fputs("Unsupported LZO variant specified.\n", stderr);
- return -1;
- }
-
- return 0;
-fail_level:
- fputs("Unsupported LZO compression level specified.\n", stderr);
- return -1;
-}
-
-static ssize_t lzo_comp_block(compressor_t *base, const uint8_t *in,
- size_t size, uint8_t *out, size_t outsize)
-{
- lzo_compressor_t *lzo = (lzo_compressor_t *)base;
- lzo_uint len = outsize;
- int ret;
-
- if (lzo->algorithm == LZO_ALGORITHM_LZO1X_999 &&
- lzo->level != LZO_DEFAULT_LEVEL) {
- ret = lzo1x_999_compress_level(in, size, out, &len,
- lzo->buffer, NULL, 0, 0,
- lzo->level);
- } else {
- ret = lzo_algs[lzo->algorithm].compress(in, size, out,
- &len, lzo->buffer);
- }
-
- if (ret != LZO_E_OK) {
- fputs("LZO compression failed.\n", stderr);
- return -1;
- }
-
- if (len < size)
- return len;
-
- return 0;
-}
-
-static ssize_t lzo_uncomp_block(compressor_t *base, const uint8_t *in,
- size_t size, uint8_t *out, size_t outsize)
-{
- lzo_compressor_t *lzo = (lzo_compressor_t *)base;
- lzo_uint len = outsize;
- int ret;
-
- ret = lzo1x_decompress_safe(in, size, out, &len, lzo->buffer);
-
- if (ret != LZO_E_OK) {
- fputs("lzo decompress: input data is corrupted\n", stderr);
- return -1;
- }
-
- return len;
-}
-
-static compressor_t *lzo_create_copy(compressor_t *cmp)
-{
- lzo_compressor_t *other = (lzo_compressor_t *)cmp;
- lzo_compressor_t *lzo;
-
- lzo = alloc_flex(sizeof(*lzo), 1, lzo_algs[other->algorithm].bufsize);
-
- if (lzo == NULL) {
- perror("creating additional lzo compressor");
- return NULL;
- }
-
- memcpy(lzo, other, sizeof(*lzo));
- return (compressor_t *)lzo;
-}
-
-static void lzo_destroy(compressor_t *base)
-{
- free(base);
-}
-
-static int process_options(char *options, int *algorithm, int *level)
-{
- enum {
- OPT_ALG = 0,
- OPT_LEVEL,
- };
- char *const token[] = {
- [OPT_ALG] = (char *)"algorithm",
- [OPT_LEVEL] = (char *)"level",
- NULL
- };
- char *subopts, *value;
- size_t i;
- int opt;
-
- subopts = options;
-
- while (*subopts != '\0') {
- opt = getsubopt(&subopts, token, &value);
-
- switch (opt) {
- case OPT_ALG:
- if (value == NULL)
- goto fail_value;
-
- for (i = 0; i < LZO_NUM_ALGS; ++i) {
- if (strcmp(lzo_algs[i].name, value) == 0) {
- *algorithm = i;
- break;
- }
- }
-
- if (i == LZO_NUM_ALGS) {
- fprintf(stderr, "Unknown lzo variant '%s'.\n",
- value);
- return -1;
- }
- break;
- case OPT_LEVEL:
- if (value == NULL)
- goto fail_value;
-
- for (i = 0; isdigit(value[i]); ++i)
- ;
-
- if (i < 1 || i > 3 || value[i] != '\0')
- goto fail_level;
-
- *level = atoi(value);
-
- if (*level < 1 || *level > 9)
- goto fail_level;
- break;
- default:
- goto fail_opt;
- }
- }
-
- return 0;
-fail_level:
- fputs("Compression level must be a number between 1 and 9.\n", stderr);
- return -1;
-fail_opt:
- fprintf(stderr, "Unknown option '%s'.\n", value);
- return -1;
-fail_value:
- fprintf(stderr, "Missing value for '%s'.\n", token[opt]);
- return -1;
-}
-
-compressor_t *create_lzo_compressor(bool compress, size_t block_size,
- char *options)
-{
- lzo_compressor_t *lzo;
- compressor_t *base;
- int level, alg;
- (void)block_size;
-
- alg = LZO_DEFAULT_ALG;
- level = LZO_DEFAULT_LEVEL;
-
- if (options != NULL && process_options(options, &alg, &level) != 0)
- return NULL;
-
- lzo = alloc_flex(sizeof(*lzo), 1, lzo_algs[alg].bufsize);
- base = (compressor_t *)lzo;
-
- if (lzo == NULL) {
- perror("creating lzo compressor");
- return NULL;
- }
-
- lzo->algorithm = alg;
- lzo->level = level;
-
- base->destroy = lzo_destroy;
- base->do_block = compress ? lzo_comp_block : lzo_uncomp_block;
- base->write_options = lzo_write_options;
- base->read_options = lzo_read_options;
- base->create_copy = lzo_create_copy;
- return base;
-}
-
-void compressor_lzo_print_help(void)
-{
- size_t i;
-
- fputs("Available options for lzo compressor:\n"
- "\n"
- " algorithm=<name> Specify the variant of lzo to use.\n"
- " Defaults to 'lzo1x_999'.\n"
- " level=<value> For lzo1x_999, the compression level.\n"
- " Value from 1 to 9. Defaults to 8.\n"
- " Ignored if algorithm is not lzo1x_999.\n"
- "\n"
- "Available algorithms:\n",
- stdout);
-
- for (i = 0; i < LZO_NUM_ALGS; ++i)
- printf("\t%s\n", lzo_algs[i].name);
-}
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