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Merge pull request #2065 from cwoffenden/single-file-lib

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Single-file decoder script can now (optionally) create an encoder
This commit is contained in:
Yann Collet 2020-04-07 10:17:05 -07:00 committed by GitHub
commit dde98d833d
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32 changed files with 3921 additions and 3917 deletions
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3
Makefile
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@ -109,7 +109,8 @@ contrib: lib
$(MAKE) -C contrib/pzstd all
$(MAKE) -C contrib/seekable_format/examples all
$(MAKE) -C contrib/largeNbDicts all
cd contrib/single_file_decoder/ ; ./build_test.sh
cd contrib/single_file_libs/ ; ./build_decoder_test.sh
cd contrib/single_file_libs/ ; ./build_library_test.sh
.PHONY: cleanTabs
cleanTabs:

2
contrib/single_file_decoder/.gitignore vendored
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@ -1,2 +0,0 @@
zstddeclib.c

18
contrib/single_file_decoder/README.md
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@ -1,18 +0,0 @@
# Single File Zstandard Decompression Library
The script `combine.sh` creates an _amalgamated_ source file that can be used with or without `zstd.h`. This isn't a _header-only_ file but it does offer a similar level of simplicity when integrating into a project.
Create `zstddeclib.c` from the Zstd source using:
```
cd zstd/contrib/declib
./combine.sh -r ../../lib -r ../../lib/common -r ../../lib/decompress -o zstddeclib.c zstddeclib-in.c
```
Then add the resulting file to your project (see the [example files](examples)).
`create_single_file_decoder.sh` will run the above script, creating file `zstddeclib.c`.
`build_test.sh` will create the decoder, then compile and test the library.
Why?
----
Because all it now takes to support decompressing Zstd is the addition of a single file, two if using the header, with no configuration or further build steps. The library is small, adding, for example, 26kB to an Emscripten compiled WebAssembly project. Native implementations add a little more, 40-70kB depending on the compiler and platform.

124
contrib/single_file_decoder/combine.sh
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@ -1,124 +0,0 @@
#!/bin/sh -e
# Tool to bundle multiple C/C++ source files, inlining any includes.
#
# Note: this POSIX-compliant script is many times slower than the original bash
# implementation (due to the grep calls) but it runs and works everywhere.
#
# TODO: ROOTS and FOUND as arrays (since they fail on paths with spaces)
#
# Author: Carl Woffenden, Numfum GmbH (released under a CC0 license)
# Common file roots
ROOTS="./"
# Files previously visited
FOUND=""
# Optional destination file (empty string to write to stdout)
DESTN=""
# Prints the script usage then exits
usage() {
echo "Usage: $0 [-r <path>] [-o <outfile>] infile"
echo " -r file root search paths"
echo " -o output file (otherwise stdout)"
echo "Example: $0 -r ../my/path - r ../other/path -o out.c in.c"
exit 1
}
# Tests that the grep implementation works as expected (older OSX grep fails)
test_grep() {
if ! echo '#include "foo"' | grep -Eq '^\s*#\s*include\s*".+"'; then
echo "Aborting: the grep implementation fails to parse include lines"
exit 1
fi
}
# Tests if list $1 has item $2 (returning zero on a match)
list_has_item() {
if echo "$1" | grep -Eq "(^|\s*)$2(\$|\s*)"; then
return 0
else
return 1
fi
}
# Adds a new line with the supplied arguments to $DESTN (or stdout)
write_line() {
if [ -n "$DESTN" ]; then
printf '%s\n' "$@" >> "$DESTN"
else
printf '%s\n' "$@"
fi
}
# Adds the contents of $1 with any of its includes inlined
add_file() {
# Match the path
local file=
if [ -f "$1" ]; then
file="$1"
else
for root in $ROOTS; do
if test -f "$root/$1"; then
file="$root/$1"
fi
done
fi
if [ -n "$file" ]; then
# Read the file
local line=
while IFS= read -r line; do
if echo "$line" | grep -Eq '^\s*#\s*include\s*".+"'; then
# We have an include directive so strip the (first) file
local inc=$(echo "$line" | grep -Eo '".*"' | grep -Eo '\w*(\.?\w+)+' | head -1)
if ! list_has_item "$FOUND" "$inc"; then
# And we've not previously encountered it
FOUND="$FOUND $inc"
write_line "/**** start inlining $inc ****/"
add_file "$inc"
write_line "/**** ended inlining $inc ****/"
else
write_line "/**** skipping file: $inc ****/"
fi
else
# Otherwise write the source line
write_line "$line"
fi
done < "$file"
else
write_line "#error Unable to find \"$1\""
fi
}
while getopts ":r:o:" opts; do
case $opts in
r)
ROOTS="$OPTARG $ROOTS"
;;
o)
DESTN="$OPTARG"
;;
*)
usage
;;
esac
done
shift $((OPTIND-1))
if [ -n "$1" ]; then
if [ -f "$1" ]; then
if [ -n "$DESTN" ]; then
printf "" > "$DESTN"
fi
test_grep
add_file $1
else
echo "Input file not found: \"$1\""
exit 1
fi
else
usage
fi
exit 0

600
contrib/single_file_decoder/examples/emscripten.c
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@ -1,600 +0,0 @@
/**
* \file emscripten.c
* Emscripten example of using the single-file \c zstddeclib. Draws a rotating
* textured quad with data from the in-line Zstd compressed DXT1 texture (DXT1
* being hardware compression, further compressed with Zstd).
* \n
* Compile using:
* \code
* export CC_FLAGS="-Wall -Wextra -Werror -Os -g0 -flto --llvm-lto 3 -lGL -DNDEBUG=1"
* export EM_FLAGS="-s WASM=1 -s ENVIRONMENT=web --shell-file shell.html --closure 1"
* emcc $CC_FLAGS $EM_FLAGS -o out.html emscripten.c
* \endcode
*
* \author Carl Woffenden, Numfum GmbH (released under a CC0 license)
*/
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <emscripten/emscripten.h>
#include <emscripten/html5.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "../zstddeclib.c"
//************************* Test Data (DXT texture) **************************/
/**
* Zstd compressed DXT1 256x256 texture source.
* \n
* See \c testcard.png for the original.
*/
static uint8_t const srcZstd[] = {
0x28, 0xb5, 0x2f, 0xfd, 0x60, 0x00, 0x7f, 0x6d, 0x61, 0x00, 0x0a, 0x66,
0xec, 0x17, 0x48, 0x60, 0x1c, 0x5a, 0xc9, 0x5d, 0x1a, 0x38, 0x07, 0xe8,
0xc5, 0x82, 0x99, 0x68, 0xe6, 0x95, 0x45, 0x58, 0x0d, 0x0c, 0xf3, 0x36,
0xc8, 0xd9, 0x0f, 0x46, 0x2d, 0x68, 0x11, 0xf8, 0x31, 0x10, 0xa1, 0x1a,
0x2f, 0x99, 0x5c, 0x84, 0xfd, 0x92, 0x02, 0xe6, 0x3b, 0x44, 0x9b, 0x01,
0x5d, 0x92, 0xff, 0x38, 0x26, 0x00, 0x6a, 0x6b, 0xc3, 0x53, 0xb2, 0x0c,
0x25, 0xf3, 0xd8, 0x59, 0x68, 0x9b, 0x14, 0x8a, 0x89, 0x75, 0x18, 0x03,
0x1d, 0xc9, 0x0f, 0x63, 0x01, 0x73, 0x01, 0x72, 0x01, 0x4f, 0x66, 0x31,
0x58, 0x0f, 0x97, 0x4b, 0x0c, 0x4c, 0x06, 0xac, 0x07, 0x0b, 0x68, 0xd4,
0xad, 0x80, 0x64, 0x13, 0x74, 0xa1, 0x12, 0x16, 0x58, 0xcf, 0x1a, 0x95,
0x5f, 0x0d, 0x26, 0x55, 0xd0, 0x9c, 0xf4, 0x52, 0x35, 0x2e, 0x20, 0xc1,
0x06, 0x69, 0x03, 0x0a, 0x93, 0x83, 0x5e, 0x27, 0x9b, 0x4c, 0x6d, 0xee,
0x87, 0x03, 0x30, 0x6c, 0x46, 0xd7, 0x50, 0x5c, 0xca, 0xe6, 0xa6, 0x4d,
0xa8, 0xf6, 0xab, 0xd7, 0x0e, 0x27, 0x27, 0x90, 0xc4, 0xb2, 0xd1, 0x10,
0xfa, 0x43, 0x82, 0xc8, 0xf2, 0xe5, 0xff, 0xff, 0xd5, 0x52, 0x62, 0x43,
0x87, 0x26, 0x2a, 0x05, 0x70, 0x0e, 0xb0, 0x2f, 0xc4, 0x56, 0xef, 0xb5,
0xca, 0xb8, 0x53, 0xb7, 0x96, 0x0e, 0xe7, 0x00, 0x2c, 0xa8, 0xda, 0x3b,
0x07, 0x70, 0xa7, 0x78, 0x38, 0x60, 0x87, 0x7a, 0x01, 0x3b, 0x75, 0xec,
0xfa, 0x77, 0xe2, 0x46, 0x94, 0x61, 0x8e, 0x0d, 0x0c, 0xfb, 0xe7, 0x8b,
0x13, 0x50, 0x31, 0xa9, 0x27, 0xcd, 0x27, 0xef, 0x6b, 0xa6, 0xab, 0x9c,
0x4d, 0x95, 0x6c, 0x3a, 0xbb, 0x8e, 0x96, 0x92, 0x18, 0x5a, 0x7c, 0x4f,
0xff, 0x7b, 0x38, 0xf2, 0xdb, 0x86, 0xde, 0xff, 0x1f, 0x2f, 0x21, 0x86,
0x7d, 0xbf, 0x45, 0xd0, 0x6e, 0x77, 0x0a, 0xee, 0x0a, 0xee, 0x14, 0x9a,
0xb8, 0x84, 0xf3, 0xac, 0xbe, 0xc8, 0x7f, 0x8d, 0xff, 0xff, 0xcf, 0x2a,
0xfb, 0x69, 0xfc, 0xfb, 0xfd, 0x7a, 0x10, 0x22, 0x36, 0xfc, 0xff, 0x3f,
0xcf, 0xd0, 0xf1, 0x7f, 0xfe, 0xff, 0x3d, 0x24, 0xdf, 0x78, 0x4a, 0xff,
0xda, 0x9c, 0x39, 0xcf, 0xef, 0xe7, 0xfd, 0x52, 0x98, 0xb5, 0x40, 0x92,
0xee, 0xdd, 0x99, 0xf5, 0x53, 0x5b, 0x65, 0x6b, 0xb5, 0xd8, 0x7b, 0xae,
0xfa, 0xc1, 0x0f, 0x0c, 0x7f, 0x4f, 0x55, 0xa3, 0xad, 0x2c, 0xa0, 0xbd,
0xf7, 0x2a, 0x0e, 0xe8, 0xbd, 0xc7, 0x5e, 0xf5, 0xd8, 0x54, 0x9e, 0x56,
0xa3, 0xd6, 0x59, 0xd5, 0xfe, 0x1f, 0xc0, 0x30, 0x8c, 0xfc, 0x46, 0x04,
0xae, 0x60, 0xbc, 0xe8, 0xcf, 0xec, 0x3d, 0xde, 0xf9, 0xf0, 0xfe, 0xef,
0x7d, 0xcc, 0xf7, 0x2b, 0xe5, 0x1b, 0x70, 0xff, 0xff, 0x7e, 0x3f, 0x6e,
0xe4, 0x02, 0x07, 0xfc, 0x1b, 0x7a, 0xff, 0xe7, 0x58, 0xfc, 0x7e, 0x3a,
0xdc, 0x97, 0xfd, 0x57, 0xef, 0xa3, 0xfc, 0x2a, 0xc7, 0x4d, 0xf3, 0xcb,
0x9d, 0xce, 0xac, 0xfe, 0xeb, 0x2e, 0x86, 0xb9, 0x69, 0x54, 0xef, 0xf9,
0x55, 0xcf, 0xff, 0x48, 0x24, 0x72, 0x3a, 0x9d, 0x72, 0x2f, 0x2f, 0x2f,
0xff, 0x3f, 0xe7, 0x01, 0x6c, 0x4d, 0x6c, 0xcd, 0x2d, 0x5b, 0x53, 0xb7,
0x59, 0x22, 0x08, 0x0b, 0xa7, 0x92, 0x15, 0x75, 0x93, 0xb0, 0x5d, 0xaf,
0x2a, 0x63, 0x95, 0x1d, 0x25, 0xd2, 0xd2, 0xa8, 0x1c, 0x84, 0xc9, 0xdc,
0x72, 0xba, 0xd7, 0xfc, 0x69, 0xf5, 0xc7, 0x19, 0xa9, 0xbe, 0xfa, 0x26,
0x55, 0x25, 0x75, 0xb7, 0x60, 0xa3, 0xd8, 0x68, 0x54, 0xb7, 0x1b, 0xa5,
0x54, 0x62, 0xb1, 0x49, 0xde, 0xe2, 0xac, 0xa2, 0xe8, 0x7b, 0xff, 0x5f,
0x75, 0x4e, 0xb8, 0xa2, 0xdd, 0x6a, 0xb7, 0xda, 0x6e, 0x2e, 0x04, 0xcd,
0x08, 0x2f, 0xec, 0x8e, 0x49, 0xaf, 0x49, 0x6f, 0x8b, 0x4f, 0x2e, 0x1a,
0xc5, 0x62, 0x7b, 0x6b, 0x3e, 0x32, 0x3e, 0x32, 0xbe, 0x08, 0x35, 0x4d,
0x63, 0x93, 0xa6, 0xc8, 0x42, 0xe6, 0x21, 0xcc, 0x59, 0xc8, 0x4c, 0xe5,
0x86, 0xe1, 0x03, 0x06, 0xa4, 0xec, 0xff, 0xb7, 0x78, 0x7e, 0x62, 0x43,
0xc7, 0x2c, 0x50, 0x30, 0x4a, 0xc8, 0x9b, 0xf3, 0xbf, 0xe6, 0x62, 0xa0,
0x50, 0xa6, 0x9c, 0xe3, 0x6e, 0x5b, 0xaf, 0x77, 0x8b, 0xbb, 0xe1, 0x70,
0xaa, 0xaa, 0xaa, 0x92, 0xb4, 0x52, 0xad, 0x14, 0x87, 0x93, 0x0b, 0xe6,
0x82, 0x39, 0x11, 0xb9, 0x20, 0x9a, 0x16, 0x34, 0x22, 0x68, 0xb2, 0x68,
0xb2, 0x76, 0xd3, 0xe8, 0x6e, 0xda, 0x6b, 0x62, 0x34, 0x2e, 0x8d, 0xbd,
0x2d, 0x3d, 0x6b, 0x4c, 0x26, 0x33, 0xda, 0x33, 0xf3, 0x91, 0x51, 0x46,
0x79, 0xbd, 0x3e, 0x39, 0x9f, 0xcf, 0xd2, 0xb8, 0x5c, 0xfa, 0x22, 0xf8,
0x8e, 0xb6, 0xbe, 0x08, 0x40, 0x14, 0x49, 0x40, 0x14, 0xf2, 0x0c, 0x2d,
0x30, 0x85, 0x3c, 0x63, 0x29, 0xd3, 0x98, 0x85, 0x6c, 0xb5, 0xdb, 0xad,
0x5c, 0x63, 0x9e, 0x72, 0xcf, 0x43, 0xe6, 0xaf, 0x77, 0xa6, 0xe2, 0x21,
0x0c, 0x4d, 0xd3, 0x49, 0x1e, 0xc2, 0x14, 0x6f, 0xee, 0xdb, 0x7b, 0x7b,
0x08, 0xb3, 0xa4, 0x60, 0x3b, 0x9d, 0x6e, 0x8b, 0x37, 0x4b, 0x0a, 0x74,
0x35, 0x33, 0xbc, 0xf9, 0x64, 0x85, 0x63, 0x32, 0x29, 0x20, 0x59, 0x0c,
0x3c, 0x96, 0x67, 0x62, 0xb7, 0x8a, 0x92, 0x4d, 0xa0, 0xd3, 0xf3, 0xd1,
0x85, 0x80, 0x38, 0xcb, 0x64, 0x60, 0xc9, 0xb5, 0xaf, 0x97, 0x8d, 0x20,
0x45, 0x28, 0xb8, 0xab, 0xe8, 0xc9, 0x0a, 0x88, 0x1f, 0xd6, 0x47, 0x54,
0xf1, 0xd3, 0xfb, 0x62, 0xa7, 0xfd, 0xf2, 0x8b, 0xfd, 0xb6, 0xe4, 0x2e,
0xb6, 0x91, 0x73, 0x1c, 0xd0, 0x7b, 0xba, 0x83, 0xc9, 0xac, 0x51, 0x39,
0x92, 0xc5, 0x4f, 0x30, 0x1e, 0x2e, 0xd5, 0xf1, 0xa8, 0xa6, 0xa5, 0x80,
0x70, 0xb9, 0xbc, 0xb7, 0xc2, 0x52, 0x32, 0x6c, 0xe3, 0x3d, 0xed, 0x41,
0xa4, 0x4b, 0x31, 0x2a, 0xe6, 0x62, 0x11, 0x19, 0x95, 0x73, 0x1d, 0xbf,
0xe1, 0x6c, 0xfc, 0x47, 0x75, 0x6c, 0x37, 0x63, 0x02, 0xf8, 0x34, 0x40,
0x9a, 0x00, 0x1d, 0xf7, 0x32, 0x56, 0x77, 0xda, 0x5b, 0x9f, 0x9f, 0x0f,
0xbb, 0x91, 0x5b, 0xbd, 0xe7, 0x58, 0x82, 0x4a, 0x20, 0xcd, 0x4f, 0x47,
0x15, 0xf3, 0x51, 0xf1, 0x43, 0x51, 0x10, 0x96, 0xae, 0xba, 0xf7, 0x21,
0x50, 0xef, 0x55, 0x27, 0x0c, 0x1f, 0xe0, 0x54, 0xf8, 0xc9, 0x69, 0xef,
0xb9, 0x53, 0xf7, 0x83, 0x73, 0x9d, 0xce, 0x86, 0x07, 0x83, 0x44, 0x61,
0x37, 0x35, 0x35, 0x33, 0x4e, 0x33, 0x33, 0x3e, 0x9f, 0x50, 0x48, 0x24,
0xe6, 0xd0, 0x79, 0x49, 0xc3, 0x2d, 0xa0, 0x46, 0x31, 0x9a, 0x72, 0xc3,
0x84, 0xff, 0x7a, 0x95, 0xbb, 0x00, 0x22, 0xcc, 0x14, 0x00, 0x04, 0xac,
0x60, 0x64, 0x86, 0xe4, 0x6f, 0xb1, 0x58, 0xf4, 0xdc, 0xb0, 0x05, 0x00,
0x72, 0x38, 0xf8, 0xce, 0xce, 0x8e, 0xcf, 0x37, 0x33, 0x43, 0x24, 0x0a,
0x85, 0x33, 0x35, 0x35, 0x37, 0xc2, 0xa8, 0x28, 0x27, 0x1b, 0x9d, 0xce,
0x29, 0x18, 0xe4, 0xfc, 0x09, 0x53, 0xa5, 0x51, 0xad, 0x74, 0x79, 0x7b,
0xb5, 0x4a, 0x65, 0x94, 0x36, 0x89, 0xf5, 0x62, 0x9b, 0xd8, 0x9a, 0xe8,
0x2b, 0xff, 0xa1, 0x73, 0xfe, 0x2e, 0x2c, 0x41, 0x45, 0x37, 0xef, 0x6e,
0x7b, 0x38, 0xca, 0xa5, 0xd2, 0xb8, 0x1c, 0x3b, 0x96, 0x21, 0xbb, 0x5d,
0xad, 0xd1, 0xdb, 0x1c, 0xf6, 0x5e, 0x4b, 0xd9, 0x59, 0x1b, 0x67, 0xf5,
0x7a, 0x7c, 0x9a, 0x91, 0x3e, 0x8e, 0xe3, 0xee, 0x7b, 0xb9, 0xa4, 0xb9,
0xf5, 0x70, 0xee, 0x1d, 0x4e, 0x4f, 0xcc, 0xd6, 0x7b, 0x07, 0x71, 0x48,
0xf2, 0x06, 0xd0, 0x10, 0x82, 0x21, 0xe4, 0x55, 0x2e, 0xa5, 0x1d, 0xbe,
0x48, 0x8c, 0x69, 0xbb, 0x24, 0x40, 0x68, 0x9b, 0xba, 0x5a, 0x5a, 0xa7,
0xe2, 0xd1, 0xac, 0xc2, 0xd8, 0x87, 0x9c, 0xe3, 0x78, 0xee, 0xa6, 0xcd,
0xdd, 0x68, 0x6e, 0xdd, 0xdb, 0x2e, 0xc6, 0xbb, 0x8b, 0xe9, 0xc1, 0xd9,
0xf6, 0x62, 0x7e, 0x72, 0x7e, 0x72, 0x34, 0xe4, 0x68, 0xc8, 0x11, 0x32,
0x10, 0x32, 0x20, 0x32, 0xf0, 0x12, 0x19, 0x90, 0xe0, 0x45, 0x91, 0xe0,
0x25, 0x83, 0xba, 0xc9, 0x20, 0x26, 0x87, 0xa5, 0x72, 0xa9, 0x64, 0x72,
0x80, 0x21, 0x54, 0x13, 0xeb, 0x29, 0x18, 0x42, 0x34, 0x84, 0x94, 0x34,
0x84, 0xa4, 0x1d, 0xa4, 0x1d, 0x82, 0x1c, 0xef, 0xaf, 0x0e, 0x63, 0x47,
0x6d, 0x10, 0xb9, 0xec, 0xd8, 0x2d, 0x3b, 0x9e, 0x21, 0xb1, 0x67, 0x48,
0x34, 0x24, 0x1a, 0x52, 0xdb, 0xa4, 0x6d, 0x62, 0xd3, 0xfa, 0xff, 0xfa,
0x03, 0x34, 0xef, 0x9d, 0xc9, 0xe1, 0x5d, 0xec, 0xf5, 0xf1, 0x79, 0x8c,
0x97, 0xd2, 0x24, 0xc1, 0x2d, 0xe0, 0x39, 0x16, 0x1e, 0xa9, 0x41, 0xc3,
0xbf, 0x4a, 0xd9, 0x3c, 0xea, 0x77, 0x96, 0x55, 0xe6, 0x95, 0xc3, 0xf1,
0x8e, 0x7b, 0x4f, 0xad, 0x61, 0xf8, 0xe7, 0x01, 0xad, 0x46, 0xf5, 0x2c,
0xac, 0x55, 0x2c, 0x94, 0xaa, 0x46, 0xfb, 0x5e, 0xcd, 0xaa, 0x1f, 0x78,
0x4f, 0x2f, 0xd1, 0xc9, 0x02, 0xd6, 0x2c, 0x67, 0xef, 0x3f, 0x54, 0xab,
0xda, 0x03, 0x79, 0x1f, 0xab, 0xfd, 0x0c, 0x38, 0x3c, 0xbc, 0xe1, 0xd5,
0x01, 0xf6, 0xfb, 0xfb, 0xf1, 0x70, 0xee, 0xfd, 0x90, 0x13, 0x97, 0xc4,
0xbc, 0x08, 0xe7, 0x4b, 0x88, 0x34, 0xf7, 0x56, 0x1e, 0x0c, 0xdb, 0xe4,
0x9c, 0x78, 0xf1, 0xf4, 0x62, 0x4c, 0xb5, 0xf7, 0xdd, 0xd9, 0x4c, 0x5a,
0x69, 0xa6, 0x36, 0x27, 0x03, 0xbe, 0x86, 0xc2, 0x72, 0xa2, 0x60, 0x73,
0xf1, 0xe0, 0x17, 0x50, 0xb5, 0x93, 0x81, 0xac, 0xf1, 0xc9, 0xd4, 0x66,
0x73, 0x71, 0xce, 0x63, 0xa8, 0x60, 0x98, 0xda, 0x86, 0x46, 0x72, 0xec,
0x54, 0xc1, 0xe6, 0x8a, 0x10, 0x23, 0x2d, 0x0c, 0xdd, 0x44, 0x0b, 0xa0,
0x44, 0xa4, 0x9d, 0x0e, 0x64, 0x31, 0x30, 0x45, 0xb1, 0x97, 0x4c, 0x6d,
0x9f, 0x43, 0x99, 0x71, 0xa8, 0x9a, 0xe6, 0xbd, 0x3a, 0xe1, 0xff, 0x7f,
0x33, 0x61, 0xf1, 0x48, 0xda, 0x48, 0x28, 0x10, 0x23, 0x9b, 0x24, 0xeb,
0xee, 0xbd, 0x35, 0x0e, 0x6e, 0x75, 0x23, 0x20, 0xd6, 0x95, 0x8c, 0xa5,
0x24, 0xec, 0x44, 0x67, 0x52, 0x2e, 0x78, 0x2a, 0xba, 0x3e, 0x3a, 0x4e,
0xc9, 0x5c, 0x23, 0xb0, 0xd5, 0xfb, 0x29, 0xaf, 0x9a, 0x0b, 0x90, 0x89,
0xd8, 0xec, 0xa9, 0xa8, 0x13, 0xfc, 0x22, 0xfa, 0xf2, 0x74, 0x2f, 0x4e,
0x35, 0xb0, 0x6d, 0x6c, 0xfd, 0xc4, 0xfe, 0xd0, 0x98, 0x3d, 0xe5, 0x43,
0x0a, 0xd0, 0x33, 0x26, 0x3b, 0x12, 0x7d, 0x65, 0xa1, 0xff, 0xff, 0x6f,
0x53, 0x0e, 0x28, 0x84, 0xa7, 0xa2, 0x2e, 0xf8, 0x4a, 0xb6, 0xa1, 0x47,
0xf5, 0xd0, 0x13, 0x9d, 0xd9, 0x50, 0xef, 0x9f, 0x31, 0xb4, 0x13, 0x67,
0xf9, 0x0a, 0x99, 0xb5, 0x80, 0xec, 0x4a, 0x1a, 0x59, 0x21, 0x3b, 0xce,
0xc5, 0x7e, 0x96, 0x85, 0x92, 0xc5, 0xb0, 0x75, 0xaa, 0x41, 0x16, 0xa9,
0xd3, 0xde, 0x13, 0x7d, 0xd9, 0x61, 0x30, 0x1c, 0x73, 0x61, 0x54, 0x90,
0xcf, 0xd4, 0xe8, 0xfe, 0xbf, 0xbf, 0x36, 0x57, 0x26, 0x38, 0xab, 0x06,
0xc4, 0x7e, 0x3c, 0x5b, 0x35, 0xd2, 0x7c, 0x2c, 0x0a, 0x82, 0xf2, 0xa8,
0xf2, 0x8b, 0x48, 0xa9, 0x90, 0x00, 0x01, 0x10, 0x10, 0x14, 0x04, 0x00,
0x32, 0xa2, 0x06, 0x82, 0x28, 0x90, 0xc2, 0xb4, 0x85, 0xda, 0x01, 0x52,
0xe9, 0x18, 0x85, 0x60, 0x00, 0x00, 0x20, 0x0c, 0x00, 0x14, 0x41, 0x00,
0x40, 0xa0, 0x04, 0x40, 0x00, 0x80, 0x50, 0x03, 0x01, 0x10, 0x18, 0x01,
0x80, 0xd4, 0x14, 0x99, 0x01, 0xfd, 0x07, 0xf8, 0x16, 0x0e, 0xd9, 0x5d,
0xa3, 0x70, 0xfe, 0xda, 0x17, 0xfa, 0xce, 0x46, 0x9a, 0x99, 0x81, 0x1a,
0x39, 0xba, 0x63, 0xb1, 0x18, 0x11, 0x58, 0xd7, 0xc7, 0xba, 0x03, 0x3e,
0x01, 0xf2, 0xf9, 0x4e, 0x12, 0xa3, 0x50, 0x7b, 0xaf, 0x7b, 0x60, 0x5c,
0x83, 0x23, 0xd2, 0x60, 0x27, 0x84, 0xad, 0xb8, 0x02, 0xed, 0xfe, 0xb4,
0x9c, 0x08, 0x9f, 0x49, 0xae, 0x55, 0x02, 0x94, 0xc0, 0x1b, 0x90, 0x75,
0x0b, 0x90, 0xc4, 0xc7, 0x43, 0x9e, 0x67, 0x25, 0x70, 0x61, 0x0d, 0xb8,
0x7a, 0x97, 0x43, 0xfc, 0xd1, 0x7e, 0x68, 0xed, 0x03, 0xb7, 0x1e, 0x75,
0xe9, 0x4d, 0x7a, 0x23, 0x18, 0x37, 0x63, 0x6f, 0xab, 0x5f, 0x7c, 0x5b,
0x1c, 0x05, 0xdf, 0x3f, 0x00, 0x86, 0x37, 0xa0, 0xfa, 0x0c, 0xe0, 0xed,
0x35, 0x35, 0x2f, 0xd8, 0xd1, 0x75, 0xba, 0x37, 0x34, 0x7e, 0xb0, 0x84,
0x2a, 0x01, 0x0c, 0x98, 0xed, 0x47, 0xf9, 0x86, 0x81, 0x74, 0x00, 0x5d,
0x8b, 0x4c, 0x18, 0x8a, 0x31, 0xcd, 0xae, 0x07, 0x44, 0xb5, 0xd5, 0x07,
0xa0, 0xdf, 0xf4, 0xfa, 0xa6, 0x42, 0xd0, 0x4f, 0x17, 0xd8, 0xdf, 0xb6,
0x34, 0x44, 0xe3, 0x01, 0xc4, 0xb6, 0x2d, 0xb5, 0x56, 0xc6, 0x2a, 0x1f,
0x05, 0x6c, 0x35, 0xe0, 0x09, 0x31, 0xef, 0x60, 0xfe, 0xaf, 0x07, 0x80,
0x32, 0xa0, 0xe9, 0xd3, 0x96, 0x45, 0xa7, 0xaa, 0xb6, 0xfb, 0x03, 0x10,
0xe3, 0x97, 0x96, 0x8d, 0x3a, 0x01, 0xdd, 0x58, 0x58, 0x78, 0x00, 0xab,
0xff, 0x06, 0xa0, 0xd6, 0x01, 0x58, 0x08, 0xb7, 0xdc, 0x2d, 0xa7, 0xfb,
0x22, 0xa8, 0x67, 0x00, 0xe3, 0xcf, 0x82, 0x43, 0xfc, 0x96, 0x1b, 0x40,
0x63, 0xcf, 0x9d, 0x42, 0x5d, 0x66, 0x40, 0xaa, 0xaf, 0x28, 0x94, 0xd3,
0x2a, 0xd4, 0x02, 0x13, 0xd2, 0xdf, 0x03, 0x9c, 0x60, 0x6b, 0x16, 0x94,
0xb4, 0xbe, 0x62, 0xc2, 0x35, 0x60, 0x45, 0x09, 0x23, 0x5a, 0xe0, 0x85,
0xb3, 0x03, 0x50, 0x68, 0x0c, 0x20, 0xa5, 0xf9, 0x94, 0xd2, 0x35, 0x80,
0xad, 0x4c, 0x4e, 0x40, 0x41, 0x97, 0x92, 0x75, 0xbe, 0x0c, 0x03, 0x50,
0x85, 0x08, 0xaf, 0x36, 0x00, 0x68, 0xaf, 0x09, 0xb3, 0x0c, 0x20, 0x4f,
0x81, 0x6a, 0x6a, 0xf5, 0x0d, 0x70, 0x69, 0x00, 0x4c, 0xb4, 0x0f, 0x59,
0xe7, 0x31, 0x0a, 0x45, 0x9f, 0xde, 0x90, 0xd6, 0x38, 0x80, 0x6b, 0x2c,
0xb9, 0x2f, 0xd4, 0x01, 0x40, 0x14, 0xd5, 0xed, 0x8e, 0x01, 0x53, 0xbf,
0x03, 0x18, 0x1e, 0xb0, 0xc1, 0x85, 0x32, 0xec, 0x78, 0x2b, 0xf0, 0xbb,
0xbb, 0x6c, 0xf3, 0x4d, 0xdc, 0x73, 0x40, 0xfd, 0x10, 0x09, 0x9e, 0x20,
0xe2, 0x12, 0x8c, 0xe0, 0xd2, 0xed, 0x80, 0x6b, 0xcc, 0x78, 0x20, 0x03,
0xd0, 0x5e, 0x06, 0xf4, 0xb0, 0xc4, 0x0e, 0x15, 0x1d, 0x80, 0xb4, 0x76,
0xdf, 0x49, 0x03, 0x50, 0x82, 0xad, 0xda, 0x8b, 0x5a, 0x61, 0xc2, 0x5e,
0xb5, 0x1e, 0x46, 0xc0, 0xde, 0xaa, 0x0e, 0x15, 0x06, 0xd2, 0xf4, 0xb2,
0xd1, 0xed, 0x38, 0x0a, 0x03, 0x18, 0x33, 0x1a, 0x80, 0x61, 0x3e, 0xec,
0x7c, 0x74, 0xa8, 0x1d, 0x80, 0x1a, 0xce, 0x25, 0x1d, 0x41, 0xd1, 0xc1,
0x03, 0x28, 0xb5, 0xaf, 0x72, 0x9c, 0x59, 0x7a, 0xe1, 0x7d, 0xc0, 0xa5,
0x08, 0x1e, 0x18, 0x24, 0xfa, 0xbd, 0x99, 0x4a, 0x31, 0xa0, 0xea, 0xee,
0xf8, 0x36, 0x60, 0x98, 0xc9, 0x10, 0xd1, 0xa7, 0x35, 0x00, 0x8d, 0x40,
0x8e, 0x5a, 0x35, 0x0f, 0x80, 0xb1, 0xd4, 0x32, 0x79, 0x40, 0x34, 0x05,
0x7e, 0x98, 0xc6, 0x80, 0x3e, 0x90, 0x01, 0x65, 0xf4, 0x80, 0x73, 0x08,
0x64, 0xd7, 0x36, 0xc1, 0x7c, 0xc0, 0x5c, 0x75, 0x00, 0xc5, 0x09, 0x58,
0x9c, 0x13, 0x01, 0x72, 0x37, 0x9b, 0x79, 0xe4, 0x05, 0xd1, 0x01, 0x04,
0x98, 0x08, 0x74, 0xfd, 0xfc, 0x3f, 0x1c, 0x00, 0x73, 0x01, 0xfc, 0x1c,
0xcc, 0x16, 0x43, 0x19, 0x1d, 0xac, 0x61, 0x4b, 0x11, 0xc2, 0xa0, 0xf2,
0x01, 0x0b, 0x7b, 0x3b, 0xf4, 0xfc, 0x58, 0x5d, 0x2d, 0x5c, 0x01, 0x8c,
0x62, 0x17, 0x78, 0xbe, 0x60, 0x8c, 0x01, 0x6f, 0x91, 0x49, 0x65, 0x54,
0x92, 0xe9, 0x01, 0x1e, 0x10, 0x77, 0x35, 0x00, 0xa8, 0xd4, 0xc7, 0x71,
0x07, 0xd8, 0xcd, 0xa3, 0x7d, 0x69, 0x20, 0xac, 0x07, 0x00, 0x35, 0xc7,
0x62, 0xee, 0x8c, 0x7d, 0x0c, 0xb8, 0x43, 0x0e, 0x00, 0x08, 0xfb, 0xe7,
0xec, 0x33, 0x37, 0x04, 0x80, 0x2d, 0x1d, 0xa6, 0x13, 0x34, 0x1b, 0x1d,
0xc0, 0xca, 0x00, 0x92, 0xed, 0x2e, 0x56, 0xbe, 0x91, 0x80, 0x0c, 0x88,
0xa6, 0x01, 0xdf, 0x7f, 0x90, 0x49, 0xed, 0x0c, 0xe0, 0x08, 0x73, 0x28,
0x74, 0xc7, 0xe1, 0xb1, 0x03, 0x5d, 0xc5, 0xab, 0x61, 0x42, 0xdf, 0x03,
0x43, 0xf3, 0x35, 0x04, 0xcf, 0xc6, 0x1d, 0x79, 0x07, 0x40, 0x22, 0xe4,
0x68, 0x0d, 0x01, 0x95, 0xad, 0x72, 0x69, 0x00, 0x39, 0x9d, 0x53, 0x8f,
0x13, 0x0d, 0xb0, 0x29, 0x79, 0x1a, 0x39, 0x20, 0x12, 0x28, 0x9b, 0x02,
0x8f, 0x74, 0x90, 0x4c, 0xe8, 0xd1, 0x57, 0xf4, 0x01, 0x44, 0x04, 0xe0,
0x0c, 0x82, 0x91, 0xc5, 0x4f, 0x8f, 0xc6, 0x00, 0x43, 0x85, 0x65, 0xc8,
0xe6, 0x34, 0x1d, 0x80, 0xc0, 0xca, 0xdb, 0x57, 0x6c, 0x00, 0x72, 0x42,
0x5f, 0xd0, 0x49, 0x57, 0x47, 0xd4, 0x97, 0x18, 0x18, 0x80, 0x68, 0x8e,
0x0a, 0xf1, 0x6b, 0x34, 0xf1, 0x60, 0x2c, 0x41, 0x29, 0xd3, 0x3d, 0x55,
0x95, 0xb1, 0x3c, 0xd4, 0x95, 0x42, 0xef, 0xe7, 0xca, 0x00, 0x2e, 0xce,
0x25, 0xc2, 0xca, 0xf5, 0x00, 0x17, 0x3b, 0x8c, 0x42, 0x88, 0x03, 0xde,
0x97, 0xe1, 0x3a, 0x74, 0xb0, 0x33, 0xe0, 0x8f, 0x47, 0xeb, 0x2a, 0x5f,
0x36, 0x3e, 0x5a, 0xff, 0xc5, 0x80, 0xb9, 0x13, 0xa9, 0x1f, 0xf8, 0x86,
0xc9, 0x51, 0xf8, 0x4c, 0xaa, 0xe1, 0x65, 0x80, 0xb0, 0x8b, 0x91, 0xec,
0xcc, 0xbf, 0x70, 0x19, 0x98, 0x03, 0x10, 0xf0, 0x38, 0x40, 0xc4, 0x65,
0xbe, 0x41, 0xb2, 0x58, 0x3f, 0xe0, 0xcc, 0x0e, 0x08, 0x2b, 0x73, 0xf4,
0xdd, 0x86, 0x06, 0xa0, 0xc6, 0x8f, 0x1a, 0x32, 0x66, 0x50, 0x8e, 0xe1,
0x59, 0x67, 0x00, 0xed, 0x66, 0x1d, 0xdd, 0xfa, 0x7b, 0xe2, 0x56, 0x89,
0xd9, 0xa0, 0x4f, 0x41, 0x94, 0x28, 0xb8, 0xc6, 0xc7, 0x64, 0xde, 0x9b,
0x64, 0x44, 0x33, 0x39, 0xb5, 0x6c, 0xb9, 0x42, 0xe7, 0x7e, 0x16, 0xd2,
0x01, 0x12, 0x03, 0xb3, 0x48, 0x47, 0x6b, 0x75, 0x26, 0x19, 0x8c, 0xac,
0x6f, 0xb1, 0x6f, 0xdc, 0x04, 0x27, 0x3a, 0x00, 0xd6, 0xae, 0xfa, 0xe1,
0xf7, 0x30, 0xa4, 0xdb, 0xd5, 0x86, 0x5a, 0x07, 0x11, 0xde, 0xea, 0xf4,
0xb0, 0x83, 0x16, 0xbb, 0xc6, 0x00, 0x6e, 0xf2, 0x6b, 0x40, 0x81, 0x01,
0x67, 0x0e, 0xa9, 0x82, 0x23, 0x04, 0x34, 0xed, 0x02, 0xf5, 0xe4, 0x0e,
0x58, 0xe8, 0x8a, 0x58, 0x57, 0xb0, 0x56, 0x65, 0x3d, 0x40, 0x64, 0x03,
0x6e, 0x7b, 0x07, 0x20, 0x99, 0x90, 0x36, 0x95, 0x9f, 0xdf, 0x3d, 0xe8,
0x00, 0xa0, 0x57, 0x8f, 0x6d, 0xa4, 0xb3, 0x1d, 0x7a, 0x06, 0xa8, 0x26,
0x41, 0xb0, 0x8c, 0x9c, 0x10, 0x85, 0x6c, 0xb4, 0x31, 0xa6, 0x5b, 0x7a,
0x10, 0x51, 0x15, 0x3c, 0xa2, 0x42, 0xd3, 0x23, 0x02, 0xc0, 0x17, 0x7e,
0x03, 0x28, 0xba, 0xce, 0x9b, 0xae, 0xdd, 0x1a, 0x19, 0xd0, 0x15, 0xac,
0xeb, 0x20, 0x3c, 0x3a, 0x00, 0xc6, 0xbb, 0x8a, 0xd5, 0x64, 0xc2, 0x21,
0x1d, 0x6c, 0x15, 0x5a, 0xd3, 0x44, 0x98, 0x14, 0x95, 0xb3, 0xb7, 0xdd,
0xa6, 0xea, 0x06, 0x54, 0x78, 0xc3, 0xe8, 0x79, 0x9b, 0x86, 0x29, 0x76,
0x8b, 0x6b, 0xaa, 0x0d, 0xa8, 0x2f, 0x22, 0x2a, 0xeb, 0x68, 0x81, 0x6c,
0x56, 0xfd, 0x79, 0xac, 0x79, 0x4b, 0xa0, 0x01, 0x3f, 0x17, 0x43, 0x82,
0xb4, 0xd5, 0x00, 0x14, 0xb7, 0xf5, 0x00, 0xf4, 0x15, 0xa8, 0xd7, 0x4b,
0xb1, 0xbc, 0xa8, 0x36, 0x98, 0xf0, 0x8c, 0xe7, 0xf4, 0x7b, 0x35, 0xd8,
0xad, 0x0d, 0x5f, 0x9d, 0x96, 0xab, 0xed, 0x48, 0xe2, 0xdc, 0x1c, 0xbe,
0x12, 0xfa, 0x41, 0x6f, 0xf5, 0x1e, 0xb6, 0x9f, 0xee, 0xac, 0x21, 0xf4,
0xf6, 0x00, 0x38, 0xb1, 0x1f, 0xfd, 0xd0, 0x0e, 0xc7, 0xdd, 0xa0, 0x39,
0x07, 0x8c, 0x35, 0x1f, 0x7e, 0xcc, 0xbf, 0xf6, 0xe0, 0x06, 0x66, 0x7d,
0x10, 0x3f, 0xc5, 0x3e, 0xde, 0x42, 0xf9, 0x3d, 0x00, 0x54, 0x81, 0x67,
0x8a, 0xe6, 0x63, 0x0d, 0x01, 0xd0, 0x31, 0xe0, 0x6e, 0xd0, 0xe1, 0x59,
0xf6, 0x1b, 0xf7, 0x0d, 0x52, 0x06, 0x80, 0x61, 0x4f, 0xe8, 0x77, 0xdd,
0x6f, 0x48, 0x20, 0x1d, 0xbb, 0x2a, 0x16, 0x8b, 0x54, 0x87, 0x92, 0x83,
0xe6, 0x8f, 0x55, 0x59, 0x06, 0x00, 0xe9, 0xc5, 0xce, 0x21, 0x63, 0x87,
0xaf, 0x86, 0xcc, 0xba, 0xd6, 0xe7, 0x00, 0xf6, 0x91, 0x92, 0x92, 0xea,
0xe8, 0x42, 0x06, 0x69, 0x13, 0xf5, 0x00, 0xd0, 0xb0, 0xa7, 0xcb, 0x4c,
0xb0, 0xd2, 0x2d, 0x28, 0x63, 0xf0, 0x6a, 0xc7, 0x80, 0x6a, 0x19, 0xb2,
0x66, 0x51, 0xf3, 0xb1, 0x21, 0xa0, 0x48, 0xad, 0x1e, 0x80, 0x62, 0xaf,
0x00, 0xf4, 0xa5, 0x4e, 0x83, 0x75, 0x1b, 0xfe, 0x00, 0xc4, 0xcf, 0x55,
0xb2, 0x50, 0xa6, 0xeb, 0x38, 0xed, 0x8f, 0xd3, 0x1d, 0x00, 0xf6, 0xe3,
0x90, 0x1c, 0x60, 0x9e, 0x8e, 0xeb, 0x0b, 0xba, 0x44, 0x06, 0x68, 0xbb,
0xd3, 0x10, 0x63, 0x35, 0xe1, 0x86, 0x5c, 0x5c, 0x2b, 0x85, 0xa6, 0xe7,
0x38, 0x2c, 0x18, 0x83, 0x1f, 0x8f, 0x9b, 0x8e, 0x4d, 0x26, 0xcd, 0x34,
0x0c, 0x66, 0x1d, 0x70, 0xb7, 0x01, 0xe6, 0x02, 0xa8, 0x51, 0x63, 0xcf,
0xbb, 0x03, 0xca, 0x85, 0xc6, 0x9c, 0xf6, 0xf1, 0x51, 0xe0, 0x60, 0x07,
0x40, 0x86, 0xf0, 0x1e, 0x6e, 0xef, 0x61, 0x10, 0xd9, 0x36, 0xcc, 0xfc,
0x58, 0xe2, 0x37, 0x0d, 0x58, 0xb7, 0xbe, 0xca, 0xc9, 0xd8, 0xcd, 0xaa,
0xd5, 0x5b, 0x77, 0x83, 0xcb, 0x0e, 0x30, 0xce, 0xc8, 0xb8, 0xcd, 0xbf,
0x1e, 0x63, 0x04, 0xad, 0xb7, 0xcd, 0x43, 0x62, 0x4c, 0xe0, 0x1a, 0xd4,
0x21, 0xe2, 0xdd, 0x33, 0xdf, 0xb1, 0xdd, 0xdc, 0x01, 0x22, 0x18, 0xce,
0xa1, 0xd8, 0xcb, 0x67, 0xd5, 0x38, 0x4a, 0xbc, 0xd5, 0x81, 0x3d, 0x03,
0x98, 0x35, 0x60, 0x41, 0x85, 0x0c, 0x1d, 0xe7, 0x76, 0xf8, 0x11, 0x52,
0x76, 0xf6, 0x06, 0x16, 0x02, 0x45, 0xc8, 0xd8, 0x2f, 0x5e, 0x57, 0xbc,
0x3b, 0x89, 0x97, 0x09, 0x3e, 0x03, 0x34, 0x1a, 0x9d, 0x37, 0x87, 0x48,
0x0a, 0xe0, 0xa7, 0x4f, 0x8c, 0x3a, 0xa2, 0xaf, 0xfd, 0x7b, 0x80, 0xcf,
0xe5, 0x18, 0x61, 0x68, 0xba, 0x61, 0x8b, 0x09, 0xaa, 0xa3, 0x0c, 0x47,
0x3c, 0x43, 0x03, 0xac, 0xa3, 0x2e, 0x5e, 0x72, 0x0c, 0x80, 0x19, 0x61,
0xe6, 0x6e, 0x0e, 0xd9, 0xe8, 0xe8, 0xaf, 0x11, 0x9b, 0x4a, 0x73, 0x7a,
0x61, 0x66, 0xf0, 0x54, 0x1d, 0x18, 0xc8, 0x23, 0x36, 0xbf, 0xb5, 0xf4,
0x86, 0x54, 0xed, 0xb5, 0x91, 0xee, 0xb8, 0xbc, 0xde, 0xc3, 0x87, 0x9b,
0x2f, 0x81, 0xf2, 0xee, 0xa3, 0xec, 0x02
};
/**
* Uncompressed size of \c #srcZstd.
*/
#define DXT1_256x256 32768
/**
* Destination for decoding \c #srcZstd.
*/
static uint8_t dstDxt1[DXT1_256x256] = {};
#ifndef ZSTD_VERSION_MAJOR
/**
* For the case where the decompression library hasn't been included we add a
* dummy function to fake the process and stop the buffers being optimised out.
*/
size_t ZSTD_decompress(void* dst, size_t dstLen, const void* src, size_t srcLen) {
return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? dstLen : 0;
}
#endif
//*************************** Program and Shaders ***************************/
/**
* Program object ID.
*/
static GLuint progId = 0;
/**
* Vertex shader ID.
*/
static GLuint vertId = 0;
/**
* Fragment shader ID.
*/
static GLuint fragId = 0;
//********************************* Uniforms *********************************/
/**
* Quad rotation angle ID.
*/
static GLint uRotId = -1;
/**
* Draw colour ID.
*/
static GLint uTx0Id = -1;
//******************************* Shader Source ******************************/
/**
* Vertex shader to draw texture mapped polys with an applied rotation.
*/
static GLchar const vertShader2D[] =
#if GL_ES_VERSION_2_0
"#version 100\n"
"precision mediump float;\n"
#else
"#version 120\n"
#endif
"uniform float uRot;" // rotation
"attribute vec2 aPos;" // vertex position coords
"attribute vec2 aUV0;" // vertex texture UV0
"varying vec2 vUV0;" // (passed to fragment shader)
"void main() {"
" float cosA = cos(radians(uRot));"
" float sinA = sin(radians(uRot));"
" mat3 rot = mat3(cosA, -sinA, 0.0,"
" sinA, cosA, 0.0,"
" 0.0, 0.0, 1.0);"
" gl_Position = vec4(rot * vec3(aPos, 1.0), 1.0);"
" vUV0 = aUV0;"
"}";
/**
* Fragment shader for the above polys.
*/
static GLchar const fragShader2D[] =
#if GL_ES_VERSION_2_0
"#version 100\n"
"precision mediump float;\n"
#else
"#version 120\n"
#endif
"uniform sampler2D uTx0;"
"varying vec2 vUV0;" // (passed from fragment shader)
"void main() {"
" gl_FragColor = texture2D(uTx0, vUV0);"
"}";
/**
* Helper to compile a shader.
*
* \param type shader type
* \param text shader source
* \return the shader ID (or zero if compilation failed)
*/
static GLuint compileShader(GLenum const type, const GLchar* text) {
GLuint shader = glCreateShader(type);
if (shader) {
glShaderSource (shader, 1, &text, NULL);
glCompileShader(shader);
GLint compiled;
glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
if (compiled) {
return shader;
} else {
GLint logLen;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLen);
if (logLen > 1) {
GLchar* logStr = malloc(logLen);
glGetShaderInfoLog(shader, logLen, NULL, logStr);
#ifndef NDEBUG
printf("Shader compilation error: %s\n", logStr);
#endif
free(logStr);
}
glDeleteShader(shader);
}
}
return 0;
}
//********************************** Helpers *********************************/
/**
* Vertex position index.
*/
#define GL_VERT_POSXY_ID 0
/**
* Vertex UV0 index.
*/
#define GL_VERT_TXUV0_ID 1
/**
* \c GL vec2 storage type.
*/
struct vec2 {
float x;
float y;
};
/**
* Combined 2D vertex and 2D texture coordinates.
*/
struct posTex2d {
struct vec2 pos;
struct vec2 uv0;
};
//****************************************************************************/
/**
* Current quad rotation angle (in degrees, updated per frame).
*/
static float rotDeg = 0.0f;
/**
* Emscripten (single) GL context.
*/
static EMSCRIPTEN_WEBGL_CONTEXT_HANDLE glCtx = 0;
/**
* Emscripten resize handler.
*/
static EM_BOOL resize(int type, const EmscriptenUiEvent* e, void* data) {
double surfaceW;
double surfaceH;
if (emscripten_get_element_css_size ("#canvas", &surfaceW, &surfaceH) == EMSCRIPTEN_RESULT_SUCCESS) {
emscripten_set_canvas_element_size("#canvas", surfaceW, surfaceH);
if (glCtx) {
glViewport(0, 0, (int) surfaceW, (int) surfaceH);
}
}
(void) type;
(void) data;
(void) e;
return EM_FALSE;
}
/**
* Boilerplate to create a WebGL context.
*/
static EM_BOOL initContext() {
// Default attributes
EmscriptenWebGLContextAttributes attr;
emscripten_webgl_init_context_attributes(&attr);
if ((glCtx = emscripten_webgl_create_context("#canvas", &attr))) {
// Bind the context and fire a resize to get the initial size
emscripten_webgl_make_context_current(glCtx);
emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, NULL, EM_FALSE, resize);
resize(0, NULL, NULL);
return EM_TRUE;
}
return EM_FALSE;
}
/**
* Called once per frame (clears the screen and draws the rotating quad).
*/
static void tick() {
glClearColor(1.0f, 0.0f, 1.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (uRotId >= 0) {
glUniform1f(uRotId, rotDeg);
rotDeg += 0.1f;
if (rotDeg >= 360.0f) {
rotDeg -= 360.0f;
}
}
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
glFlush();
}
/**
* Creates the GL context, shaders and quad data, decompresses the Zstd data
* and 'uploads' the resulting texture.
*
* As a (naive) comparison, removing Zstd and building with "-Os -g0 s WASM=1
* -lGL emscripten.c" results in a 15kB WebAssembly file; re-adding Zstd
* increases the Wasm by 26kB.
*/
int main() {
if (initContext()) {
// Compile shaders and set the initial GL state
if ((progId = glCreateProgram())) {
vertId = compileShader(GL_VERTEX_SHADER, vertShader2D);
fragId = compileShader(GL_FRAGMENT_SHADER, fragShader2D);
glBindAttribLocation(progId, GL_VERT_POSXY_ID, "aPos");
glBindAttribLocation(progId, GL_VERT_TXUV0_ID, "aUV0");
glAttachShader(progId, vertId);
glAttachShader(progId, fragId);
glLinkProgram (progId);
glUseProgram (progId);
uRotId = glGetUniformLocation(progId, "uRot");
uTx0Id = glGetUniformLocation(progId, "uTx0");
if (uTx0Id >= 0) {
glUniform1i(uTx0Id, 0);
}
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glDisable(GL_DITHER);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
}
GLuint vertsBuf = 0;
GLuint indexBuf = 0;
GLuint txName = 0;
// Create the textured quad (vert positions then UVs)
struct posTex2d verts2d[] = {
{{-0.85f, -0.85f}, {0.0f, 0.0f}}, // BL
{{ 0.85f, -0.85f}, {1.0f, 0.0f}}, // BR
{{-0.85f, 0.85f}, {0.0f, 1.0f}}, // TL
{{ 0.85f, 0.85f}, {1.0f, 1.0f}}, // TR
};
uint16_t index2d[] = {
0, 1, 2,
2, 1, 3,
};
glGenBuffers(1, &vertsBuf);
glBindBuffer(GL_ARRAY_BUFFER, vertsBuf);
glBufferData(GL_ARRAY_BUFFER,
sizeof(verts2d), verts2d, GL_STATIC_DRAW);
glVertexAttribPointer(GL_VERT_POSXY_ID, 2,
GL_FLOAT, GL_FALSE, sizeof(struct posTex2d), 0);
glVertexAttribPointer(GL_VERT_TXUV0_ID, 2,
GL_FLOAT, GL_FALSE, sizeof(struct posTex2d),
(void*) offsetof(struct posTex2d, uv0));
glGenBuffers(1, &indexBuf);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuf);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
sizeof(index2d), index2d, GL_STATIC_DRAW);
glEnableVertexAttribArray(GL_VERT_POSXY_ID);
glEnableVertexAttribArray(GL_VERT_TXUV0_ID);
// Decode the Zstd data and create the texture
if (ZSTD_decompress(dstDxt1, DXT1_256x256, srcZstd, sizeof srcZstd) == DXT1_256x256) {
glGenTextures(1, &txName);
glBindTexture(GL_TEXTURE_2D, txName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glCompressedTexImage2D(GL_TEXTURE_2D, 0,
GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
256, 256, 0, DXT1_256x256, dstDxt1);
} else {
printf("Failed to decode Zstd data\n");
}
emscripten_set_main_loop(tick, 0, EM_FALSE);
emscripten_exit_with_live_runtime();
}
return EXIT_FAILURE;
}

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contrib/single_file_decoder/examples/simple.c
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72
contrib/single_file_decoder/zstddeclib-in.c
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@ -1,72 +0,0 @@
/**
* \file zstddeclib.c
* Single-file Zstandard decompressor.
*
* Generate using:
* \code
* combine.sh -r ../../lib -r ../../lib/common -r ../../lib/decompress -o zstddeclib.c zstddeclib-in.c
* \endcode
*/
/*
* BSD License
*
* For Zstandard software
*
* Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name Facebook nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Settings to bake for the standalone decompressor.
*
* Note: It's important that none of these affects 'zstd.h' (only the
* implementation files we're amalgamating).
*
* Note: MEM_MODULE stops xxhash redefining BYTE, U16, etc., which are also
* defined in mem.h (breaking C99 compatibility).
*/
#define DEBUGLEVEL 0
#define MEM_MODULE
#define XXH_NAMESPACE ZSTD_
#define XXH_PRIVATE_API
#define XXH_INLINE_ALL
#define ZSTD_LEGACY_SUPPORT 0
#define ZSTD_LIB_COMPRESSION 0
#define ZSTD_LIB_DEPRECATED 0
#define ZSTD_NOBENCH
#define ZSTD_STRIP_ERROR_STRINGS
#include "debug.c"
#include "entropy_common.c"
#include "error_private.c"
#include "fse_decompress.c"
#include "xxhash.c"
#include "zstd_common.c"
#include "huf_decompress.c"
#include "zstd_ddict.c"
#include "zstd_decompress.c"
#include "zstd_decompress_block.c"

4
contrib/single_file_libs/.gitignore vendored Normal file
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@ -0,0 +1,4 @@
zstddeclib.c
zstdenclib.c
zstd.c
zstd.h

33
contrib/single_file_libs/README.md Normal file
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@ -0,0 +1,33 @@
# Single File Zstandard Libraries
The script `combine.sh` creates an _amalgamated_ source file that can be used with or without `zstd.h`. This isn't a _header-only_ file but it does offer a similar level of simplicity when integrating into a project.
All it now takes to support Zstd in your own projects is the addition of a single file, two if using the header, with no configuration or further build steps.
Decompressor
------------
This is the most common use case. The decompression library is small, adding, for example, 26kB to an Emscripten compiled WebAssembly project. Native implementations add a little more, 40-70kB depending on the compiler and platform.
Create `zstddeclib.c` from the Zstd source using:
```
cd zstd/contrib/single_file_libs
./combine.sh -r ../../lib -r ../../lib/common -r ../../lib/decompress -o zstddeclib.c zstddeclib-in.c
```
Then add the resulting file to your project (see the [example files](examples)).
`create_single_file_decoder.sh` will run the above script, creating the file `zstddeclib.c` (`build_decoder_test.sh` will also create `zstddeclib.c`, then compile and test the result).
Full Library
------------
The same tool can amalgamate the entire Zstd library for ease of adding both compression and decompression to a project. The [roundtrip example](examples/roundtrip.c) uses the original `zstd.h` with the remaining source files combined into `zstd.c` (currently just over 1MB) created from `zstd-in.c`. As with the standalone decoder the most useful compile flags have already been rolled-in and the resulting file can be added to a project as-is.
Create `zstd.c` from the Zstd source using:
```
cd zstd/contrib/single_file_libs
combine.sh -r ../../lib -r ../../lib/common -r ../../lib/compress -r ../../lib/decompress -k zstd.h -o zstd.c zstd-in.c
```
It's possible to create a compressor-only library but since the decompressor is so small in comparison this doesn't bring much of a gain (but for the curious, simply remove the files in the _decompress_ section at the end of `zstd-in.c`).
`create_single_file_library.sh` will run the script to create `zstd.c` (`build_library_test.sh` will also create `zstd.c`, then compile and test the result).

3
contrib/single_file_decoder/build_test.sh → contrib/single_file_libs/build_decoder_test.sh
View File

@ -1,8 +1,5 @@
#!/bin/sh
# Where to find the sources
ZSTD_SRC_ROOT="../../lib"
# Temporary compiled binary
OUT_FILE="tempbin"

61
contrib/single_file_libs/build_library_test.sh Executable file
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@ -0,0 +1,61 @@
#!/bin/sh
# Where to find the sources (only used to copy zstd.h)
ZSTD_SRC_ROOT="../../lib"
# Temporary compiled binary
OUT_FILE="tempbin"
# Optional temporary compiled WebAssembly
OUT_WASM="temp.wasm"
# Amalgamate the sources
./create_single_file_library.sh
# Did combining work?
if [ $? -ne 0 ]; then
echo "Single file library creation script: FAILED"
exit 1
fi
echo "Single file library creation script: PASSED"
# Copy the header to here (for the tests)
cp "$ZSTD_SRC_ROOT/zstd.h" zstd.h
# Compile the generated output
cc -Wall -Wextra -Werror -pthread -I. -Os -g0 -o $OUT_FILE zstd.c examples/roundtrip.c
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling roundtrip.c: FAILED"
exit 1
fi
echo "Compiling roundtrip.c: PASSED"
# Run then delete the compiled output
./$OUT_FILE
retVal=$?
rm -f $OUT_FILE
# Did the test work?
if [ $retVal -ne 0 ]; then
echo "Running roundtrip.c: FAILED"
exit 1
fi
echo "Running roundtrip.c: PASSED"
# Is Emscripten available?
which emcc > /dev/null
if [ $? -ne 0 ]; then
echo "(Skipping Emscripten test)"
else
# Compile the the same example as above
CC_FLAGS="-Wall -Wextra -Werror -Os -g0 -flto"
emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM zstd.c examples/roundtrip.c
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling emscripten.c: FAILED"
exit 1
fi
echo "Compiling emscripten.c: PASSED"
rm -f $OUT_WASM
fi
exit 0

166
contrib/single_file_libs/combine.sh Executable file
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@ -0,0 +1,166 @@
#!/bin/sh -e
# Tool to bundle multiple C/C++ source files, inlining any includes.
#
# Note: this POSIX-compliant script is many times slower than the original bash
# implementation (due to the grep calls) but it runs and works everywhere.
#
# TODO: ROOTS, FOUND, etc., as arrays (since they fail on paths with spaces)
# TODO: revert to Bash-only regex (the grep ones being too slow)
#
# Author: Carl Woffenden, Numfum GmbH (this script is released under a CC0 license/Public Domain)
# Common file roots
ROOTS="."
# -x option excluded includes
XINCS=""
# -k option includes to keep as include directives
KINCS=""
# Files previously visited
FOUND=""
# Optional destination file (empty string to write to stdout)
DESTN=""
# Whether the "#pragma once" directives should be written to the output
PONCE=0
# Prints the script usage then exits
usage() {
echo "Usage: $0 [-r <path>] [-x <header>] [-k <header>] [-o <outfile>] infile"
echo " -r file root search path"
echo " -x file to completely exclude from inlining"
echo " -k file to exclude from inlining but keep the include directive"
echo " -p keep any '#pragma once' directives (removed by default)"
echo " -o output file (otherwise stdout)"
echo "Example: $0 -r ../my/path - r ../other/path -o out.c in.c"
exit 1
}
# Tests that the grep implementation works as expected (older OSX grep fails)
test_grep() {
if ! echo '#include "foo"' | grep -Eq '^\s*#\s*include\s*".+"'; then
echo "Aborting: the grep implementation fails to parse include lines"
exit 1
fi
}
# Tests if list $1 has item $2 (returning zero on a match)
list_has_item() {
if echo "$1" | grep -Eq "(^|\s*)$2(\$|\s*)"; then
return 0
else
return 1
fi
}
# Adds a new line with the supplied arguments to $DESTN (or stdout)
write_line() {
if [ -n "$DESTN" ]; then
printf '%s\n' "$@" >> "$DESTN"
else
printf '%s\n' "$@"
fi
}
# Adds the contents of $1 with any of its includes inlined
add_file() {
# Match the path
local file=
for root in $ROOTS; do
if [ -f "$root/$1" ]; then
file="$root/$1"
fi
done
if [ -n "$file" ]; then
if [ -n "$DESTN" ]; then
# Log but only if not writing to stdout
echo "Processing: $file"
fi
# Read the file
local line=
while IFS= read -r line; do
if echo "$line" | grep -Eq '^\s*#\s*include\s*".+"'; then
# We have an include directive so strip the (first) file
local inc=$(echo "$line" | grep -Eo '".*"' | grep -Eo '\w*(\.?\w+)+' | head -1)
if list_has_item "$XINCS" "$inc"; then
# The file was excluded so error if the source attempts to use it
write_line "#error Using excluded file: $inc"
else
if ! list_has_item "$FOUND" "$inc"; then
# The file was not previously encountered
FOUND="$FOUND $inc"
if list_has_item "$KINCS" "$inc"; then
# But the include was flagged to keep as included
write_line "/**** *NOT* inlining $inc ****/"
write_line "$line"
else
# The file was neither excluded nor seen before so inline it
write_line "/**** start inlining $inc ****/"
add_file "$inc"
write_line "/**** ended inlining $inc ****/"
fi
else
write_line "/**** skipping file: $inc ****/"
fi
fi
else
# Skip any 'pragma once' directives, otherwise write the source line
local write=$PONCE
if [ $write -eq 0 ]; then
if echo "$line" | grep -Eqv '^\s*#\s*pragma\s*once\s*'; then
write=1
fi
fi
if [ $write -ne 0 ]; then
write_line "$line"
fi
fi
done < "$file"
else
write_line "#error Unable to find \"$1\""
fi
}
while getopts ":r:x:k:po:" opts; do
case $opts in
r)
ROOTS="$ROOTS $OPTARG"
;;
x)
XINCS="$XINCS $OPTARG"
;;
k)
KINCS="$KINCS $OPTARG"
;;
p)
PONCE=1
;;
o)
DESTN="$OPTARG"
;;
*)
usage
;;
esac
done
shift $((OPTIND-1))
if [ -n "$1" ]; then
if [ -f "$1" ]; then
if [ -n "$DESTN" ]; then
printf "" > "$DESTN"
fi
test_grep
add_file $1
else
echo "Input file not found: \"$1\""
exit 1
fi
else
usage
fi
exit 0

1
contrib/single_file_decoder/create_single_file_decoder.sh → contrib/single_file_libs/create_single_file_decoder.sh
View File

@ -3,7 +3,6 @@
# Where to find the sources
ZSTD_SRC_ROOT="../../lib"
# Amalgamate the sources
echo "Amalgamating files... this can take a while"
./combine.sh -r "$ZSTD_SRC_ROOT" -r "$ZSTD_SRC_ROOT/common" -r "$ZSTD_SRC_ROOT/decompress" -o zstddeclib.c zstddeclib-in.c

14
contrib/single_file_libs/create_single_file_library.sh Executable file
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@ -0,0 +1,14 @@
#!/bin/sh
# Where to find the sources
ZSTD_SRC_ROOT="../../lib"
# Amalgamate the sources
echo "Amalgamating files... this can take a while"
./combine.sh -r "$ZSTD_SRC_ROOT" -r "$ZSTD_SRC_ROOT/common" -r "$ZSTD_SRC_ROOT/compress" -r "$ZSTD_SRC_ROOT/decompress" -k zstd.h -o zstd.c zstd-in.c
# Did combining work?
if [ $? -ne 0 ]; then
echo "Combine script: FAILED"
exit 1
fi
echo "Combine script: PASSED"

4
contrib/single_file_decoder/examples/README.md → contrib/single_file_libs/examples/README.md
View File

@ -6,4 +6,6 @@ The examples `#include` the generated `zstddeclib.c` directly but work equally a
`emscripten.c` is a bare-bones [Emscripten](https://github.com/emscripten-core/emscripten) compiled WebGL demo using Zstd to further compress a DXT1 texture (see the [original PNG image](testcard.png)). The 256x256 texture would normally be 32kB, but even when bundled with the Zstd decompressor the resulting WebAssembly weighs in at 41kB (`shell.html` is a support file to run the Wasm).
The example files in this directory are released under a [Creative Commons Zero license](https://creativecommons.org/publicdomain/zero/1.0/).
`roundtrip.c` is an example to use with the optional [amalgamated library](../create_single_file_library.sh) showing compression the decompression.
The example files in this directory are released under a [Creative Commons Zero license](https://creativecommons.org/publicdomain/zero/1.0/) (or Public Domain, whichever is applicable in your jurisdiction).

340
contrib/single_file_libs/examples/emscripten.c Normal file
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@ -0,0 +1,340 @@
/**
* \file emscripten.c
* Emscripten example of using the single-file \c zstddeclib. Draws a rotating
* textured quad with data from the in-line Zstd compressed DXT1 texture (DXT1
* being hardware compression, further compressed with Zstd).
* \n
* Compile using:
* \code
* export CC_FLAGS="-Wall -Wextra -Werror -Os -g0 -flto --llvm-lto 3 -lGL -DNDEBUG=1"
* export EM_FLAGS="-s WASM=1 -s ENVIRONMENT=web --shell-file shell.html --closure 1"
* emcc $CC_FLAGS $EM_FLAGS -o out.html emscripten.c
* \endcode
*
* \author Carl Woffenden, Numfum GmbH (released under a CC0 license)
*/
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <emscripten/emscripten.h>
#include <emscripten/html5.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "../zstddeclib.c"
//************************* Test Data (DXT texture) **************************/
/**
* Zstd compressed DXT1 256x256 texture source.
* \n
* See \c testcard.png for the original.
*/
static uint8_t const srcZstd[] = {
#include "testcard-zstd.inl"
};
/**
* Uncompressed size of \c #srcZstd.
*/
#define DXT1_256x256 32768
/**
* Destination for decoding \c #srcZstd.
*/
static uint8_t dstDxt1[DXT1_256x256] = {};
#ifndef ZSTD_VERSION_MAJOR
/**
* For the case where the decompression library hasn't been included we add a
* dummy function to fake the process and stop the buffers being optimised out.
*/
size_t ZSTD_decompress(void* dst, size_t dstLen, const void* src, size_t srcLen) {
return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? dstLen : 0;
}
#endif
//*************************** Program and Shaders ***************************/
/**
* Program object ID.
*/
static GLuint progId = 0;
/**
* Vertex shader ID.
*/
static GLuint vertId = 0;
/**
* Fragment shader ID.
*/
static GLuint fragId = 0;
//********************************* Uniforms *********************************/
/**
* Quad rotation angle ID.
*/
static GLint uRotId = -1;
/**
* Draw colour ID.
*/
static GLint uTx0Id = -1;
//******************************* Shader Source ******************************/
/**
* Vertex shader to draw texture mapped polys with an applied rotation.
*/
static GLchar const vertShader2D[] =
#if GL_ES_VERSION_2_0
"#version 100\n"
"precision mediump float;\n"
#else
"#version 120\n"
#endif
"uniform float uRot;" // rotation
"attribute vec2 aPos;" // vertex position coords
"attribute vec2 aUV0;" // vertex texture UV0
"varying vec2 vUV0;" // (passed to fragment shader)
"void main() {"
" float cosA = cos(radians(uRot));"
" float sinA = sin(radians(uRot));"
" mat3 rot = mat3(cosA, -sinA, 0.0,"
" sinA, cosA, 0.0,"
" 0.0, 0.0, 1.0);"
" gl_Position = vec4(rot * vec3(aPos, 1.0), 1.0);"
" vUV0 = aUV0;"
"}";
/**
* Fragment shader for the above polys.
*/
static GLchar const fragShader2D[] =
#if GL_ES_VERSION_2_0
"#version 100\n"
"precision mediump float;\n"
#else
"#version 120\n"
#endif
"uniform sampler2D uTx0;"
"varying vec2 vUV0;" // (passed from fragment shader)
"void main() {"
" gl_FragColor = texture2D(uTx0, vUV0);"
"}";
/**
* Helper to compile a shader.
*
* \param type shader type
* \param text shader source
* \return the shader ID (or zero if compilation failed)
*/
static GLuint compileShader(GLenum const type, const GLchar* text) {
GLuint shader = glCreateShader(type);
if (shader) {
glShaderSource (shader, 1, &text, NULL);
glCompileShader(shader);
GLint compiled;
glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
if (compiled) {
return shader;
} else {
GLint logLen;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLen);
if (logLen > 1) {
GLchar* logStr = malloc(logLen);
glGetShaderInfoLog(shader, logLen, NULL, logStr);
#ifndef NDEBUG
printf("Shader compilation error: %s\n", logStr);
#endif
free(logStr);
}
glDeleteShader(shader);
}
}
return 0;
}
//********************************** Helpers *********************************/
/**
* Vertex position index.
*/
#define GL_VERT_POSXY_ID 0
/**
* Vertex UV0 index.
*/
#define GL_VERT_TXUV0_ID 1
/**
* \c GL vec2 storage type.
*/
struct vec2 {
float x;
float y;
};
/**
* Combined 2D vertex and 2D texture coordinates.
*/
struct posTex2d {
struct vec2 pos;
struct vec2 uv0;
};
//****************************************************************************/
/**
* Current quad rotation angle (in degrees, updated per frame).
*/
static float rotDeg = 0.0f;
/**
* Emscripten (single) GL context.
*/
static EMSCRIPTEN_WEBGL_CONTEXT_HANDLE glCtx = 0;
/**
* Emscripten resize handler.
*/
static EM_BOOL resize(int type, const EmscriptenUiEvent* e, void* data) {
double surfaceW;
double surfaceH;
if (emscripten_get_element_css_size ("#canvas", &surfaceW, &surfaceH) == EMSCRIPTEN_RESULT_SUCCESS) {
emscripten_set_canvas_element_size("#canvas", surfaceW, surfaceH);
if (glCtx) {
glViewport(0, 0, (int) surfaceW, (int) surfaceH);
}
}
(void) type;
(void) data;
(void) e;
return EM_FALSE;
}
/**
* Boilerplate to create a WebGL context.
*/
static EM_BOOL initContext() {
// Default attributes
EmscriptenWebGLContextAttributes attr;
emscripten_webgl_init_context_attributes(&attr);
if ((glCtx = emscripten_webgl_create_context("#canvas", &attr))) {
// Bind the context and fire a resize to get the initial size
emscripten_webgl_make_context_current(glCtx);
emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, NULL, EM_FALSE, resize);
resize(0, NULL, NULL);
return EM_TRUE;
}
return EM_FALSE;
}
/**
* Called once per frame (clears the screen and draws the rotating quad).
*/
static void tick() {
glClearColor(1.0f, 0.0f, 1.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (uRotId >= 0) {
glUniform1f(uRotId, rotDeg);
rotDeg += 0.1f;
if (rotDeg >= 360.0f) {
rotDeg -= 360.0f;
}
}
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
glFlush();
}
/**
* Creates the GL context, shaders and quad data, decompresses the Zstd data
* and 'uploads' the resulting texture.
*
* As a (naive) comparison, removing Zstd and building with "-Os -g0 s WASM=1
* -lGL emscripten.c" results in a 15kB WebAssembly file; re-adding Zstd
* increases the Wasm by 26kB.
*/
int main() {
if (initContext()) {
// Compile shaders and set the initial GL state
if ((progId = glCreateProgram())) {
vertId = compileShader(GL_VERTEX_SHADER, vertShader2D);
fragId = compileShader(GL_FRAGMENT_SHADER, fragShader2D);
glBindAttribLocation(progId, GL_VERT_POSXY_ID, "aPos");
glBindAttribLocation(progId, GL_VERT_TXUV0_ID, "aUV0");
glAttachShader(progId, vertId);
glAttachShader(progId, fragId);
glLinkProgram (progId);
glUseProgram (progId);
uRotId = glGetUniformLocation(progId, "uRot");
uTx0Id = glGetUniformLocation(progId, "uTx0");
if (uTx0Id >= 0) {
glUniform1i(uTx0Id, 0);
}
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glDisable(GL_DITHER);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
}
GLuint vertsBuf = 0;
GLuint indexBuf = 0;
GLuint txName = 0;
// Create the textured quad (vert positions then UVs)
struct posTex2d verts2d[] = {
{{-0.85f, -0.85f}, {0.0f, 0.0f}}, // BL
{{ 0.85f, -0.85f}, {1.0f, 0.0f}}, // BR
{{-0.85f, 0.85f}, {0.0f, 1.0f}}, // TL
{{ 0.85f, 0.85f}, {1.0f, 1.0f}}, // TR
};
uint16_t index2d[] = {
0, 1, 2,
2, 1, 3,
};
glGenBuffers(1, &vertsBuf);
glBindBuffer(GL_ARRAY_BUFFER, vertsBuf);
glBufferData(GL_ARRAY_BUFFER,
sizeof(verts2d), verts2d, GL_STATIC_DRAW);
glVertexAttribPointer(GL_VERT_POSXY_ID, 2,
GL_FLOAT, GL_FALSE, sizeof(struct posTex2d), 0);
glVertexAttribPointer(GL_VERT_TXUV0_ID, 2,
GL_FLOAT, GL_FALSE, sizeof(struct posTex2d),
(void*) offsetof(struct posTex2d, uv0));
glGenBuffers(1, &indexBuf);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuf);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
sizeof(index2d), index2d, GL_STATIC_DRAW);
glEnableVertexAttribArray(GL_VERT_POSXY_ID);
glEnableVertexAttribArray(GL_VERT_TXUV0_ID);
// Decode the Zstd data and create the texture
if (ZSTD_decompress(dstDxt1, DXT1_256x256, srcZstd, sizeof srcZstd) == DXT1_256x256) {
glGenTextures(1, &txName);
glBindTexture(GL_TEXTURE_2D, txName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glCompressedTexImage2D(GL_TEXTURE_2D, 0,
GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
256, 256, 0, DXT1_256x256, dstDxt1);
} else {
printf("Failed to decode Zstd data\n");
}
emscripten_set_main_loop(tick, 0, EM_FALSE);
emscripten_exit_with_live_runtime();
}
return EXIT_FAILURE;
}

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/*
* \file roundtrip.c
* In this example we include \c zstd.h and compile separately the amalgamated
* \c zstd.c:
* \code
* cc -Wall -Wextra -Werror -I. -Os -g0 zstd.c examples/roundtrip.c
* \endcode
*
* \author Carl Woffenden, Numfum GmbH (released under a CC0 license)
*/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zstd.h"
//************************** Test Data (DXT texture) **************************/
/**
* Raw test data (borrowed from the Emscripten example).
* \n
* See \c testcard.png for the original.
*/
static uint8_t const rawData[] = {
#include "testcard-dxt1.inl"
};
#ifndef ZSTD_VERSION_MAJOR
/*
* For the case where the decompression library hasn't been included we add
* dummy functions to fake the process and stop the buffers being optimised out.
*/
size_t ZSTD_compressBound(size_t maxSrc) {
return maxSrc + 32;
}
int ZSTD_maxCLevel(void) {
return 20;
}
size_t ZSTD_compress(void* dst, size_t dstLen, const void* src, size_t srcLen, int level) {
return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? level : dstLen;
}
unsigned ZSTD_isError(size_t code) {
return ((int) code) < 0;
}
size_t ZSTD_decompress(void* dst, size_t dstLen, const void* src, size_t srcLen) {
return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? 0 : dstLen;
}
#endif
//*****************************************************************************/
/**
* Simple single-file test to compress \c rawData, decompress the result, then
* compare the decompressed version with the original.
*/
int main() {
size_t bounds = ZSTD_compressBound(sizeof rawData);
void* compBuf = malloc(bounds);
void* testBuf = malloc(sizeof rawData);
int compare = -1;
if (compBuf && testBuf) {
size_t compSize = ZSTD_compress(compBuf, bounds, rawData, sizeof rawData, ZSTD_maxCLevel());
if (!ZSTD_isError(compSize)) {
printf("Compression: PASSED (size: %lu, uncompressed: %lu)\n", (unsigned long) compSize, (unsigned long) (sizeof rawData));
size_t decSize = ZSTD_decompress(testBuf, sizeof rawData, compBuf, compSize);
if (!ZSTD_isError(decSize)) {
printf("Decompression: PASSED\n");
compare = memcmp(rawData, testBuf, decSize);
printf("Byte comparison: %s\n", (compare == 0) ? "PASSED" : "FAILED");
} else {
printf("Decompression: FAILED\n");
}
} else {
printf("Compression: FAILED\n");
}
free(compBuf);
free(testBuf);
}
return (compare == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}

0
contrib/single_file_decoder/examples/shell.html → contrib/single_file_libs/examples/shell.html
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75
contrib/single_file_libs/examples/simple.c Normal file
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/**
* \file simple.c
* Simple standalone example of using the single-file \c zstddeclib.
*
* \note In this simple example we include the amalgamated source and compile
* just this single file, but we could equally (and more conventionally)
* include \c zstd.h and compile both this file and \c zstddeclib.c (the
* resulting binaries differ slightly in size but perform the same).
*
* \author Carl Woffenden, Numfum GmbH (released under a CC0 license)
*/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../zstddeclib.c"
//************************* Test Data (DXT texture) **************************/
/**
* Raw 256x256 DXT1 data (used to compare the result).
* \n
* See \c testcard.png for the original.
*/
static uint8_t const rawDxt1[] = {
#include "testcard-dxt1.inl"
};
/**
* Zstd compressed version of \c #rawDxt1.
* \n
* See \c testcard.png for the original.
*/
static uint8_t const srcZstd[] = {
#include "testcard-zstd.inl"
};
/**
* Destination for decoding \c #srcZstd.
*/
static uint8_t dstDxt1[sizeof rawDxt1] = {};
#ifndef ZSTD_VERSION_MAJOR
/**
* For the case where the decompression library hasn't been included we add a
* dummy function to fake the process and stop the buffers being optimised out.
*/
size_t ZSTD_decompress(void* dst, size_t dstLen, const void* src, size_t srcLen) {
return (memcmp(dst, src, (srcLen < dstLen) ? srcLen : dstLen)) ? 0 : dstLen;
}
#endif
//****************************************************************************/
/**
* Simple single-file test to decompress \c #srcZstd into \c # dstDxt1 then
* compare the resulting bytes with \c #rawDxt1.
* \n
* As a (naive) comparison, removing Zstd and building with "-Os -g0 simple.c"
* results in a 44kB binary (macOS 10.14, Clang 10); re-adding Zstd increases
* the binary by 56kB (after calling \c strip).
*/
int main() {
size_t size = ZSTD_decompress(dstDxt1, sizeof dstDxt1, srcZstd, sizeof srcZstd);
int compare = memcmp(rawDxt1, dstDxt1, sizeof dstDxt1);
printf("Decompressed size: %s\n", (size == sizeof dstDxt1) ? "PASSED" : "FAILED");
printf("Byte comparison: %s\n", (compare == 0) ? "PASSED" : "FAILED");
if (size == sizeof dstDxt1 && compare == 0) {
return EXIT_SUCCESS;
}
return EXIT_FAILURE;
}

2731
contrib/single_file_libs/examples/testcard-dxt1.inl Normal file
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261
contrib/single_file_libs/examples/testcard-zstd.inl Normal file
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@ -0,0 +1,261 @@
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0x07, 0x8c, 0x35, 0x1f, 0x7e, 0xcc, 0xbf, 0xf6, 0xe0, 0x06, 0x66, 0x7d,
0x10, 0x3f, 0xc5, 0x3e, 0xde, 0x42, 0xf9, 0x3d, 0x00, 0x54, 0x81, 0x67,
0x8a, 0xe6, 0x63, 0x0d, 0x01, 0xd0, 0x31, 0xe0, 0x6e, 0xd0, 0xe1, 0x59,
0xf6, 0x1b, 0xf7, 0x0d, 0x52, 0x06, 0x80, 0x61, 0x4f, 0xe8, 0x77, 0xdd,
0x6f, 0x48, 0x20, 0x1d, 0xbb, 0x2a, 0x16, 0x8b, 0x54, 0x87, 0x92, 0x83,
0xe6, 0x8f, 0x55, 0x59, 0x06, 0x00, 0xe9, 0xc5, 0xce, 0x21, 0x63, 0x87,
0xaf, 0x86, 0xcc, 0xba, 0xd6, 0xe7, 0x00, 0xf6, 0x91, 0x92, 0x92, 0xea,
0xe8, 0x42, 0x06, 0x69, 0x13, 0xf5, 0x00, 0xd0, 0xb0, 0xa7, 0xcb, 0x4c,
0xb0, 0xd2, 0x2d, 0x28, 0x63, 0xf0, 0x6a, 0xc7, 0x80, 0x6a, 0x19, 0xb2,
0x66, 0x51, 0xf3, 0xb1, 0x21, 0xa0, 0x48, 0xad, 0x1e, 0x80, 0x62, 0xaf,
0x00, 0xf4, 0xa5, 0x4e, 0x83, 0x75, 0x1b, 0xfe, 0x00, 0xc4, 0xcf, 0x55,
0xb2, 0x50, 0xa6, 0xeb, 0x38, 0xed, 0x8f, 0xd3, 0x1d, 0x00, 0xf6, 0xe3,
0x90, 0x1c, 0x60, 0x9e, 0x8e, 0xeb, 0x0b, 0xba, 0x44, 0x06, 0x68, 0xbb,
0xd3, 0x10, 0x63, 0x35, 0xe1, 0x86, 0x5c, 0x5c, 0x2b, 0x85, 0xa6, 0xe7,
0x38, 0x2c, 0x18, 0x83, 0x1f, 0x8f, 0x9b, 0x8e, 0x4d, 0x26, 0xcd, 0x34,
0x0c, 0x66, 0x1d, 0x70, 0xb7, 0x01, 0xe6, 0x02, 0xa8, 0x51, 0x63, 0xcf,
0xbb, 0x03, 0xca, 0x85, 0xc6, 0x9c, 0xf6, 0xf1, 0x51, 0xe0, 0x60, 0x07,
0x40, 0x86, 0xf0, 0x1e, 0x6e, 0xef, 0x61, 0x10, 0xd9, 0x36, 0xcc, 0xfc,
0x58, 0xe2, 0x37, 0x0d, 0x58, 0xb7, 0xbe, 0xca, 0xc9, 0xd8, 0xcd, 0xaa,
0xd5, 0x5b, 0x77, 0x83, 0xcb, 0x0e, 0x30, 0xce, 0xc8, 0xb8, 0xcd, 0xbf,
0x1e, 0x63, 0x04, 0xad, 0xb7, 0xcd, 0x43, 0x62, 0x4c, 0xe0, 0x1a, 0xd4,
0x21, 0xe2, 0xdd, 0x33, 0xdf, 0xb1, 0xdd, 0xdc, 0x01, 0x22, 0x18, 0xce,
0xa1, 0xd8, 0xcb, 0x67, 0xd5, 0x38, 0x4a, 0xbc, 0xd5, 0x81, 0x3d, 0x03,
0x98, 0x35, 0x60, 0x41, 0x85, 0x0c, 0x1d, 0xe7, 0x76, 0xf8, 0x11, 0x52,
0x76, 0xf6, 0x06, 0x16, 0x02, 0x45, 0xc8, 0xd8, 0x2f, 0x5e, 0x57, 0xbc,
0x3b, 0x89, 0x97, 0x09, 0x3e, 0x03, 0x34, 0x1a, 0x9d, 0x37, 0x87, 0x48,
0x0a, 0xe0, 0xa7, 0x4f, 0x8c, 0x3a, 0xa2, 0xaf, 0xfd, 0x7b, 0x80, 0xcf,
0xe5, 0x18, 0x61, 0x68, 0xba, 0x61, 0x8b, 0x09, 0xaa, 0xa3, 0x0c, 0x47,
0x3c, 0x43, 0x03, 0xac, 0xa3, 0x2e, 0x5e, 0x72, 0x0c, 0x80, 0x19, 0x61,
0xe6, 0x6e, 0x0e, 0xd9, 0xe8, 0xe8, 0xaf, 0x11, 0x9b, 0x4a, 0x73, 0x7a,
0x61, 0x66, 0xf0, 0x54, 0x1d, 0x18, 0xc8, 0x23, 0x36, 0xbf, 0xb5, 0xf4,
0x86, 0x54, 0xed, 0xb5, 0x91, 0xee, 0xb8, 0xbc, 0xde, 0xc3, 0x87, 0x9b,
0x2f, 0x81, 0xf2, 0xee, 0xa3, 0xec, 0x02

0
contrib/single_file_decoder/examples/testcard.png → contrib/single_file_libs/examples/testcard.png
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79
contrib/single_file_libs/zstd-in.c Normal file
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@ -0,0 +1,79 @@
/**
* \file zstd.c
* Single-file Zstandard library.
*
* Generate using:
* \code
* combine.sh -r ../../lib -r ../../lib/common -r ../../lib/compress -r ../../lib/decompress -k zstd.h -o zstd.c zstd-in.c
* \endcode
*/
/*
* Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
/*
* Settings to bake for the single library file.
*
* Note: It's important that none of these affects 'zstd.h' (only the
* implementation files we're amalgamating).
*
* Note: MEM_MODULE stops xxhash redefining BYTE, U16, etc., which are also
* defined in mem.h (breaking C99 compatibility).
*
* Note: the undefs for xxHash allow Zstd's implementation to coinside with with
* standalone xxHash usage (with global defines).
*
* Note: multithreading is enabled for all platforms apart from Emscripten.
*/
#define DEBUGLEVEL 0
#define MEM_MODULE
#undef XXH_NAMESPACE
#define XXH_NAMESPACE ZSTD_
#undef XXH_PRIVATE_API
#define XXH_PRIVATE_API
#undef XXH_INLINE_ALL
#define XXH_INLINE_ALL
#define ZSTD_LEGACY_SUPPORT 0
#define ZSTD_LIB_DICTBUILDER 0
#define ZSTD_LIB_DEPRECATED 0
#define ZSTD_NOBENCH
#ifndef __EMSCRIPTEN__
#define ZSTD_MULTITHREAD
#endif
/* lib/common */
#include "debug.c"
#include "entropy_common.c"
#include "error_private.c"
#include "fse_decompress.c"
#include "threading.c"
#include "pool.c"
#include "zstd_common.c"
/* lib/compress */
#include "fse_compress.c"
#include "hist.c"
#include "huf_compress.c"
#include "zstd_compress_literals.c"
#include "zstd_compress_sequences.c"
#include "zstd_compress_superblock.c"
#include "zstd_compress.c"
#include "zstd_double_fast.c"
#include "zstd_fast.c"
#include "zstd_lazy.c"
#include "zstd_ldm.c"
#include "zstd_opt.c"
#ifdef ZSTD_MULTITHREAD
#include "zstdmt_compress.c"
#endif
/* lib/decompress */
#include "huf_decompress.c"
#include "zstd_ddict.c"
#include "zstd_decompress.c"
#include "zstd_decompress_block.c"

56
contrib/single_file_libs/zstddeclib-in.c Executable file
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@ -0,0 +1,56 @@
/**
* \file zstddeclib.c
* Single-file Zstandard decompressor.
*
* Generate using:
* \code
* combine.sh -r ../../lib -r ../../lib/common -r ../../lib/decompress -o zstddeclib.c zstddeclib-in.c
* \endcode
*/
/*
* Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
/*
* Settings to bake for the standalone decompressor.
*
* Note: It's important that none of these affects 'zstd.h' (only the
* implementation files we're amalgamating).
*
* Note: MEM_MODULE stops xxhash redefining BYTE, U16, etc., which are also
* defined in mem.h (breaking C99 compatibility).
*
* Note: the undefs for xxHash allow Zstd's implementation to coinside with with
* standalone xxHash usage (with global defines).
*/
#define DEBUGLEVEL 0
#define MEM_MODULE
#undef XXH_NAMESPACE
#define XXH_NAMESPACE ZSTD_
#undef XXH_PRIVATE_API
#define XXH_PRIVATE_API
#undef XXH_INLINE_ALL
#define XXH_INLINE_ALL
#define ZSTD_LEGACY_SUPPORT 0
#define ZSTD_LIB_COMPRESSION 0
#define ZSTD_LIB_DEPRECATED 0
#define ZSTD_NOBENCH
#define ZSTD_STRIP_ERROR_STRINGS
/* lib/common */
#include "debug.c"
#include "entropy_common.c"
#include "error_private.c"
#include "fse_decompress.c"
#include "zstd_common.c"
/* lib/decompress */
#include "huf_decompress.c"
#include "zstd_ddict.c"
#include "zstd_decompress.c"
#include "zstd_decompress_block.c"

4
lib/common/error_private.h
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@ -57,6 +57,10 @@ ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }
/* check and forward error code */
#define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e
#define CHECK_F(f) { CHECK_V_F(_var_err__, f); }
/*-****************************************
* Error Strings

5
lib/common/fse_decompress.c
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@ -31,11 +31,6 @@
#define FSE_isError ERR_isError
#define FSE_STATIC_ASSERT(c) DEBUG_STATIC_ASSERT(c) /* use only *after* variable declarations */
/* check and forward error code */
#ifndef CHECK_F
#define CHECK_F(f) { size_t const e = f; if (FSE_isError(e)) return e; }
#endif
/* **************************************************************
* Templates

9
lib/common/zstd_internal.h
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@ -248,6 +248,15 @@ void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length, ZSTD_overlap_e
}
}
MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
{
size_t const length = MIN(dstCapacity, srcSize);
if (length > 0) {
memcpy(dst, src, length);
}
return length;
}
/* define "workspace is too large" as this number of times larger than needed */
#define ZSTD_WORKSPACETOOLARGE_FACTOR 3

3
lib/compress/fse_compress.c
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@ -625,9 +625,6 @@ size_t FSE_compress_usingCTable (void* dst, size_t dstSize,
size_t FSE_compressBound(size_t size) { return FSE_COMPRESSBOUND(size); }
#define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e
#define CHECK_F(f) { CHECK_V_F(_var_err__, f); }
/* FSE_compress_wksp() :
* Same as FSE_compress2(), but using an externally allocated scratch buffer (`workSpace`).
* `wkspSize` size must be `(1<<tableLog)`.

2
lib/compress/huf_compress.c
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@ -40,8 +40,6 @@
****************************************************************/
#define HUF_isError ERR_isError
#define HUF_STATIC_ASSERT(c) DEBUG_STATIC_ASSERT(c) /* use only *after* variable declarations */
#define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e
#define CHECK_F(f) { CHECK_V_F(_var_err__, f); }
/* **************************************************************

8
lib/compress/zstd_compress.c
View File

@ -3749,14 +3749,6 @@ static size_t ZSTD_nextInputSizeHint(const ZSTD_CCtx* cctx)
return hintInSize;
}
static size_t ZSTD_limitCopy(void* dst, size_t dstCapacity,
const void* src, size_t srcSize)
{
size_t const length = MIN(dstCapacity, srcSize);
if (length) memcpy(dst, src, length);
return length;
}
/** ZSTD_compressStream_generic():
* internal function for all *compressStream*() variants
* non-static, because can be called from zstdmt_compress.c

3
lib/decompress/huf_decompress.c
View File

@ -41,9 +41,6 @@
* Error Management
****************************************************************/
#define HUF_isError ERR_isError
#ifndef CHECK_F
#define CHECK_F(f) { size_t const err_ = (f); if (HUF_isError(err_)) return err_; }
#endif
/* **************************************************************

9
lib/decompress/zstd_decompress.c
View File

@ -1499,15 +1499,6 @@ size_t ZSTD_estimateDStreamSize_fromFrame(const void* src, size_t srcSize)
/* ***** Decompression ***** */
MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
{
size_t const length = MIN(dstCapacity, srcSize);
if (length > 0) {
memcpy(dst, src, length);
}
return length;
}
static int ZSTD_DCtx_isOverflow(ZSTD_DStream* zds, size_t const neededInBuffSize, size_t const neededOutBuffSize)
{
return (zds->inBuffSize + zds->outBuffSize) >= (neededInBuffSize + neededOutBuffSize) * ZSTD_WORKSPACETOOLARGE_FACTOR;