Bump bundled libarchive version to 3.5.2

- Update bunlded libarchive version used on Windows/Mac
- Enable requested zstd support while we are at it. Closes #211
This commit is contained in:
Floris Bos 2021-12-09 12:22:14 +01:00
parent 03e083b4f3
commit 67618a2eac
1869 changed files with 166685 additions and 9489 deletions

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# build artifacts
zstddeclib.c
zstdenclib.c
zstd.c
zstd.h
# test artifacts
temp*

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# 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/build/single_file_libs
./combine.sh -r ../../lib -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 1.2MB) 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/build/single_file_libs
./combine.sh -r ../../lib -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).

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#!/bin/sh
# Temporary compiled binary
OUT_FILE="tempbin"
# Optional temporary compiled WebAssembly
OUT_WASM="temp.wasm"
# Source files to compile using Emscripten.
IN_FILES="examples/emscripten.c"
# Emscripten build using emcc.
emscripten_emcc_build() {
# Compile the the same example as above
CC_FLAGS="-Wall -Wextra -Wshadow -Werror -Os -g0 -flto"
emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM $IN_FILES
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling ${IN_FILES}: FAILED"
exit 1
fi
echo "Compiling ${IN_FILES}: PASSED"
rm -f $OUT_WASM
}
# Emscripten build using docker.
emscripten_docker_build() {
docker container run --rm \
--volume $PWD:/code \
--workdir /code \
emscripten/emsdk:latest \
emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM $IN_FILES
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling ${IN_FILES} (using docker): FAILED"
exit 1
fi
echo "Compiling ${IN_FILES} (using docker): PASSED"
rm -f $OUT_WASM
}
# Try Emscripten build using emcc or docker.
try_emscripten_build() {
which emcc > /dev/null
if [ $? -eq 0 ]; then
emscripten_emcc_build
return $?
fi
which docker > /dev/null
if [ $? -eq 0 ]; then
emscripten_docker_build
return $?
fi
echo "(Skipping Emscripten test)"
}
# Amalgamate the sources
./create_single_file_decoder.sh
# Did combining work?
if [ $? -ne 0 ]; then
echo "Single file decoder creation script: FAILED"
exit 1
fi
echo "Single file decoder creation script: PASSED"
# Compile the generated output
cc -Wall -Wextra -Wshadow -Werror -Os -g0 -o $OUT_FILE examples/simple.c
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling simple.c: FAILED"
exit 1
fi
echo "Compiling simple.c: PASSED"
# Run then delete the compiled output
./$OUT_FILE
retVal=$?
rm -f $OUT_FILE
# Did the test work?
if [ $retVal -ne 0 ]; then
echo "Running simple.c: FAILED"
exit 1
fi
echo "Running simple.c: PASSED"
# Try Emscripten build if emcc or docker command is available.
try_emscripten_build
exit 0

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#!/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"
# Source files to compile using Emscripten.
IN_FILES="zstd.c examples/roundtrip.c"
# Emscripten build using emcc.
emscripten_emcc_build() {
# Compile the the same example as above
CC_FLAGS="-Wall -Wextra -Wshadow -Werror -Os -g0 -flto"
emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM $IN_FILES
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling ${IN_FILES}: FAILED"
exit 1
fi
echo "Compiling ${IN_FILES}: PASSED"
rm -f $OUT_WASM
}
# Emscripten build using docker.
emscripten_docker_build() {
docker container run --rm \
--volume $PWD:/code \
--workdir /code \
emscripten/emsdk:latest \
emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM $IN_FILES
# Did compilation work?
if [ $? -ne 0 ]; then
echo "Compiling ${IN_FILES} (using docker): FAILED"
exit 1
fi
echo "Compiling ${IN_FILES} (using docker): PASSED"
rm -f $OUT_WASM
}
# Try Emscripten build using emcc or docker.
try_emscripten_build() {
which emcc > /dev/null
if [ $? -eq 0 ]; then
emscripten_emcc_build
return $?
fi
which docker > /dev/null
if [ $? -eq 0 ]; then
emscripten_docker_build
return $?
fi
echo "(Skipping Emscripten test)"
}
# 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 -Wshadow -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"
# Try Emscripten build if emcc or docker command is available.
try_emscripten_build
exit 0

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#!/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: $0 -r ../my/path - r ../other/path -o out.c in.c"
exit 1
}
# Tests that the grep implementation works as expected (older OSX grep fails)
test_deps() {
if ! echo '#include "foo"' | grep -Eq '^\s*#\s*include\s*".+"'; then
echo "Aborting: the grep implementation fails to parse include lines"
exit 1
fi
if ! echo '"foo.h"' | sed -E 's/"([^"]+)"/\1/' | grep -Eq '^foo\.h$'; then
echo "Aborting: sed is unavailable or non-functional"
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
}
log_line() {
echo $@ >&2
}
# Find this file!
resolve_include() {
local srcdir=$1
local inc=$2
for root in $srcdir $ROOTS; do
if [ -f "$root/$inc" ]; then
# Try to reduce the file path into a canonical form (so that multiple)
# includes of the same file are successfully deduplicated, even if they
# are expressed differently.
local relpath="$(realpath --relative-to . "$root/$inc" 2>/dev/null)"
if [ "$relpath" != "" ]; then # not all realpaths support --relative-to
echo "$relpath"
return 0
fi
local relpath="$(realpath "$root/$inc" 2>/dev/null)"
if [ "$relpath" != "" ]; then # not all distros have realpath...
echo "$relpath"
return 0
fi
# Fallback on Python to reduce the path if the above fails.
local relpath=$(python -c "import os,sys; print os.path.relpath(sys.argv[1])" "$root/$inc" 2>/dev/null)
if [ "$relpath" != "" ]; then # not all distros have realpath...
echo "$relpath"
return 0
fi
# Worst case, fall back to just the root + relative include path. The
# problem with this is that it is possible to emit multiple different
# resolved paths to the same file, depending on exactly how its included.
# Since the main loop below keeps a list of the resolved paths it's
# already included, in order to avoid repeated includes, this failure to
# produce a canonical/reduced path can lead to multiple inclusions of the
# same file. But it seems like the resulting single file library still
# works (hurray include guards!), so I guess it's ok.
echo "$root/$inc"
return 0
fi
done
return 1
}
# Adds the contents of $1 with any of its includes inlined
add_file() {
local file=$1
if [ -n "$file" ]; then
log_line "Processing: $file"
# Get directory of the current so we can resolve relative includes
local srcdir="$(dirname "$file")"
# Read the file
local line=
while IFS= read -r line; do
if echo "$line" | grep -Eq '^\s*#\s*include\s*".+"'; then
# We have an include directive so strip the (first) file
local inc=$(echo "$line" | grep -Eo '".*"' | sed -E 's/"([^"]+)"/\1/' | head -1)
local res_inc="$(resolve_include "$srcdir" "$inc")"
if list_has_item "$XINCS" "$inc"; then
# The file was excluded so error if the source attempts to use it
write_line "#error Using excluded file: $inc"
log_line "Excluding: $inc"
else
if ! list_has_item "$FOUND" "$res_inc"; then
# The file was not previously encountered
FOUND="$FOUND $res_inc"
if list_has_item "$KINCS" "$inc"; then
# But the include was flagged to keep as included
write_line "/**** *NOT* inlining $inc ****/"
write_line "$line"
log_line "Not Inlining: $inc"
else
# The file was neither excluded nor seen before so inline it
write_line "/**** start inlining $inc ****/"
add_file "$res_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\""
log_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_deps
add_file "$1"
else
echo "Input file not found: \"$1\""
exit 1
fi
else
usage
fi
exit 0

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#!/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" -o zstddeclib.c zstddeclib-in.c
# Did combining work?
if [ $? -ne 0 ]; then
echo "Combine script: FAILED"
exit 1
fi
echo "Combine script: PASSED"

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#!/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" -o zstd.c zstd-in.c
# Did combining work?
if [ $? -ne 0 ]; then
echo "Combine script: FAILED"
exit 1
fi
echo "Combine script: PASSED"

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# Single File ZStandard Examples
The examples `#include` the generated `zstddeclib.c` directly but work equally as well when including `zstd.h` and compiling the amalgamated source separately.
`simple.c` is the most basic example of decompressing content and verifying the result.
`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).
`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).

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/**
* \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;
}

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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<title>Emscripten Shell</title>
<style>
body {background:#333; font-family:"Verdana","Helvetica Neue","Helvetica","Arial",sans-serif; margin:1em 0;}
#canvas{position:absolute; top:0px; left:0px; border:none; margin:0; width: 100%; height: 100%; overflow: hidden; display: block;}
</style>
</head>
<body>
<canvas id="canvas" oncontextmenu="event.preventDefault()"></canvas>
<script>
function trace(msg) {
console.log(msg);
}
var Module = {
print: trace, printErr: trace, setStatus: trace, monitorRunDependencies: trace,
canvas: (function() {
return document.getElementById("canvas");
})(),
preRun: [], postRun: [],
};
</script>
{{{ SCRIPT }}}
</body>
</html>

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@ -0,0 +1,75 @@
/**
* \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;
}

File diff suppressed because it is too large Load diff

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@ -0,0 +1,261 @@
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0x84, 0xa4, 0x1d, 0xa4, 0x1d, 0x82, 0x1c, 0xef, 0xaf, 0x0e, 0x63, 0x47,
0x6d, 0x10, 0xb9, 0xec, 0xd8, 0x2d, 0x3b, 0x9e, 0x21, 0xb1, 0x67, 0x48,
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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,
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/**
* \file zstd.c
* Single-file Zstandard library.
*
* Generate using:
* \code
* combine.sh -r ../../lib -o zstd.c zstd-in.c
* \endcode
*/
/*
* Copyright (c) 2016-2021, 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
#ifndef __EMSCRIPTEN__
#define ZSTD_MULTITHREAD
#endif
#define ZSTD_TRACE 0
/* Include zstd_deps.h first with all the options we need enabled. */
#define ZSTD_DEPS_NEED_MALLOC
#define ZSTD_DEPS_NEED_MATH64
#include "common/zstd_deps.h"
#include "common/debug.c"
#include "common/entropy_common.c"
#include "common/error_private.c"
#include "common/fse_decompress.c"
#include "common/threading.c"
#include "common/pool.c"
#include "common/zstd_common.c"
#include "compress/fse_compress.c"
#include "compress/hist.c"
#include "compress/huf_compress.c"
#include "compress/zstd_compress_literals.c"
#include "compress/zstd_compress_sequences.c"
#include "compress/zstd_compress_superblock.c"
#include "compress/zstd_compress.c"
#include "compress/zstd_double_fast.c"
#include "compress/zstd_fast.c"
#include "compress/zstd_lazy.c"
#include "compress/zstd_ldm.c"
#include "compress/zstd_opt.c"
#ifdef ZSTD_MULTITHREAD
#include "compress/zstdmt_compress.c"
#endif
#include "decompress/huf_decompress.c"
#include "decompress/zstd_ddict.c"
#include "decompress/zstd_decompress.c"
#include "decompress/zstd_decompress_block.c"
#include "dictBuilder/cover.c"
#include "dictBuilder/divsufsort.c"
#include "dictBuilder/fastcover.c"
#include "dictBuilder/zdict.c"

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/**
* \file zstddeclib.c
* Single-file Zstandard decompressor.
*
* Generate using:
* \code
* combine.sh -r ../../lib -o zstddeclib.c zstddeclib-in.c
* \endcode
*/
/*
* Copyright (c) 2016-2021, 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_STRIP_ERROR_STRINGS
#define ZSTD_TRACE 0
/* Include zstd_deps.h first with all the options we need enabled. */
#define ZSTD_DEPS_NEED_MALLOC
#include "common/zstd_deps.h"
#include "common/debug.c"
#include "common/entropy_common.c"
#include "common/error_private.c"
#include "common/fse_decompress.c"
#include "common/zstd_common.c"
#include "decompress/huf_decompress.c"
#include "decompress/zstd_ddict.c"
#include "decompress/zstd_decompress.c"
#include "decompress/zstd_decompress_block.c"