147 lines
4.0 KiB
Go
147 lines
4.0 KiB
Go
// Copyright (c) 2017, Google Inc.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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// embed_test_data generates a C++ source file which exports a function,
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// GetTestData, which looks up the specified data files.
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package main
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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)
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func quote(in []byte) string {
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var buf bytes.Buffer
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buf.WriteByte('"')
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for _, b := range in {
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switch b {
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case '\a':
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buf.WriteString(`\a`)
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case '\b':
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buf.WriteString(`\b`)
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case '\f':
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buf.WriteString(`\f`)
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case '\n':
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buf.WriteString(`\n`)
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case '\r':
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buf.WriteString(`\r`)
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case '\t':
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buf.WriteString(`\t`)
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case '\v':
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buf.WriteString(`\v`)
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case '"':
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buf.WriteString(`\"`)
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case '\\':
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buf.WriteString(`\\`)
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default:
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// printable ascii code [32, 126]
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if 32 <= b && b <= 126 {
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buf.WriteByte(b)
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} else {
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fmt.Fprintf(&buf, "\\x%02x", b)
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}
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}
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}
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buf.WriteByte('"')
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return buf.String()
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}
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func main() {
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fmt.Printf(`/* Copyright (c) 2017, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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/* This file is generated by:
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`)
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fmt.Printf(" * go run util/embed_test_data.go")
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for _, arg := range os.Args[1:] {
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fmt.Printf(" \\\n * %s", arg)
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}
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fmt.Printf(" */\n")
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fmt.Printf(`
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/* clang-format off */
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#include <stdlib.h>
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#include <string.h>
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#include <algorithm>
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#include <string>
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`)
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// MSVC limits the length of string constants, so we emit an array of
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// them and concatenate at runtime. We could also use a single array
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// literal, but this is less compact.
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const chunkSize = 8192
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for i, arg := range os.Args[1:] {
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data, err := ioutil.ReadFile(arg)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error reading %s: %s.\n", arg, err)
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os.Exit(1)
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}
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fmt.Printf("static const size_t kLen%d = %d;\n\n", i, len(data))
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fmt.Printf("static const char *kData%d[] = {\n", i)
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for len(data) > 0 {
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chunk := chunkSize
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if chunk > len(data) {
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chunk = len(data)
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}
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fmt.Printf(" %s,\n", quote(data[:chunk]))
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data = data[chunk:]
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}
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fmt.Printf("};\n")
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}
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fmt.Printf(`static std::string AssembleString(const char **data, size_t len) {
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std::string ret;
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for (size_t i = 0; i < len; i += %d) {
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size_t chunk = std::min(static_cast<size_t>(%d), len - i);
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ret.append(data[i / %d], chunk);
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}
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return ret;
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}
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/* Silence -Wmissing-declarations. */
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std::string GetTestData(const char *path);
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std::string GetTestData(const char *path) {
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`, chunkSize, chunkSize, chunkSize)
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for i, arg := range os.Args[1:] {
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fmt.Printf(" if (strcmp(path, %s) == 0) {\n", quote([]byte(arg)))
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fmt.Printf(" return AssembleString(kData%d, kLen%d);\n", i, i)
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fmt.Printf(" }\n")
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}
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fmt.Printf(` fprintf(stderr, "File not embedded: %%s.\n", path);
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abort();
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}
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`)
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}
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