mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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90 lines
3.5 KiB
C++
90 lines
3.5 KiB
C++
// Copyright (c) 2016 Google Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and/or associated documentation files (the
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// "Materials"), to deal in the Materials without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Materials, and to
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// permit persons to whom the Materials are furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Materials.
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//
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// MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS
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// KHRONOS STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS
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// SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT
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// https://www.khronos.org/registry/
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//
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// THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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// MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
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#ifndef LIBSPIRV_TOOLS_IO_H_
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#define LIBSPIRV_TOOLS_IO_H_
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#include <cstdint>
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#include <cstdio>
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#include <vector>
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// Appends the content from the file named as |filename| to |data|, assuming
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// each element in the file is of type |T|. The file is opened with the given
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// |mode|. If |filename| is nullptr or "-", reads from the standard input. If
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// any error occurs, writes error messages to standard error and returns false.
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template <typename T>
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bool ReadFile(const char* filename, const char* mode, std::vector<T>* data) {
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const int buf_size = 1024;
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const bool use_file = filename && strcmp("-", filename);
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if (FILE* fp = (use_file ? fopen(filename, mode) : stdin)) {
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T buf[buf_size];
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while (size_t len = fread(buf, sizeof(T), buf_size, fp)) {
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data->insert(data->end(), buf, buf + len);
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}
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if (ftell(fp) == -1L) {
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if (ferror(fp)) {
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fprintf(stderr, "error: error reading file '%s'\n", filename);
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return false;
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}
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} else {
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if (sizeof(T) != 1 && (ftell(fp) % sizeof(T))) {
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fprintf(stderr, "error: corrupted word found in file '%s'\n", filename);
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return false;
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}
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}
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if (use_file) fclose(fp);
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} else {
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fprintf(stderr, "error: file does not exist '%s'\n", filename);
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return false;
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}
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return true;
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}
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// Writes the given |data| into the file named as |filename| using the given
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// |mode|, assuming |data| is an array of |count| elements of type |T|. If
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// |filename| is nullptr or "-", writes to standard output. If any error occurs,
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// returns false and outputs error message to standard error.
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template <typename T>
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bool WriteFile(const char* filename, const char* mode, const T* data,
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size_t count) {
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const bool use_stdout =
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!filename || (filename[0] == '-' && filename[1] == '\0');
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if (FILE* fp = (use_stdout ? stdout : fopen(filename, mode))) {
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size_t written = fwrite(data, sizeof(T), count, fp);
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if (count != written) {
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fprintf(stderr, "error: could not write to file '%s'\n", filename);
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return false;
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}
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if (!use_stdout) fclose(fp);
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} else {
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fprintf(stderr, "error: could not open file '%s'\n", filename);
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return false;
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}
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return true;
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}
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#endif // LIBSPIRV_TOOLS_IO_H_
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