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Side by Side Diff: ppapi/native_client/src/trusted/plugin/file_utils.cc

Issue 15697019: Parametrize names of llc and ld nexes by reading them from the resource info JSON file. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Fix Win build Created 7 years, 7 months ago
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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Some common file utilities for plugin code.
6
7 #include "native_client/src/trusted/plugin/file_utils.h"
8
9 #include <fcntl.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12
13 #include <sys/stat.h>
14 #include <sys/types.h>
15
16 #include "native_client/src/include/nacl_scoped_ptr.h"
17 #include "native_client/src/include/portability_io.h"
18 #include "native_client/src/include/portability_string.h"
19
20
21 namespace plugin { namespace file_utils {
jvoung (off chromium) 2013/05/23 20:33:19 same, separate lines
eliben 2013/05/23 20:54:25 Done.
22
23 StatusCode SlurpFile(int32_t fd,
24 nacl::string& out_buf,
25 size_t max_size_to_read) {
26 struct stat stat_buf;
27 if (fstat(fd, &stat_buf) != 0) {
28 CLOSE(fd);
29 return ERROR_STAT;
30 }
31
32 // Figure out how large a buffer we need to slurp the whole file (with a
33 // '\0' at the end).
34 size_t bytes_to_read = static_cast<size_t>(stat_buf.st_size);
35 if (bytes_to_read > max_size_to_read - 1) {
36 CLOSE(fd);
37 return ERROR_FILE_TOO_LARGE;
38 }
39
40 FILE* input_file = fdopen(fd, "rb");
41 if (!input_file) {
42 CLOSE(fd);
43 return ERROR_OPEN;
44 }
45 // From here on, closing input_file will automatically close fd.
46
47 nacl::scoped_array<char> buffer(new char[bytes_to_read + 1]);
48 if (buffer == NULL) {
49 fclose(input_file);
50 return ERROR_MEM_ALLOC;
51 }
52
53 size_t total_bytes_read = 0;
54 while (bytes_to_read > 0) {
55 size_t bytes_this_read = fread(&buffer[total_bytes_read],
56 sizeof(char),
57 bytes_to_read,
58 input_file);
59 if (bytes_this_read < bytes_to_read && (feof(input_file) ||
60 ferror(input_file))) {
61 fclose(input_file);
62 return ERROR_READ;
63 }
64 total_bytes_read += bytes_this_read;
65 bytes_to_read -= bytes_this_read;
66 }
67
68 fclose(input_file);
69 buffer[total_bytes_read] = '\0';
70 out_buf = buffer.get();
71 return SUCCESS;
72 }
73
74 } // namespace file_utils
75 } // namespace plugin
76
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