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/*
* Copyright (c) 2011 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "ppapi/native_client/src/trusted/plugin/utility.h"
namespace plugin {
int gNaClPluginDebugPrintEnabled = -1;
FILE* gNaClPluginLogFile = NULL;
/*
* Prints formatted message to the log.
*/
int NaClPluginPrintLog(const char *format, ...) {
if (NULL == gNaClPluginLogFile) {
return 0;
}
va_list arg;
int done;
va_start(arg, format);
done = vfprintf(gNaClPluginLogFile, format, arg);
va_end(arg);
fflush(gNaClPluginLogFile);
return done;
}
/*
* Opens file where plugin log should be written. The file name is
* taken from NACL_PLUGIN_LOG environment variable.
* If environment variable doesn't exist or file can't be opened,
* the function returns stdout.
*/
FILE* NaClPluginLogFileEnv() {
char* file = getenv("NACL_PLUGIN_LOG");
if (NULL != file) {
FILE* log_file = fopen(file, "w+");
if (NULL == log_file) {
return stdout;
}
return log_file;
}
return stdout;
}
/*
* Currently looks for presence of NACL_PLUGIN_DEBUG and returns
* 0 if absent and 1 if present. In the future we may include notions
* of verbosity level.
*/
int NaClPluginDebugPrintCheckEnv() {
char* env = getenv("NACL_PLUGIN_DEBUG");
return (NULL != env);
}
bool IsValidIdentifierString(const char* strval, uint32_t* length) {
// This function is supposed to recognize valid ECMAScript identifiers,
// as described in
// http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf
// It is currently restricted to only the ASCII subset.
// TODO(sehr): Recognize the full Unicode formulation of identifiers.
// TODO(sehr): Make this table-driven if efficiency becomes a problem.
if (NULL != length) {
*length = 0;
}
if (NULL == strval) {
return false;
}
static const char* kValidFirstChars =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz$_";
static const char* kValidOtherChars =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz$_"
"0123456789";
if (NULL == strchr(kValidFirstChars, strval[0])) {
return false;
}
uint32_t pos;
for (pos = 1; ; ++pos) {
if (0 == pos) {
// Unsigned overflow.
return false;
}
int c = strval[pos];
if (0 == c) {
break;
}
if (NULL == strchr(kValidOtherChars, c)) {
return false;
}
}
if (NULL != length) {
*length = pos;
}
return true;
}
} // namespace plugin
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