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-rw-r--r--src/couch/priv/couch_js/86/util.cpp348
1 files changed, 348 insertions, 0 deletions
diff --git a/src/couch/priv/couch_js/86/util.cpp b/src/couch/priv/couch_js/86/util.cpp
new file mode 100644
index 000000000..cd120a03f
--- /dev/null
+++ b/src/couch/priv/couch_js/86/util.cpp
@@ -0,0 +1,348 @@
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <sstream>
+
+#include <jsapi.h>
+#include <jsfriendapi.h>
+#include <js/CharacterEncoding.h>
+#include <js/Conversions.h>
+#include <js/Initialization.h>
+#include <js/MemoryFunctions.h>
+#include <js/RegExp.h>
+
+#include "help.h"
+#include "util.h"
+
+std::string
+js_to_string(JSContext* cx, JS::HandleValue val)
+{
+ JS::AutoSaveExceptionState exc_state(cx);
+ JS::RootedString sval(cx);
+ sval = val.toString();
+
+ JS::UniqueChars chars(JS_EncodeStringToUTF8(cx, sval));
+ if(!chars) {
+ JS_ClearPendingException(cx);
+ return std::string();
+ }
+
+ return chars.get();
+}
+
+bool
+js_to_string(JSContext* cx, JS::HandleValue val, std::string& str)
+{
+ if(!val.isString()) {
+ return false;
+ }
+
+ if(JS_GetStringLength(val.toString()) == 0) {
+ str = "";
+ return true;
+ }
+
+ std::string conv = js_to_string(cx, val);
+ if(!conv.size()) {
+ return false;
+ }
+
+ str = conv;
+ return true;
+}
+
+JSString*
+string_to_js(JSContext* cx, const std::string& raw)
+{
+ JS::UTF8Chars utf8(raw.c_str(), raw.size());
+ JS::UniqueTwoByteChars utf16;
+ size_t len;
+
+ utf16.reset(JS::UTF8CharsToNewTwoByteCharsZ(cx, utf8, &len, js::MallocArena).get());
+ if(!utf16) {
+ return nullptr;
+ }
+
+ return JS_NewUCString(cx, std::move(utf16), len);
+}
+
+size_t
+couch_readfile(const char* file, char** outbuf_p)
+{
+ FILE* fp;
+ char fbuf[16384];
+ char *buf = NULL;
+ char* tmp;
+ size_t nread = 0;
+ size_t buflen = 0;
+
+ if(strcmp(file, "-") == 0) {
+ fp = stdin;
+ } else {
+ fp = fopen(file, "r");
+ if(fp == NULL) {
+ fprintf(stderr, "Failed to read file: %s\n", file);
+ exit(3);
+ }
+ }
+
+ while((nread = fread(fbuf, 1, 16384, fp)) > 0) {
+ if(buf == NULL) {
+ buf = new char[nread + 1];
+ if(buf == NULL) {
+ fprintf(stderr, "Out of memory.\n");
+ exit(3);
+ }
+ memcpy(buf, fbuf, nread);
+ } else {
+ tmp = new char[buflen + nread + 1];
+ if(tmp == NULL) {
+ fprintf(stderr, "Out of memory.\n");
+ exit(3);
+ }
+ memcpy(tmp, buf, buflen);
+ memcpy(tmp+buflen, fbuf, nread);
+ delete buf;
+ buf = tmp;
+ }
+ buflen += nread;
+ buf[buflen] = '\0';
+ }
+ *outbuf_p = buf;
+ return buflen ;
+}
+
+couch_args*
+couch_parse_args(int argc, const char* argv[])
+{
+ couch_args* args;
+ int i = 1;
+
+ args = new couch_args();
+ if(args == NULL)
+ return NULL;
+
+ args->eval = 0;
+ args->stack_size = 64L * 1024L * 1024L;
+ args->scripts = nullptr;
+
+ while(i < argc) {
+ if(strcmp("-h", argv[i]) == 0) {
+ DISPLAY_USAGE;
+ exit(0);
+ } else if(strcmp("-V", argv[i]) == 0) {
+ DISPLAY_VERSION;
+ exit(0);
+ } else if(strcmp("-S", argv[i]) == 0) {
+ args->stack_size = atoi(argv[++i]);
+ if(args->stack_size <= 0) {
+ fprintf(stderr, "Invalid stack size.\n");
+ exit(2);
+ }
+ } else if(strcmp("--eval", argv[i]) == 0) {
+ args->eval = 1;
+ } else if(strcmp("--", argv[i]) == 0) {
+ i++;
+ break;
+ } else {
+ break;
+ }
+ i++;
+ }
+
+ if(i >= argc) {
+ DISPLAY_USAGE;
+ exit(3);
+ }
+ args->scripts = argv + i;
+
+ return args;
+}
+
+
+int
+couch_fgets(char* buf, int size, FILE* fp)
+{
+ int n, i, c;
+
+ if(size <= 0) return -1;
+ n = size - 1;
+
+ for(i = 0; i < n && (c = getc(fp)) != EOF; i++) {
+ buf[i] = c;
+ if(c == '\n') {
+ i++;
+ break;
+ }
+ }
+
+ buf[i] = '\0';
+ return i;
+}
+
+
+JSString*
+couch_readline(JSContext* cx, FILE* fp)
+{
+ JSString* str;
+ char* bytes = NULL;
+ char* tmp = NULL;
+ size_t used = 0;
+ size_t byteslen = 256;
+ size_t oldbyteslen = 256;
+ size_t readlen = 0;
+
+ bytes = static_cast<char*>(JS_malloc(cx, byteslen));
+ if(bytes == NULL) return NULL;
+
+ while((readlen = couch_fgets(bytes+used, byteslen-used, fp)) > 0) {
+ used += readlen;
+
+ if(bytes[used-1] == '\n') {
+ bytes[used-1] = '\0';
+ break;
+ }
+
+ // Double our buffer and read more.
+ oldbyteslen = byteslen;
+ byteslen *= 2;
+ tmp = static_cast<char*>(JS_realloc(cx, bytes, oldbyteslen, byteslen));
+ if(!tmp) {
+ JS_free(cx, bytes);
+ return NULL;
+ }
+
+ bytes = tmp;
+ }
+
+ // Treat empty strings specially
+ if(used == 0) {
+ JS_free(cx, bytes);
+ return JS_NewStringCopyZ(cx, nullptr);
+ }
+
+ // Shrink the buffer to the actual data size
+ tmp = static_cast<char*>(JS_realloc(cx, bytes, byteslen, used));
+ if(!tmp) {
+ JS_free(cx, bytes);
+ return NULL;
+ }
+ bytes = tmp;
+ byteslen = used;
+
+ str = string_to_js(cx, std::string(tmp));
+ JS_free(cx, bytes);
+ return str;
+}
+
+
+void
+couch_print(JSContext* cx, JS::HandleValue obj, bool use_stderr)
+{
+ FILE *stream = stdout;
+
+ if (use_stderr) {
+ stream = stderr;
+ }
+ std::string val = js_to_string(cx, obj);
+ fprintf(stream, "%s\n", val.c_str());
+ fflush(stream);
+}
+
+
+void
+couch_error(JSContext* cx, JSErrorReport* report)
+{
+ if(!report) {
+ return;
+ }
+
+ if(report->isWarning()) {
+ return;
+ }
+
+ std::ostringstream msg;
+ msg << "error: " << report->message().c_str();
+
+ mozilla::Maybe<JSAutoRealm> ar;
+ JS::RootedValue exc(cx);
+ JS::RootedObject exc_obj(cx);
+ JS::RootedObject stack_obj(cx);
+ JS::RootedString stack_str(cx);
+ JS::RootedValue stack_val(cx);
+ JSPrincipals* principals = GetRealmPrincipals(js::GetContextRealm(cx));
+
+ if(!JS_GetPendingException(cx, &exc)) {
+ goto done;
+ }
+
+ // Clear the exception before an JS method calls or the result is
+ // infinite, recursive error report generation.
+ JS_ClearPendingException(cx);
+
+ exc_obj.set(exc.toObjectOrNull());
+ stack_obj.set(JS::ExceptionStackOrNull(exc_obj));
+
+ if(!stack_obj) {
+ // Compilation errors don't have a stack
+
+ msg << " at ";
+
+ if(report->filename) {
+ msg << report->filename;
+ } else {
+ msg << "<unknown>";
+ }
+
+ if(report->lineno) {
+ msg << ':' << report->lineno << ':' << report->column;
+ }
+
+ goto done;
+ }
+
+ if(!JS::BuildStackString(cx, principals, stack_obj, &stack_str, 2)) {
+ goto done;
+ }
+
+ stack_val.set(JS::StringValue(stack_str));
+ msg << std::endl << std::endl << js_to_string(cx, stack_val).c_str();
+
+done:
+ msg << std::endl;
+ fprintf(stderr, "%s", msg.str().c_str());
+}
+
+
+void
+couch_oom(JSContext* cx, void* data)
+{
+ fprintf(stderr, "out of memory\n");
+ exit(1);
+}
+
+
+bool
+couch_load_funcs(JSContext* cx, JS::HandleObject obj, JSFunctionSpec* funcs)
+{
+ JSFunctionSpec* f;
+ for(f = funcs; f->name; f++) {
+ if(!JS_DefineFunction(cx, obj, f->name.string(), f->call.op, f->nargs, f->flags)) {
+ fprintf(stderr, "Failed to create function: %s\n", f->name.string());
+ return false;
+ }
+ }
+ return true;
+}