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univalue: make spaceStr thread-safe

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Simply add spaces to the existing string instead of using a
temporary.

Fixes #4756.
This commit is contained in:
Wladimir J. van der Laan 2014-09-05 13:10:39 +02:00
parent 406f18cfc4
commit 41ef558aa9
No known key found for this signature in database
GPG Key ID: 74810B012346C9A6
1 changed files with 6 additions and 12 deletions
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18
src/univalue/univalue_write.cpp
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@ -70,15 +70,9 @@ string UniValue::write(unsigned int prettyIndent,
return s;
}
static string spaceStr;
static string indentStr(unsigned int prettyIndent, unsigned int indentLevel)
static void indentStr(unsigned int prettyIndent, unsigned int indentLevel, string& s)
{
unsigned int spaces = prettyIndent * indentLevel;
while (spaceStr.size() < spaces)
spaceStr += " ";
return spaceStr.substr(0, spaces);
s.append(prettyIndent * indentLevel, ' ');
}
void UniValue::writeArray(unsigned int prettyIndent, unsigned int indentLevel, string& s) const
@ -89,7 +83,7 @@ void UniValue::writeArray(unsigned int prettyIndent, unsigned int indentLevel, s
for (unsigned int i = 0; i < values.size(); i++) {
if (prettyIndent)
s += indentStr(prettyIndent, indentLevel);
indentStr(prettyIndent, indentLevel, s);
s += values[i].write(prettyIndent, indentLevel + 1);
if (i != (values.size() - 1)) {
s += ",";
@ -101,7 +95,7 @@ void UniValue::writeArray(unsigned int prettyIndent, unsigned int indentLevel, s
}
if (prettyIndent)
s += indentStr(prettyIndent, indentLevel - 1);
indentStr(prettyIndent, indentLevel - 1, s);
s += "]";
}
@ -113,7 +107,7 @@ void UniValue::writeObject(unsigned int prettyIndent, unsigned int indentLevel,
for (unsigned int i = 0; i < keys.size(); i++) {
if (prettyIndent)
s += indentStr(prettyIndent, indentLevel);
indentStr(prettyIndent, indentLevel, s);
s += "\"" + json_escape(keys[i]) + "\":";
if (prettyIndent)
s += " ";
@ -125,7 +119,7 @@ void UniValue::writeObject(unsigned int prettyIndent, unsigned int indentLevel,
}
if (prettyIndent)
s += indentStr(prettyIndent, indentLevel - 1);
indentStr(prettyIndent, indentLevel - 1, s);
s += "}";
}