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-rw-r--r--third_party/nix/src/libexpr/json-to-value.cc248
1 files changed, 126 insertions, 122 deletions
diff --git a/third_party/nix/src/libexpr/json-to-value.cc b/third_party/nix/src/libexpr/json-to-value.cc
index 8bae986f97fc..8615d9797fa8 100644
--- a/third_party/nix/src/libexpr/json-to-value.cc
+++ b/third_party/nix/src/libexpr/json-to-value.cc
@@ -1,149 +1,153 @@
 #include "json-to-value.hh"
-
 #include <cstring>
 
 namespace nix {
 
-
-static void skipWhitespace(const char * & s)
-{
-    while (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\r') s++;
+static void skipWhitespace(const char*& s) {
+  while (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\r') s++;
 }
 
-
-static string parseJSONString(const char * & s)
-{
-    string res;
-    if (*s++ != '"') throw JSONParseError("expected JSON string");
-    while (*s != '"') {
-        if (!*s) throw JSONParseError("got end-of-string in JSON string");
-        if (*s == '\\') {
-            s++;
-            if (*s == '"') res += '"';
-            else if (*s == '\\') res += '\\';
-            else if (*s == '/') res += '/';
-            else if (*s == '/') res += '/';
-            else if (*s == 'b') res += '\b';
-            else if (*s == 'f') res += '\f';
-            else if (*s == 'n') res += '\n';
-            else if (*s == 'r') res += '\r';
-            else if (*s == 't') res += '\t';
-            else if (*s == 'u') throw JSONParseError("\\u characters in JSON strings are currently not supported");
-            else throw JSONParseError("invalid escaped character in JSON string");
-            s++;
-        } else
-            res += *s++;
-    }
-    s++;
-    return res;
+static string parseJSONString(const char*& s) {
+  string res;
+  if (*s++ != '"') throw JSONParseError("expected JSON string");
+  while (*s != '"') {
+    if (!*s) throw JSONParseError("got end-of-string in JSON string");
+    if (*s == '\\') {
+      s++;
+      if (*s == '"')
+        res += '"';
+      else if (*s == '\\')
+        res += '\\';
+      else if (*s == '/')
+        res += '/';
+      else if (*s == '/')
+        res += '/';
+      else if (*s == 'b')
+        res += '\b';
+      else if (*s == 'f')
+        res += '\f';
+      else if (*s == 'n')
+        res += '\n';
+      else if (*s == 'r')
+        res += '\r';
+      else if (*s == 't')
+        res += '\t';
+      else if (*s == 'u')
+        throw JSONParseError(
+            "\\u characters in JSON strings are currently not supported");
+      else
+        throw JSONParseError("invalid escaped character in JSON string");
+      s++;
+    } else
+      res += *s++;
+  }
+  s++;
+  return res;
 }
 
+static void parseJSON(EvalState& state, const char*& s, Value& v) {
+  skipWhitespace(s);
 
-static void parseJSON(EvalState & state, const char * & s, Value & v)
-{
-    skipWhitespace(s);
+  if (!*s) throw JSONParseError("expected JSON value");
 
-    if (!*s) throw JSONParseError("expected JSON value");
-
-    if (*s == '[') {
-        s++;
-        ValueVector values;
-        values.reserve(128);
-        skipWhitespace(s);
-        while (1) {
-            if (values.empty() && *s == ']') break;
-            Value * v2 = state.allocValue();
-            parseJSON(state, s, *v2);
-            values.push_back(v2);
-            skipWhitespace(s);
-            if (*s == ']') break;
-            if (*s != ',') throw JSONParseError("expected ',' or ']' after JSON array element");
-            s++;
-        }
-        s++;
-        state.mkList(v, values.size());
-        for (size_t n = 0; n < values.size(); ++n)
-            v.listElems()[n] = values[n];
+  if (*s == '[') {
+    s++;
+    ValueVector values;
+    values.reserve(128);
+    skipWhitespace(s);
+    while (1) {
+      if (values.empty() && *s == ']') break;
+      Value* v2 = state.allocValue();
+      parseJSON(state, s, *v2);
+      values.push_back(v2);
+      skipWhitespace(s);
+      if (*s == ']') break;
+      if (*s != ',')
+        throw JSONParseError("expected ',' or ']' after JSON array element");
+      s++;
     }
+    s++;
+    state.mkList(v, values.size());
+    for (size_t n = 0; n < values.size(); ++n) v.listElems()[n] = values[n];
+  }
 
-    else if (*s == '{') {
-        s++;
-        ValueMap attrs;
-        while (1) {
-            skipWhitespace(s);
-            if (attrs.empty() && *s == '}') break;
-            string name = parseJSONString(s);
-            skipWhitespace(s);
-            if (*s != ':') throw JSONParseError("expected ':' in JSON object");
-            s++;
-            Value * v2 = state.allocValue();
-            parseJSON(state, s, *v2);
-            attrs[state.symbols.create(name)] = v2;
-            skipWhitespace(s);
-            if (*s == '}') break;
-            if (*s != ',') throw JSONParseError("expected ',' or '}' after JSON member");
-            s++;
-        }
-        state.mkAttrs(v, attrs.size());
-        for (auto & i : attrs)
-            v.attrs->push_back(Attr(i.first, i.second));
-        v.attrs->sort();
-        s++;
+  else if (*s == '{') {
+    s++;
+    ValueMap attrs;
+    while (1) {
+      skipWhitespace(s);
+      if (attrs.empty() && *s == '}') break;
+      string name = parseJSONString(s);
+      skipWhitespace(s);
+      if (*s != ':') throw JSONParseError("expected ':' in JSON object");
+      s++;
+      Value* v2 = state.allocValue();
+      parseJSON(state, s, *v2);
+      attrs[state.symbols.create(name)] = v2;
+      skipWhitespace(s);
+      if (*s == '}') break;
+      if (*s != ',')
+        throw JSONParseError("expected ',' or '}' after JSON member");
+      s++;
     }
+    state.mkAttrs(v, attrs.size());
+    for (auto& i : attrs) v.attrs->push_back(Attr(i.first, i.second));
+    v.attrs->sort();
+    s++;
+  }
 
-    else if (*s == '"') {
-        mkString(v, parseJSONString(s));
-    }
+  else if (*s == '"') {
+    mkString(v, parseJSONString(s));
+  }
 
-    else if (isdigit(*s) || *s == '-' || *s == '.' ) {
-        // Buffer into a string first, then use built-in C++ conversions
-        std::string tmp_number;
-        ValueType number_type = tInt;
-
-        while (isdigit(*s) || *s == '-' || *s == '.' || *s == 'e' || *s == 'E') {
-            if (*s == '.' || *s == 'e' || *s == 'E')
-                number_type = tFloat;
-            tmp_number += *s++;
-        }
-
-        try {
-            if (number_type == tFloat)
-                mkFloat(v, stod(tmp_number));
-            else
-                mkInt(v, stol(tmp_number));
-        } catch (std::invalid_argument & e) {
-            throw JSONParseError("invalid JSON number");
-        } catch (std::out_of_range & e) {
-            throw JSONParseError("out-of-range JSON number");
-        }
-    }
+  else if (isdigit(*s) || *s == '-' || *s == '.') {
+    // Buffer into a string first, then use built-in C++ conversions
+    std::string tmp_number;
+    ValueType number_type = tInt;
 
-    else if (strncmp(s, "true", 4) == 0) {
-        s += 4;
-        mkBool(v, true);
+    while (isdigit(*s) || *s == '-' || *s == '.' || *s == 'e' || *s == 'E') {
+      if (*s == '.' || *s == 'e' || *s == 'E') number_type = tFloat;
+      tmp_number += *s++;
     }
 
-    else if (strncmp(s, "false", 5) == 0) {
-        s += 5;
-        mkBool(v, false);
+    try {
+      if (number_type == tFloat)
+        mkFloat(v, stod(tmp_number));
+      else
+        mkInt(v, stol(tmp_number));
+    } catch (std::invalid_argument& e) {
+      throw JSONParseError("invalid JSON number");
+    } catch (std::out_of_range& e) {
+      throw JSONParseError("out-of-range JSON number");
     }
+  }
 
-    else if (strncmp(s, "null", 4) == 0) {
-        s += 4;
-        mkNull(v);
-    }
+  else if (strncmp(s, "true", 4) == 0) {
+    s += 4;
+    mkBool(v, true);
+  }
 
-    else throw JSONParseError("unrecognised JSON value");
-}
+  else if (strncmp(s, "false", 5) == 0) {
+    s += 5;
+    mkBool(v, false);
+  }
 
+  else if (strncmp(s, "null", 4) == 0) {
+    s += 4;
+    mkNull(v);
+  }
 
-void parseJSON(EvalState & state, const string & s_, Value & v)
-{
-    const char * s = s_.c_str();
-    parseJSON(state, s, v);
-    skipWhitespace(s);
-    if (*s) throw JSONParseError(format("expected end-of-string while parsing JSON value: %1%") % s);
+  else
+    throw JSONParseError("unrecognised JSON value");
 }
 
-
+void parseJSON(EvalState& state, const string& s_, Value& v) {
+  const char* s = s_.c_str();
+  parseJSON(state, s, v);
+  skipWhitespace(s);
+  if (*s)
+    throw JSONParseError(
+        format("expected end-of-string while parsing JSON value: %1%") % s);
 }
+
+}  // namespace nix
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