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Diffstat (limited to 'scintilla/lexlib/PropSetSimple.cxx')
| -rw-r--r-- | scintilla/lexlib/PropSetSimple.cxx | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/scintilla/lexlib/PropSetSimple.cxx b/scintilla/lexlib/PropSetSimple.cxx new file mode 100644 index 0000000..9bd4e5c --- /dev/null +++ b/scintilla/lexlib/PropSetSimple.cxx @@ -0,0 +1,169 @@ +// SciTE - Scintilla based Text Editor
+/** @file PropSetSimple.cxx
+ ** A Java style properties file module.
+ **/
+// Copyright 1998-2010 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+// Maintain a dictionary of properties
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifdef _MSC_VER
+// Visual C++ doesn't like unreachable code or long decorated names in its own headers.
+#pragma warning(disable: 4018 4100 4245 4511 4512 4663 4702 4786)
+#endif
+
+#include <string>
+#include <map>
+
+#include "PropSetSimple.h"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+typedef std::map<std::string, std::string> mapss;
+
+PropSetSimple::PropSetSimple() {
+ mapss *props = new mapss;
+ impl = static_cast<void *>(props);
+}
+
+PropSetSimple::~PropSetSimple() {
+ mapss *props = static_cast<mapss *>(impl);
+ delete props;
+ impl = 0;
+}
+
+void PropSetSimple::Set(const char *key, const char *val, int lenKey, int lenVal) {
+ mapss *props = static_cast<mapss *>(impl);
+ if (!*key) // Empty keys are not supported
+ return;
+ if (lenKey == -1)
+ lenKey = static_cast<int>(strlen(key));
+ if (lenVal == -1)
+ lenVal = static_cast<int>(strlen(val));
+ (*props)[std::string(key, lenKey)] = std::string(val, lenVal);
+}
+
+static bool IsASpaceCharacter(unsigned int ch) {
+ return (ch == ' ') || ((ch >= 0x09) && (ch <= 0x0d));
+}
+
+void PropSetSimple::Set(const char *keyVal) {
+ while (IsASpaceCharacter(*keyVal))
+ keyVal++;
+ const char *endVal = keyVal;
+ while (*endVal && (*endVal != '\n'))
+ endVal++;
+ const char *eqAt = strchr(keyVal, '=');
+ if (eqAt) {
+ Set(keyVal, eqAt + 1, eqAt-keyVal, endVal - eqAt - 1);
+ } else if (*keyVal) { // No '=' so assume '=1'
+ Set(keyVal, "1", endVal-keyVal, 1);
+ }
+}
+
+void PropSetSimple::SetMultiple(const char *s) {
+ const char *eol = strchr(s, '\n');
+ while (eol) {
+ Set(s);
+ s = eol + 1;
+ eol = strchr(s, '\n');
+ }
+ Set(s);
+}
+
+const char *PropSetSimple::Get(const char *key) const {
+ mapss *props = static_cast<mapss *>(impl);
+ mapss::const_iterator keyPos = props->find(std::string(key));
+ if (keyPos != props->end()) {
+ return keyPos->second.c_str();
+ } else {
+ return "";
+ }
+}
+
+// There is some inconsistency between GetExpanded("foo") and Expand("$(foo)").
+// A solution is to keep a stack of variables that have been expanded, so that
+// recursive expansions can be skipped. For now I'll just use the C++ stack
+// for that, through a recursive function and a simple chain of pointers.
+
+struct VarChain {
+ VarChain(const char *var_=NULL, const VarChain *link_=NULL): var(var_), link(link_) {}
+
+ bool contains(const char *testVar) const {
+ return (var && (0 == strcmp(var, testVar)))
+ || (link && link->contains(testVar));
+ }
+
+ const char *var;
+ const VarChain *link;
+};
+
+static int ExpandAllInPlace(const PropSetSimple &props, std::string &withVars, int maxExpands, const VarChain &blankVars) {
+ size_t varStart = withVars.find("$(");
+ while ((varStart != std::string::npos) && (maxExpands > 0)) {
+ size_t varEnd = withVars.find(")", varStart+2);
+ if (varEnd == std::string::npos) {
+ break;
+ }
+
+ // For consistency, when we see '$(ab$(cde))', expand the inner variable first,
+ // regardless whether there is actually a degenerate variable named 'ab$(cde'.
+ size_t innerVarStart = withVars.find("$(", varStart+2);
+ while ((innerVarStart != std::string::npos) && (innerVarStart > varStart) && (innerVarStart < varEnd)) {
+ varStart = innerVarStart;
+ innerVarStart = withVars.find("$(", varStart+2);
+ }
+
+ std::string var(withVars.c_str(), varStart + 2, varEnd - varStart - 2);
+ std::string val = props.Get(var.c_str());
+
+ if (blankVars.contains(var.c_str())) {
+ val = ""; // treat blankVar as an empty string (e.g. to block self-reference)
+ }
+
+ if (--maxExpands >= 0) {
+ maxExpands = ExpandAllInPlace(props, val, maxExpands, VarChain(var.c_str(), &blankVars));
+ }
+
+ withVars.erase(varStart, varEnd-varStart+1);
+ withVars.insert(varStart, val.c_str(), val.length());
+
+ varStart = withVars.find("$(");
+ }
+
+ return maxExpands;
+}
+
+char *PropSetSimple::Expanded(const char *key) const {
+ std::string val = Get(key);
+ ExpandAllInPlace(*this, val, 100, VarChain(key));
+ char *ret = new char [val.size() + 1];
+ strcpy(ret, val.c_str());
+ return ret;
+}
+
+int PropSetSimple::GetExpanded(const char *key, char *result) const {
+ char *val = Expanded(key);
+ const int n = strlen(val);
+ if (result) {
+ strcpy(result, val);
+ }
+ delete []val;
+ return n; // Not including NUL
+}
+
+int PropSetSimple::GetInt(const char *key, int defaultValue) const {
+ char *val = Expanded(key);
+ if (val) {
+ int retVal = val[0] ? atoi(val) : defaultValue;
+ delete []val;
+ return retVal;
+ }
+ return defaultValue;
+}
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