v01

thirdparty/Pangolin/include/pangolin/utils/parse.h

@@ -0,0 +1,108 @@
+/* This file is part of the Pangolin Project.
+ * http://github.com/stevenlovegrove/Pangolin
+ *
+ * Copyright (c) 2014 Steven Lovegrove
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PANGOLIN_PARSE_H
+#define PANGOLIN_PARSE_H
+
+#include <string>
+#include <cctype>
+
+namespace pangolin
+{
+
+const unsigned int parse_max_token_size = 1024;
+
+inline void ConsumeWhitespace(std::istream& is)
+{
+    while(is.good() && std::isspace(is.peek()) ) {
+        is.get();
+    }
+}
+
+inline bool ConsumeToNewline(std::istream& is)
+{
+    while(is.good()) {
+        if(is.get() == '\n') {
+            return true;
+        }
+    }
+    return false;
+}
+
+template<size_t buffer_size> inline
+size_t ReadToken(std::istream& is, char buffer[buffer_size])
+{
+    size_t r = 0;
+    while(is.good() && r < buffer_size-1) {
+        int c = is.peek();
+        if( std::isgraph(c) ) {
+            buffer[r++] = (char)is.get();
+        }else{
+            break;
+        }
+    }
+    buffer[r] = '\0';
+    return r;
+}
+
+inline std::string ReadToken(std::istream &is)
+{
+    char str_token[parse_max_token_size];
+    ReadToken<parse_max_token_size>(is, str_token);
+    return std::string(str_token);
+}
+
+template<size_t buffer_size> inline
+size_t ConsumeWhitespaceReadToken(std::istream& is, char buffer[buffer_size])
+{
+    ConsumeWhitespace(is);
+    return ReadToken<buffer_size>(is, buffer);
+}
+
+inline int ParseToken(const char* token, const char* token_list[], size_t token_list_size)
+{
+    for(size_t i=0; i < token_list_size; ++i) {
+        if( strcmp(token, token_list[i]) == 0 ) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+#define PANGOLIN_DEFINE_PARSE_TOKEN(x) \
+    inline x ParseToken##x(const char* token) { \
+        return (x)ParseToken(token, x##String, x##Size); \
+    } \
+    inline x ParseToken##x(std::istream& is) { \
+        char str_token[parse_max_token_size]; \
+        ReadToken<parse_max_token_size>(is, str_token); \
+        return ParseToken##x( str_token ); \
+    }
+
+}
+
+#endif // PANGOLIN_PARSE_H