From 4518ea95408e2d5fe90a87159b88bb41734ec1dc Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Tue, 29 Jul 2008 05:10:16 -0400
Subject: Value expression architecture is now rewritten, but the functionality
 of the old system (for example, the meaning of 'a') has yet to be restored. 
 In the new scheme, this will be done by definition a function outside of the
 value expression logic, rather than the tight coupling between journal
 innards and value expressions that occurred in 2.x.

---
 utils.h | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

(limited to 'utils.h')

diff --git a/utils.h b/utils.h
index 51983d03..05a214a7 100644
--- a/utils.h
+++ b/utils.h
@@ -539,6 +539,80 @@ inline const string& either_or(const string& first,
   return first.empty() ? second : first;
 }
 
+inline char * skip_ws(char * ptr) {
+  while (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')
+    ptr++;
+  return ptr;
+}
+
+inline char * next_element(char * buf, bool variable = false) {
+  for (char * p = buf; *p; p++) {
+    if (! (*p == ' ' || *p == '\t'))
+      continue;
+
+    if (! variable) {
+      *p = '\0';
+      return skip_ws(p + 1);
+    }
+    else if (*p == '\t') {
+      *p = '\0';
+      return skip_ws(p + 1);
+    }
+    else if (*(p + 1) == ' ') {
+      *p = '\0';
+      return skip_ws(p + 2);
+    }
+  }
+  return NULL;
+}
+
+inline char peek_next_nonws(std::istream& in) {
+  char c = in.peek();
+  while (! in.eof() && std::isspace(c)) {
+    in.get(c);
+    c = in.peek();
+  }
+  return c;
+}
+
+#define READ_INTO(str, targ, size, var, cond) {				\
+  char * _p = targ;							\
+  var = str.peek();							\
+  while (! str.eof() && var != '\n' && (cond) && _p - targ < size) {	\
+    str.get(var);							\
+    if (str.eof())							\
+      break;								\
+    if (var == '\\') {							\
+      str.get(var);							\
+      if (in.eof())							\
+	break;								\
+    }									\
+    *_p++ = var;							\
+    var = str.peek();							\
+  }									\
+  *_p = '\0';								\
+}
+
+#define READ_INTO_(str, targ, size, var, idx, cond) {			\
+  char * _p = targ;							\
+  var = str.peek();							\
+  while (! str.eof() && var != '\n' && (cond) && _p - targ < size) {	\
+    str.get(var);							\
+    if (str.eof())							\
+      break;								\
+    idx++;								\
+    if (var == '\\') {							\
+      str.get(var);							\
+      if (in.eof())							\
+	break;								\
+      idx++;								\
+    }									\
+    *_p++ = var;							\
+    var = str.peek();							\
+  }									\
+  *_p = '\0';								\
+}
+
 } // namespace ledger
 
 #endif // _UTILS_H
-- 
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