Add memBEGINPs() to core and use it

This macro is like memBEGINs(), but the 'P' signifies we want a proper
substring, meaning that the 2nd string parameter must not be the entire
first parameter.

1 files changed, 3 insertions, 0 deletions

diff --git a/handy.h b/handy.h
index 06db1e25a6..7b5aeb84fe 100644
--- a/handy.h
+++ b/handy.h
@@ -495,6 +495,9 @@ Returns zero if non-equal, or non-zero if equal.
 #define memBEGINs(s1, l, s2)                                                \
             (   (l) >= sizeof(s2) - 1                                       \
              && memEQ(s1, "" s2 "", sizeof(s2)-1))
+#define memBEGINPs(s1, l, s2)                                               \
+            (   (l) > sizeof(s2) - 1                                        \
+             && memEQ(s1, "" s2 "", sizeof(s2)-1))
 #define memENDs(s1, l, s2)                                                  \
             (   (l) >= sizeof(s2) - 1                                       \
              && memEQ(s1 + (l) - (sizeof(s2) - 1), "" s2 "", sizeof(s2)-1))