[gawk-diffs] [SCM] gawk branch, feature/fixtype, updated. gawk-4.1.0-1864-g25b0547

[Andrew J. Schorr]

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- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=25b0547949a05839988dae236fa9a28be6573586

commit 25b0547949a05839988dae236fa9a28be6573586
Author: Andrew J. Schorr <address@hidden>
Date:   Mon Jun 27 20:36:13 2016 -0400

    Add comment to awk.h regarding the potential lack of NUL-termination for 
strings.

diff --git a/ChangeLog b/ChangeLog
index 3f3541b..24dcaf3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2016-06-27         Andrew J. Schorr     <address@hidden>
 
+       * awk.h: Add a comment regarding the potential lack of NUL-termination
+       for Node_val strings.
+
+2016-06-27         Andrew J. Schorr     <address@hidden>
+
        * node.c (r_format_val): Do not free stptr unless STRCUR is set.
        This is safer than testing for non-NULL stptr, since, for example,
        pp_number copies a node and calls r_format_val, but does not bother
diff --git a/awk.h b/awk.h
index 1d1e4fb..c737c16 100644
--- a/awk.h
+++ b/awk.h
@@ -476,6 +476,13 @@ typedef struct exp_node {
 #define re_cnt flags
 
 /* Node_val */
+/*
+ * Note that the string in stptr may not be NUL-terminated, but it is
+ * guaranteed to have at least one extra byte that may be temporarily set
+ * to '\0'. This is helpful when calling functions such as strtod that require
+ * a NUL-terminated argument. In particular, field values $n for n > 0 and
+ * n < NF will not have a NUL terminator, since they point into the $0 buffer.
+ */
 #define stptr  sub.val.sp
 #define stlen  sub.val.slen
 #define valref sub.val.sref

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog |    5 +++++
 awk.h     |    7 +++++++
 2 files changed, 12 insertions(+)


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