Breakpad unit tests: Add support for clipped-size null-terminated strings

to TestAssembler::Section.

This patch helps the TestAssembler classes generate Mach-O object files for
use as test input.

This patch adds a new AppendCString overloading to TestAssembler::Section
for emitting null-terminated strings in fixed-length buffers, where the
string is truncated and the terminating null character omitted if the
string is too large for the buffer.

The patch includes unit tests for the new AppendCString overloading. It
also provides some for the existing overloading, which had been neglected.

a=jimblandy, r=mark


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@590 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 9 insertions, 0 deletions

diff --git a/src/common/test_assembler.h b/src/common/test_assembler.h
index 560f7aef..19782b92 100644
--- a/src/common/test_assembler.h
+++ b/src/common/test_assembler.h
@@ -324,6 +324,15 @@ class Section {
     return *this;
   }
 
+  // Append at most SIZE bytes from DATA; if DATA is less than SIZE bytes
+  // long, pad with '\0' characters.
+  Section &AppendCString(const string &data, size_t size) {
+    contents_.append(data, 0, size);
+    if (data.size() < size)
+      Append(size - data.size(), 0);
+    return *this;
+  }
+
   // Append VALUE or LABEL to this section, with the given bit width and
   // endianness. Return a reference to this section.
   //