Merge github.com:grpc/grpc into footprints-on-the-sands-of-time

3 files changed, 56 insertions, 23 deletions

diff --git a/src/core/support/slice.c b/src/core/support/slice.c
index a2d62fc1e5..e4196a48c6 100644
--- a/src/core/support/slice.c
+++ b/src/core/support/slice.c
@@ -325,3 +325,10 @@ int gpr_slice_str_cmp(gpr_slice a, const char *b) {
   if (d != 0) return d;
   return memcmp(GPR_SLICE_START_PTR(a), b, b_length);
 }
+
+char *gpr_slice_to_cstring(gpr_slice slice) {
+  char *result = gpr_malloc(GPR_SLICE_LENGTH(slice) + 1);
+  memcpy(result, GPR_SLICE_START_PTR(slice), GPR_SLICE_LENGTH(slice));
+  result[GPR_SLICE_LENGTH(slice)] = '\0';
+  return result;
+}
diff --git a/src/core/support/string.c b/src/core/support/string.c
index 6a80ccc841..09598da946 100644
--- a/src/core/support/string.c
+++ b/src/core/support/string.c
@@ -61,14 +61,14 @@ typedef struct {
   size_t capacity;
   size_t length;
   char *data;
-} hexout;
+} dump_out;
 
-static hexout hexout_create(void) {
-  hexout r = {0, 0, NULL};
+static dump_out dump_out_create(void) {
+  dump_out r = {0, 0, NULL};
   return r;
 }
 
-static void hexout_append(hexout *out, char c) {
+static void dump_out_append(dump_out *out, char c) {
   if (out->length == out->capacity) {
     out->capacity = GPR_MAX(8, 2 * out->capacity);
     out->data = gpr_realloc(out->data, out->capacity);
@@ -76,34 +76,55 @@ static void hexout_append(hexout *out, char c) {
   out->data[out->length++] = c;
 }
 
-char *gpr_hexdump(const char *buf, size_t len, gpr_uint32 flags) {
+static void hexdump(dump_out *out, const char *buf, size_t len) {
   static const char hex[16] = "0123456789abcdef";
-  hexout out = hexout_create();
 
   const gpr_uint8 *const beg = (const gpr_uint8 *)buf;
   const gpr_uint8 *const end = beg + len;
   const gpr_uint8 *cur;
 
   for (cur = beg; cur != end; ++cur) {
-    if (cur != beg) hexout_append(&out, ' ');
-    hexout_append(&out, hex[*cur >> 4]);
-    hexout_append(&out, hex[*cur & 0xf]);
+    if (cur != beg) dump_out_append(out, ' ');
+    dump_out_append(out, hex[*cur >> 4]);
+    dump_out_append(out, hex[*cur & 0xf]);
   }
+}
 
-  if (flags & GPR_HEXDUMP_PLAINTEXT) {
-    if (len) hexout_append(&out, ' ');
-    hexout_append(&out, '\'');
-    for (cur = beg; cur != end; ++cur) {
-      hexout_append(&out, isprint(*cur) ? *(char*)cur : '.');
-    }
-    hexout_append(&out, '\'');
+static void asciidump(dump_out *out, const char *buf, size_t len) {
+  const gpr_uint8 *const beg = (const gpr_uint8 *)buf;
+  const gpr_uint8 *const end = beg + len;
+  const gpr_uint8 *cur;
+  int out_was_empty = (out->length == 0);
+  if (!out_was_empty) {
+    dump_out_append(out, ' ');
+    dump_out_append(out, '\'');
   }
+  for (cur = beg; cur != end; ++cur) {
+    dump_out_append(out, isprint(*cur) ? *(char *)cur : '.');
+  }
+  if (!out_was_empty) {
+    dump_out_append(out, '\'');
+  }
+}
 
-  hexout_append(&out, 0);
-
+char *gpr_dump(const char *buf, size_t len, gpr_uint32 flags) {
+  dump_out out = dump_out_create();
+  if (flags & GPR_DUMP_HEX) {
+    hexdump(&out, buf, len);
+  }
+  if (flags & GPR_DUMP_ASCII) {
+    asciidump(&out, buf, len);
+  }
+  dump_out_append(&out, 0);
   return out.data;
 }
 
+char *gpr_dump_slice(gpr_slice s, gpr_uint32 flags) {
+  return gpr_dump((const char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s),
+                  flags);
+}
+
+
 int gpr_parse_bytes_to_uint32(const char *buf, size_t len, gpr_uint32 *result) {
   gpr_uint32 out = 0;
   gpr_uint32 new;
diff --git a/src/core/support/string.h b/src/core/support/string.h
index 31e9fcb5e9..d950d908d6 100644
--- a/src/core/support/string.h
+++ b/src/core/support/string.h
@@ -37,6 +37,7 @@
 #include <stddef.h>
 
 #include <grpc/support/port_platform.h>
+#include <grpc/support/slice.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -44,12 +45,16 @@ extern "C" {
 
 /* String utility functions */
 
-/* flag to include plaintext after a hexdump */
-#define GPR_HEXDUMP_PLAINTEXT 0x00000001
+/* Flags for gpr_dump function. */
+#define GPR_DUMP_HEX   0x00000001
+#define GPR_DUMP_ASCII 0x00000002
 
-/* Converts array buf, of length len, into a hexadecimal dump. Result should
-   be freed with gpr_free() */
-char *gpr_hexdump(const char *buf, size_t len, gpr_uint32 flags);
+/* Converts array buf, of length len, into a C string  according to the flags.
+   Result should be freed with gpr_free() */
+char *gpr_dump(const char *buf, size_t len, gpr_uint32 flags);
+
+/* Calls gpr_dump on a slice. */
+char *gpr_dump_slice(gpr_slice slice, gpr_uint32 flags);
 
 /* Parses an array of bytes into an integer (base 10). Returns 1 on success,
    0 on failure. */