Initial checkin of gRPC to third_party/

third_party/grpc/src/core/support/string.h

Index: third_party/grpc/src/core/support/string.h
diff --git a/third_party/grpc/src/core/support/string.h b/third_party/grpc/src/core/support/string.h
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+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CORE_SUPPORT_STRING_H
+#define GRPC_INTERNAL_CORE_SUPPORT_STRING_H
+
+#include <stddef.h>
+
+#include <grpc/support/port_platform.h>
+#include <grpc/support/slice_buffer.h>
+#include <grpc/support/slice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* String utility functions */
+
+/* Flags for gpr_dump function. */
+#define GPR_DUMP_HEX 0x00000001
+#define GPR_DUMP_ASCII 0x00000002
+
+/* 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, uint32_t flags);
+
+/* Calls gpr_dump on a slice. */
+char *gpr_dump_slice(gpr_slice slice, uint32_t flags);
+
+/* Parses an array of bytes into an integer (base 10). Returns 1 on success,
+   0 on failure. */
+int gpr_parse_bytes_to_uint32(const char *data, size_t length,
+                              uint32_t *result);
+
+/* Minimum buffer size for calling ltoa */
+#define GPR_LTOA_MIN_BUFSIZE (3 * sizeof(long))
+
+/* Convert a long to a string in base 10; returns the length of the
+   output string (or 0 on failure).
+   output must be at least GPR_LTOA_MIN_BUFSIZE bytes long. */
+int gpr_ltoa(long value, char *output);
+
+/* Minimum buffer size for calling int64toa */
+#define GPR_INT64TOA_MIN_BUFSIZE (3 * sizeof(int64_t))
+
+/* Convert an int64 to a string in base 10; returns the length of the
+output string (or 0 on failure).
+output must be at least GPR_INT64TOA_MIN_BUFSIZE bytes long.
+NOTE: This function ensures sufficient bit width even on Win x64,
+where long is 32bit is size.*/
+int int64_ttoa(int64_t value, char *output);
+
+/* Reverse a run of bytes */
+void gpr_reverse_bytes(char *str, int len);
+
+/* Join a set of strings, returning the resulting string.
+   Total combined length (excluding null terminator) is returned in total_length
+   if it is non-null. */
+char *gpr_strjoin(const char **strs, size_t nstrs, size_t *total_length);
+
+/* Join a set of strings using a separator, returning the resulting string.
+   Total combined length (excluding null terminator) is returned in total_length
+   if it is non-null. */
+char *gpr_strjoin_sep(const char **strs, size_t nstrs, const char *sep,
+                      size_t *total_length);
+
+/** Split \a str by the separator \a sep. Results are stored in \a dst, which
+ * should be a properly initialized instance. */
+void gpr_slice_split(gpr_slice str, const char *sep, gpr_slice_buffer *dst);
+
+/* A vector of strings... for building up a final string one piece at a time */
+typedef struct {
+  char **strs;
+  size_t count;
+  size_t capacity;
+} gpr_strvec;
+
+/* Initialize/destroy */
+void gpr_strvec_init(gpr_strvec *strs);
+void gpr_strvec_destroy(gpr_strvec *strs);
+/* Add a string to a strvec, takes ownership of the string */
+void gpr_strvec_add(gpr_strvec *strs, char *add);
+/* Return a joined string with all added substrings, optionally setting
+   total_length as per gpr_strjoin */
+char *gpr_strvec_flatten(gpr_strvec *strs, size_t *total_length);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_INTERNAL_CORE_SUPPORT_STRING_H */