1 // 2 // 3 // Copyright 2015 gRPC authors. 4 // 5 // Licensed under the Apache License, Version 2.0 (the "License"); 6 // you may not use this file except in compliance with the License. 7 // You may obtain a copy of the License at 8 // 9 // http://www.apache.org/licenses/LICENSE-2.0 10 // 11 // Unless required by applicable law or agreed to in writing, software 12 // distributed under the License is distributed on an "AS IS" BASIS, 13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 // See the License for the specific language governing permissions and 15 // limitations under the License. 16 // 17 // 18 19 #ifndef GRPC_SRC_CORE_LIB_GPR_STRING_H 20 #define GRPC_SRC_CORE_LIB_GPR_STRING_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <stddef.h> 25 #include <stdint.h> 26 27 #include <string> 28 29 #include <grpc/support/time.h> 30 31 // String utility functions 32 33 // Flags for gpr_dump function. 34 #define GPR_DUMP_HEX 0x00000001 35 #define GPR_DUMP_ASCII 0x00000002 36 37 // Converts array buf, of length len, into a C string according to the flags. 38 // Result should be freed with gpr_free() 39 char* gpr_dump(const char* buf, size_t len, uint32_t flags); 40 // Converts array buf, of length len, into a C string according to the flags. 41 // The length of the returned buffer is stored in out_len. 42 // Result should be freed with gpr_free() 43 char* gpr_dump_return_len(const char* buf, size_t len, uint32_t flags, 44 size_t* out_len); 45 46 // Parses an array of bytes into an integer (base 10). Returns 1 on success, 47 // 0 on failure. 48 int gpr_parse_bytes_to_uint32(const char* buf, size_t len, uint32_t* result); 49 50 // Minimum buffer size for calling ltoa 51 #define GPR_LTOA_MIN_BUFSIZE (3 * sizeof(long)) 52 53 // Convert a long to a string in base 10; returns the length of the 54 // output string (or 0 on failure). 55 // output must be at least GPR_LTOA_MIN_BUFSIZE bytes long. 56 int gpr_ltoa(long value, char* output); 57 58 // Minimum buffer size for calling int64toa 59 #define GPR_INT64TOA_MIN_BUFSIZE (3 * sizeof(int64_t)) 60 61 // Convert an int64 to a string in base 10; returns the length of the 62 // output string (or 0 on failure). 63 // output must be at least GPR_INT64TOA_MIN_BUFSIZE bytes long. 64 // NOTE: This function ensures sufficient bit width even on Win x64, 65 // where long is 32bit is size. 66 int int64_ttoa(int64_t value, char* output); 67 68 // Parses a non-negative number from a value string. Returns -1 on error. 69 int gpr_parse_nonnegative_int(const char* value); 70 71 // Reverse a run of bytes 72 void gpr_reverse_bytes(char* str, int len); 73 74 // Pad a string with flag characters. The given length specifies the minimum 75 // field width. The input string is never truncated. 76 char* gpr_leftpad(const char* str, char flag, size_t length); 77 78 // Join a set of strings, returning the resulting string. 79 // Total combined length (excluding null terminator) is returned in final_length 80 // if it is non-null. 81 char* gpr_strjoin(const char** strs, size_t nstrs, size_t* final_length); 82 83 // Join a set of strings using a separator, returning the resulting string. 84 // Total combined length (excluding null terminator) is returned in final_length 85 // if it is non-null. 86 char* gpr_strjoin_sep(const char** strs, size_t nstrs, const char* sep, 87 size_t* final_length); 88 89 void gpr_string_split(const char* input, const char* sep, char*** strs, 90 size_t* nstrs); 91 92 // Returns a string that represents tm according to RFC-3339, and, 93 // more specifically, follows: 94 // https://developers.google.com/protocol-buffers/docs/proto3#json 95 96 // Uses RFC 3339, where generated output will always be Z-normalized and uses 97 // 0, 3, 6 or 9 fractional digits. 98 std::string gpr_format_timespec(gpr_timespec); 99 100 /// Case insensitive string comparison... return <0 if lower(a)<lower(b), ==0 if 101 /// lower(a)==lower(b), >0 if lower(a)>lower(b) 102 int gpr_stricmp(const char* a, const char* b); 103 int gpr_strincmp(const char* a, const char* b, size_t n); 104 105 void* gpr_memrchr(const void* s, int c, size_t n); 106 107 // Try to parse given string into a boolean value. 108 // When parsed successfully, dst will have the value and returns true. 109 // Otherwise, it returns false. 110 bool gpr_parse_bool_value(const char* value, bool* dst); 111 112 #endif // GRPC_SRC_CORE_LIB_GPR_STRING_H 113