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Diffstat (limited to 'src/core/lib/gpr/string.h')
-rw-r--r-- | src/core/lib/gpr/string.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/core/lib/gpr/string.h b/src/core/lib/gpr/string.h new file mode 100644 index 0000000000..ef3a8c6086 --- /dev/null +++ b/src/core/lib/gpr/string.h @@ -0,0 +1,109 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +#ifndef GRPC_CORE_LIB_GPR_STRING_H +#define GRPC_CORE_LIB_GPR_STRING_H + +#include <stdbool.h> +#include <stddef.h> + +#include <grpc/support/port_platform.h> + +/* 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); + +/* 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); + +// Parses a non-negative number from a value string. Returns -1 on error. +int gpr_parse_nonnegative_int(const char* value); + +/* Reverse a run of bytes */ +void gpr_reverse_bytes(char* str, int len); + +/* Pad a string with flag characters. The given length specifies the minimum + field width. The input string is never truncated. */ +char* gpr_leftpad(const char* str, char flag, size_t length); + +/* 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); + +void gpr_string_split(const char* input, const char* sep, char*** strs, + size_t* nstrs); + +/* 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); + +/** Case insensitive string comparison... return <0 if lower(a)<lower(b), ==0 if + lower(a)==lower(b), >0 if lower(a)>lower(b) */ +int gpr_stricmp(const char* a, const char* b); + +void* gpr_memrchr(const void* s, int c, size_t n); + +/** Return true if lower(s) equals "true", "yes" or "1", otherwise false. */ +bool gpr_is_true(const char* s); + +#endif /* GRPC_CORE_LIB_GPR_STRING_H */ |