| /* |
| * |
| * 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. |
| * |
| */ |
| |
| #include "src/core/lib/support/string.h" |
| |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/port_platform.h> |
| #include <grpc/support/useful.h> |
| |
| char *gpr_strdup(const char *src) { |
| char *dst; |
| size_t len; |
| |
| if (!src) { |
| return NULL; |
| } |
| |
| len = strlen(src) + 1; |
| dst = (char *)gpr_malloc(len); |
| |
| memcpy(dst, src, len); |
| |
| return dst; |
| } |
| |
| typedef struct { |
| size_t capacity; |
| size_t length; |
| char *data; |
| } dump_out; |
| |
| static dump_out dump_out_create(void) { |
| dump_out r = {0, 0, NULL}; |
| return r; |
| } |
| |
| 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 = (char *)gpr_realloc(out->data, out->capacity); |
| } |
| out->data[out->length++] = c; |
| } |
| |
| static void hexdump(dump_out *out, const char *buf, size_t len) { |
| static const char *hex = "0123456789abcdef"; |
| |
| const uint8_t *const beg = (const uint8_t *)buf; |
| const uint8_t *const end = beg + len; |
| const uint8_t *cur; |
| |
| for (cur = beg; cur != end; ++cur) { |
| if (cur != beg) dump_out_append(out, ' '); |
| dump_out_append(out, hex[*cur >> 4]); |
| dump_out_append(out, hex[*cur & 0xf]); |
| } |
| } |
| |
| static void asciidump(dump_out *out, const char *buf, size_t len) { |
| const uint8_t *const beg = (const uint8_t *)buf; |
| const uint8_t *const end = beg + len; |
| const uint8_t *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, (char)(isprint(*cur) ? *(char *)cur : '.')); |
| } |
| if (!out_was_empty) { |
| dump_out_append(out, '\''); |
| } |
| } |
| |
| char *gpr_dump(const char *buf, size_t len, uint32_t 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; |
| } |
| |
| int gpr_parse_bytes_to_uint32(const char *buf, size_t len, uint32_t *result) { |
| uint32_t out = 0; |
| uint32_t new_val; |
| size_t i; |
| |
| if (len == 0) return 0; /* must have some bytes */ |
| |
| for (i = 0; i < len; i++) { |
| if (buf[i] < '0' || buf[i] > '9') return 0; /* bad char */ |
| new_val = 10 * out + (uint32_t)(buf[i] - '0'); |
| if (new_val < out) return 0; /* overflow */ |
| out = new_val; |
| } |
| |
| *result = out; |
| return 1; |
| } |
| |
| void gpr_reverse_bytes(char *str, int len) { |
| char *p1, *p2; |
| for (p1 = str, p2 = str + len - 1; p2 > p1; ++p1, --p2) { |
| char temp = *p1; |
| *p1 = *p2; |
| *p2 = temp; |
| } |
| } |
| |
| int gpr_ltoa(long value, char *string) { |
| long sign; |
| int i = 0; |
| |
| if (value == 0) { |
| string[0] = '0'; |
| string[1] = 0; |
| return 1; |
| } |
| |
| sign = value < 0 ? -1 : 1; |
| while (value) { |
| string[i++] = (char)('0' + sign * (value % 10)); |
| value /= 10; |
| } |
| if (sign < 0) string[i++] = '-'; |
| gpr_reverse_bytes(string, i); |
| string[i] = 0; |
| return i; |
| } |
| |
| int int64_ttoa(int64_t value, char *string) { |
| int64_t sign; |
| int i = 0; |
| |
| if (value == 0) { |
| string[0] = '0'; |
| string[1] = 0; |
| return 1; |
| } |
| |
| sign = value < 0 ? -1 : 1; |
| while (value) { |
| string[i++] = (char)('0' + sign * (value % 10)); |
| value /= 10; |
| } |
| if (sign < 0) string[i++] = '-'; |
| gpr_reverse_bytes(string, i); |
| string[i] = 0; |
| return i; |
| } |
| |
| int gpr_parse_nonnegative_int(const char *value) { |
| char *end; |
| long result = strtol(value, &end, 0); |
| if (*end != '\0' || result < 0 || result > INT_MAX) return -1; |
| return (int)result; |
| } |
| |
| char *gpr_leftpad(const char *str, char flag, size_t length) { |
| const size_t str_length = strlen(str); |
| const size_t out_length = str_length > length ? str_length : length; |
| char *out = (char *)gpr_malloc(out_length + 1); |
| memset(out, flag, out_length - str_length); |
| memcpy(out + out_length - str_length, str, str_length); |
| out[out_length] = 0; |
| return out; |
| } |
| |
| char *gpr_strjoin(const char **strs, size_t nstrs, size_t *final_length) { |
| return gpr_strjoin_sep(strs, nstrs, "", final_length); |
| } |
| |
| char *gpr_strjoin_sep(const char **strs, size_t nstrs, const char *sep, |
| size_t *final_length) { |
| const size_t sep_len = strlen(sep); |
| size_t out_length = 0; |
| size_t i; |
| char *out; |
| for (i = 0; i < nstrs; i++) { |
| out_length += strlen(strs[i]); |
| } |
| out_length += 1; /* null terminator */ |
| if (nstrs > 0) { |
| out_length += sep_len * (nstrs - 1); /* separators */ |
| } |
| out = (char *)gpr_malloc(out_length); |
| out_length = 0; |
| for (i = 0; i < nstrs; i++) { |
| const size_t slen = strlen(strs[i]); |
| if (i != 0) { |
| memcpy(out + out_length, sep, sep_len); |
| out_length += sep_len; |
| } |
| memcpy(out + out_length, strs[i], slen); |
| out_length += slen; |
| } |
| out[out_length] = 0; |
| if (final_length != NULL) { |
| *final_length = out_length; |
| } |
| return out; |
| } |
| |
| void gpr_strvec_init(gpr_strvec *sv) { memset(sv, 0, sizeof(*sv)); } |
| |
| void gpr_strvec_destroy(gpr_strvec *sv) { |
| size_t i; |
| for (i = 0; i < sv->count; i++) { |
| gpr_free(sv->strs[i]); |
| } |
| gpr_free(sv->strs); |
| } |
| |
| void gpr_strvec_add(gpr_strvec *sv, char *str) { |
| if (sv->count == sv->capacity) { |
| sv->capacity = GPR_MAX(sv->capacity + 8, sv->capacity * 2); |
| sv->strs = (char **)gpr_realloc(sv->strs, sizeof(char *) * sv->capacity); |
| } |
| sv->strs[sv->count++] = str; |
| } |
| |
| char *gpr_strvec_flatten(gpr_strvec *sv, size_t *final_length) { |
| return gpr_strjoin((const char **)sv->strs, sv->count, final_length); |
| } |
| |
| int gpr_stricmp(const char *a, const char *b) { |
| int ca, cb; |
| do { |
| ca = tolower(*a); |
| cb = tolower(*b); |
| ++a; |
| ++b; |
| } while (ca == cb && ca && cb); |
| return ca - cb; |
| } |
| |
| static void add_string_to_split(const char *beg, const char *end, char ***strs, |
| size_t *nstrs, size_t *capstrs) { |
| char *out = (char *)gpr_malloc((size_t)(end - beg) + 1); |
| memcpy(out, beg, (size_t)(end - beg)); |
| out[end - beg] = 0; |
| if (*nstrs == *capstrs) { |
| *capstrs = GPR_MAX(8, 2 * *capstrs); |
| *strs = (char **)gpr_realloc(*strs, sizeof(*strs) * *capstrs); |
| } |
| (*strs)[*nstrs] = out; |
| ++*nstrs; |
| } |
| |
| void gpr_string_split(const char *input, const char *sep, char ***strs, |
| size_t *nstrs) { |
| char *next; |
| *strs = NULL; |
| *nstrs = 0; |
| size_t capstrs = 0; |
| while ((next = strstr(input, sep))) { |
| add_string_to_split(input, next, strs, nstrs, &capstrs); |
| input = next + strlen(sep); |
| } |
| add_string_to_split(input, input + strlen(input), strs, nstrs, &capstrs); |
| } |
| |
| void *gpr_memrchr(const void *s, int c, size_t n) { |
| if (s == NULL) return NULL; |
| char *b = (char *)s; |
| size_t i; |
| for (i = 0; i < n; i++) { |
| if (b[n - i - 1] == c) { |
| return &b[n - i - 1]; |
| } |
| } |
| return NULL; |
| } |
| |
| bool gpr_is_true(const char *s) { |
| if (s == NULL) { |
| return false; |
| } |
| static const char *truthy[] = {"yes", "true", "1"}; |
| for (size_t i = 0; i < GPR_ARRAY_SIZE(truthy); i++) { |
| if (0 == gpr_stricmp(s, truthy[i])) { |
| return true; |
| } |
| } |
| return false; |
| } |