1 files changed, 315 insertions, 0 deletions
diff --git a/src/core/lib/gpr/string.cc b/src/core/lib/gpr/string.cc
new file mode 100644
index 0000000000..919d957d1b
--- /dev/null
+++ b/src/core/lib/gpr/string.cc
@@ -0,0 +1,315 @@
+/*
+ *
+ * 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/gpr/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/string_util.h>
+#include <grpc/support/useful.h>
+
+char* gpr_strdup(const char* src) {
+  char* dst;
+  size_t len;
+
+  if (!src) {
+    return nullptr;
+  }
+
+  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, nullptr};
+  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 != nullptr) {
+    *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) {
+  const char* next;
+  *strs = nullptr;
+  *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 == nullptr) return nullptr;
+  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 nullptr;
+}
+
+bool gpr_is_true(const char* s) {
+  size_t i;
+  if (s == nullptr) {
+    return false;
+  }
+  static const char* truthy[] = {"yes", "true", "1"};
+  for (i = 0; i < GPR_ARRAY_SIZE(truthy); i++) {
+    if (0 == gpr_stricmp(s, truthy[i])) {
+      return true;
+    }
+  }
+  return false;
+}