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/*
*
* Copyright 2014, 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.
*
*/
#include <grpc/support/string.h>
#include <ctype.h>
#include <stddef.h>
#include <string.h>
#include <grpc/support/alloc.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 = gpr_malloc(len);
memcpy(dst, src, len);
return dst;
}
typedef struct {
size_t capacity;
size_t length;
char *data;
} hexout;
static hexout hexout_create() {
hexout r = {0, 0, NULL};
return r;
}
static void hexout_append(hexout *out, char c) {
if (out->length == out->capacity) {
out->capacity = GPR_MAX(8, 2 * out->capacity);
out->data = gpr_realloc(out->data, out->capacity);
}
out->data[out->length++] = c;
}
char *gpr_hexdump(const char *buf, size_t len, gpr_uint32 flags) {
static const char hex[16] = "0123456789abcdef";
hexout out = hexout_create();
const gpr_uint8 *const beg = (const gpr_uint8 *)buf;
const gpr_uint8 *const end = beg + len;
const gpr_uint8 *cur;
for (cur = beg; cur != end; ++cur) {
if (cur != beg) hexout_append(&out, ' ');
hexout_append(&out, hex[*cur >> 4]);
hexout_append(&out, hex[*cur & 0xf]);
}
if (flags & GPR_HEXDUMP_PLAINTEXT) {
cur = beg;
if (len) hexout_append(&out, ' ');
hexout_append(&out, '\'');
for (cur = beg; cur != end; ++cur) {
hexout_append(&out, isprint(*cur) ? *cur : '.');
}
hexout_append(&out, '\'');
}
hexout_append(&out, 0);
return out.data;
}
int gpr_parse_bytes_to_uint32(const char *buf, size_t len, gpr_uint32 *result) {
gpr_uint32 out = 0;
gpr_uint32 new;
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 = 10 * out + (buf[i] - '0');
if (new < out) return 0; /* overflow */
out = new;
}
*result = out;
return 1;
}
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