256 lines
6.5 KiB
C
256 lines
6.5 KiB
C
/*
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* Copyright (c) 2015, NVIDIA CORPORATION.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and/or associated documentation files (the
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* "Materials"), to deal in the Materials without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Materials, and to
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* permit persons to whom the Materials are furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* unaltered in all copies or substantial portions of the Materials.
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* Any additions, deletions, or changes to the original source files
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* must be clearly indicated in accompanying documentation.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#include "utils_misc.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <assert.h>
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int glvnd_asprintf(char **strp, const char *fmt, ...)
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{
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va_list args;
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int ret;
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va_start(args, fmt);
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ret = glvnd_vasprintf(strp, fmt, args);
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va_end(args);
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return ret;
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}
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int glvnd_vasprintf(char **strp, const char *fmt, va_list args)
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{
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static const int GLVND_ASPRINTF_BUF_LEN = 256;
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char *str = NULL;
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int ret = -1;
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if (fmt) {
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va_list ap;
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int len, current_len = GLVND_ASPRINTF_BUF_LEN;
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while (1) {
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str = malloc(current_len);
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if (str == NULL) {
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break;
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}
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va_copy(ap, args);
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len = vsnprintf(str, current_len, fmt, ap);
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va_end(ap);
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// If the buffer isn't large enough, then vsnprintf will either
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// return -1 (for glibc < 2.1) or the number of bytes the buffer
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// needs to be (for glibc >= 2.1).
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if ((len > -1) && (len < current_len)) {
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ret = len;
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break;
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} else if (len > -1) {
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current_len = len + 1;
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} else {
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current_len += GLVND_ASPRINTF_BUF_LEN;
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}
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free(str);
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}
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}
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*strp = str;
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return ret;
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}
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void glvnd_byte_swap16(uint16_t* array, const size_t size)
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{
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int i;
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assert((size % 2) == 0);
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for (i = 0; i < size / 2; i++) {
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array[i] = (array[i] << 8) | (array[i] >> 8);
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}
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}
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int FindNextStringToken(const char **tok, size_t *len, const char *sep)
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{
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// Skip to the end of the current name.
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const char *ptr = *tok + *len;
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// Skip any leading separators.
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while (*ptr != '\x00' && strchr(sep, *ptr) != NULL) {
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ptr++;
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}
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// Find the length of the current token.
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*len = 0;
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while (ptr[*len] != '\x00' && strchr(sep, ptr[*len]) == NULL) {
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(*len)++;
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}
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*tok = ptr;
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return (*len > 0 ? 1 : 0);
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}
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char **SplitString(const char *str, size_t *count, const char *sep)
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{
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char **tokens = NULL;
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char *tokenBuf;
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size_t tokenCount = 0;
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size_t totalLen = 0;
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const char *tok;
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size_t len;
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if (count != NULL) {
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*count = 0;
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}
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tok = str;
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len = 0;
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while (FindNextStringToken(&tok, &len, sep)) {
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tokenCount++;
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totalLen += len + 1;
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}
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if (tokenCount == 0) {
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return NULL;
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}
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tokens = (char **) malloc((tokenCount + 1) * sizeof(char *)
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+ totalLen);
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if (tokens == NULL) {
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return NULL;
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}
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tokenBuf = (char *) (tokens + tokenCount + 1);
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tok = str;
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len = 0;
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tokenCount = 0;
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while (FindNextStringToken(&tok, &len, sep)) {
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memcpy(tokenBuf, tok, len);
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tokenBuf[len] = '\x00';
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tokens[tokenCount++] = tokenBuf;
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tokenBuf += len + 1;
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}
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tokens[tokenCount] = NULL;
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if (count != NULL) {
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*count = tokenCount;
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}
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return tokens;
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}
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int IsTokenInString(const char *str, const char *token, size_t tokenLen, const char *sep)
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{
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const char *ptr = str;
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size_t len = 0;
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while (FindNextStringToken(&ptr, &len, sep)) {
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if (tokenLen == len && strncmp(token, ptr, len) == 0) {
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return 1;
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}
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}
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return 0;
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}
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char *UnionExtensionStrings(char *currentString, const char *newString)
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{
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size_t origLen;
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size_t newLen;
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const char *token;
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size_t tokenLen;
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char *buf, *ptr;
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// Calculate the length of the new string.
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origLen = newLen = strlen(currentString);
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// The code below assumes that currentString is not empty, so if it is
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// empty, then just copy the new string.
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if (origLen == 0) {
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buf = currentString;
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if (newString[0] != '\0') {
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buf = strdup(newString);
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free(currentString);
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}
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return buf;
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}
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token = newString;
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tokenLen = 0;
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while (FindNextStringToken(&token, &tokenLen, " ")) {
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if (!IsTokenInString(currentString, token, tokenLen, " ")) {
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newLen += tokenLen + 1;
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}
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}
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if (origLen == newLen) {
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// No new extensions to add.
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return currentString;
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}
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buf = (char *) realloc(currentString, newLen + 1);
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if (buf == NULL) {
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free(currentString);
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return NULL;
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}
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currentString = NULL;
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ptr = buf + origLen;
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token = newString;
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tokenLen = 0;
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while (FindNextStringToken(&token, &tokenLen, " ")) {
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if (!IsTokenInString(buf, token, tokenLen, " ")) {
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*ptr++ = ' ';
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memcpy(ptr, token, tokenLen);
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ptr += tokenLen;
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*ptr = '\0';
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}
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}
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assert((size_t) (ptr - buf) == newLen);
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return buf;
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}
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void IntersectionExtensionStrings(char *currentString, const char *newString)
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{
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const char *token;
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size_t tokenLen;
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char *ptr;
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token = currentString;
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tokenLen = 0;
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ptr = currentString;
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while(FindNextStringToken(&token, &tokenLen, " ")) {
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if (IsTokenInString(newString, token, tokenLen, " ")) {
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if (ptr != currentString) {
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*ptr++ = ' ';
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}
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memmove(ptr, token, tokenLen);
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ptr += tokenLen;
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}
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}
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*ptr = '\0';
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}
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