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/*
* utils.c
* Miscellaneous utilities for string manipulation,
* file I/O and plist helper.
*
* Copyright (c) 2014-2019 Nikias Bassen, All Rights Reserved.
* Copyright (c) 2013-2014 Martin Szulecki, All Rights Reserved.
* Copyright (c) 2013 Federico Mena Quintero
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <inttypes.h>
#include <ctype.h>
#include "utils.h"
#ifndef HAVE_STPCPY
/**
* Copy characters from one string into another
*
* @note: The strings should not overlap, as the behavior is undefined.
*
* @s1: The source string.
* @s2: The destination string.
*
* @return a pointer to the terminating `\0' character of @s1,
* or NULL if @s1 or @s2 is NULL.
*/
char *stpcpy(char *s1, const char *s2)
{
if (s1 == NULL || s2 == NULL)
return NULL;
strcpy(s1, s2);
return s1 + strlen(s2);
}
#endif
/**
* Concatenate strings into a newly allocated string
*
* @note: Specify NULL for the last string in the varargs list
*
* @str: The first string in the list
* @...: Subsequent strings. Use NULL for the last item.
*
* @return a newly allocated string, or NULL if @str is NULL. This will also
* return NULL and set errno to ENOMEM if memory is exhausted.
*/
char *string_concat(const char *str, ...)
{
size_t len;
va_list args;
char *s;
char *result;
char *dest;
if (!str)
return NULL;
/* Compute final length */
len = strlen(str) + 1; /* plus 1 for the null terminator */
va_start(args, str);
s = va_arg(args, char *);
while (s) {
len += strlen(s);
s = va_arg(args, char*);
}
va_end(args);
/* Concat each string */
result = malloc(len);
if (!result)
return NULL; /* errno remains set */
dest = result;
dest = stpcpy(dest, str);
va_start(args, str);
s = va_arg(args, char *);
while (s) {
dest = stpcpy(dest, s);
s = va_arg(args, char *);
}
va_end(args);
return result;
}
char *string_append(char* str, ...)
{
size_t len = 0;
size_t slen;
va_list args;
char *s;
char *result;
char *dest;
/* Compute final length */
if (str) {
len = strlen(str);
}
slen = len;
len++; /* plus 1 for the null terminator */
va_start(args, str);
s = va_arg(args, char *);
while (s) {
len += strlen(s);
s = va_arg(args, char*);
}
va_end(args);
result = realloc(str, len);
if (!result)
return NULL; /* errno remains set */
dest = result + slen;
/* Concat additional strings */
va_start(args, str);
s = va_arg(args, char *);
while (s) {
dest = stpcpy(dest, s);
s = va_arg(args, char *);
}
va_end(args);
return result;
}
char *string_build_path(const char *elem, ...)
{
if (!elem)
return NULL;
va_list args;
int len = strlen(elem)+1;
va_start(args, elem);
char *arg = va_arg(args, char*);
while (arg) {
len += strlen(arg)+1;
arg = va_arg(args, char*);
}
va_end(args);
char* out = (char*)malloc(len);
strcpy(out, elem);
va_start(args, elem);
arg = va_arg(args, char*);
while (arg) {
strcat(out, "/");
strcat(out, arg);
arg = va_arg(args, char*);
}
va_end(args);
return out;
}
char *string_format_size(uint64_t size)
{
char buf[80];
double sz;
if (size >= 1000000000000LL) {
sz = ((double)size / 1000000000000.0f);
sprintf(buf, "%0.1f TB", sz);
} else if (size >= 1000000000LL) {
sz = ((double)size / 1000000000.0f);
sprintf(buf, "%0.1f GB", sz);
} else if (size >= 1000000LL) {
sz = ((double)size / 1000000.0f);
sprintf(buf, "%0.1f MB", sz);
} else if (size >= 1000LL) {
sz = ((double)size / 1000.0f);
sprintf(buf, "%0.1f KB", sz);
} else {
sprintf(buf, "%d Bytes", (int)size);
}
return strdup(buf);
}
char *string_toupper(char* str)
{
char *res = strdup(str);
unsigned int i;
for (i = 0; i < strlen(res); i++) {
res[i] = toupper(res[i]);
}
return res;
}
static int get_rand(int min, int max)
{
int retval = (rand() % (max - min)) + min;
return retval;
}
char *generate_uuid()
{
const char *chars = "ABCDEF0123456789";
int i = 0;
char *uuid = (char *) malloc(sizeof(char) * 37);
srand(time(NULL));
for (i = 0; i < 36; i++) {
if (i == 8 || i == 13 || i == 18 || i == 23) {
uuid[i] = '-';
continue;
} else {
uuid[i] = chars[get_rand(0, 16)];
}
}
/* make it a real string */
uuid[36] = '\0';
return uuid;
}
void buffer_read_from_filename(const char *filename, char **buffer, uint64_t *length)
{
FILE *f;
uint64_t size;
*length = 0;
f = fopen(filename, "rb");
if (!f) {
return;
}
fseek(f, 0, SEEK_END);
size = ftell(f);
rewind(f);
if (size == 0) {
fclose(f);
return;
}
*buffer = (char*)malloc(sizeof(char)*(size+1));
if (fread(*buffer, sizeof(char), size, f) != size) {
fclose(f);
return;
}
fclose(f);
*length = size;
}
void buffer_write_to_filename(const char *filename, const char *buffer, uint64_t length)
{
FILE *f;
f = fopen(filename, "wb");
if (f) {
fwrite(buffer, sizeof(char), length, f);
fclose(f);
}
}
int plist_read_from_filename(plist_t *plist, const char *filename)
{
char *buffer = NULL;
uint64_t length;
if (!filename)
return 0;
buffer_read_from_filename(filename, &buffer, &length);
if (!buffer) {
return 0;
}
if ((length > 8) && (memcmp(buffer, "bplist00", 8) == 0)) {
plist_from_bin(buffer, length, plist);
} else {
plist_from_xml(buffer, length, plist);
}
free(buffer);
return 1;
}
int plist_write_to_filename(plist_t plist, const char *filename, enum plist_format_t format)
{
char *buffer = NULL;
uint32_t length;
if (!plist || !filename)
return 0;
if (format == PLIST_FORMAT_XML)
plist_to_xml(plist, &buffer, &length);
else if (format == PLIST_FORMAT_BINARY)
plist_to_bin(plist, &buffer, &length);
else
return 0;
buffer_write_to_filename(filename, buffer, length);
free(buffer);
return 1;
}
static const char base64_str[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static const char base64_pad = '=';
static char *base64encode(const unsigned char *buf, size_t size)
{
if (!buf || !(size > 0)) return NULL;
int outlen = (size / 3) * 4;
char *outbuf = (char*)malloc(outlen+5); // 4 spare bytes + 1 for '\0'
size_t n = 0;
size_t m = 0;
unsigned char input[3];
unsigned int output[4];
while (n < size) {
input[0] = buf[n];
input[1] = (n+1 < size) ? buf[n+1] : 0;
input[2] = (n+2 < size) ? buf[n+2] : 0;
output[0] = input[0] >> 2;
output[1] = ((input[0] & 3) << 4) + (input[1] >> 4);
output[2] = ((input[1] & 15) << 2) + (input[2] >> 6);
output[3] = input[2] & 63;
outbuf[m++] = base64_str[(int)output[0]];
outbuf[m++] = base64_str[(int)output[1]];
outbuf[m++] = (n+1 < size) ? base64_str[(int)output[2]] : base64_pad;
outbuf[m++] = (n+2 < size) ? base64_str[(int)output[3]] : base64_pad;
n+=3;
}
outbuf[m] = 0; // 0-termination!
return outbuf;
}
static void plist_node_print_to_stream(plist_t node, int* indent_level, FILE* stream);
static void plist_array_print_to_stream(plist_t node, int* indent_level, FILE* stream)
{
/* iterate over items */
int i, count;
plist_t subnode = NULL;
count = plist_array_get_size(node);
for (i = 0; i < count; i++) {
subnode = plist_array_get_item(node, i);
fprintf(stream, "%*s", *indent_level, "");
fprintf(stream, "%d: ", i);
plist_node_print_to_stream(subnode, indent_level, stream);
}
}
static void plist_dict_print_to_stream(plist_t node, int* indent_level, FILE* stream)
{
/* iterate over key/value pairs */
plist_dict_iter it = NULL;
char* key = NULL;
plist_t subnode = NULL;
plist_dict_new_iter(node, &it);
plist_dict_next_item(node, it, &key, &subnode);
while (subnode)
{
fprintf(stream, "%*s", *indent_level, "");
fprintf(stream, "%s", key);
if (plist_get_node_type(subnode) == PLIST_ARRAY)
fprintf(stream, "[%d]: ", plist_array_get_size(subnode));
else
fprintf(stream, ": ");
free(key);
key = NULL;
plist_node_print_to_stream(subnode, indent_level, stream);
plist_dict_next_item(node, it, &key, &subnode);
}
free(it);
}
static void plist_node_print_to_stream(plist_t node, int* indent_level, FILE* stream)
{
char *s = NULL;
char *data = NULL;
double d;
uint8_t b;
uint64_t u = 0;
struct timeval tv = { 0, 0 };
plist_type t;
if (!node)
return;
t = plist_get_node_type(node);
switch (t) {
case PLIST_BOOLEAN:
plist_get_bool_val(node, &b);
fprintf(stream, "%s\n", (b ? "true" : "false"));
break;
case PLIST_UINT:
plist_get_uint_val(node, &u);
fprintf(stream, "%"PRIu64"\n", u);
break;
case PLIST_REAL:
plist_get_real_val(node, &d);
fprintf(stream, "%f\n", d);
break;
case PLIST_STRING:
plist_get_string_val(node, &s);
fprintf(stream, "%s\n", s);
free(s);
break;
case PLIST_KEY:
plist_get_key_val(node, &s);
fprintf(stream, "%s: ", s);
free(s);
break;
case PLIST_DATA:
plist_get_data_val(node, &data, &u);
if (u > 0) {
s = base64encode((unsigned char*)data, u);
free(data);
if (s) {
fprintf(stream, "%s\n", s);
free(s);
} else {
fprintf(stream, "\n");
}
} else {
fprintf(stream, "\n");
}
break;
case PLIST_DATE:
plist_get_date_val(node, (int32_t*)&tv.tv_sec, (int32_t*)&tv.tv_usec);
{
time_t ti = (time_t)tv.tv_sec;
struct tm *btime = localtime(&ti);
if (btime) {
s = (char*)malloc(24);
memset(s, 0, 24);
if (strftime(s, 24, "%Y-%m-%dT%H:%M:%SZ", btime) <= 0) {
free (s);
s = NULL;
}
}
}
if (s) {
fprintf(stream, "%s\n", s);
free(s);
} else {
fprintf(stream, "\n");
}
break;
case PLIST_ARRAY:
fprintf(stream, "\n");
(*indent_level)++;
plist_array_print_to_stream(node, indent_level, stream);
(*indent_level)--;
break;
case PLIST_DICT:
fprintf(stream, "\n");
(*indent_level)++;
plist_dict_print_to_stream(node, indent_level, stream);
(*indent_level)--;
break;
default:
break;
}
}
void plist_print_to_stream(plist_t plist, FILE* stream)
{
int indent = 0;
if (!plist || !stream)
return;
switch (plist_get_node_type(plist)) {
case PLIST_DICT:
plist_dict_print_to_stream(plist, &indent, stream);
break;
case PLIST_ARRAY:
plist_array_print_to_stream(plist, &indent, stream);
break;
default:
plist_node_print_to_stream(plist, &indent, stream);
}
}
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