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livetrax/libs/aaf/utils.c

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/*
* Copyright (C) 2017-2023 Adrien Gesta-Fline
*
* This file is part of libAAF.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <ctype.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "aaf/utils.h"
#define BUILD_PATH_DEFAULT_BUF_SIZE 1024
int
laaf_util_wstr_contains_nonlatin (const wchar_t* str)
{
for (size_t i = 0; str[i] != 0x0000; i++) {
/* if char is out of the Basic Latin range */
if (str[i] > 0xff) {
return 1;
}
}
return 0;
}
char*
laaf_util_clean_filename (char* fname)
{
/*
* sanitize file/dir name
* https://stackoverflow.com/a/31976060
*/
size_t len = strlen (fname);
for (size_t i = 0; i < len; i++) {
unsigned char c = fname[i];
if (c == '/' ||
c == '<' ||
c == '>' ||
c == ':' ||
c == '"' ||
c == '|' ||
c == '?' ||
c == '*' ||
c == '\\' ||
(c > 0 && c < 0x20)) {
fname[i] = '_';
}
}
/* windows filenames can't end with ' ' or '.' */
for (int i = len - 1; i > 0; i--) {
char c = fname[i];
if (c != ' ' && c != '.') {
break;
}
fname[i] = '_';
}
return fname;
}
const char*
laaf_util_fop_get_file (const char* filepath)
{
if (filepath == NULL) {
return NULL;
}
const char* end = filepath + strlen (filepath);
while (end > filepath && !IS_DIR_SEP (*end)) {
--end;
}
return (IS_DIR_SEP (*end)) ? end + 1 : end;
}
char*
laaf_util_build_path (const char* sep, const char* first, ...)
{
char* str = malloc (BUILD_PATH_DEFAULT_BUF_SIZE);
if (str == NULL) {
return NULL;
}
size_t len = BUILD_PATH_DEFAULT_BUF_SIZE;
size_t offset = 0;
va_list args;
if (!sep) {
sep = DIR_SEP_STR;
}
int element_count = 0;
va_start (args, first);
const char* arg = first;
do {
int arglen = strlen (arg);
int argstart = 0;
int has_leading_sep = 0;
/* trim leading DIR_SEP */
for (int i = 0; arg[i] != 0x00; i++) {
if (IS_DIR_SEP (arg[i])) {
has_leading_sep = 1;
argstart++;
} else {
break;
}
}
/* trim trailing DIR_SEP */
for (int i = arglen - 1; i >= argstart; i--) {
if (IS_DIR_SEP (arg[i])) {
arglen--;
} else {
break;
}
}
/* TODO ? */
if (element_count == 0 && has_leading_sep) {
} else {
}
size_t reqlen = snprintf (NULL, 0, "%.*s", arglen - argstart, arg + argstart) + 1;
if (offset + reqlen >= len) {
reqlen = ((offset + reqlen) > (len + BUILD_PATH_DEFAULT_BUF_SIZE)) ? (offset + reqlen) : (len + BUILD_PATH_DEFAULT_BUF_SIZE);
char* tmp = realloc (str, (offset + reqlen));
if (tmp) {
str = tmp;
len = (offset + reqlen);
} else {
free (str);
return NULL;
}
}
offset += snprintf (str + offset, len - offset, "%s%.*s",
((element_count == 0 && has_leading_sep) || (element_count > 0)) ? sep : "",
arglen - argstart,
arg + argstart);
element_count++;
} while ((arg = va_arg (args, char*)) != NULL);
va_end (args);
return str;
}
int
laaf_util_snprintf_realloc (char** str, int* size, size_t offset, const char* format, ...)
{
int tmpsize = 0;
if (!size) {
size = &tmpsize;
}
int retval, needed;
va_list ap;
va_start (ap, format);
while (0 <= (retval = vsnprintf ((*str) + offset, (*size) - offset, format, ap)) && (int64_t) ((*size) - offset) < (needed = retval + 1)) {
va_end (ap);
*size *= 2;
if ((int64_t) ((*size) - offset) < needed)
*size = needed + offset;
char* p = realloc (*str, *size);
if (p) {
*str = p;
} else {
free (*str);
*str = NULL;
*size = 0;
return -1;
}
va_start (ap, format);
}
va_end (ap);
return retval;
}
int
laaf_util_vsnprintf_realloc (char** str, int* size, int offset, const char* fmt, va_list* args)
{
va_list args2, args3;
va_copy (args2, *args);
va_copy (args3, *args);
int needed = vsnprintf (NULL, 0, fmt, args2) + 1;
if (needed >= (*size) - offset) {
char* p = realloc (*str, offset + needed);
if (p) {
*str = p;
*size = offset + needed;
} else {
/* If realloc() fails, the original block is left untouched; it is not freed or moved. */
va_end (args2);
va_end (args3);
return -1;
}
}
va_end (args2);
int written = vsnprintf ((*str) + offset, (*size) - offset, fmt, args3);
va_end (args3);
return written;
}
char*
laaf_util_c99strdup (const char* src)
{
if (!src) {
return NULL;
}
int len = 0;
while (src[len]) {
len++;
}
char* str = malloc (len + 1);
if (!str)
return NULL;
char* p = str;
while (*src) {
*(p++) = *(src++);
}
*p = '\0';
return str;
}
int
laaf_util_dump_hex (const unsigned char* stream, size_t stream_sz, char** buf, int* bufsz, int offset)
{
if (stream == NULL) {
return -1;
}
int initialOffset = offset;
uint32_t i = 0;
char hex[49];
char ascii[19];
uint32_t count = 0;
offset += laaf_util_snprintf_realloc (buf, bufsz, offset, " ______________________________ Hex Dump ______________________________\n\n");
while (count < stream_sz) {
uint32_t lineLen = (stream_sz - count) / 16;
if (lineLen <= 0)
lineLen = (stream_sz) % 16;
else
lineLen = 16;
memset (&hex, 0x20, sizeof (hex));
memset (&ascii, 0x00, sizeof (ascii));
uint32_t linepos = 0;
for (i = 0; i < lineLen; i++) {
linepos += snprintf (&hex[linepos], sizeof (hex) - (linepos), "%02x%s", *(const unsigned char*)(stream + count + i), (i == 7) ? " " : " ");
if (i < 8) {
if (isalnum (*(stream + count + i)))
ascii[i] = *(const unsigned char*)(stream + count + i);
else
ascii[i] = '.';
} else if (i > 8) {
if (isalnum (*(stream + count + i)))
ascii[i + 1] = *(const unsigned char*)(stream + count + i);
else
ascii[i + 1] = '.';
} else {
if (isalnum (*(stream + count + i))) {
ascii[i] = ' ';
ascii[i + 1] = *(const unsigned char*)(stream + count + i);
} else {
ascii[i] = ' ';
ascii[i + 1] = '.';
}
}
}
/* Fill with blank the rest of the line */
if (lineLen < 16) {
for (i = linepos; i < 48; i++) {
hex[linepos++] = 0x20;
}
}
/* terminate the line */
hex[48] = 0x00;
count += lineLen;
offset += laaf_util_snprintf_realloc (buf, bufsz, offset, " %s | %s\n", hex, ascii);
}
offset += laaf_util_snprintf_realloc (buf, bufsz, offset, " ______________________________________________________________________\n\n");
return offset - initialOffset; /* bytes written */
}