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src.rivoreo.one / net / nginx-mbedtls / a3b9eb91d36557964697d6a22ac0ab61d95421cf / . / src / core / ngx_string.c
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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
u_char *ngx_cpystrn(u_char *dst, u_char *src, size_t n)
{
if (n == 0) {
return dst;
}
for (/* void */; --n; dst++, src++) {
*dst = *src;
if (*dst == '\0') {
return dst;
}
}
*dst = '\0';
return dst;
}
/*
* supported formats:
* %[0][width]O off_t
* %[0][width]T time_t
* %[0][width]S ssize_t
* %[0][width]uS size_t
* %[0][width]uxS size_t in hex
* %[0][width]l long
* %[0][width]d int
* %[0][width]i ngx_int_t
* %[0][width]ui ngx_uint_t
* %[0][width]uxi ngx_uint_t in hex
* %s null-terminated string
* %% %
*
*/
u_char *ngx_sprintf(u_char *buf, char *fmt, ...)
{
u_char *p, c, temp[NGX_MAX_INT_LEN];
int d;
long l;
off_t offset;
size_t size, len;
ssize_t ssize;
time_t sec;
va_list arg;
ngx_int_t i;
ngx_uint_t ui, zero, width, sign, hexadecimal;
static u_char hex[] = "0123456789abcdef";
va_start(arg, fmt);
while (*fmt) {
if (*fmt == '%') {
zero = (*++fmt == '0') ? 1 : 0;
width = 0;
sign = 1;
hexadecimal = 0;
p = temp + NGX_MAX_INT_LEN;
while (*fmt >= '0' && *fmt <= '9') {
width = width * 10 + *fmt++ - '0';
}
for ( ;; ) {
switch (*fmt) {
case 'u':
sign = 0;
fmt++;
continue;
case 'x':
hexadecimal = 1;
fmt++;
continue;
default:
break;
}
break;
}
switch (*fmt) {
case 'O':
offset = va_arg(arg, off_t);
if (offset < 0) {
*buf++ = '-';
offset = -offset;
}
do {
*--p = (u_char) (offset % 10 + '0');
} while (offset /= 10);
break;
case 'T':
sec = va_arg(arg, time_t);
if (sec < 0) {
*buf++ = '-';
sec = -sec;
}
do {
*--p = (u_char) (sec % 10 + '0');
} while (sec /= 10);
break;
case 'S':
if (sign) {
ssize = va_arg(arg, ssize_t);
if (ssize < 0) {
*buf++ = '-';
size = (size_t) -ssize;
} else {
size = (size_t) ssize;
}
} else {
size = va_arg(arg, size_t);
}
if (hexadecimal) {
do {
*--p = hex[size & 0xf];
} while (size >>= 4);
} else {
do {
*--p = (u_char) (size % 10 + '0');
} while (size /= 10);
}
break;
case 'l':
l = va_arg(arg, long);
if (l < 0) {
*buf++ = '-';
l = -l;
}
do {
*--p = (u_char) (l % 10 + '0');
} while (l /= 10);
break;
case 'd':
d = va_arg(arg, int);
if (d < 0) {
*buf++ = '-';
d = -d;
}
do {
*--p = (u_char) (d % 10 + '0');
} while (d /= 10);
break;
case 'i':
if (sign) {
i = va_arg(arg, ngx_int_t);
if (i < 0) {
*buf++ = '-';
ui = (ngx_uint_t) -i;
} else {
ui = (ngx_uint_t) i;
}
} else {
ui = va_arg(arg, ngx_uint_t);
}
if (hexadecimal) {
do {
*--p = hex[ui & 0xf];
} while (ui >>= 4);
} else {
do {
*--p = (u_char) (ui % 10 + '0');
} while (ui /= 10);
}
break;
case 's':
p = va_arg(arg, u_char *);
while (*p) {
*buf++ = *p++;
}
fmt++;
continue;
case '%':
*buf++ = '%';
fmt++;
continue;
default:
*buf++ = *fmt++;
continue;
}
len = (temp + NGX_MAX_INT_LEN) - p;
c = (u_char) (zero ? '0' : ' ');
while (len++ < width) {
*buf++ = c;
}
buf = ngx_cpymem(buf, p, ((temp + NGX_MAX_INT_LEN) - p));
fmt++;
} else {
*buf++ = *fmt++;
}
}
va_end(arg);
*buf = '\0';
return buf;
}
ngx_int_t ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
{
if (n == 0) {
return 0;
}
n--;
for ( ;; ) {
if (s1[n] != s2[n]) {
return s1[n] - s2[n];
}
if (n == 0) {
return 0;
}
n--;
}
}
ngx_int_t ngx_rstrncasecmp(u_char *s1, u_char *s2, size_t n)
{
u_char c1, c2;
if (n == 0) {
return 0;
}
n--;
for ( ;; ) {
c1 = s1[n];
if (c1 >= 'a' && c1 <= 'z') {
c1 -= 'a' - 'A';
}
c2 = s2[n];
if (c2 >= 'a' && c2 <= 'z') {
c2 -= 'a' - 'A';
}
if (c1 != c2) {
return c1 - c2;
}
if (n == 0) {
return 0;
}
n--;
}
}
ngx_int_t ngx_atoi(u_char *line, size_t n)
{
ngx_int_t value;
if (n == 0) {
return NGX_ERROR;
}
for (value = 0; n--; line++) {
if (*line < '0' || *line > '9') {
return NGX_ERROR;
}
value = value * 10 + (*line - '0');
}
if (value < 0) {
return NGX_ERROR;
} else {
return value;
}
}
ngx_int_t ngx_hextoi(u_char *line, size_t n)
{
u_char ch;
ngx_int_t value;
if (n == 0) {
return NGX_ERROR;
}
for (value = 0; n--; line++) {
ch = *line;
if (ch >= '0' && ch <= '9') {
value = value * 16 + (ch - '0');
continue;
}
if (ch >= 'A' && ch <= 'F') {
value = value * 16 + (ch - 'A' + 10);
continue;
}
if (ch >= 'a' && ch <= 'f') {
value = value * 16 + (ch - 'a' + 10);
continue;
}
return NGX_ERROR;
}
if (value < 0) {
return NGX_ERROR;
} else {
return value;
}
}
void ngx_md5_text(u_char *text, u_char *md5)
{
int i;
static u_char hex[] = "0123456789abcdef";
for (i = 0; i < 16; i++) {
*text++ = hex[md5[i] >> 4];
*text++ = hex[md5[i] & 0xf];
}
*text = '\0';
}
void ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
{
u_char *d, *s;
size_t len;
static u_char basis64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
len = src->len;
s = src->data;
d = dst->data;
while (len > 2) {
*d++ = basis64[(s[0] >> 2) & 0x3f];
*d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
*d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
*d++ = basis64[s[2] & 0x3f];
s += 3;
len -= 3;
}
if (len) {
*d++ = basis64[(s[0] >> 2) & 0x3f];
if (len == 1) {
*d++ = basis64[(s[0] & 3) << 4];
*d++ = '=';
} else {
*d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
*d++ = basis64[(s[1] & 0x0f) << 2];
}
*d++ = '=';
}
dst->len = d - dst->data;
}
ngx_int_t ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src)
{
size_t len;
u_char *d, *s;
static u_char basis64[] =
{ 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77, 77, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 77,
77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77 };
for (len = 0; len < src->len; len++) {
if (src->data[len] == '=') {
break;
}
if (basis64[src->data[len]] == 77) {
return NGX_ERROR;
}
}
if (len % 4 == 1) {
return NGX_ERROR;
}
s = src->data;
d = dst->data;
while (len > 3) {
*d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
*d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
*d++ = (u_char) (basis64[s[2]] << 6 | basis64[s[3]]);
s += 4;
len -= 4;
}
if (len > 1) {
*d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
}
if (len > 2) {
*d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
}
dst->len = d - dst->data;
return NGX_OK;
}
ngx_int_t ngx_escape_uri(u_char *dst, u_char *src, size_t size)
{
ngx_int_t n;
ngx_uint_t i;
static u_char hex[] = "0123456789abcdef";
static uint32_t escape[] =
{ 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
/* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
0x80000021, /* 1000 0000 0000 0000 0000 0000 0010 0001 */
/* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
/* ~}| {zyx wvut srqp onml kjih gfed cba` */
0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
if (dst == NULL) {
/* find the number of the characters to be escaped */
n = 0;
for (i = 0; i < size; i++) {
if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
n++;
}
src++;
}
return n;
}
for (i = 0; i < size; i++) {
if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
*dst++ = '%';
*dst++ = hex[*src >> 4];
*dst++ = hex[*src & 0xf];
src++;
} else {
*dst++ = *src++;
}
}
return NGX_OK;
}