| |
| /* |
| * 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; |
| } |
| |
| |
| u_char * |
| ngx_pstrdup(ngx_pool_t *pool, ngx_str_t *src) |
| { |
| u_char *dst; |
| |
| dst = ngx_palloc(pool, src->len); |
| if (dst == NULL) { |
| return NULL; |
| } |
| |
| ngx_memcpy(dst, src->data, src->len); |
| |
| return dst; |
| } |
| |
| |
| /* |
| * supported formats: |
| * %[0][width][x][X]O off_t |
| * %[0][width]T time_t |
| * %[0][width][u][x|X]z ssize_t/size_t |
| * %[0][width][u][x|X]d int/u_int |
| * %[0][width][u][x|X]l long |
| * %[0][width|m][u][x|X]i ngx_int_t/ngx_uint_t |
| * %[0][width][u][x|X]D int32_t/uint32_t |
| * %[0][width][u][x|X]L int64_t/uint64_t |
| * %[0][width|m][u][x|X]A ngx_atomic_int_t/ngx_atomic_uint_t |
| * %P ngx_pid_t |
| * %M ngx_msec_t |
| * %r rlim_t |
| * %p pointer |
| * %V pointer to ngx_str_t |
| * %s null-terminated string |
| * %Z '\0' |
| * %N '\n' |
| * %c char |
| * %% % |
| * |
| * reserved: |
| * %t ptrdiff_t |
| * %S null-teminated wchar string |
| * %C wchar |
| */ |
| |
| |
| u_char * ngx_cdecl |
| ngx_sprintf(u_char *buf, const char *fmt, ...) |
| { |
| u_char *p; |
| va_list args; |
| |
| va_start(args, fmt); |
| p = ngx_vsnprintf(buf, /* STUB */ 65536, fmt, args); |
| va_end(args); |
| |
| return p; |
| } |
| |
| |
| u_char * ngx_cdecl |
| ngx_snprintf(u_char *buf, size_t max, const char *fmt, ...) |
| { |
| u_char *p; |
| va_list args; |
| |
| va_start(args, fmt); |
| p = ngx_vsnprintf(buf, max, fmt, args); |
| va_end(args); |
| |
| return p; |
| } |
| |
| |
| u_char * |
| ngx_vsnprintf(u_char *buf, size_t max, const char *fmt, va_list args) |
| { |
| u_char *p, zero, *last, temp[NGX_INT64_LEN + 1]; |
| /* |
| * really we need temp[NGX_INT64_LEN] only, |
| * but icc issues the warning |
| */ |
| int d; |
| size_t len; |
| uint32_t ui32; |
| int64_t i64; |
| uint64_t ui64; |
| ngx_msec_t ms; |
| ngx_str_t *s; |
| ngx_uint_t width, sign, hexadecimal, max_width; |
| static u_char hex[] = "0123456789abcdef"; |
| static u_char HEX[] = "0123456789ABCDEF"; |
| |
| if (max == 0) { |
| return buf; |
| } |
| |
| last = buf + max; |
| |
| while (*fmt && buf < last) { |
| |
| /* |
| * "buf < last" means that we could copy at least one character: |
| * the plain character, "%%", "%c", and minus without the checking |
| */ |
| |
| if (*fmt == '%') { |
| |
| i64 = 0; |
| ui64 = 0; |
| |
| zero = (u_char) ((*++fmt == '0') ? '0' : ' '); |
| width = 0; |
| sign = 1; |
| hexadecimal = 0; |
| max_width = 0; |
| |
| p = temp + NGX_INT64_LEN; |
| |
| while (*fmt >= '0' && *fmt <= '9') { |
| width = width * 10 + *fmt++ - '0'; |
| } |
| |
| |
| for ( ;; ) { |
| switch (*fmt) { |
| |
| case 'u': |
| sign = 0; |
| fmt++; |
| continue; |
| |
| case 'm': |
| max_width = 1; |
| fmt++; |
| continue; |
| |
| case 'X': |
| hexadecimal = 2; |
| sign = 0; |
| fmt++; |
| continue; |
| |
| case 'x': |
| hexadecimal = 1; |
| sign = 0; |
| fmt++; |
| continue; |
| |
| default: |
| break; |
| } |
| |
| break; |
| } |
| |
| |
| switch (*fmt) { |
| |
| case 'V': |
| s = va_arg(args, ngx_str_t *); |
| |
| len = s->len & 0xffff; |
| len = (buf + len < last) ? len : (size_t) (last - buf); |
| |
| buf = ngx_cpymem(buf, s->data, len); |
| fmt++; |
| |
| continue; |
| |
| case 's': |
| p = va_arg(args, u_char *); |
| |
| while (*p && buf < last) { |
| *buf++ = *p++; |
| } |
| fmt++; |
| |
| continue; |
| |
| case 'O': |
| i64 = (int64_t) va_arg(args, off_t); |
| sign = 1; |
| break; |
| |
| case 'P': |
| i64 = (int64_t) va_arg(args, ngx_pid_t); |
| sign = 1; |
| break; |
| |
| case 'T': |
| i64 = (int64_t) va_arg(args, time_t); |
| sign = 1; |
| break; |
| |
| case 'M': |
| ms = (ngx_msec_t) va_arg(args, ngx_msec_t); |
| if ((ngx_msec_int_t) ms == -1) { |
| sign = 1; |
| i64 = -1; |
| } else { |
| sign = 0; |
| ui64 = (uint64_t) ms; |
| } |
| break; |
| |
| case 'z': |
| if (sign) { |
| i64 = (int64_t) va_arg(args, ssize_t); |
| } else { |
| ui64 = (uint64_t) va_arg(args, size_t); |
| } |
| break; |
| |
| case 'i': |
| if (sign) { |
| i64 = (int64_t) va_arg(args, ngx_int_t); |
| } else { |
| ui64 = (uint64_t) va_arg(args, ngx_uint_t); |
| } |
| |
| if (max_width) { |
| width = NGX_INT_T_LEN; |
| } |
| |
| break; |
| |
| case 'd': |
| if (sign) { |
| i64 = (int64_t) va_arg(args, int); |
| } else { |
| ui64 = (uint64_t) va_arg(args, u_int); |
| } |
| break; |
| |
| case 'l': |
| if (sign) { |
| i64 = (int64_t) va_arg(args, long); |
| } else { |
| ui64 = (uint64_t) va_arg(args, u_long); |
| } |
| break; |
| |
| case 'D': |
| if (sign) { |
| i64 = (int64_t) va_arg(args, int32_t); |
| } else { |
| ui64 = (uint64_t) va_arg(args, uint32_t); |
| } |
| break; |
| |
| case 'L': |
| if (sign) { |
| i64 = va_arg(args, int64_t); |
| } else { |
| ui64 = va_arg(args, uint64_t); |
| } |
| break; |
| |
| case 'A': |
| if (sign) { |
| i64 = (int64_t) va_arg(args, ngx_atomic_int_t); |
| } else { |
| ui64 = (uint64_t) va_arg(args, ngx_atomic_uint_t); |
| } |
| |
| if (max_width) { |
| width = NGX_ATOMIC_T_LEN; |
| } |
| |
| break; |
| |
| #if !(NGX_WIN32) |
| case 'r': |
| i64 = (int64_t) va_arg(args, rlim_t); |
| sign = 1; |
| break; |
| #endif |
| |
| case 'p': |
| ui64 = (uintptr_t) va_arg(args, void *); |
| hexadecimal = 2; |
| sign = 0; |
| zero = '0'; |
| width = NGX_PTR_SIZE * 2; |
| break; |
| |
| case 'c': |
| d = va_arg(args, int); |
| *buf++ = (u_char) (d & 0xff); |
| fmt++; |
| |
| continue; |
| |
| case 'Z': |
| *buf++ = '\0'; |
| fmt++; |
| |
| continue; |
| |
| case 'N': |
| #if (NGX_WIN32) |
| *buf++ = CR; |
| #endif |
| *buf++ = LF; |
| fmt++; |
| |
| continue; |
| |
| case '%': |
| *buf++ = '%'; |
| fmt++; |
| |
| continue; |
| |
| default: |
| *buf++ = *fmt++; |
| |
| continue; |
| } |
| |
| if (sign) { |
| if (i64 < 0) { |
| *buf++ = '-'; |
| ui64 = (uint64_t) -i64; |
| |
| } else { |
| ui64 = (uint64_t) i64; |
| } |
| } |
| |
| if (hexadecimal == 1) { |
| do { |
| |
| /* the "(uint32_t)" cast disables the BCC's warning */ |
| *--p = hex[(uint32_t) (ui64 & 0xf)]; |
| |
| } while (ui64 >>= 4); |
| |
| } else if (hexadecimal == 2) { |
| do { |
| |
| /* the "(uint32_t)" cast disables the BCC's warning */ |
| *--p = HEX[(uint32_t) (ui64 & 0xf)]; |
| |
| } while (ui64 >>= 4); |
| |
| } else if (ui64 <= NGX_MAX_UINT32_VALUE) { |
| |
| /* |
| * To divide 64-bit number and to find the remainder |
| * on the x86 platform gcc and icc call the libc functions |
| * [u]divdi3() and [u]moddi3(), they call another function |
| * in its turn. On FreeBSD it is the qdivrem() function, |
| * its source code is about 170 lines of the code. |
| * The glibc counterpart is about 150 lines of the code. |
| * |
| * For 32-bit numbers and some divisors gcc and icc use |
| * the inlined multiplication and shifts. For example, |
| * unsigned "i32 / 10" is compiled to |
| * |
| * (i32 * 0xCCCCCCCD) >> 35 |
| */ |
| |
| ui32 = (uint32_t) ui64; |
| |
| do { |
| *--p = (u_char) (ui32 % 10 + '0'); |
| } while (ui32 /= 10); |
| |
| } else { |
| do { |
| *--p = (u_char) (ui64 % 10 + '0'); |
| } while (ui64 /= 10); |
| } |
| |
| len = (temp + NGX_INT64_LEN) - p; |
| |
| while (len++ < width && buf < last) { |
| *buf++ = zero; |
| } |
| |
| len = (temp + NGX_INT64_LEN) - p; |
| if (buf + len > last) { |
| len = last - buf; |
| } |
| |
| buf = ngx_cpymem(buf, p, len); |
| |
| fmt++; |
| |
| } else { |
| *buf++ = *fmt++; |
| } |
| } |
| |
| 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; |
| } |
| } |
| |
| |
| ssize_t |
| ngx_atosz(u_char *line, size_t n) |
| { |
| ssize_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; |
| } |
| } |
| |
| |
| off_t |
| ngx_atoof(u_char *line, size_t n) |
| { |
| off_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; |
| } |
| } |
| |
| |
| time_t |
| ngx_atotm(u_char *line, size_t n) |
| { |
| time_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 c, 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; |
| } |
| |
| c = (u_char) (ch | 0x20); |
| |
| if (c >= 'a' && c <= 'f') { |
| value = value * 16 + (c - '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_utf_decode() decodes two and more bytes UTF sequences only |
| * the return values: |
| * 0x80 - 0x10ffff valid character |
| * 0x10ffff - 0xfffffffd invalid sequence |
| * 0xfffffffe incomplete sequence |
| * 0xffffffff error |
| */ |
| |
| uint32_t |
| ngx_utf_decode(u_char **p, size_t n) |
| { |
| size_t len; |
| uint32_t u, i, valid; |
| |
| u = **p; |
| |
| if (u > 0xf0) { |
| |
| u &= 0x07; |
| valid = 0xffff; |
| len = 3; |
| |
| } else if (u > 0xe0) { |
| |
| u &= 0x0f; |
| valid = 0x7ff; |
| len = 2; |
| |
| } else if (u > 0xc0) { |
| |
| u &= 0x1f; |
| valid = 0x7f; |
| len = 1; |
| |
| } else { |
| (*p)++; |
| return 0xffffffff; |
| } |
| |
| if (n - 1 < len) { |
| return 0xfffffffe; |
| } |
| |
| (*p)++; |
| |
| while (len) { |
| i = *(*p)++; |
| |
| if (i < 0x80) { |
| return 0xffffffff; |
| } |
| |
| u = (u << 6) | (i & 0x3f); |
| |
| len--; |
| } |
| |
| if (u > valid) { |
| return u; |
| } |
| |
| return 0xffffffff; |
| } |
| |
| |
| size_t |
| ngx_utf_length(u_char *p, size_t n) |
| { |
| u_char c; |
| size_t len; |
| ngx_uint_t i; |
| |
| for (len = 0, i = 0; i < n; len++, i++) { |
| |
| c = p[i]; |
| |
| if (c < 0x80) { |
| continue; |
| } |
| |
| if (c >= 0xc0) { |
| for (c <<= 1; c & 0x80; c <<= 1) { |
| i++; |
| } |
| |
| continue; |
| } |
| |
| /* invalid utf */ |
| |
| return n; |
| } |
| |
| return len; |
| } |
| |
| |
| u_char * |
| ngx_utf_cpystrn(u_char *dst, u_char *src, size_t n) |
| { |
| u_char c; |
| |
| if (n == 0) { |
| return dst; |
| } |
| |
| for ( /* void */ ; --n; dst++, src++) { |
| |
| c = *src; |
| *dst = c; |
| |
| if (c < 0x80) { |
| if (*dst != '\0') { |
| continue; |
| } |
| |
| return dst; |
| } |
| |
| if (c >= 0xc0) { |
| for (c <<= 1; c & 0x80; c <<= 1) { |
| *++dst = *++src; |
| } |
| |
| continue; |
| } |
| |
| /* invalid utf */ |
| } |
| |
| *dst = '\0'; |
| |
| return dst; |
| } |
| |
| |
| uintptr_t |
| ngx_escape_uri(u_char *dst, u_char *src, size_t size, ngx_uint_t type) |
| { |
| ngx_uint_t i, n; |
| uint32_t *escape; |
| static u_char hex[] = "0123456789abcdef"; |
| |
| /* " ", "#", "%", "?", %00-%1F, %7F-%FF */ |
| |
| static uint32_t uri[] = { |
| 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */ |
| |
| /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */ |
| 0x80000029, /* 1000 0000 0000 0000 0000 0000 0010 1001 */ |
| |
| /* _^]\ [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 */ |
| }; |
| |
| /* " ", "#", "%", "+", "?", %00-%1F, %7F-%FF */ |
| |
| static uint32_t args[] = { |
| 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */ |
| |
| /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */ |
| 0x80000829, /* 1000 0000 0000 0000 0000 1000 0010 1001 */ |
| |
| /* _^]\ [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 */ |
| }; |
| |
| /* " ", """, "%", "'", %00-%1F, %7F-%FF */ |
| |
| static uint32_t html[] = { |
| 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */ |
| |
| /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */ |
| 0x800000ad, /* 0000 0000 0000 0000 0000 0000 1010 1101 */ |
| |
| /* _^]\ [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 */ |
| }; |
| |
| |
| switch (type) { |
| case NGX_ESCAPE_HTML: |
| escape = html; |
| break; |
| case NGX_ESCAPE_ARGS: |
| escape = args; |
| break; |
| default: |
| escape = uri; |
| break; |
| } |
| |
| 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 (uintptr_t) 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 (uintptr_t) dst; |
| } |
| |
| |
| void |
| ngx_unescape_uri(u_char **dst, u_char **src, size_t size, ngx_uint_t type) |
| { |
| u_char *d, *s, ch, c, decoded; |
| enum { |
| sw_usual = 0, |
| sw_quoted, |
| sw_quoted_second |
| } state; |
| |
| d = *dst; |
| s = *src; |
| |
| state = 0; |
| decoded = 0; |
| |
| while (size--) { |
| |
| ch = *s++; |
| |
| switch (state) { |
| case sw_usual: |
| if (ch == '?' && type == NGX_UNESCAPE_URI) { |
| *d++ = ch; |
| goto done; |
| } |
| |
| if (ch == '%') { |
| state = sw_quoted; |
| break; |
| } |
| |
| *d++ = ch; |
| break; |
| |
| case sw_quoted: |
| |
| if (ch >= '0' && ch <= '9') { |
| decoded = (u_char) (ch - '0'); |
| state = sw_quoted_second; |
| break; |
| } |
| |
| c = (u_char) (ch | 0x20); |
| if (c >= 'a' && c <= 'f') { |
| decoded = (u_char) (c - 'a' + 10); |
| state = sw_quoted_second; |
| break; |
| } |
| |
| /* the invalid quoted character */ |
| |
| state = sw_usual; |
| |
| *d++ = ch; |
| |
| break; |
| |
| case sw_quoted_second: |
| |
| state = sw_usual; |
| |
| if (ch >= '0' && ch <= '9') { |
| ch = (u_char) ((decoded << 4) + ch - '0'); |
| |
| if (type == NGX_UNESCAPE_URI) { |
| if (ch > '%' && ch < 0x7f) { |
| *d++ = ch; |
| break; |
| } |
| |
| *d++ = '%'; *d++ = *(s - 2); *d++ = *(s - 1); |
| |
| break; |
| } |
| |
| *d++ = ch; |
| |
| break; |
| } |
| |
| c = (u_char) (ch | 0x20); |
| if (c >= 'a' && c <= 'f') { |
| ch = (u_char) ((decoded << 4) + c - 'a' + 10); |
| |
| if (type == NGX_UNESCAPE_URI) { |
| if (ch == '?') { |
| *d++ = ch; |
| goto done; |
| } |
| |
| if (ch > '%' && ch < 0x7f) { |
| *d++ = ch; |
| break; |
| } |
| |
| *d++ = '%'; *d++ = *(s - 2); *d++ = *(s - 1); |
| break; |
| } |
| |
| *d++ = ch; |
| |
| break; |
| } |
| |
| /* the invalid quoted character */ |
| |
| break; |
| } |
| } |
| |
| done: |
| |
| *dst = d; |
| *src = s; |
| } |
| |
| |
| #if (NGX_MEMCPY_LIMIT) |
| |
| void * |
| ngx_memcpy(void *dst, void *src, size_t n) |
| { |
| if (n > NGX_MEMCPY_LIMIT) { |
| ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, "memcpy %uz bytes", n); |
| ngx_debug_point(); |
| } |
| |
| return memcpy(dst, src, n); |
| } |
| |
| #endif |
