/* * Copyright (C) Igor Sysoev */ #include #include 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 = 8; 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 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; } size_t ngx_utf_length(ngx_str_t *utf) { u_char c; size_t len; ngx_uint_t i; for (len = 0, i = 0; i < utf->len; len++, i++) { c = utf->data[i]; if (c < 0x80) { continue; } if (c >= 0xc0) { for (c <<= 1; c & 0x80; c <<= 1) { i++; } continue; } /* invalid utf */ return utf->len; } 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) { 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 == '?') { *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 (ch > '%' && ch < 0x7f) { *d++ = ch; break; } *d++ = '%'; *d++ = *(s - 2); *d++ = *(s - 1); break; } c = (u_char) (ch | 0x20); if (c >= 'a' && c <= 'f') { ch = (u_char) ((decoded << 4) + c - 'a' + 10); if (ch == '?') { *d++ = ch; goto done; } if (ch > '%' && ch < 0x7f) { *d++ = ch; break; } *d++ = '%'; *d++ = *(s - 2); *d++ = *(s - 1); 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