/* Simple transformations functions. Copyright (C) 1997-2023 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C 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. The GNU C 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 the GNU C Library; if not, see . */ #include #include #include #include #include #include #include #include #include #include #include #define BUILTIN_ALIAS(s1, s2) /* nothing */ #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \ MinF, MaxF, MinT, MaxT) \ extern int Fct (struct __gconv_step *, struct __gconv_step_data *, \ const unsigned char **, const unsigned char *, \ unsigned char **, size_t *, int, int); #include "gconv_builtin.h" #ifndef EILSEQ # define EILSEQ EINVAL #endif /* Specialized conversion function for a single byte to INTERNAL, recognizing only ASCII characters. */ wint_t __gconv_btwoc_ascii (struct __gconv_step *step, unsigned char c) { if (c < 0x80) return c; else return WEOF; } /* Transform from the internal, UCS4-like format, to UCS4. The difference between the internal ucs4 format and the real UCS4 format is, if any, the endianess. The Unicode/ISO 10646 says that unless some higher protocol specifies it differently, the byte order is big endian.*/ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP internal_ucs4_loop #define TO_LOOP internal_ucs4_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_internal_ucs4 #define ONE_DIRECTION 0 static inline int __attribute ((always_inline)) internal_ucs4_loop (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { const unsigned char *inptr = *inptrp; unsigned char *outptr = *outptrp; size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; int result; #if __BYTE_ORDER == __LITTLE_ENDIAN /* Sigh, we have to do some real work. */ size_t cnt; for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4) { uint32_t val = get32 (inptr); put32 (outptr, __builtin_bswap32 (val)); } *inptrp = inptr; *outptrp = outptr; #elif __BYTE_ORDER == __BIG_ENDIAN /* Simply copy the data. */ *inptrp = inptr + n_convert * 4; *outptrp = __mempcpy (outptr, inptr, n_convert * 4); #else # error "This endianess is not supported." #endif /* Determine the status. */ if (*inptrp == inend) result = __GCONV_EMPTY_INPUT; else if (*outptrp + 4 > outend) result = __GCONV_FULL_OUTPUT; else result = __GCONV_INCOMPLETE_INPUT; return result; } static inline int __attribute ((always_inline)) internal_ucs4_loop_single (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { mbstate_t *state = step_data->__statep; size_t cnt = state->__count & 7; while (*inptrp < inend && cnt < 4) state->__value.__wchb[cnt++] = *(*inptrp)++; if (__glibc_unlikely (cnt < 4)) { /* Still not enough bytes. Store the ones in the input buffer. */ state->__count &= ~7; state->__count |= cnt; return __GCONV_INCOMPLETE_INPUT; } #if __BYTE_ORDER == __LITTLE_ENDIAN (*outptrp)[0] = state->__value.__wchb[3]; (*outptrp)[1] = state->__value.__wchb[2]; (*outptrp)[2] = state->__value.__wchb[1]; (*outptrp)[3] = state->__value.__wchb[0]; #elif __BYTE_ORDER == __BIG_ENDIAN /* XXX unaligned */ (*outptrp)[0] = state->__value.__wchb[0]; (*outptrp)[1] = state->__value.__wchb[1]; (*outptrp)[2] = state->__value.__wchb[2]; (*outptrp)[3] = state->__value.__wchb[3]; #else # error "This endianess is not supported." #endif *outptrp += 4; /* Clear the state buffer. */ state->__count &= ~7; return __GCONV_OK; } #include /* Transform from UCS4 to the internal, UCS4-like format. Unlike for the other direction we have to check for correct values here. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP ucs4_internal_loop #define TO_LOOP ucs4_internal_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_ucs4_internal #define ONE_DIRECTION 0 static inline int __attribute ((always_inline)) ucs4_internal_loop (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { int flags = step_data->__flags; const unsigned char *inptr = *inptrp; unsigned char *outptr = *outptrp; int result; for (; inptr + 4 <= inend && outptr + 4 <= outend; inptr += 4) { uint32_t inval = get32 (inptr); #if __BYTE_ORDER == __LITTLE_ENDIAN inval = __builtin_bswap32 (inval); #endif if (__glibc_unlikely (inval > 0x7fffffff)) { /* The value is too large. We don't try transliteration here since this is not an error because of the lack of possibilities to represent the result. This is a genuine bug in the input since UCS4 does not allow such values. */ if (irreversible == NULL) /* We are transliterating, don't try to correct anything. */ return __GCONV_ILLEGAL_INPUT; if (flags & __GCONV_IGNORE_ERRORS) { /* Just ignore this character. */ ++*irreversible; continue; } *inptrp = inptr; *outptrp = outptr; return __GCONV_ILLEGAL_INPUT; } put32 (outptr, inval); outptr += sizeof (uint32_t); } *inptrp = inptr; *outptrp = outptr; /* Determine the status. */ if (*inptrp == inend) result = __GCONV_EMPTY_INPUT; else if (*outptrp + 4 > outend) result = __GCONV_FULL_OUTPUT; else result = __GCONV_INCOMPLETE_INPUT; return result; } static inline int __attribute ((always_inline)) ucs4_internal_loop_single (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { mbstate_t *state = step_data->__statep; int flags = step_data->__flags; size_t cnt = state->__count & 7; while (*inptrp < inend && cnt < 4) state->__value.__wchb[cnt++] = *(*inptrp)++; if (__glibc_unlikely (cnt < 4)) { /* Still not enough bytes. Store the ones in the input buffer. */ state->__count &= ~7; state->__count |= cnt; return __GCONV_INCOMPLETE_INPUT; } if (__builtin_expect (((unsigned char *) state->__value.__wchb)[0] > 0x80, 0)) { /* The value is too large. We don't try transliteration here since this is not an error because of the lack of possibilities to represent the result. This is a genuine bug in the input since UCS4 does not allow such values. */ if (!(flags & __GCONV_IGNORE_ERRORS)) { *inptrp -= cnt - (state->__count & 7); return __GCONV_ILLEGAL_INPUT; } } else { #if __BYTE_ORDER == __LITTLE_ENDIAN (*outptrp)[0] = state->__value.__wchb[3]; (*outptrp)[1] = state->__value.__wchb[2]; (*outptrp)[2] = state->__value.__wchb[1]; (*outptrp)[3] = state->__value.__wchb[0]; #elif __BYTE_ORDER == __BIG_ENDIAN (*outptrp)[0] = state->__value.__wchb[0]; (*outptrp)[1] = state->__value.__wchb[1]; (*outptrp)[2] = state->__value.__wchb[2]; (*outptrp)[3] = state->__value.__wchb[3]; #endif *outptrp += 4; } /* Clear the state buffer. */ state->__count &= ~7; return __GCONV_OK; } #include /* Similarly for the little endian form. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP internal_ucs4le_loop #define TO_LOOP internal_ucs4le_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_internal_ucs4le #define ONE_DIRECTION 0 static inline int __attribute ((always_inline)) internal_ucs4le_loop (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { const unsigned char *inptr = *inptrp; unsigned char *outptr = *outptrp; size_t n_convert = MIN (inend - inptr, outend - outptr) / 4; int result; #if __BYTE_ORDER == __BIG_ENDIAN /* Sigh, we have to do some real work. */ size_t cnt; for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4) { uint32_t val = get32 (inptr); put32 (outptr, __builtin_bswap32 (val)); } *inptrp = inptr; *outptrp = outptr; #elif __BYTE_ORDER == __LITTLE_ENDIAN /* Simply copy the data. */ *inptrp = inptr + n_convert * 4; *outptrp = __mempcpy (outptr, inptr, n_convert * 4); #else # error "This endianess is not supported." #endif /* Determine the status. */ if (*inptrp == inend) result = __GCONV_EMPTY_INPUT; else if (*outptrp + 4 > outend) result = __GCONV_FULL_OUTPUT; else result = __GCONV_INCOMPLETE_INPUT; return result; } static inline int __attribute ((always_inline)) internal_ucs4le_loop_single (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { mbstate_t *state = step_data->__statep; size_t cnt = state->__count & 7; while (*inptrp < inend && cnt < 4) state->__value.__wchb[cnt++] = *(*inptrp)++; if (__glibc_unlikely (cnt < 4)) { /* Still not enough bytes. Store the ones in the input buffer. */ state->__count &= ~7; state->__count |= cnt; return __GCONV_INCOMPLETE_INPUT; } #if __BYTE_ORDER == __BIG_ENDIAN (*outptrp)[0] = state->__value.__wchb[3]; (*outptrp)[1] = state->__value.__wchb[2]; (*outptrp)[2] = state->__value.__wchb[1]; (*outptrp)[3] = state->__value.__wchb[0]; #else /* XXX unaligned */ (*outptrp)[0] = state->__value.__wchb[0]; (*outptrp)[1] = state->__value.__wchb[1]; (*outptrp)[2] = state->__value.__wchb[2]; (*outptrp)[3] = state->__value.__wchb[3]; #endif *outptrp += 4; /* Clear the state buffer. */ state->__count &= ~7; return __GCONV_OK; } #include /* And finally from UCS4-LE to the internal encoding. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP ucs4le_internal_loop #define TO_LOOP ucs4le_internal_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_ucs4le_internal #define ONE_DIRECTION 0 static inline int __attribute ((always_inline)) ucs4le_internal_loop (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { int flags = step_data->__flags; const unsigned char *inptr = *inptrp; unsigned char *outptr = *outptrp; int result; for (; inptr + 4 <= inend && outptr + 4 <= outend; inptr += 4) { uint32_t inval = get32 (inptr); #if __BYTE_ORDER == __BIG_ENDIAN inval = __builtin_bswap32 (inval); #endif if (__glibc_unlikely (inval > 0x7fffffff)) { /* The value is too large. We don't try transliteration here since this is not an error because of the lack of possibilities to represent the result. This is a genuine bug in the input since UCS4 does not allow such values. */ if (irreversible == NULL) /* We are transliterating, don't try to correct anything. */ return __GCONV_ILLEGAL_INPUT; if (flags & __GCONV_IGNORE_ERRORS) { /* Just ignore this character. */ ++*irreversible; continue; } *inptrp = inptr; *outptrp = outptr; return __GCONV_ILLEGAL_INPUT; } put32 (outptr, inval); outptr += sizeof (uint32_t); } *inptrp = inptr; *outptrp = outptr; /* Determine the status. */ if (*inptrp == inend) result = __GCONV_EMPTY_INPUT; else if (*inptrp + 4 > inend) result = __GCONV_INCOMPLETE_INPUT; else { assert (*outptrp + 4 > outend); result = __GCONV_FULL_OUTPUT; } return result; } static inline int __attribute ((always_inline)) ucs4le_internal_loop_single (struct __gconv_step *step, struct __gconv_step_data *step_data, const unsigned char **inptrp, const unsigned char *inend, unsigned char **outptrp, const unsigned char *outend, size_t *irreversible) { mbstate_t *state = step_data->__statep; int flags = step_data->__flags; size_t cnt = state->__count & 7; while (*inptrp < inend && cnt < 4) state->__value.__wchb[cnt++] = *(*inptrp)++; if (__glibc_unlikely (cnt < 4)) { /* Still not enough bytes. Store the ones in the input buffer. */ state->__count &= ~7; state->__count |= cnt; return __GCONV_INCOMPLETE_INPUT; } if (__builtin_expect (((unsigned char *) state->__value.__wchb)[3] > 0x80, 0)) { /* The value is too large. We don't try transliteration here since this is not an error because of the lack of possibilities to represent the result. This is a genuine bug in the input since UCS4 does not allow such values. */ if (!(flags & __GCONV_IGNORE_ERRORS)) return __GCONV_ILLEGAL_INPUT; } else { #if __BYTE_ORDER == __BIG_ENDIAN (*outptrp)[0] = state->__value.__wchb[3]; (*outptrp)[1] = state->__value.__wchb[2]; (*outptrp)[2] = state->__value.__wchb[1]; (*outptrp)[3] = state->__value.__wchb[0]; #else (*outptrp)[0] = state->__value.__wchb[0]; (*outptrp)[1] = state->__value.__wchb[1]; (*outptrp)[2] = state->__value.__wchb[2]; (*outptrp)[3] = state->__value.__wchb[3]; #endif *outptrp += 4; } /* Clear the state buffer. */ state->__count &= ~7; return __GCONV_OK; } #include /* Convert from ISO 646-IRV to the internal (UCS4-like) format. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 1 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP ascii_internal_loop #define TO_LOOP ascii_internal_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_ascii_internal #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ if (__glibc_unlikely (*inptr > '\x7f')) \ { \ /* The value is too large. We don't try transliteration here since \ this is not an error because of the lack of possibilities to \ represent the result. This is a genuine bug in the input since \ ASCII does not allow such values. */ \ STANDARD_FROM_LOOP_ERR_HANDLER (1); \ } \ else \ { \ /* It's an one byte sequence. */ \ *((uint32_t *) outptr) = *inptr++; \ outptr += sizeof (uint32_t); \ } \ } #define LOOP_NEED_FLAGS #include #include /* Convert from the internal (UCS4-like) format to ISO 646-IRV. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 1 #define FROM_DIRECTION 1 #define FROM_LOOP internal_ascii_loop #define TO_LOOP internal_ascii_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_internal_ascii #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ if (__glibc_unlikely (*((const uint32_t *) inptr) > 0x7f)) \ { \ UNICODE_TAG_HANDLER (*((const uint32_t *) inptr), 4); \ STANDARD_TO_LOOP_ERR_HANDLER (4); \ } \ else \ { \ /* It's an one byte sequence. */ \ *outptr++ = *((const uint32_t *) inptr); \ inptr += sizeof (uint32_t); \ } \ } #define LOOP_NEED_FLAGS #include #include /* Convert from the internal (UCS4-like) format to UTF-8. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 1 #define MAX_NEEDED_TO 6 #define FROM_DIRECTION 1 #define FROM_LOOP internal_utf8_loop #define TO_LOOP internal_utf8_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_internal_utf8 #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define MAX_NEEDED_OUTPUT MAX_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ uint32_t wc = *((const uint32_t *) inptr); \ \ if (__glibc_likely (wc < 0x80)) \ /* It's an one byte sequence. */ \ *outptr++ = (unsigned char) wc; \ else if (__glibc_likely (wc <= 0x7fffffff \ && (wc < 0xd800 || wc > 0xdfff))) \ { \ size_t step; \ unsigned char *start; \ \ for (step = 2; step < 6; ++step) \ if ((wc & (~(uint32_t)0 << (5 * step + 1))) == 0) \ break; \ \ if (__glibc_unlikely (outptr + step > outend)) \ { \ /* Too long. */ \ result = __GCONV_FULL_OUTPUT; \ break; \ } \ \ start = outptr; \ *outptr = (unsigned char) (~0xff >> step); \ outptr += step; \ do \ { \ start[--step] = 0x80 | (wc & 0x3f); \ wc >>= 6; \ } \ while (step > 1); \ start[0] |= wc; \ } \ else \ { \ STANDARD_TO_LOOP_ERR_HANDLER (4); \ } \ \ inptr += 4; \ } #define LOOP_NEED_FLAGS #include #include /* Convert from UTF-8 to the internal (UCS4-like) format. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 1 #define MAX_NEEDED_FROM 6 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP utf8_internal_loop #define TO_LOOP utf8_internal_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_utf8_internal #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MAX_NEEDED_INPUT MAX_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ /* Next input byte. */ \ uint32_t ch = *inptr; \ \ if (__glibc_likely (ch < 0x80)) \ { \ /* One byte sequence. */ \ ++inptr; \ } \ else \ { \ unsigned int cnt; \ unsigned int i; \ \ if (ch >= 0xc2 && ch < 0xe0) \ { \ /* We expect two bytes. The first byte cannot be 0xc0 or 0xc1, \ otherwise the wide character could have been represented \ using a single byte. */ \ cnt = 2; \ ch &= 0x1f; \ } \ else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \ { \ /* We expect three bytes. */ \ cnt = 3; \ ch &= 0x0f; \ } \ else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \ { \ /* We expect four bytes. */ \ cnt = 4; \ ch &= 0x07; \ } \ else if (__glibc_likely ((ch & 0xfc) == 0xf8)) \ { \ /* We expect five bytes. */ \ cnt = 5; \ ch &= 0x03; \ } \ else if (__glibc_likely ((ch & 0xfe) == 0xfc)) \ { \ /* We expect six bytes. */ \ cnt = 6; \ ch &= 0x01; \ } \ else \ { \ /* Search the end of this ill-formed UTF-8 character. This \ is the next byte with (x & 0xc0) != 0x80. */ \ i = 0; \ do \ ++i; \ while (inptr + i < inend \ && (*(inptr + i) & 0xc0) == 0x80 \ && i < 5); \ \ errout: \ STANDARD_FROM_LOOP_ERR_HANDLER (i); \ } \ \ if (__glibc_unlikely (inptr + cnt > inend)) \ { \ /* We don't have enough input. But before we report that check \ that all the bytes are correct. */ \ for (i = 1; inptr + i < inend; ++i) \ if ((inptr[i] & 0xc0) != 0x80) \ break; \ \ if (__glibc_likely (inptr + i == inend)) \ { \ result = __GCONV_INCOMPLETE_INPUT; \ break; \ } \ \ goto errout; \ } \ \ /* Read the possible remaining bytes. */ \ for (i = 1; i < cnt; ++i) \ { \ uint32_t byte = inptr[i]; \ \ if ((byte & 0xc0) != 0x80) \ /* This is an illegal encoding. */ \ break; \ \ ch <<= 6; \ ch |= byte & 0x3f; \ } \ \ /* If i < cnt, some trail byte was not >= 0x80, < 0xc0. \ If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could \ have been represented with fewer than cnt bytes. */ \ if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0) \ /* Do not accept UTF-16 surrogates. */ \ || (ch >= 0xd800 && ch <= 0xdfff)) \ { \ /* This is an illegal encoding. */ \ goto errout; \ } \ \ inptr += cnt; \ } \ \ /* Now adjust the pointers and store the result. */ \ *((uint32_t *) outptr) = ch; \ outptr += sizeof (uint32_t); \ } #define LOOP_NEED_FLAGS #define STORE_REST \ { \ /* We store the remaining bytes while converting them into the UCS4 \ format. We can assume that the first byte in the buffer is \ correct and that it requires a larger number of bytes than there \ are in the input buffer. */ \ wint_t ch = **inptrp; \ size_t cnt, r; \ \ state->__count = inend - *inptrp; \ \ assert (ch != 0xc0 && ch != 0xc1); \ if (ch >= 0xc2 && ch < 0xe0) \ { \ /* We expect two bytes. The first byte cannot be 0xc0 or \ 0xc1, otherwise the wide character could have been \ represented using a single byte. */ \ cnt = 2; \ ch &= 0x1f; \ } \ else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \ { \ /* We expect three bytes. */ \ cnt = 3; \ ch &= 0x0f; \ } \ else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \ { \ /* We expect four bytes. */ \ cnt = 4; \ ch &= 0x07; \ } \ else if (__glibc_likely ((ch & 0xfc) == 0xf8)) \ { \ /* We expect five bytes. */ \ cnt = 5; \ ch &= 0x03; \ } \ else \ { \ /* We expect six bytes. */ \ cnt = 6; \ ch &= 0x01; \ } \ \ /* The first byte is already consumed. */ \ r = cnt - 1; \ while (++(*inptrp) < inend) \ { \ ch <<= 6; \ ch |= **inptrp & 0x3f; \ --r; \ } \ \ /* Shift for the so far missing bytes. */ \ ch <<= r * 6; \ \ /* Store the number of bytes expected for the entire sequence. */ \ state->__count |= cnt << 8; \ \ /* Store the value. */ \ state->__value.__wch = ch; \ } #define UNPACK_BYTES \ { \ static const unsigned char inmask[5] = { 0xc0, 0xe0, 0xf0, 0xf8, 0xfc }; \ wint_t wch = state->__value.__wch; \ size_t ntotal = state->__count >> 8; \ \ inlen = state->__count & 255; \ \ bytebuf[0] = inmask[ntotal - 2]; \ \ do \ { \ if (--ntotal < inlen) \ bytebuf[ntotal] = 0x80 | (wch & 0x3f); \ wch >>= 6; \ } \ while (ntotal > 1); \ \ bytebuf[0] |= wch; \ } #define CLEAR_STATE \ state->__count = 0 #include #include /* Convert from UCS2 to the internal (UCS4-like) format. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 2 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP ucs2_internal_loop #define TO_LOOP ucs2_internal_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_ucs2_internal #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ uint16_t u1 = get16 (inptr); \ \ if (__glibc_unlikely (u1 >= 0xd800 && u1 < 0xe000)) \ { \ /* Surrogate characters in UCS-2 input are not valid. Reject \ them. (Catching this here is not security relevant.) */ \ STANDARD_FROM_LOOP_ERR_HANDLER (2); \ } \ \ *((uint32_t *) outptr) = u1; \ outptr += sizeof (uint32_t); \ inptr += 2; \ } #define LOOP_NEED_FLAGS #include #include /* Convert from the internal (UCS4-like) format to UCS2. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 2 #define FROM_DIRECTION 1 #define FROM_LOOP internal_ucs2_loop #define TO_LOOP internal_ucs2_loop /* This is not used. */ #define FUNCTION_NAME __gconv_transform_internal_ucs2 #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ uint32_t val = *((const uint32_t *) inptr); \ \ if (__glibc_unlikely (val >= 0x10000)) \ { \ UNICODE_TAG_HANDLER (val, 4); \ STANDARD_TO_LOOP_ERR_HANDLER (4); \ } \ else if (__glibc_unlikely (val >= 0xd800 && val < 0xe000)) \ { \ /* Surrogate characters in UCS-4 input are not valid. \ We must catch this, because the UCS-2 output might be \ interpreted as UTF-16 by other programs. If we let \ surrogates pass through, attackers could make a security \ hole exploit by synthesizing any desired plane 1-16 \ character. */ \ result = __GCONV_ILLEGAL_INPUT; \ if (! ignore_errors_p ()) \ break; \ inptr += 4; \ ++*irreversible; \ continue; \ } \ else \ { \ put16 (outptr, val); \ outptr += sizeof (uint16_t); \ inptr += 4; \ } \ } #define LOOP_NEED_FLAGS #include #include /* Convert from UCS2 in other endianness to the internal (UCS4-like) format. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 2 #define MIN_NEEDED_TO 4 #define FROM_DIRECTION 1 #define FROM_LOOP ucs2reverse_internal_loop #define TO_LOOP ucs2reverse_internal_loop/* This is not used.*/ #define FUNCTION_NAME __gconv_transform_ucs2reverse_internal #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ uint16_t u1 = bswap_16 (get16 (inptr)); \ \ if (__glibc_unlikely (u1 >= 0xd800 && u1 < 0xe000)) \ { \ /* Surrogate characters in UCS-2 input are not valid. Reject \ them. (Catching this here is not security relevant.) */ \ if (! ignore_errors_p ()) \ { \ result = __GCONV_ILLEGAL_INPUT; \ break; \ } \ inptr += 2; \ ++*irreversible; \ continue; \ } \ \ *((uint32_t *) outptr) = u1; \ outptr += sizeof (uint32_t); \ inptr += 2; \ } #define LOOP_NEED_FLAGS #include #include /* Convert from the internal (UCS4-like) format to UCS2 in other endianness. */ #define DEFINE_INIT 0 #define DEFINE_FINI 0 #define MIN_NEEDED_FROM 4 #define MIN_NEEDED_TO 2 #define FROM_DIRECTION 1 #define FROM_LOOP internal_ucs2reverse_loop #define TO_LOOP internal_ucs2reverse_loop/* This is not used.*/ #define FUNCTION_NAME __gconv_transform_internal_ucs2reverse #define ONE_DIRECTION 1 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO #define LOOPFCT FROM_LOOP #define BODY \ { \ uint32_t val = *((const uint32_t *) inptr); \ if (__glibc_unlikely (val >= 0x10000)) \ { \ UNICODE_TAG_HANDLER (val, 4); \ STANDARD_TO_LOOP_ERR_HANDLER (4); \ } \ else if (__glibc_unlikely (val >= 0xd800 && val < 0xe000)) \ { \ /* Surrogate characters in UCS-4 input are not valid. \ We must catch this, because the UCS-2 output might be \ interpreted as UTF-16 by other programs. If we let \ surrogates pass through, attackers could make a security \ hole exploit by synthesizing any desired plane 1-16 \ character. */ \ if (! ignore_errors_p ()) \ { \ result = __GCONV_ILLEGAL_INPUT; \ break; \ } \ inptr += 4; \ ++*irreversible; \ continue; \ } \ else \ { \ put16 (outptr, bswap_16 (val)); \ outptr += sizeof (uint16_t); \ inptr += 4; \ } \ } #define LOOP_NEED_FLAGS #include #include