| /* Character set conversion with error handling. |
| Copyright (C) 2001-2020 Free Software Foundation, Inc. |
| Written by Bruno Haible and Simon Josefsson. |
| |
| 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 3 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, see <https://www.gnu.org/licenses/>. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include "striconveh.h" |
| |
| #include <errno.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #if HAVE_ICONV |
| # include <iconv.h> |
| # include "unistr.h" |
| #endif |
| |
| #include "c-strcase.h" |
| #include "c-strcaseeq.h" |
| |
| #ifndef SIZE_MAX |
| # define SIZE_MAX ((size_t) -1) |
| #endif |
| |
| |
| #if HAVE_ICONV |
| |
| /* The caller must provide an iconveh_t, not just an iconv_t, because when a |
| conversion error occurs, we may have to determine the Unicode representation |
| of the inconvertible character. */ |
| |
| int |
| iconveh_open (const char *to_codeset, const char *from_codeset, iconveh_t *cdp) |
| { |
| iconv_t cd; |
| iconv_t cd1; |
| iconv_t cd2; |
| |
| /* Avoid glibc-2.1 bug with EUC-KR. */ |
| # if ((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \ |
| && !defined _LIBICONV_VERSION |
| if (c_strcasecmp (from_codeset, "EUC-KR") == 0 |
| || c_strcasecmp (to_codeset, "EUC-KR") == 0) |
| { |
| errno = EINVAL; |
| return -1; |
| } |
| # endif |
| |
| cd = iconv_open (to_codeset, from_codeset); |
| |
| if (STRCASEEQ (from_codeset, "UTF-8", 'U','T','F','-','8',0,0,0,0)) |
| cd1 = (iconv_t)(-1); |
| else |
| { |
| cd1 = iconv_open ("UTF-8", from_codeset); |
| if (cd1 == (iconv_t)(-1)) |
| { |
| int saved_errno = errno; |
| if (cd != (iconv_t)(-1)) |
| iconv_close (cd); |
| errno = saved_errno; |
| return -1; |
| } |
| } |
| |
| if (STRCASEEQ (to_codeset, "UTF-8", 'U','T','F','-','8',0,0,0,0) |
| # if (((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) || __GLIBC__ > 2) \ |
| && !defined __UCLIBC__) \ |
| || _LIBICONV_VERSION >= 0x0105 |
| || c_strcasecmp (to_codeset, "UTF-8//TRANSLIT") == 0 |
| # endif |
| ) |
| cd2 = (iconv_t)(-1); |
| else |
| { |
| cd2 = iconv_open (to_codeset, "UTF-8"); |
| if (cd2 == (iconv_t)(-1)) |
| { |
| int saved_errno = errno; |
| if (cd1 != (iconv_t)(-1)) |
| iconv_close (cd1); |
| if (cd != (iconv_t)(-1)) |
| iconv_close (cd); |
| errno = saved_errno; |
| return -1; |
| } |
| } |
| |
| cdp->cd = cd; |
| cdp->cd1 = cd1; |
| cdp->cd2 = cd2; |
| return 0; |
| } |
| |
| int |
| iconveh_close (const iconveh_t *cd) |
| { |
| if (cd->cd2 != (iconv_t)(-1) && iconv_close (cd->cd2) < 0) |
| { |
| /* Return -1, but preserve the errno from iconv_close. */ |
| int saved_errno = errno; |
| if (cd->cd1 != (iconv_t)(-1)) |
| iconv_close (cd->cd1); |
| if (cd->cd != (iconv_t)(-1)) |
| iconv_close (cd->cd); |
| errno = saved_errno; |
| return -1; |
| } |
| if (cd->cd1 != (iconv_t)(-1) && iconv_close (cd->cd1) < 0) |
| { |
| /* Return -1, but preserve the errno from iconv_close. */ |
| int saved_errno = errno; |
| if (cd->cd != (iconv_t)(-1)) |
| iconv_close (cd->cd); |
| errno = saved_errno; |
| return -1; |
| } |
| if (cd->cd != (iconv_t)(-1) && iconv_close (cd->cd) < 0) |
| return -1; |
| return 0; |
| } |
| |
| /* iconv_carefully is like iconv, except that it stops as soon as it encounters |
| a conversion error, and it returns in *INCREMENTED a boolean telling whether |
| it has incremented the input pointers past the error location. */ |
| # if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__) |
| /* Irix iconv() inserts a NUL byte if it cannot convert. |
| NetBSD iconv() inserts a question mark if it cannot convert. |
| Only GNU libiconv and GNU libc are known to prefer to fail rather |
| than doing a lossy conversion. */ |
| static size_t |
| iconv_carefully (iconv_t cd, |
| const char **inbuf, size_t *inbytesleft, |
| char **outbuf, size_t *outbytesleft, |
| bool *incremented) |
| { |
| const char *inptr = *inbuf; |
| const char *inptr_end = inptr + *inbytesleft; |
| char *outptr = *outbuf; |
| size_t outsize = *outbytesleft; |
| const char *inptr_before; |
| size_t res; |
| |
| do |
| { |
| size_t insize; |
| |
| inptr_before = inptr; |
| res = (size_t)(-1); |
| |
| for (insize = 1; inptr + insize <= inptr_end; insize++) |
| { |
| res = iconv (cd, |
| (ICONV_CONST char **) &inptr, &insize, |
| &outptr, &outsize); |
| if (!(res == (size_t)(-1) && errno == EINVAL)) |
| break; |
| /* iconv can eat up a shift sequence but give EINVAL while attempting |
| to convert the first character. E.g. libiconv does this. */ |
| if (inptr > inptr_before) |
| { |
| res = 0; |
| break; |
| } |
| } |
| |
| if (res == 0) |
| { |
| *outbuf = outptr; |
| *outbytesleft = outsize; |
| } |
| } |
| while (res == 0 && inptr < inptr_end); |
| |
| *inbuf = inptr; |
| *inbytesleft = inptr_end - inptr; |
| if (res != (size_t)(-1) && res > 0) |
| { |
| /* iconv() has already incremented INPTR. We cannot go back to a |
| previous INPTR, otherwise the state inside CD would become invalid, |
| if FROM_CODESET is a stateful encoding. So, tell the caller that |
| *INBUF has already been incremented. */ |
| *incremented = (inptr > inptr_before); |
| errno = EILSEQ; |
| return (size_t)(-1); |
| } |
| else |
| { |
| *incremented = false; |
| return res; |
| } |
| } |
| # else |
| # define iconv_carefully(cd, inbuf, inbytesleft, outbuf, outbytesleft, incremented) \ |
| (*(incremented) = false, \ |
| iconv (cd, (ICONV_CONST char **) (inbuf), inbytesleft, outbuf, outbytesleft)) |
| # endif |
| |
| /* iconv_carefully_1 is like iconv_carefully, except that it stops after |
| converting one character or one shift sequence. */ |
| static size_t |
| iconv_carefully_1 (iconv_t cd, |
| const char **inbuf, size_t *inbytesleft, |
| char **outbuf, size_t *outbytesleft, |
| bool *incremented) |
| { |
| const char *inptr_before = *inbuf; |
| const char *inptr = inptr_before; |
| const char *inptr_end = inptr_before + *inbytesleft; |
| char *outptr = *outbuf; |
| size_t outsize = *outbytesleft; |
| size_t res = (size_t)(-1); |
| size_t insize; |
| |
| for (insize = 1; inptr_before + insize <= inptr_end; insize++) |
| { |
| inptr = inptr_before; |
| res = iconv (cd, |
| (ICONV_CONST char **) &inptr, &insize, |
| &outptr, &outsize); |
| if (!(res == (size_t)(-1) && errno == EINVAL)) |
| break; |
| /* iconv can eat up a shift sequence but give EINVAL while attempting |
| to convert the first character. E.g. libiconv does this. */ |
| if (inptr > inptr_before) |
| { |
| res = 0; |
| break; |
| } |
| } |
| |
| *inbuf = inptr; |
| *inbytesleft = inptr_end - inptr; |
| # if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__) |
| /* Irix iconv() inserts a NUL byte if it cannot convert. |
| NetBSD iconv() inserts a question mark if it cannot convert. |
| Only GNU libiconv and GNU libc are known to prefer to fail rather |
| than doing a lossy conversion. */ |
| if (res != (size_t)(-1) && res > 0) |
| { |
| /* iconv() has already incremented INPTR. We cannot go back to a |
| previous INPTR, otherwise the state inside CD would become invalid, |
| if FROM_CODESET is a stateful encoding. So, tell the caller that |
| *INBUF has already been incremented. */ |
| *incremented = (inptr > inptr_before); |
| errno = EILSEQ; |
| return (size_t)(-1); |
| } |
| # endif |
| |
| if (res != (size_t)(-1)) |
| { |
| *outbuf = outptr; |
| *outbytesleft = outsize; |
| } |
| *incremented = false; |
| return res; |
| } |
| |
| /* utf8conv_carefully is like iconv, except that |
| - it converts from UTF-8 to UTF-8, |
| - it stops as soon as it encounters a conversion error, and it returns |
| in *INCREMENTED a boolean telling whether it has incremented the input |
| pointers past the error location, |
| - if one_character_only is true, it stops after converting one |
| character. */ |
| static size_t |
| utf8conv_carefully (bool one_character_only, |
| const char **inbuf, size_t *inbytesleft, |
| char **outbuf, size_t *outbytesleft, |
| bool *incremented) |
| { |
| const char *inptr = *inbuf; |
| size_t insize = *inbytesleft; |
| char *outptr = *outbuf; |
| size_t outsize = *outbytesleft; |
| size_t res; |
| |
| res = 0; |
| do |
| { |
| ucs4_t uc; |
| int n; |
| int m; |
| |
| n = u8_mbtoucr (&uc, (const uint8_t *) inptr, insize); |
| if (n < 0) |
| { |
| errno = (n == -2 ? EINVAL : EILSEQ); |
| n = u8_mbtouc (&uc, (const uint8_t *) inptr, insize); |
| inptr += n; |
| insize -= n; |
| res = (size_t)(-1); |
| *incremented = true; |
| break; |
| } |
| if (outsize == 0) |
| { |
| errno = E2BIG; |
| res = (size_t)(-1); |
| *incremented = false; |
| break; |
| } |
| m = u8_uctomb ((uint8_t *) outptr, uc, outsize); |
| if (m == -2) |
| { |
| errno = E2BIG; |
| res = (size_t)(-1); |
| *incremented = false; |
| break; |
| } |
| inptr += n; |
| insize -= n; |
| if (m == -1) |
| { |
| errno = EILSEQ; |
| res = (size_t)(-1); |
| *incremented = true; |
| break; |
| } |
| outptr += m; |
| outsize -= m; |
| } |
| while (!one_character_only && insize > 0); |
| |
| *inbuf = inptr; |
| *inbytesleft = insize; |
| *outbuf = outptr; |
| *outbytesleft = outsize; |
| return res; |
| } |
| |
| static int |
| mem_cd_iconveh_internal (const char *src, size_t srclen, |
| iconv_t cd, iconv_t cd1, iconv_t cd2, |
| enum iconv_ilseq_handler handler, |
| size_t extra_alloc, |
| size_t *offsets, |
| char **resultp, size_t *lengthp) |
| { |
| /* When a conversion error occurs, we cannot start using CD1 and CD2 at |
| this point: FROM_CODESET may be a stateful encoding like ISO-2022-KR. |
| Instead, we have to start afresh from the beginning of SRC. */ |
| /* Use a temporary buffer, so that for small strings, a single malloc() |
| call will be sufficient. */ |
| # define tmpbufsize 4096 |
| /* The alignment is needed when converting e.g. to glibc's WCHAR_T or |
| libiconv's UCS-4-INTERNAL encoding. */ |
| union { unsigned int align; char buf[tmpbufsize]; } tmp; |
| # define tmpbuf tmp.buf |
| |
| char *initial_result; |
| char *result; |
| size_t allocated; |
| size_t length; |
| size_t last_length = (size_t)(-1); /* only needed if offsets != NULL */ |
| |
| if (*resultp != NULL && *lengthp >= sizeof (tmpbuf)) |
| { |
| initial_result = *resultp; |
| allocated = *lengthp; |
| } |
| else |
| { |
| initial_result = tmpbuf; |
| allocated = sizeof (tmpbuf); |
| } |
| result = initial_result; |
| |
| /* Test whether a direct conversion is possible at all. */ |
| if (cd == (iconv_t)(-1)) |
| goto indirectly; |
| |
| if (offsets != NULL) |
| { |
| size_t i; |
| |
| for (i = 0; i < srclen; i++) |
| offsets[i] = (size_t)(-1); |
| |
| last_length = (size_t)(-1); |
| } |
| length = 0; |
| |
| /* First, try a direct conversion, and see whether a conversion error |
| occurs at all. */ |
| { |
| const char *inptr = src; |
| size_t insize = srclen; |
| |
| /* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug. */ |
| # if defined _LIBICONV_VERSION \ |
| || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \ |
| || defined __sun) |
| /* Set to the initial state. */ |
| iconv (cd, NULL, NULL, NULL, NULL); |
| # endif |
| |
| while (insize > 0) |
| { |
| char *outptr = result + length; |
| size_t outsize = allocated - extra_alloc - length; |
| bool incremented; |
| size_t res; |
| bool grow; |
| |
| if (offsets != NULL) |
| { |
| if (length != last_length) /* ensure that offset[] be increasing */ |
| { |
| offsets[inptr - src] = length; |
| last_length = length; |
| } |
| res = iconv_carefully_1 (cd, |
| &inptr, &insize, |
| &outptr, &outsize, |
| &incremented); |
| } |
| else |
| /* Use iconv_carefully instead of iconv here, because: |
| - If TO_CODESET is UTF-8, we can do the error handling in this |
| loop, no need for a second loop, |
| - With iconv() implementations other than GNU libiconv and GNU |
| libc, if we use iconv() in a big swoop, checking for an E2BIG |
| return, we lose the number of irreversible conversions. */ |
| res = iconv_carefully (cd, |
| &inptr, &insize, |
| &outptr, &outsize, |
| &incremented); |
| |
| length = outptr - result; |
| grow = (length + extra_alloc > allocated / 2); |
| if (res == (size_t)(-1)) |
| { |
| if (errno == E2BIG) |
| grow = true; |
| else if (errno == EINVAL) |
| break; |
| else if (errno == EILSEQ && handler != iconveh_error) |
| { |
| if (cd2 == (iconv_t)(-1)) |
| { |
| /* TO_CODESET is UTF-8. */ |
| /* Error handling can produce up to 1 byte of output. */ |
| if (length + 1 + extra_alloc > allocated) |
| { |
| char *memory; |
| |
| allocated = 2 * allocated; |
| if (length + 1 + extra_alloc > allocated) |
| abort (); |
| if (result == initial_result) |
| memory = (char *) malloc (allocated); |
| else |
| memory = (char *) realloc (result, allocated); |
| if (memory == NULL) |
| { |
| if (result != initial_result) |
| free (result); |
| errno = ENOMEM; |
| return -1; |
| } |
| if (result == initial_result) |
| memcpy (memory, initial_result, length); |
| result = memory; |
| grow = false; |
| } |
| /* The input is invalid in FROM_CODESET. Eat up one byte |
| and emit a question mark. */ |
| if (!incremented) |
| { |
| if (insize == 0) |
| abort (); |
| inptr++; |
| insize--; |
| } |
| result[length] = '?'; |
| length++; |
| } |
| else |
| goto indirectly; |
| } |
| else |
| { |
| if (result != initial_result) |
| { |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| } |
| return -1; |
| } |
| } |
| if (insize == 0) |
| break; |
| if (grow) |
| { |
| char *memory; |
| |
| allocated = 2 * allocated; |
| if (result == initial_result) |
| memory = (char *) malloc (allocated); |
| else |
| memory = (char *) realloc (result, allocated); |
| if (memory == NULL) |
| { |
| if (result != initial_result) |
| free (result); |
| errno = ENOMEM; |
| return -1; |
| } |
| if (result == initial_result) |
| memcpy (memory, initial_result, length); |
| result = memory; |
| } |
| } |
| } |
| |
| /* Now get the conversion state back to the initial state. |
| But avoid glibc-2.1 bug and Solaris 2.7 bug. */ |
| #if defined _LIBICONV_VERSION \ |
| || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \ |
| || defined __sun) |
| for (;;) |
| { |
| char *outptr = result + length; |
| size_t outsize = allocated - extra_alloc - length; |
| size_t res; |
| |
| res = iconv (cd, NULL, NULL, &outptr, &outsize); |
| length = outptr - result; |
| if (res == (size_t)(-1)) |
| { |
| if (errno == E2BIG) |
| { |
| char *memory; |
| |
| allocated = 2 * allocated; |
| if (result == initial_result) |
| memory = (char *) malloc (allocated); |
| else |
| memory = (char *) realloc (result, allocated); |
| if (memory == NULL) |
| { |
| if (result != initial_result) |
| free (result); |
| errno = ENOMEM; |
| return -1; |
| } |
| if (result == initial_result) |
| memcpy (memory, initial_result, length); |
| result = memory; |
| } |
| else |
| { |
| if (result != initial_result) |
| { |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| } |
| return -1; |
| } |
| } |
| else |
| break; |
| } |
| #endif |
| |
| /* The direct conversion succeeded. */ |
| goto done; |
| |
| indirectly: |
| /* The direct conversion failed. |
| Use a conversion through UTF-8. */ |
| if (offsets != NULL) |
| { |
| size_t i; |
| |
| for (i = 0; i < srclen; i++) |
| offsets[i] = (size_t)(-1); |
| |
| last_length = (size_t)(-1); |
| } |
| length = 0; |
| { |
| const bool slowly = (offsets != NULL || handler == iconveh_error); |
| # define utf8bufsize 4096 /* may also be smaller or larger than tmpbufsize */ |
| char utf8buf[utf8bufsize + 1]; |
| size_t utf8len = 0; |
| const char *in1ptr = src; |
| size_t in1size = srclen; |
| bool do_final_flush1 = true; |
| bool do_final_flush2 = true; |
| |
| /* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug. */ |
| # if defined _LIBICONV_VERSION \ |
| || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \ |
| || defined __sun) |
| /* Set to the initial state. */ |
| if (cd1 != (iconv_t)(-1)) |
| iconv (cd1, NULL, NULL, NULL, NULL); |
| if (cd2 != (iconv_t)(-1)) |
| iconv (cd2, NULL, NULL, NULL, NULL); |
| # endif |
| |
| while (in1size > 0 || do_final_flush1 || utf8len > 0 || do_final_flush2) |
| { |
| char *out1ptr = utf8buf + utf8len; |
| size_t out1size = utf8bufsize - utf8len; |
| bool incremented1; |
| size_t res1; |
| int errno1; |
| |
| /* Conversion step 1: from FROM_CODESET to UTF-8. */ |
| if (in1size > 0) |
| { |
| if (offsets != NULL |
| && length != last_length) /* ensure that offset[] be increasing */ |
| { |
| offsets[in1ptr - src] = length; |
| last_length = length; |
| } |
| if (cd1 != (iconv_t)(-1)) |
| { |
| if (slowly) |
| res1 = iconv_carefully_1 (cd1, |
| &in1ptr, &in1size, |
| &out1ptr, &out1size, |
| &incremented1); |
| else |
| res1 = iconv_carefully (cd1, |
| &in1ptr, &in1size, |
| &out1ptr, &out1size, |
| &incremented1); |
| } |
| else |
| { |
| /* FROM_CODESET is UTF-8. */ |
| res1 = utf8conv_carefully (slowly, |
| &in1ptr, &in1size, |
| &out1ptr, &out1size, |
| &incremented1); |
| } |
| } |
| else if (do_final_flush1) |
| { |
| /* Now get the conversion state of CD1 back to the initial state. |
| But avoid glibc-2.1 bug and Solaris 2.7 bug. */ |
| # if defined _LIBICONV_VERSION \ |
| || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \ |
| || defined __sun) |
| if (cd1 != (iconv_t)(-1)) |
| res1 = iconv (cd1, NULL, NULL, &out1ptr, &out1size); |
| else |
| # endif |
| res1 = 0; |
| do_final_flush1 = false; |
| incremented1 = true; |
| } |
| else |
| { |
| res1 = 0; |
| incremented1 = true; |
| } |
| if (res1 == (size_t)(-1) |
| && !(errno == E2BIG || errno == EINVAL || errno == EILSEQ)) |
| { |
| if (result != initial_result) |
| { |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| } |
| return -1; |
| } |
| if (res1 == (size_t)(-1) |
| && errno == EILSEQ && handler != iconveh_error) |
| { |
| /* The input is invalid in FROM_CODESET. Eat up one byte and |
| emit a question mark. Room for the question mark was allocated |
| at the end of utf8buf. */ |
| if (!incremented1) |
| { |
| if (in1size == 0) |
| abort (); |
| in1ptr++; |
| in1size--; |
| } |
| *out1ptr++ = '?'; |
| res1 = 0; |
| } |
| errno1 = errno; |
| utf8len = out1ptr - utf8buf; |
| |
| if (offsets != NULL |
| || in1size == 0 |
| || utf8len > utf8bufsize / 2 |
| || (res1 == (size_t)(-1) && errno1 == E2BIG)) |
| { |
| /* Conversion step 2: from UTF-8 to TO_CODESET. */ |
| const char *in2ptr = utf8buf; |
| size_t in2size = utf8len; |
| |
| while (in2size > 0 |
| || (in1size == 0 && !do_final_flush1 && do_final_flush2)) |
| { |
| char *out2ptr = result + length; |
| size_t out2size = allocated - extra_alloc - length; |
| bool incremented2; |
| size_t res2; |
| bool grow; |
| |
| if (in2size > 0) |
| { |
| if (cd2 != (iconv_t)(-1)) |
| res2 = iconv_carefully (cd2, |
| &in2ptr, &in2size, |
| &out2ptr, &out2size, |
| &incremented2); |
| else |
| /* TO_CODESET is UTF-8. */ |
| res2 = utf8conv_carefully (false, |
| &in2ptr, &in2size, |
| &out2ptr, &out2size, |
| &incremented2); |
| } |
| else /* in1size == 0 && !do_final_flush1 |
| && in2size == 0 && do_final_flush2 */ |
| { |
| /* Now get the conversion state of CD1 back to the initial |
| state. But avoid glibc-2.1 bug and Solaris 2.7 bug. */ |
| # if defined _LIBICONV_VERSION \ |
| || !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \ |
| || defined __sun) |
| if (cd2 != (iconv_t)(-1)) |
| res2 = iconv (cd2, NULL, NULL, &out2ptr, &out2size); |
| else |
| # endif |
| res2 = 0; |
| do_final_flush2 = false; |
| incremented2 = true; |
| } |
| |
| length = out2ptr - result; |
| grow = (length + extra_alloc > allocated / 2); |
| if (res2 == (size_t)(-1)) |
| { |
| if (errno == E2BIG) |
| grow = true; |
| else if (errno == EINVAL) |
| break; |
| else if (errno == EILSEQ && handler != iconveh_error) |
| { |
| /* Error handling can produce up to 10 bytes of ASCII |
| output. But TO_CODESET may be UCS-2, UTF-16 or |
| UCS-4, so use CD2 here as well. */ |
| char scratchbuf[10]; |
| size_t scratchlen; |
| ucs4_t uc; |
| const char *inptr; |
| size_t insize; |
| size_t res; |
| |
| if (incremented2) |
| { |
| if (u8_prev (&uc, (const uint8_t *) in2ptr, |
| (const uint8_t *) utf8buf) |
| == NULL) |
| abort (); |
| } |
| else |
| { |
| int n; |
| if (in2size == 0) |
| abort (); |
| n = u8_mbtouc_unsafe (&uc, (const uint8_t *) in2ptr, |
| in2size); |
| in2ptr += n; |
| in2size -= n; |
| } |
| |
| if (handler == iconveh_escape_sequence) |
| { |
| static char hex[16] = "0123456789ABCDEF"; |
| scratchlen = 0; |
| scratchbuf[scratchlen++] = '\\'; |
| if (uc < 0x10000) |
| scratchbuf[scratchlen++] = 'u'; |
| else |
| { |
| scratchbuf[scratchlen++] = 'U'; |
| scratchbuf[scratchlen++] = hex[(uc>>28) & 15]; |
| scratchbuf[scratchlen++] = hex[(uc>>24) & 15]; |
| scratchbuf[scratchlen++] = hex[(uc>>20) & 15]; |
| scratchbuf[scratchlen++] = hex[(uc>>16) & 15]; |
| } |
| scratchbuf[scratchlen++] = hex[(uc>>12) & 15]; |
| scratchbuf[scratchlen++] = hex[(uc>>8) & 15]; |
| scratchbuf[scratchlen++] = hex[(uc>>4) & 15]; |
| scratchbuf[scratchlen++] = hex[uc & 15]; |
| } |
| else |
| { |
| scratchbuf[0] = '?'; |
| scratchlen = 1; |
| } |
| |
| inptr = scratchbuf; |
| insize = scratchlen; |
| if (cd2 != (iconv_t)(-1)) |
| res = iconv (cd2, |
| (ICONV_CONST char **) &inptr, &insize, |
| &out2ptr, &out2size); |
| else |
| { |
| /* TO_CODESET is UTF-8. */ |
| if (out2size >= insize) |
| { |
| memcpy (out2ptr, inptr, insize); |
| out2ptr += insize; |
| out2size -= insize; |
| inptr += insize; |
| insize = 0; |
| res = 0; |
| } |
| else |
| { |
| errno = E2BIG; |
| res = (size_t)(-1); |
| } |
| } |
| length = out2ptr - result; |
| if (res == (size_t)(-1) && errno == E2BIG) |
| { |
| char *memory; |
| |
| allocated = 2 * allocated; |
| if (length + 1 + extra_alloc > allocated) |
| abort (); |
| if (result == initial_result) |
| memory = (char *) malloc (allocated); |
| else |
| memory = (char *) realloc (result, allocated); |
| if (memory == NULL) |
| { |
| if (result != initial_result) |
| free (result); |
| errno = ENOMEM; |
| return -1; |
| } |
| if (result == initial_result) |
| memcpy (memory, initial_result, length); |
| result = memory; |
| grow = false; |
| |
| out2ptr = result + length; |
| out2size = allocated - extra_alloc - length; |
| if (cd2 != (iconv_t)(-1)) |
| res = iconv (cd2, |
| (ICONV_CONST char **) &inptr, |
| &insize, |
| &out2ptr, &out2size); |
| else |
| { |
| /* TO_CODESET is UTF-8. */ |
| if (!(out2size >= insize)) |
| abort (); |
| memcpy (out2ptr, inptr, insize); |
| out2ptr += insize; |
| out2size -= insize; |
| inptr += insize; |
| insize = 0; |
| res = 0; |
| } |
| length = out2ptr - result; |
| } |
| # if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__) |
| /* Irix iconv() inserts a NUL byte if it cannot convert. |
| NetBSD iconv() inserts a question mark if it cannot |
| convert. |
| Only GNU libiconv and GNU libc are known to prefer |
| to fail rather than doing a lossy conversion. */ |
| if (res != (size_t)(-1) && res > 0) |
| { |
| errno = EILSEQ; |
| res = (size_t)(-1); |
| } |
| # endif |
| if (res == (size_t)(-1)) |
| { |
| /* Failure converting the ASCII replacement. */ |
| if (result != initial_result) |
| { |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| } |
| return -1; |
| } |
| } |
| else |
| { |
| if (result != initial_result) |
| { |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| } |
| return -1; |
| } |
| } |
| if (!(in2size > 0 |
| || (in1size == 0 && !do_final_flush1 && do_final_flush2))) |
| break; |
| if (grow) |
| { |
| char *memory; |
| |
| allocated = 2 * allocated; |
| if (result == initial_result) |
| memory = (char *) malloc (allocated); |
| else |
| memory = (char *) realloc (result, allocated); |
| if (memory == NULL) |
| { |
| if (result != initial_result) |
| free (result); |
| errno = ENOMEM; |
| return -1; |
| } |
| if (result == initial_result) |
| memcpy (memory, initial_result, length); |
| result = memory; |
| } |
| } |
| |
| /* Move the remaining bytes to the beginning of utf8buf. */ |
| if (in2size > 0) |
| memmove (utf8buf, in2ptr, in2size); |
| utf8len = in2size; |
| } |
| |
| if (res1 == (size_t)(-1)) |
| { |
| if (errno1 == EINVAL) |
| in1size = 0; |
| else if (errno1 == EILSEQ) |
| { |
| if (result != initial_result) |
| free (result); |
| errno = errno1; |
| return -1; |
| } |
| } |
| } |
| # undef utf8bufsize |
| } |
| |
| done: |
| /* Now the final memory allocation. */ |
| if (result == tmpbuf) |
| { |
| size_t memsize = length + extra_alloc; |
| |
| if (*resultp != NULL && *lengthp >= memsize) |
| result = *resultp; |
| else |
| { |
| char *memory; |
| |
| memory = (char *) malloc (memsize > 0 ? memsize : 1); |
| if (memory != NULL) |
| result = memory; |
| else |
| { |
| errno = ENOMEM; |
| return -1; |
| } |
| } |
| memcpy (result, tmpbuf, length); |
| } |
| else if (result != *resultp && length + extra_alloc < allocated) |
| { |
| /* Shrink the allocated memory if possible. */ |
| size_t memsize = length + extra_alloc; |
| char *memory; |
| |
| memory = (char *) realloc (result, memsize > 0 ? memsize : 1); |
| if (memory != NULL) |
| result = memory; |
| } |
| *resultp = result; |
| *lengthp = length; |
| return 0; |
| # undef tmpbuf |
| # undef tmpbufsize |
| } |
| |
| int |
| mem_cd_iconveh (const char *src, size_t srclen, |
| const iconveh_t *cd, |
| enum iconv_ilseq_handler handler, |
| size_t *offsets, |
| char **resultp, size_t *lengthp) |
| { |
| return mem_cd_iconveh_internal (src, srclen, cd->cd, cd->cd1, cd->cd2, |
| handler, 0, offsets, resultp, lengthp); |
| } |
| |
| char * |
| str_cd_iconveh (const char *src, |
| const iconveh_t *cd, |
| enum iconv_ilseq_handler handler) |
| { |
| /* For most encodings, a trailing NUL byte in the input will be converted |
| to a trailing NUL byte in the output. But not for UTF-7. So that this |
| function is usable for UTF-7, we have to exclude the NUL byte from the |
| conversion and add it by hand afterwards. */ |
| char *result = NULL; |
| size_t length = 0; |
| int retval = mem_cd_iconveh_internal (src, strlen (src), |
| cd->cd, cd->cd1, cd->cd2, handler, 1, |
| NULL, &result, &length); |
| |
| if (retval < 0) |
| { |
| if (result != NULL) |
| { |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| } |
| return NULL; |
| } |
| |
| /* Add the terminating NUL byte. */ |
| result[length] = '\0'; |
| |
| return result; |
| } |
| |
| #endif |
| |
| int |
| mem_iconveh (const char *src, size_t srclen, |
| const char *from_codeset, const char *to_codeset, |
| enum iconv_ilseq_handler handler, |
| size_t *offsets, |
| char **resultp, size_t *lengthp) |
| { |
| if (srclen == 0) |
| { |
| /* Nothing to convert. */ |
| *lengthp = 0; |
| return 0; |
| } |
| else if (offsets == NULL && c_strcasecmp (from_codeset, to_codeset) == 0) |
| { |
| char *result; |
| |
| if (*resultp != NULL && *lengthp >= srclen) |
| result = *resultp; |
| else |
| { |
| result = (char *) malloc (srclen); |
| if (result == NULL) |
| { |
| errno = ENOMEM; |
| return -1; |
| } |
| } |
| memcpy (result, src, srclen); |
| *resultp = result; |
| *lengthp = srclen; |
| return 0; |
| } |
| else |
| { |
| #if HAVE_ICONV |
| iconveh_t cd; |
| char *result; |
| size_t length; |
| int retval; |
| |
| if (iconveh_open (to_codeset, from_codeset, &cd) < 0) |
| return -1; |
| |
| result = *resultp; |
| length = *lengthp; |
| retval = mem_cd_iconveh (src, srclen, &cd, handler, offsets, |
| &result, &length); |
| |
| if (retval < 0) |
| { |
| /* Close cd, but preserve the errno from str_cd_iconv. */ |
| int saved_errno = errno; |
| iconveh_close (&cd); |
| errno = saved_errno; |
| } |
| else |
| { |
| if (iconveh_close (&cd) < 0) |
| { |
| /* Return -1, but free the allocated memory, and while doing |
| that, preserve the errno from iconveh_close. */ |
| int saved_errno = errno; |
| if (result != *resultp && result != NULL) |
| free (result); |
| errno = saved_errno; |
| return -1; |
| } |
| *resultp = result; |
| *lengthp = length; |
| } |
| return retval; |
| #else |
| /* This is a different error code than if iconv_open existed but didn't |
| support from_codeset and to_codeset, so that the caller can emit |
| an error message such as |
| "iconv() is not supported. Installing GNU libiconv and |
| then reinstalling this package would fix this." */ |
| errno = ENOSYS; |
| return -1; |
| #endif |
| } |
| } |
| |
| char * |
| str_iconveh (const char *src, |
| const char *from_codeset, const char *to_codeset, |
| enum iconv_ilseq_handler handler) |
| { |
| if (*src == '\0' || c_strcasecmp (from_codeset, to_codeset) == 0) |
| { |
| char *result = strdup (src); |
| |
| if (result == NULL) |
| errno = ENOMEM; |
| return result; |
| } |
| else |
| { |
| #if HAVE_ICONV |
| iconveh_t cd; |
| char *result; |
| |
| if (iconveh_open (to_codeset, from_codeset, &cd) < 0) |
| return NULL; |
| |
| result = str_cd_iconveh (src, &cd, handler); |
| |
| if (result == NULL) |
| { |
| /* Close cd, but preserve the errno from str_cd_iconv. */ |
| int saved_errno = errno; |
| iconveh_close (&cd); |
| errno = saved_errno; |
| } |
| else |
| { |
| if (iconveh_close (&cd) < 0) |
| { |
| /* Return NULL, but free the allocated memory, and while doing |
| that, preserve the errno from iconveh_close. */ |
| int saved_errno = errno; |
| free (result); |
| errno = saved_errno; |
| return NULL; |
| } |
| } |
| return result; |
| #else |
| /* This is a different error code than if iconv_open existed but didn't |
| support from_codeset and to_codeset, so that the caller can emit |
| an error message such as |
| "iconv() is not supported. Installing GNU libiconv and |
| then reinstalling this package would fix this." */ |
| errno = ENOSYS; |
| return NULL; |
| #endif |
| } |
| } |
