-/*
- * Copyright (c) 1997-2003, Index Data
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2008 Index Data
* See the file LICENSE for details.
+ */
+/**
+ * \file
+ * \brief Implements simple ICONV
+ *
+ * This implements an interface similar to that of iconv and
+ * is used by YAZ to interface with iconv (if present).
+ * For systems where iconv is not present, this layer
+ * provides a few important conversions: UTF-8, MARC-8, Latin-1.
*
- * $Id: siconv.c,v 1.2 2004-03-11 10:09:11 oleg Exp $
*/
-/* mini iconv and wrapper for system iconv library (if present) */
-
#if HAVE_CONFIG_H
#include <config.h>
#endif
+#include <assert.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <iconv.h>
#endif
-#include <yaz/yaz-util.h>
+#include <yaz/xmalloc.h>
+#include <yaz/nmem.h>
+#include "iconv-p.h"
+
+yaz_conv_func_t yaz_marc8_42_conv;
+yaz_conv_func_t yaz_marc8_45_conv;
+yaz_conv_func_t yaz_marc8_67_conv;
+yaz_conv_func_t yaz_marc8_62_conv;
+yaz_conv_func_t yaz_marc8_70_conv;
+yaz_conv_func_t yaz_marc8_32_conv;
+yaz_conv_func_t yaz_marc8_4E_conv;
+yaz_conv_func_t yaz_marc8_51_conv;
+yaz_conv_func_t yaz_marc8_33_conv;
+yaz_conv_func_t yaz_marc8_34_conv;
+yaz_conv_func_t yaz_marc8_53_conv;
+yaz_conv_func_t yaz_marc8_31_conv;
-unsigned long yaz_marc8_conv (unsigned char *inp, size_t inbytesleft,
- size_t *no_read);
-
struct yaz_iconv_struct {
int my_errno;
int init_flag;
size_t (*init_handle)(yaz_iconv_t cd, unsigned char *inbuf,
- size_t inbytesleft, size_t *no_read);
+ size_t inbytesleft, size_t *no_read);
unsigned long (*read_handle)(yaz_iconv_t cd, unsigned char *inbuf,
size_t inbytesleft, size_t *no_read);
- size_t (*write_handle)(yaz_iconv_t cd, unsigned long x,
- char **outbuf, size_t *outbytesleft);
+ int g0_mode;
+ int g1_mode;
+
+ int comb_offset;
+ int comb_size;
+ unsigned long comb_x[8];
+ size_t comb_no_read[8];
+ size_t no_read_x;
+ unsigned long unget_x;
#if HAVE_ICONV_H
iconv_t iconv_cd;
#endif
+ struct yaz_iconv_encoder_s encoder;
};
-static unsigned long yaz_read_ISO8859_1 (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
+
+static unsigned long yaz_read_ISO8859_1(yaz_iconv_t cd, unsigned char *inp,
+ size_t inbytesleft, size_t *no_read)
{
unsigned long x = inp[0];
*no_read = 1;
return x;
}
-static size_t yaz_init_UTF8 (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
-{
- if (inp[0] != 0xef)
- {
- *no_read = 0;
- return 0;
- }
- if (inbytesleft < 3)
- {
- cd->my_errno = YAZ_ICONV_EINVAL;
- return (size_t) -1;
- }
- if (inp[1] != 0xbb || inp[2] != 0xbf)
- {
- cd->my_errno = YAZ_ICONV_EILSEQ;
- return (size_t) -1;
- }
- *no_read = 3;
- return 0;
-}
-
-static unsigned long yaz_read_UTF8 (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
-{
- unsigned long x = 0;
-
- if (inp[0] <= 0x7f)
- {
- x = inp[0];
- *no_read = 1;
- }
- else if (inp[0] <= 0xbf || inp[0] >= 0xfe)
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EILSEQ;
- }
- else if (inp[0] <= 0xdf && inbytesleft >= 2)
- {
- x = ((inp[0] & 0x1f) << 6) | (inp[1] & 0x3f);
- if (x >= 0x80)
- *no_read = 2;
- else
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EILSEQ;
- }
- }
- else if (inp[0] <= 0xef && inbytesleft >= 3)
- {
- x = ((inp[0] & 0x0f) << 12) | ((inp[1] & 0x3f) << 6) |
- (inp[1] & 0x3f);
- if (x >= 0x800)
- *no_read = 3;
- else
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EILSEQ;
- }
- }
- else if (inp[0] <= 0xf7 && inbytesleft >= 4)
- {
- x = ((inp[0] & 0x07) << 18) | ((inp[1] & 0x3f) << 12) |
- ((inp[2] & 0x3f) << 6) | (inp[3] & 0x3f);
- if (x >= 0x10000)
- *no_read = 4;
- else
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EILSEQ;
- }
- }
- else if (inp[0] <= 0xfb && inbytesleft >= 5)
- {
- x = ((inp[0] & 0x03) << 24) | ((inp[1] & 0x3f) << 18) |
- ((inp[2] & 0x3f) << 12) | ((inp[3] & 0x3f) << 6) |
- (inp[4] & 0x3f);
- if (x >= 0x200000)
- *no_read = 5;
- else
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EILSEQ;
- }
- }
- else if (inp[0] <= 0xfd && inbytesleft >= 6)
- {
- x = ((inp[0] & 0x01) << 30) | ((inp[1] & 0x3f) << 24) |
- ((inp[2] & 0x3f) << 18) | ((inp[3] & 0x3f) << 12) |
- ((inp[4] & 0x3f) << 6) | (inp[5] & 0x3f);
- if (x >= 0x4000000)
- *no_read = 6;
- else
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EILSEQ;
- }
- }
- else
- {
- *no_read = 0;
- cd->my_errno = YAZ_ICONV_EINVAL;
- }
- return x;
-}
-
-static unsigned long yaz_read_UCS4 (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
-{
- unsigned long x = 0;
-
- if (inbytesleft < 4)
- {
- cd->my_errno = YAZ_ICONV_EINVAL; /* incomplete input */
- *no_read = 0;
- }
- else
- {
- x = (inp[0]<<24) | (inp[1]<<16) | (inp[2]<<8) | inp[3];
- *no_read = 4;
- }
- return x;
-}
-
-static unsigned long yaz_read_UCS4LE (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
-{
- unsigned long x = 0;
-
- if (inbytesleft < 4)
- {
- cd->my_errno = YAZ_ICONV_EINVAL; /* incomplete input */
- *no_read = 0;
- }
- else
- {
- x = (inp[3]<<24) | (inp[2]<<16) | (inp[1]<<8) | inp[0];
- *no_read = 4;
- }
- return x;
-}
-
#if HAVE_WCHAR_H
-static unsigned long yaz_read_wchar_t (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
+static unsigned long yaz_read_wchar_t(yaz_iconv_t cd, unsigned char *inp,
+ size_t inbytesleft, size_t *no_read)
{
unsigned long x = 0;
else
{
wchar_t wch;
- memcpy (&wch, inp, sizeof(wch));
+ memcpy(&wch, inp, sizeof(wch));
x = wch;
*no_read = sizeof(wch);
}
}
#endif
-static unsigned long yaz_read_marc8 (yaz_iconv_t cd, unsigned char *inp,
- size_t inbytesleft, size_t *no_read)
-{
- return yaz_marc8_conv(inp, inbytesleft, no_read);
-}
-static size_t yaz_write_UTF8 (yaz_iconv_t cd, unsigned long x,
- char **outbuf, size_t *outbytesleft)
-{
- unsigned char *outp = (unsigned char *) *outbuf;
- if (x <= 0x7f && *outbytesleft >= 1)
- {
- *outp++ = (unsigned char) x;
- (*outbytesleft)--;
- }
- else if (x <= 0x7ff && *outbytesleft >= 2)
- {
- *outp++ = (unsigned char) ((x >> 6) | 0xc0);
- *outp++ = (unsigned char) ((x & 0x3f) | 0x80);
- (*outbytesleft) -= 2;
- }
- else if (x <= 0xffff && *outbytesleft >= 3)
- {
- *outp++ = (unsigned char) ((x >> 12) | 0xe0);
- *outp++ = (unsigned char) (((x >> 6) & 0x3f) | 0x80);
- *outp++ = (unsigned char) ((x & 0x3f) | 0x80);
- (*outbytesleft) -= 3;
- }
- else if (x <= 0x1fffff && *outbytesleft >= 4)
- {
- *outp++ = (unsigned char) ((x >> 18) | 0xf0);
- *outp++ = (unsigned char) (((x >> 12) & 0x3f) | 0x80);
- *outp++ = (unsigned char) (((x >> 6) & 0x3f) | 0x80);
- *outp++ = (unsigned char) ((x & 0x3f) | 0x80);
- (*outbytesleft) -= 4;
- }
- else if (x <= 0x3ffffff && *outbytesleft >= 5)
- {
- *outp++ = (unsigned char) ((x >> 24) | 0xf8);
- *outp++ = (unsigned char) (((x >> 18) & 0x3f) | 0x80);
- *outp++ = (unsigned char) (((x >> 12) & 0x3f) | 0x80);
- *outp++ = (unsigned char) (((x >> 6) & 0x3f) | 0x80);
- *outp++ = (unsigned char) ((x & 0x3f) | 0x80);
- (*outbytesleft) -= 5;
- }
- else if (*outbytesleft >= 6)
- {
- *outp++ = (unsigned char) ((x >> 30) | 0xfc);
- *outp++ = (unsigned char) (((x >> 24) & 0x3f) | 0x80);
- *outp++ = (unsigned char) (((x >> 18) & 0x3f) | 0x80);
- *outp++ = (unsigned char) (((x >> 12) & 0x3f) | 0x80);
- *outp++ = (unsigned char) (((x >> 6) & 0x3f) | 0x80);
- *outp++ = (unsigned char) ((x & 0x3f) | 0x80);
- (*outbytesleft) -= 6;
- }
- else
- {
- cd->my_errno = YAZ_ICONV_E2BIG; /* not room for output */
- return (size_t)(-1);
- }
- *outbuf = (char *) outp;
- return 0;
-}
+static unsigned long yaz_read_marc8_comb(yaz_iconv_t cd, unsigned char *inp,
+ size_t inbytesleft, size_t *no_read,
+ int *comb);
-static size_t yaz_write_ISO8859_1 (yaz_iconv_t cd, unsigned long x,
- char **outbuf, size_t *outbytesleft)
+static unsigned long yaz_read_marc8(yaz_iconv_t cd, unsigned char *inp,
+ size_t inbytesleft, size_t *no_read)
{
- unsigned char *outp = (unsigned char *) *outbuf;
- if (x > 255 || x < 1)
+ unsigned long x;
+ if (cd->comb_offset < cd->comb_size)
{
- cd->my_errno = YAZ_ICONV_EILSEQ;
- return (size_t) -1;
- }
- else if (*outbytesleft >= 1)
- {
- *outp++ = (unsigned char) x;
- (*outbytesleft)--;
+ *no_read = cd->comb_no_read[cd->comb_offset];
+ x = cd->comb_x[cd->comb_offset];
+
+ /* special case for double-diacritic combining characters,
+ INVERTED BREVE and DOUBLE TILDE.
+ We'll increment the no_read counter by 1, since we want to skip over
+ the processing of the closing ligature character
+ */
+ /* this code is no longer necessary.. our handlers code in
+ yaz_marc8_?_conv (generated by charconv.tcl) now returns
+ 0 and no_read=1 when a sequence does not match the input.
+ The SECOND HALFs in codetables.xml produces a non-existant
+ entry in the conversion trie.. Hence when met, the input byte is
+ skipped as it should (in yaz_iconv)
+ */
+#if 0
+ if (x == 0x0361 || x == 0x0360)
+ *no_read += 1;
+#endif
+ cd->comb_offset++;
+ return x;
}
- else
+
+ cd->comb_offset = 0;
+ for (cd->comb_size = 0; cd->comb_size < 8; cd->comb_size++)
{
- cd->my_errno = YAZ_ICONV_E2BIG;
- return (size_t)(-1);
+ int comb = 0;
+
+ if (inbytesleft == 0 && cd->comb_size)
+ {
+ cd->my_errno = YAZ_ICONV_EINVAL;
+ x = 0;
+ *no_read = 0;
+ break;
+ }
+ x = yaz_read_marc8_comb(cd, inp, inbytesleft, no_read, &comb);
+ if (!comb || !x)
+ break;
+ cd->comb_x[cd->comb_size] = x;
+ cd->comb_no_read[cd->comb_size] = *no_read;
+ inp += *no_read;
+ inbytesleft = inbytesleft - *no_read;
}
- *outbuf = (char *) outp;
- return 0;
+ return x;
}
-
-static size_t yaz_write_UCS4 (yaz_iconv_t cd, unsigned long x,
- char **outbuf, size_t *outbytesleft)
+static unsigned long yaz_read_marc8s(yaz_iconv_t cd, unsigned char *inp,
+ size_t inbytesleft, size_t *no_read)
{
- unsigned char *outp = (unsigned char *) *outbuf;
- if (*outbytesleft >= 4)
+ unsigned long x = yaz_read_marc8(cd, inp, inbytesleft, no_read);
+ if (x && cd->comb_size == 1)
{
- *outp++ = (unsigned char) (x>>24);
- *outp++ = (unsigned char) (x>>16);
- *outp++ = (unsigned char) (x>>8);
- *outp++ = (unsigned char) x;
- (*outbytesleft) -= 4;
- }
- else
- {
- cd->my_errno = YAZ_ICONV_E2BIG;
- return (size_t)(-1);
+ if (yaz_iso_8859_1_lookup_x12(x, cd->comb_x[0], &x))
+ {
+ *no_read += cd->comb_no_read[0];
+ cd->comb_size = 0;
+ }
}
- *outbuf = (char *) outp;
- return 0;
+ return x;
}
-static size_t yaz_write_UCS4LE (yaz_iconv_t cd, unsigned long x,
- char **outbuf, size_t *outbytesleft)
+static unsigned long yaz_read_marc8_comb(yaz_iconv_t cd, unsigned char *inp,
+ size_t inbytesleft, size_t *no_read,
+ int *comb)
{
- unsigned char *outp = (unsigned char *) *outbuf;
- if (*outbytesleft >= 4)
+ *no_read = 0;
+ while (inbytesleft > 0 && *inp == 27)
{
- *outp++ = (unsigned char) x;
- *outp++ = (unsigned char) (x>>8);
- *outp++ = (unsigned char) (x>>16);
- *outp++ = (unsigned char) (x>>24);
- (*outbytesleft) -= 4;
- }
- else
- {
- cd->my_errno = YAZ_ICONV_E2BIG;
- return (size_t)(-1);
- }
- *outbuf = (char *) outp;
- return 0;
-}
+ int *modep = &cd->g0_mode;
+ size_t inbytesleft0 = inbytesleft;
-#if HAVE_WCHAR_H
-static size_t yaz_write_wchar_t (yaz_iconv_t cd, unsigned long x,
- char **outbuf, size_t *outbytesleft)
-{
- unsigned char *outp = (unsigned char *) *outbuf;
+ inbytesleft--;
+ inp++;
+ if (inbytesleft == 0)
+ goto incomplete;
+ if (*inp == '$') /* set with multiple bytes */
+ {
+ inbytesleft--;
+ inp++;
+ }
+ if (inbytesleft == 0)
+ goto incomplete;
+ if (*inp == '(' || *inp == ',') /* G0 */
+ {
+ inbytesleft--;
+ inp++;
+ }
+ else if (*inp == ')' || *inp == '-') /* G1 */
+ {
+ inbytesleft--;
+ inp++;
+ modep = &cd->g1_mode;
+ }
+ if (inbytesleft == 0)
+ goto incomplete;
+ if (*inp == '!') /* ANSEL is a special case */
+ {
+ inbytesleft--;
+ inp++;
+ }
+ if (inbytesleft == 0)
+ goto incomplete;
+ *modep = *inp++; /* Final character */
+ inbytesleft--;
- if (*outbytesleft >= sizeof(wchar_t))
+ (*no_read) += inbytesleft0 - inbytesleft;
+ }
+ if (inbytesleft == 0)
+ return 0;
+ else if (*inp == ' ')
{
- wchar_t wch = x;
- memcpy(outp, &wch, sizeof(wch));
- outp += sizeof(wch);
- (*outbytesleft) -= sizeof(wch);
+ *no_read += 1;
+ return ' ';
}
else
{
- cd->my_errno = YAZ_ICONV_E2BIG;
- return (size_t)(-1);
+ unsigned long x;
+ size_t no_read_sub = 0;
+ int mode = *inp < 128 ? cd->g0_mode : cd->g1_mode;
+ *comb = 0;
+
+ switch(mode)
+ {
+ case 'B': /* Basic ASCII */
+ case 's': /* ASCII */
+ x = yaz_marc8_42_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case 'E': /* ANSEL */
+ x = yaz_marc8_45_conv(inp, inbytesleft, &no_read_sub, comb, 127, 128);
+ break;
+ case 'g': /* Greek */
+ x = yaz_marc8_67_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case 'b': /* Subscripts */
+ x = yaz_marc8_62_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case 'p': /* Superscripts */
+ x = yaz_marc8_70_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case '2': /* Basic Hebrew */
+ x = yaz_marc8_32_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case 'N': /* Basic Cyrillic */
+ x = yaz_marc8_4E_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case 'Q': /* Extended Cyrillic */
+ x = yaz_marc8_51_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case '3': /* Basic Arabic */
+ x = yaz_marc8_33_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case '4': /* Extended Arabic */
+ x = yaz_marc8_34_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case 'S': /* Greek */
+ x = yaz_marc8_53_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ case '1': /* Chinese, Japanese, Korean (EACC) */
+ x = yaz_marc8_31_conv(inp, inbytesleft, &no_read_sub, comb, 127, 0);
+ break;
+ default:
+ *no_read = 0;
+ cd->my_errno = YAZ_ICONV_EILSEQ;
+ return 0;
+ }
+ *no_read += no_read_sub;
+ return x;
}
- *outbuf = (char *) outp;
+incomplete:
+ *no_read = 0;
+ cd->my_errno = YAZ_ICONV_EINVAL;
return 0;
}
-#endif
+
+
int yaz_iconv_isbuiltin(yaz_iconv_t cd)
{
- return cd->read_handle && cd->write_handle;
+ return cd->read_handle && cd->encoder.write_handle;
+}
+
+
+static int prepare_encoders(yaz_iconv_t cd, const char *tocode)
+{
+ if (yaz_marc8_encoder(tocode, &cd->encoder))
+ return 1;
+ if (yaz_utf8_encoder(tocode, &cd->encoder))
+ return 1;
+ if (yaz_ucs4_encoder(tocode, &cd->encoder))
+ return 1;
+ if (yaz_iso_8859_1_encoder(tocode, &cd->encoder))
+ return 1;
+ if (yaz_iso_5428_encoder(tocode, &cd->encoder))
+ return 1;
+ if (yaz_advancegreek_encoder(tocode, &cd->encoder))
+ return 1;
+ if (yaz_wchar_encoder(tocode, &cd->encoder))
+ return 1;
+ return 0;
}
-yaz_iconv_t yaz_iconv_open (const char *tocode, const char *fromcode)
+yaz_iconv_t yaz_iconv_open(const char *tocode, const char *fromcode)
{
yaz_iconv_t cd = (yaz_iconv_t) xmalloc (sizeof(*cd));
- cd->write_handle = 0;
+ cd->encoder.data = 0;
+ cd->encoder.write_handle = 0;
+ cd->encoder.flush_handle = 0;
+ cd->encoder.init_handle = 0;
+ cd->encoder.destroy_handle = 0;
+
cd->read_handle = 0;
cd->init_handle = 0;
cd->my_errno = YAZ_ICONV_UNKNOWN;
cd->read_handle = yaz_read_UCS4LE;
else if (!yaz_matchstr(fromcode, "MARC8"))
cd->read_handle = yaz_read_marc8;
+ else if (!yaz_matchstr(fromcode, "MARC8s"))
+ cd->read_handle = yaz_read_marc8s;
+ else if (!yaz_matchstr(fromcode, "advancegreek"))
+ cd->read_handle = yaz_read_advancegreek;
+ else if (!yaz_matchstr(fromcode, "iso54281984"))
+ cd->read_handle = yaz_read_iso5428_1984;
+ else if (!yaz_matchstr(fromcode, "iso5428:1984"))
+ cd->read_handle = yaz_read_iso5428_1984;
#if HAVE_WCHAR_H
else if (!yaz_matchstr(fromcode, "WCHAR_T"))
cd->read_handle = yaz_read_wchar_t;
#endif
-
- if (!yaz_matchstr(tocode, "UTF8"))
- cd->write_handle = yaz_write_UTF8;
- else if (!yaz_matchstr(tocode, "ISO88591"))
- cd->write_handle = yaz_write_ISO8859_1;
- else if (!yaz_matchstr (tocode, "UCS4"))
- cd->write_handle = yaz_write_UCS4;
- else if (!yaz_matchstr(tocode, "UCS4LE"))
- cd->write_handle = yaz_write_UCS4LE;
-#if HAVE_WCHAR_H
- else if (!yaz_matchstr(tocode, "WCHAR_T"))
- cd->write_handle = yaz_write_wchar_t;
-#endif
+ prepare_encoders(cd, tocode);
}
+ if (cd->read_handle && cd->encoder.write_handle)
+ {
#if HAVE_ICONV_H
- cd->iconv_cd = 0;
- if (!cd->read_handle || !cd->write_handle)
+ cd->iconv_cd = 0;
+#endif
+ ;
+ }
+ else
{
- cd->iconv_cd = iconv_open (tocode, fromcode);
+#if HAVE_ICONV_H
+ cd->iconv_cd = iconv_open(tocode, fromcode);
if (cd->iconv_cd == (iconv_t) (-1))
{
- xfree (cd);
+ yaz_iconv_close(cd);
return 0;
}
- }
#else
- if (!cd->read_handle || !cd->write_handle)
- {
- xfree (cd);
+ yaz_iconv_close(cd);
return 0;
- }
#endif
+ }
cd->init_flag = 1;
return cd;
}
-size_t yaz_iconv (yaz_iconv_t cd, char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
+size_t yaz_iconv(yaz_iconv_t cd, char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
{
- char *inbuf0;
+ char *inbuf0 = 0;
size_t r = 0;
+
#if HAVE_ICONV_H
if (cd->iconv_cd)
{
return r;
}
#endif
- if (inbuf == 0 || *inbuf == 0)
- {
- cd->init_flag = 1;
- cd->my_errno = YAZ_ICONV_UNKNOWN;
- return 0;
- }
- inbuf0 = *inbuf;
+
+ if (inbuf)
+ inbuf0 = *inbuf;
if (cd->init_flag)
{
- if (cd->init_handle)
+ cd->my_errno = YAZ_ICONV_UNKNOWN;
+ cd->g0_mode = 'B';
+ cd->g1_mode = 'E';
+
+ cd->comb_offset = cd->comb_size = 0;
+
+ if (cd->encoder.init_handle)
+ (*cd->encoder.init_handle)(&cd->encoder);
+
+ cd->unget_x = 0;
+ cd->no_read_x = 0;
+
+ if (cd->init_handle && inbuf && *inbuf)
{
- size_t no_read;
+ size_t no_read = 0;
size_t r = (cd->init_handle)(cd, (unsigned char *) *inbuf,
*inbytesleft, &no_read);
if (r)
*inbytesleft -= no_read;
*inbuf += no_read;
}
- cd->init_flag = 0;
+ }
+ cd->init_flag = 0;
+
+ if (!inbuf || !*inbuf)
+ {
+ if (outbuf && *outbuf)
+ {
+ if (cd->unget_x)
+ r = (*cd->encoder.write_handle)(cd, &cd->encoder,
+ cd->unget_x, outbuf, outbytesleft);
+ if (cd->encoder.flush_handle)
+ r = (*cd->encoder.flush_handle)(cd, &cd->encoder,
+ outbuf, outbytesleft);
+ }
+ if (r == 0)
+ cd->init_flag = 1;
+ cd->unget_x = 0;
+ return r;
}
while (1)
{
unsigned long x;
size_t no_read;
- if (*inbytesleft == 0)
+ if (cd->unget_x)
{
- r = *inbuf - inbuf0;
- break;
+ x = cd->unget_x;
+ no_read = cd->no_read_x;
}
-
- x = (cd->read_handle)(cd, (unsigned char *) *inbuf, *inbytesleft,
- &no_read);
- if (no_read == 0)
+ else
{
- r = (size_t)(-1);
- break;
+ if (*inbytesleft == 0)
+ {
+ r = *inbuf - inbuf0;
+ break;
+ }
+ x = (*cd->read_handle)(cd, (unsigned char *) *inbuf, *inbytesleft,
+ &no_read);
+ if (no_read == 0)
+ {
+ r = (size_t)(-1);
+ break;
+ }
+ }
+ if (x)
+ {
+ r = (*cd->encoder.write_handle)(cd, &cd->encoder,
+ x, outbuf, outbytesleft);
+ if (r)
+ {
+ /* unable to write it. save it because read_handle cannot
+ rewind .. */
+ if (cd->my_errno == YAZ_ICONV_E2BIG)
+ {
+ cd->unget_x = x;
+ cd->no_read_x = no_read;
+ break;
+ }
+ }
+ cd->unget_x = 0;
}
- r = (cd->write_handle)(cd, x, outbuf, outbytesleft);
- if (r)
- break;
*inbytesleft -= no_read;
(*inbuf) += no_read;
}
return r;
}
-int yaz_iconv_error (yaz_iconv_t cd)
+int yaz_iconv_error(yaz_iconv_t cd)
{
return cd->my_errno;
}
-int yaz_iconv_close (yaz_iconv_t cd)
+int yaz_iconv_close(yaz_iconv_t cd)
{
#if HAVE_ICONV_H
if (cd->iconv_cd)
- iconv_close (cd->iconv_cd);
+ iconv_close(cd->iconv_cd);
#endif
- xfree (cd);
+ if (cd->encoder.destroy_handle)
+ (*cd->encoder.destroy_handle)(&cd->encoder);
+ xfree(cd);
return 0;
}
-
+void yaz_iconv_set_errno(yaz_iconv_t cd, int no)
+{
+ cd->my_errno = no;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
projects / yaz-moved-to-github.git / blobdiff