--- /dev/null
+/*
+ * Copyright (C) 1995-2008, Index Data ApS
+ * See the file LICENSE for details.
+ *
+ */
+/**
+ * \file
+ * \brief ISO-8859-1 encoding / decoding
+ *
+ */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+
+#if HAVE_ICONV_H
+#include <iconv.h>
+#endif
+
+#include <yaz/xmalloc.h>
+#include <yaz/nmem.h>
+#include "iconv-p.h"
+
+struct encoder_data
+{
+ unsigned long compose_char;
+};
+
+
+
+static struct {
+ unsigned long x1, x2;
+ unsigned y;
+} latin1_comb[] = {
+ { 'A', 0x0300, 0xc0}, /* LATIN CAPITAL LETTER A WITH GRAVE */
+ { 'A', 0x0301, 0xc1}, /* LATIN CAPITAL LETTER A WITH ACUTE */
+ { 'A', 0x0302, 0xc2}, /* LATIN CAPITAL LETTER A WITH CIRCUMFLEX */
+ { 'A', 0x0303, 0xc3}, /* LATIN CAPITAL LETTER A WITH TILDE */
+ { 'A', 0x0308, 0xc4}, /* LATIN CAPITAL LETTER A WITH DIAERESIS */
+ { 'A', 0x030a, 0xc5}, /* LATIN CAPITAL LETTER A WITH RING ABOVE */
+ /* no need for 0xc6 LATIN CAPITAL LETTER AE */
+ { 'C', 0x0327, 0xc7}, /* LATIN CAPITAL LETTER C WITH CEDILLA */
+ { 'E', 0x0300, 0xc8}, /* LATIN CAPITAL LETTER E WITH GRAVE */
+ { 'E', 0x0301, 0xc9}, /* LATIN CAPITAL LETTER E WITH ACUTE */
+ { 'E', 0x0302, 0xca}, /* LATIN CAPITAL LETTER E WITH CIRCUMFLEX */
+ { 'E', 0x0308, 0xcb}, /* LATIN CAPITAL LETTER E WITH DIAERESIS */
+ { 'I', 0x0300, 0xcc}, /* LATIN CAPITAL LETTER I WITH GRAVE */
+ { 'I', 0x0301, 0xcd}, /* LATIN CAPITAL LETTER I WITH ACUTE */
+ { 'I', 0x0302, 0xce}, /* LATIN CAPITAL LETTER I WITH CIRCUMFLEX */
+ { 'I', 0x0308, 0xcf}, /* LATIN CAPITAL LETTER I WITH DIAERESIS */
+ { 'N', 0x0303, 0xd1}, /* LATIN CAPITAL LETTER N WITH TILDE */
+ { 'O', 0x0300, 0xd2}, /* LATIN CAPITAL LETTER O WITH GRAVE */
+ { 'O', 0x0301, 0xd3}, /* LATIN CAPITAL LETTER O WITH ACUTE */
+ { 'O', 0x0302, 0xd4}, /* LATIN CAPITAL LETTER O WITH CIRCUMFLEX */
+ { 'O', 0x0303, 0xd5}, /* LATIN CAPITAL LETTER O WITH TILDE */
+ { 'O', 0x0308, 0xd6}, /* LATIN CAPITAL LETTER O WITH DIAERESIS */
+ /* omitted: 0xd7 MULTIPLICATION SIGN */
+ /* omitted: 0xd8 LATIN CAPITAL LETTER O WITH STROKE */
+ { 'U', 0x0300, 0xd9}, /* LATIN CAPITAL LETTER U WITH GRAVE */
+ { 'U', 0x0301, 0xda}, /* LATIN CAPITAL LETTER U WITH ACUTE */
+ { 'U', 0x0302, 0xdb}, /* LATIN CAPITAL LETTER U WITH CIRCUMFLEX */
+ { 'U', 0x0308, 0xdc}, /* LATIN CAPITAL LETTER U WITH DIAERESIS */
+ { 'Y', 0x0301, 0xdd}, /* LATIN CAPITAL LETTER Y WITH ACUTE */
+ /* omitted: 0xde LATIN CAPITAL LETTER THORN */
+ /* omitted: 0xdf LATIN SMALL LETTER SHARP S */
+ { 'a', 0x0300, 0xe0}, /* LATIN SMALL LETTER A WITH GRAVE */
+ { 'a', 0x0301, 0xe1}, /* LATIN SMALL LETTER A WITH ACUTE */
+ { 'a', 0x0302, 0xe2}, /* LATIN SMALL LETTER A WITH CIRCUMFLEX */
+ { 'a', 0x0303, 0xe3}, /* LATIN SMALL LETTER A WITH TILDE */
+ { 'a', 0x0308, 0xe4}, /* LATIN SMALL LETTER A WITH DIAERESIS */
+ { 'a', 0x030a, 0xe5}, /* LATIN SMALL LETTER A WITH RING ABOVE */
+ /* omitted: 0xe6 LATIN SMALL LETTER AE */
+ { 'c', 0x0327, 0xe7}, /* LATIN SMALL LETTER C WITH CEDILLA */
+ { 'e', 0x0300, 0xe8}, /* LATIN SMALL LETTER E WITH GRAVE */
+ { 'e', 0x0301, 0xe9}, /* LATIN SMALL LETTER E WITH ACUTE */
+ { 'e', 0x0302, 0xea}, /* LATIN SMALL LETTER E WITH CIRCUMFLEX */
+ { 'e', 0x0308, 0xeb}, /* LATIN SMALL LETTER E WITH DIAERESIS */
+ { 'i', 0x0300, 0xec}, /* LATIN SMALL LETTER I WITH GRAVE */
+ { 'i', 0x0301, 0xed}, /* LATIN SMALL LETTER I WITH ACUTE */
+ { 'i', 0x0302, 0xee}, /* LATIN SMALL LETTER I WITH CIRCUMFLEX */
+ { 'i', 0x0308, 0xef}, /* LATIN SMALL LETTER I WITH DIAERESIS */
+ /* omitted: 0xf0 LATIN SMALL LETTER ETH */
+ { 'n', 0x0303, 0xf1}, /* LATIN SMALL LETTER N WITH TILDE */
+ { 'o', 0x0300, 0xf2}, /* LATIN SMALL LETTER O WITH GRAVE */
+ { 'o', 0x0301, 0xf3}, /* LATIN SMALL LETTER O WITH ACUTE */
+ { 'o', 0x0302, 0xf4}, /* LATIN SMALL LETTER O WITH CIRCUMFLEX */
+ { 'o', 0x0303, 0xf5}, /* LATIN SMALL LETTER O WITH TILDE */
+ { 'o', 0x0308, 0xf6}, /* LATIN SMALL LETTER O WITH DIAERESIS */
+ /* omitted: 0xf7 DIVISION SIGN */
+ /* omitted: 0xf8 LATIN SMALL LETTER O WITH STROKE */
+ { 'u', 0x0300, 0xf9}, /* LATIN SMALL LETTER U WITH GRAVE */
+ { 'u', 0x0301, 0xfa}, /* LATIN SMALL LETTER U WITH ACUTE */
+ { 'u', 0x0302, 0xfb}, /* LATIN SMALL LETTER U WITH CIRCUMFLEX */
+ { 'u', 0x0308, 0xfc}, /* LATIN SMALL LETTER U WITH DIAERESIS */
+ { 'y', 0x0301, 0xfd}, /* LATIN SMALL LETTER Y WITH ACUTE */
+ /* omitted: 0xfe LATIN SMALL LETTER THORN */
+ { 'y', 0x0308, 0xff}, /* LATIN SMALL LETTER Y WITH DIAERESIS */
+
+ { 0, 0, 0}
+};
+
+int yaz_iso_8859_1_lookup_y(unsigned long v,
+ unsigned long *x1, unsigned long *x2)
+{
+ if (v >= 0xc0 && v <= 0xff) /* optimization. min and max .y values */
+ {
+ int i;
+ for (i = 0; latin1_comb[i].x1; i++)
+ {
+ if (v == latin1_comb[i].y)
+ {
+ *x1 = latin1_comb[i].x1;
+ *x2 = latin1_comb[i].x2;
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+int yaz_iso_8859_1_lookup_x12(unsigned long x1, unsigned long x2,
+ unsigned long *y)
+{
+ /* For MARC8s we try to get a Latin-1 page code out of it */
+ int i;
+ for (i = 0; latin1_comb[i].x1; i++)
+ if (x2 == latin1_comb[i].x2 && x1 == latin1_comb[i].x1)
+ {
+ *y = latin1_comb[i].y;
+ return 1;
+ }
+ return 0;
+}
+
+static size_t write_iso_8859_1(yaz_iconv_t cd, yaz_iconv_encoder_t e,
+ unsigned long x,
+ char **outbuf, size_t *outbytesleft)
+{
+ struct encoder_data *w = e->data;
+ /* list of two char unicode sequence that, when combined, are
+ equivalent to single unicode chars that can be represented in
+ ISO-8859-1/Latin-1.
+ Regular iconv on Linux at least does not seem to convert these,
+ but since MARC-8 to UTF-8 generates these composed sequence
+ we get a better chance of a successful MARC-8 -> ISO-8859-1
+ conversion */
+ unsigned char *outp = (unsigned char *) *outbuf;
+
+ if (w->compose_char)
+ {
+ int i;
+ for (i = 0; latin1_comb[i].x1; i++)
+ if (w->compose_char == latin1_comb[i].x1 && x == latin1_comb[i].x2)
+ {
+ x = latin1_comb[i].y;
+ break;
+ }
+ if (*outbytesleft < 1)
+ { /* no room. Retain compose_char and bail out */
+ yaz_iconv_set_errno(cd, YAZ_ICONV_E2BIG);
+ return (size_t)(-1);
+ }
+ if (!latin1_comb[i].x1)
+ { /* not found. Just write compose_char */
+ *outp++ = (unsigned char) w->compose_char;
+ (*outbytesleft)--;
+ *outbuf = (char *) outp;
+ }
+ /* compose_char used so reset it. x now holds current char */
+ w->compose_char = 0;
+ }
+
+ if (x > 32 && x < 127 && w->compose_char == 0)
+ {
+ w->compose_char = x;
+ return 0;
+ }
+ else if (x > 255 || x < 1)
+ {
+ yaz_iconv_set_errno(cd, YAZ_ICONV_EILSEQ);
+ return (size_t) -1;
+ }
+ else if (*outbytesleft < 1)
+ {
+ yaz_iconv_set_errno(cd, YAZ_ICONV_E2BIG);
+ return (size_t)(-1);
+ }
+ *outp++ = (unsigned char) x;
+ (*outbytesleft)--;
+ *outbuf = (char *) outp;
+ return 0;
+}
+
+static size_t flush_iso_8859_1(yaz_iconv_t cd, yaz_iconv_encoder_t e,
+ char **outbuf, size_t *outbytesleft)
+{
+ struct encoder_data *w = e->data;
+ if (w->compose_char)
+ {
+ unsigned char *outp = (unsigned char *) *outbuf;
+ if (*outbytesleft < 1)
+ {
+ yaz_iconv_set_errno(cd, YAZ_ICONV_E2BIG);
+ return (size_t)(-1);
+ }
+ *outp++ = (unsigned char) w->compose_char;
+ (*outbytesleft)--;
+ *outbuf = (char *) outp;
+ w->compose_char = 0;
+ }
+ return 0;
+}
+
+
+void init_iso_8859_1(yaz_iconv_encoder_t e)
+{
+ struct encoder_data *w = e->data;
+ w->compose_char = 0;
+}
+
+void destroy_iso_8859_1(yaz_iconv_encoder_t e)
+{
+ xfree(e->data);
+}
+
+yaz_iconv_encoder_t yaz_iso_8859_1_encoder(const char *tocode,
+ yaz_iconv_encoder_t e)
+
+{
+ if (!yaz_matchstr(tocode, "iso88591"))
+ {
+ struct encoder_data *data = xmalloc(sizeof(*data));
+ e->data = data;
+ e->write_handle = write_iso_8859_1;
+ e->flush_handle = flush_iso_8859_1;
+ e->init_handle = init_iso_8859_1;
+ e->destroy_handle = destroy_iso_8859_1;
+ return e;
+ }
+ return 0;
+}
+
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
projects / yaz-moved-to-github.git / blobdiff