vendor/heimdal/1.5

1 files changed, 516 insertions, 0 deletions

diff --git a/lib/wind/utf8.c b/lib/wind/utf8.c
new file mode 100644
index 000000000000..6907b3c9d3ab
--- /dev/null
+++ b/lib/wind/utf8.c
@@ -0,0 +1,516 @@
+/*
+ * Copyright (c) 2004, 2006, 2007, 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include "windlocl.h"
+
+static int
+utf8toutf32(const unsigned char **pp, uint32_t *out)
+{
+    const unsigned char *p = *pp;
+    unsigned c = *p;
+
+    if (c & 0x80) {
+	if ((c & 0xE0) == 0xC0) {
+	    const unsigned c2 = *++p;
+	    if ((c2 & 0xC0) == 0x80) {
+		*out =  ((c  & 0x1F) << 6)
+		    | (c2 & 0x3F);
+	    } else {
+		return WIND_ERR_INVALID_UTF8;
+	    }
+	} else if ((c & 0xF0) == 0xE0) {
+	    const unsigned c2 = *++p;
+	    if ((c2 & 0xC0) == 0x80) {
+		const unsigned c3 = *++p;
+		if ((c3 & 0xC0) == 0x80) {
+		    *out =   ((c  & 0x0F) << 12)
+			| ((c2 & 0x3F) << 6)
+			|  (c3 & 0x3F);
+		} else {
+		    return WIND_ERR_INVALID_UTF8;
+		}
+	    } else {
+		return WIND_ERR_INVALID_UTF8;
+	    }
+	} else if ((c & 0xF8) == 0xF0) {
+	    const unsigned c2 = *++p;
+	    if ((c2 & 0xC0) == 0x80) {
+		const unsigned c3 = *++p;
+		if ((c3 & 0xC0) == 0x80) {
+		    const unsigned c4 = *++p;
+		    if ((c4 & 0xC0) == 0x80) {
+			*out =   ((c  & 0x07) << 18)
+			    | ((c2 & 0x3F) << 12)
+			    | ((c3 & 0x3F) <<  6)
+			    |  (c4 & 0x3F);
+		    } else {
+			return WIND_ERR_INVALID_UTF8;
+		    }
+		} else {
+		    return WIND_ERR_INVALID_UTF8;
+		}
+	    } else {
+		return WIND_ERR_INVALID_UTF8;
+	    }
+	} else {
+	    return WIND_ERR_INVALID_UTF8;
+	}
+    } else {
+	*out = c;
+    }
+
+    *pp = p;
+
+    return 0;
+}
+
+/**
+ * Convert an UTF-8 string to an UCS4 string.
+ *
+ * @param in an UTF-8 string to convert.
+ * @param out the resulting UCS4 strint, must be at least
+ * wind_utf8ucs4_length() long.  If out is NULL, the function will
+ * calculate the needed space for the out variable (just like
+ * wind_utf8ucs4_length()).
+ * @param out_len before processing out_len should be the length of
+ * the out variable, after processing it will be the length of the out
+ * string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_utf8ucs4(const char *in, uint32_t *out, size_t *out_len)
+{
+    const unsigned char *p;
+    size_t o = 0;
+    int ret;
+
+    for (p = (const unsigned char *)in; *p != '\0'; ++p) {
+	uint32_t u;
+
+	ret = utf8toutf32(&p, &u);
+	if (ret)
+	    return ret;
+
+	if (out) {
+	    if (o >= *out_len)
+		return WIND_ERR_OVERRUN;
+	    out[o] = u;
+	}
+	o++;
+    }
+    *out_len = o;
+    return 0;
+}
+
+/**
+ * Calculate the length of from converting a UTF-8 string to a UCS4
+ * string.
+ *
+ * @param in an UTF-8 string to convert.
+ * @param out_len the length of the resulting UCS4 string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_utf8ucs4_length(const char *in, size_t *out_len)
+{
+    return wind_utf8ucs4(in, NULL, out_len);
+}
+
+static const char first_char[4] =
+    { 0x00, 0xC0, 0xE0, 0xF0 };
+
+/**
+ * Convert an UCS4 string to a UTF-8 string.
+ *
+ * @param in an UCS4 string to convert.
+ * @param in_len the length input array.
+
+ * @param out the resulting UTF-8 strint, must be at least
+ * wind_ucs4utf8_length() + 1 long (the extra char for the NUL).  If
+ * out is NULL, the function will calculate the needed space for the
+ * out variable (just like wind_ucs4utf8_length()).
+
+ * @param out_len before processing out_len should be the length of
+ * the out variable, after processing it will be the length of the out
+ * string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_ucs4utf8(const uint32_t *in, size_t in_len, char *out, size_t *out_len)
+{
+    uint32_t ch;
+    size_t i, len, o;
+
+    for (o = 0, i = 0; i < in_len; i++) {
+	ch = in[i];
+
+	if (ch < 0x80) {
+	    len = 1;
+	} else if (ch < 0x800) {
+	    len = 2;
+	} else if (ch < 0x10000) {
+	    len = 3;
+	} else if (ch <= 0x10FFFF) {
+	    len = 4;
+	} else
+	    return WIND_ERR_INVALID_UTF32;
+
+	o += len;
+
+	if (out) {
+	    if (o >= *out_len)
+		return WIND_ERR_OVERRUN;
+
+	    switch(len) {
+	    case 4:
+		out[3] = (ch | 0x80) & 0xbf;
+		ch = ch << 6;
+	    case 3:
+		out[2] = (ch | 0x80) & 0xbf;
+		ch = ch << 6;
+	    case 2:
+		out[1] = (ch | 0x80) & 0xbf;
+		ch = ch << 6;
+	    case 1:
+		out[0] = ch | first_char[len - 1];
+	    }
+	}
+	out += len;
+    }
+    if (out) {
+	if (o + 1 >= *out_len)
+	    return WIND_ERR_OVERRUN;
+	*out = '\0';
+    }
+    *out_len = o;
+    return 0;
+}
+
+/**
+ * Calculate the length of from converting a UCS4 string to an UTF-8 string.
+ *
+ * @param in an UCS4 string to convert.
+ * @param in_len the length of UCS4 string to convert.
+ * @param out_len the length of the resulting UTF-8 string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_ucs4utf8_length(const uint32_t *in, size_t in_len, size_t *out_len)
+{
+    return wind_ucs4utf8(in, in_len, NULL, out_len);
+}
+
+/**
+ * Read in an UCS2 from a buffer.
+ *
+ * @param ptr The input buffer to read from.
+ * @param len the length of the input buffer.
+ * @param flags Flags to control the behavior of the function.
+ * @param out the output UCS2, the array must be at least out/2 long.
+ * @param out_len the output length
+ *
+ * @return returns 0 on success, an wind error code otherwise.
+ * @ingroup wind
+ */
+
+int
+wind_ucs2read(const void *ptr, size_t len, unsigned int *flags,
+	      uint16_t *out, size_t *out_len)
+{
+    const unsigned char *p = ptr;
+    int little = ((*flags) & WIND_RW_LE);
+    size_t olen = *out_len;
+
+    /** if len is zero, flags are unchanged */
+    if (len == 0) {
+	*out_len = 0;
+	return 0;
+    }
+
+    /** if len is odd, WIND_ERR_LENGTH_NOT_MOD2 is returned */
+    if (len & 1)
+	return WIND_ERR_LENGTH_NOT_MOD2;
+
+    /**
+     * If the flags WIND_RW_BOM is set, check for BOM. If not BOM is
+     * found, check is LE/BE flag is already and use that otherwise
+     * fail with WIND_ERR_NO_BOM. When done, clear WIND_RW_BOM and
+     * the LE/BE flag and set the resulting LE/BE flag.
+     */
+    if ((*flags) & WIND_RW_BOM) {
+	uint16_t bom = (p[0] << 8) + p[1];
+	if (bom == 0xfffe || bom == 0xfeff) {
+	    little = (bom == 0xfffe);
+	    p += 2;
+	    len -= 2;
+	} else if (((*flags) & (WIND_RW_LE|WIND_RW_BE)) != 0) {
+	    /* little already set */
+	} else
+	    return WIND_ERR_NO_BOM;
+	*flags = ((*flags) & ~(WIND_RW_BOM|WIND_RW_LE|WIND_RW_BE));
+	*flags |= little ? WIND_RW_LE : WIND_RW_BE;
+    }
+
+    while (len) {
+	if (olen < 1)
+	    return WIND_ERR_OVERRUN;
+	if (little)
+	    *out = (p[1] << 8) + p[0];
+	else
+	    *out = (p[0] << 8) + p[1];
+	out++; p += 2; len -= 2; olen--;
+    }
+    *out_len -= olen;
+    return 0;
+}
+
+/**
+ * Write an UCS2 string to a buffer.
+ *
+ * @param in The input UCS2 string.
+ * @param in_len the length of the input buffer.
+ * @param flags Flags to control the behavior of the function.
+ * @param ptr The input buffer to write to, the array must be at least
+ * (in + 1) * 2 bytes long.
+ * @param out_len the output length
+ *
+ * @return returns 0 on success, an wind error code otherwise.
+ * @ingroup wind
+ */
+
+int
+wind_ucs2write(const uint16_t *in, size_t in_len, unsigned int *flags,
+	       void *ptr, size_t *out_len)
+{
+    unsigned char *p = ptr;
+    size_t len = *out_len;
+
+    /** If in buffer is not of length be mod 2, WIND_ERR_LENGTH_NOT_MOD2 is returned*/
+    if (len & 1)
+	return WIND_ERR_LENGTH_NOT_MOD2;
+
+    /** On zero input length, flags are preserved */
+    if (in_len == 0) {
+	*out_len = 0;
+	return 0;
+    }
+    /** If flags have WIND_RW_BOM set, the byte order mark is written
+     * first to the output data */
+    if ((*flags) & WIND_RW_BOM) {
+	uint16_t bom = 0xfffe;
+
+	if (len < 2)
+	    return WIND_ERR_OVERRUN;
+
+	if ((*flags) & WIND_RW_LE) {
+	    p[0] = (bom >> 8) & 0xff;
+	    p[1] = (bom     ) & 0xff;
+	} else {
+	    p[1] = (bom     ) & 0xff;
+	    p[0] = (bom >> 8) & 0xff;
+	}
+	len -= 2;
+    }
+
+    while (in_len) {
+	/** If the output wont fit into out_len, WIND_ERR_OVERRUN is returned */
+	if (len < 2)
+	    return WIND_ERR_OVERRUN;
+	if ((*flags) & WIND_RW_LE) {
+	    p[0] = (in[0] >> 8) & 0xff;
+	    p[1] = (in[0]     ) & 0xff;
+	} else {
+	    p[1] = (in[0]     ) & 0xff;
+	    p[0] = (in[0] >> 8) & 0xff;
+	}
+	len -= 2;
+	in_len--;
+	p += 2;
+	in++;
+    }
+    *out_len -= len;
+    return 0;
+}
+
+
+/**
+ * Convert an UTF-8 string to an UCS2 string.
+ *
+ * @param in an UTF-8 string to convert.
+ * @param out the resulting UCS2 strint, must be at least
+ * wind_utf8ucs2_length() long.  If out is NULL, the function will
+ * calculate the needed space for the out variable (just like
+ * wind_utf8ucs2_length()).
+ * @param out_len before processing out_len should be the length of
+ * the out variable, after processing it will be the length of the out
+ * string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_utf8ucs2(const char *in, uint16_t *out, size_t *out_len)
+{
+    const unsigned char *p;
+    size_t o = 0;
+    int ret;
+
+    for (p = (const unsigned char *)in; *p != '\0'; ++p) {
+	uint32_t u;
+
+	ret = utf8toutf32(&p, &u);
+	if (ret)
+	    return ret;
+
+	if (u & 0xffff0000)
+	    return WIND_ERR_NOT_UTF16;
+
+	if (out) {
+	    if (o >= *out_len)
+		return WIND_ERR_OVERRUN;
+	    out[o] = u;
+	}
+	o++;
+    }
+    *out_len = o;
+    return 0;
+}
+
+/**
+ * Calculate the length of from converting a UTF-8 string to a UCS2
+ * string.
+ *
+ * @param in an UTF-8 string to convert.
+ * @param out_len the length of the resulting UCS4 string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_utf8ucs2_length(const char *in, size_t *out_len)
+{
+    return wind_utf8ucs2(in, NULL, out_len);
+}
+
+/**
+ * Convert an UCS2 string to a UTF-8 string.
+ *
+ * @param in an UCS2 string to convert.
+ * @param in_len the length of the in UCS2 string.
+ * @param out the resulting UTF-8 strint, must be at least
+ * wind_ucs2utf8_length() long.  If out is NULL, the function will
+ * calculate the needed space for the out variable (just like
+ * wind_ucs2utf8_length()).
+ * @param out_len before processing out_len should be the length of
+ * the out variable, after processing it will be the length of the out
+ * string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_ucs2utf8(const uint16_t *in, size_t in_len, char *out, size_t *out_len)
+{
+    uint16_t ch;
+    size_t i, len, o;
+
+    for (o = 0, i = 0; i < in_len; i++) {
+	ch = in[i];
+
+	if (ch < 0x80) {
+	    len = 1;
+	} else if (ch < 0x800) {
+	    len = 2;
+	} else
+	    len = 3;
+
+	o += len;
+
+	if (out) {
+	    if (o >= *out_len)
+		return WIND_ERR_OVERRUN;
+
+	    switch(len) {
+	    case 3:
+		out[2] = (ch | 0x80) & 0xbf;
+		ch = ch << 6;
+	    case 2:
+		out[1] = (ch | 0x80) & 0xbf;
+		ch = ch << 6;
+	    case 1:
+		out[0] = ch | first_char[len - 1];
+	    }
+	    out += len;
+	}
+    }
+    if (out) {
+	if (o >= *out_len)
+	    return WIND_ERR_OVERRUN;
+	*out = '\0';
+    }
+    *out_len = o;
+    return 0;
+}
+
+/**
+ * Calculate the length of from converting a UCS2 string to an UTF-8 string.
+ *
+ * @param in an UCS2 string to convert.
+ * @param in_len an UCS2 string length to convert.
+ * @param out_len the length of the resulting UTF-8 string.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_ucs2utf8_length(const uint16_t *in, size_t in_len, size_t *out_len)
+{
+    return wind_ucs2utf8(in, in_len, NULL, out_len);
+}