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#!/usr/bin/env python
#
# Copyright (c) 2006 Christoph Pfisterer
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * 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.
#
# * Neither the name of Christoph Pfisterer nor the names of the
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
# OWNER 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.
#
#
# mk_fsw_strfunc.py
#
# definitions
types = {
'ISO88591': 'fsw_u8',
'UTF8': 'fsw_u8',
'UTF16': 'fsw_u16',
'UTF16_SWAPPED': 'fsw_u16',
}
getnext = {
'ISO88591': 'VARC = *VARP++;',
'UTF8': """VARC = *VARP++;
if ((VARC & 0xe0) == 0xc0) {
VARC = ((VARC & 0x1f) << 6) | (*VARP++ & 0x3f);
} else if ((VARC & 0xf0) == 0xe0) {
VARC = ((VARC & 0x0f) << 12) | ((*VARP++ & 0x3f) << 6);
VARC |= (*VARP++ & 0x3f);
} else if ((VARC & 0xf8) == 0xf0) {
VARC = ((VARC & 0x07) << 18) | ((*VARP++ & 0x3f) << 12);
VARC |= ((*VARP++ & 0x3f) << 6);
VARC |= (*VARP++ & 0x3f);
}""",
'UTF16': 'VARC = *VARP++;',
'UTF16_SWAPPED': 'VARC = *VARP++; VARC = FSW_SWAPVALUE_U16(VARC);',
}
combos = ( ('ISO88591', 'UTF8'), ('ISO88591', 'UTF16'), ('ISO88591', 'UTF16_SWAPPED'),
('UTF8', 'UTF16'), ('UTF8', 'UTF16_SWAPPED'),
('UTF16', 'UTF16_SWAPPED') )
coerce_combos = {}
for combo in combos:
coerce_combos.setdefault(combo[0], []).append(combo[1])
coerce_combos.setdefault(combo[1], []).append(combo[0])
# generate functions
output = """/* fsw_strfunc.h generated by mk_fsw_strfunc.py */
"""
# generate streq functions (symmetric)
for combo in combos:
(enc1, enc2) = combo
type1 = types[enc1]
type2 = types[enc2]
getnext1 = getnext[enc1].replace('VARC', 'c1').replace('VARP', 'p1').replace("\n", "\n ")
getnext2 = getnext[enc2].replace('VARC', 'c2').replace('VARP', 'p2').replace("\n", "\n ")
output += """
static int fsw_streq_%(enc1)s_%(enc2)s(void *s1data, void *s2data, int len)
{
int i;
%(type1)s *p1 = (%(type1)s *)s1data;
%(type2)s *p2 = (%(type2)s *)s2data;
fsw_u32 c1, c2;
for (i = 0; i < len; i++) {
%(getnext1)s
%(getnext2)s
if (c1 != c2)
return 0;
}
return 1;
}
""" % locals()
# generate strcoerce functions (asymmetric, destination-specific)
for enc2 in ('ISO88591', 'UTF16'):
for enc1 in coerce_combos[enc2]:
type1 = types[enc1]
type2 = types[enc2]
getnext1 = getnext[enc1].replace('VARC', 'c').replace('VARP', 'sp').replace("\n", "\n ")
output += """
static fsw_status_t fsw_strcoerce_%(enc1)s_%(enc2)s(void *srcdata, int srclen, struct fsw_string *dest)
{
fsw_status_t status;
int i;
%(type1)s *sp;
%(type2)s *dp;
fsw_u32 c;
dest->type = FSW_STRING_TYPE_%(enc2)s;
dest->len = srclen;
dest->size = srclen * sizeof(%(type2)s);
status = fsw_alloc(dest->size, &dest->data);
if (status)
return status;
sp = (%(type1)s *)srcdata;
dp = (%(type2)s *)dest->data;
for (i = 0; i < srclen; i++) {
%(getnext1)s
*dp++ = c;
}
return FSW_SUCCESS;
}
""" % locals()
for enc2 in ('UTF8',):
for enc1 in coerce_combos[enc2]:
type1 = types[enc1]
type2 = types[enc2]
getnext1 = getnext[enc1].replace('VARC', 'c').replace('VARP', 'sp').replace("\n", "\n ")
output += """
static fsw_status_t fsw_strcoerce_%(enc1)s_%(enc2)s(void *srcdata, int srclen, struct fsw_string *dest)
{
fsw_status_t status;
int i, destsize;
%(type1)s *sp;
%(type2)s *dp;
fsw_u32 c;
sp = (%(type1)s *)srcdata;
destsize = 0;
for (i = 0; i < srclen; i++) {
%(getnext1)s
if (c < 0x000080)
destsize++;
else if (c < 0x000800)
destsize += 2;
else if (c < 0x010000)
destsize += 3;
else
destsize += 4;
}
dest->type = FSW_STRING_TYPE_%(enc2)s;
dest->len = srclen;
dest->size = destsize;
status = fsw_alloc(dest->size, &dest->data);
if (status)
return status;
sp = (%(type1)s *)srcdata;
dp = (%(type2)s *)dest->data;
for (i = 0; i < srclen; i++) {
%(getnext1)s
if (c < 0x000080) {
*dp++ = c;
} else if (c < 0x000800) {
*dp++ = 0xc0 | ((c >> 6) & 0x1f);
*dp++ = 0x80 | (c & 0x3f);
} else if (c < 0x010000) {
*dp++ = 0xe0 | ((c >> 12) & 0x0f);
*dp++ = 0x80 | ((c >> 6) & 0x3f);
*dp++ = 0x80 | (c & 0x3f);
} else {
*dp++ = 0xf0 | ((c >> 18) & 0x07);
*dp++ = 0x80 | ((c >> 12) & 0x3f);
*dp++ = 0x80 | ((c >> 6) & 0x3f);
*dp++ = 0x80 | (c & 0x3f);
}
}
return FSW_SUCCESS;
}
""" % locals()
# coerce functions with destination UFT16_SWAPPED missing by design
# write output file
f = file("fsw_strfunc.h", "w")
f.write(output)
f.close()
# EOF
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