1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
|
# Copyright (C) 2007-2024 S[&]T, The Netherlands.
# 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 copyright holder 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 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 HOLDER 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.
from __future__ import print_function
import cffi
import re
import sys
# Import the StringIO class that uses the default str type on each major version
# of Python.
#
# The StringIO.StringIO class is Python 2 specific and works with byte strings,
# i.e. instances of class str.
#
# The io.StringIO class exists in both Python 2 and Python 3, and always uses
# unicode strings, i.e. instances of class unicode on Python 2 and of class str
# on Python 3.
#
try:
from cStringIO import StringIO
except ImportError:
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
class Error(Exception):
pass
class SyntaxError(Error):
pass
def read_header_file(filename):
cdefs = StringIO()
active = False
# TODO get all info from header file?
cdefs.write("""
typedef ... coda_product;
typedef ... coda_type;
# define MAX_NUM_DIMS 8
# define CODA_CURSOR_MAXDEPTH 32
typedef struct
{
coda_product *product;
int n;
struct
{
void *type;
long index;
int64_t bit_offset;
} stack[CODA_CURSOR_MAXDEPTH];
} coda_cursor;
""");
with open(filename) as header_file:
for (line_no, line) in enumerate(header_file):
if re.match(r"^\s*/\*\s*\*CFFI-ON\*\s*\*/\s*$", line) or re.match(r"^\s*//\s*\*CFFI-ON\*\s*$", line):
if active:
raise SyntaxError("%s:%lu: CFFI-ON marker inside CFFI block" % (filename, line_no))
active = True
continue
if re.match(r"^\s*/\*\s*\*CFFI-OFF\*\s*\*/\s*$", line) or re.match(r"^\s*//\s*\*CFFI-OFF\*\s*$", line):
if not active:
raise SyntaxError("%s:%lu: CFFI-OFF marker outside CFFI block" % (filename, line_no))
active = False
continue
# Remove LIBCODA_API prefix.
line = re.sub(r"^\s*LIBCODA_API\s*", "", line)
# Remove brackets from #define statements, since in ABI mode cffi only accepts #define followed by a numeric
# constant.
match_obj = re.match(r"^\s*#define\s+(\w+)\s+\(([^)]+)\)\s*$", line)
if match_obj:
name = match_obj.group(1)
try:
value = int(match_obj.group(2))
except ValueError:
try:
value = float(match_obj.group(2))
except ValueError:
# If the value cannot be parsed as an int or float, output the original line without
# modification.
pass
else:
line = "#define %s %f\n" % (name, value)
else:
line = "#define %s %d\n" % (name, value)
if active:
cdefs.write(line)
if active:
raise SyntaxError("%s:%lu: unterminated CFFI block; CFFI-OFF marker missing" % (filename, line_no))
return cdefs.getvalue()
def main(header_path, output_path):
ffi = cffi.FFI()
ffi.set_source("_codac", None)
ffi.cdef(read_header_file(header_path))
ffi.emit_python_code(output_path)
if __name__ == "__main__":
if len(sys.argv) != 3:
print("usage: %s <path to coda.h.in> <output Python file>" % sys.argv[0])
print("generate Python wrapper for the CODA C library using cffi (ABI level, out-of-line)")
sys.exit(1)
try:
main(sys.argv[1], sys.argv[2])
except Error as _error:
print("ERROR: %s" % _error)
sys.exit(1)
|