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moveconfig: expand simple expressions

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Add support for expanding simple expressions and sizes such as
"(4 * 1024)", "(512 << 10)" or "(SZ_256K)".

This can help to significantly reduce the number of "suspicious"
moves, such as

 'CONFIG_ENV_SIZE="(64 << 10)"' was removed by savedefconfig.

If the expansion fails, it falls back to the original string.

Signed-off-by: Markus Klotzbuecher <markus.klotzbuecher@kistler.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Heiko Schocher <hs@denx.de>
This commit is contained in:
Markus Klotzbuecher 2019-05-15 15:15:52 +02:00 committed by Heiko Schocher
parent e5aee22e4b
commit b237d358b4
1 changed files with 41 additions and 0 deletions
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41
tools/moveconfig.py
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@ -354,6 +354,26 @@ CONFIG_DATABASE = 'moveconfig.db'
CONFIG_LEN = len('CONFIG_')
SIZES = {
"SZ_1": 0x00000001, "SZ_2": 0x00000002,
"SZ_4": 0x00000004, "SZ_8": 0x00000008,
"SZ_16": 0x00000010, "SZ_32": 0x00000020,
"SZ_64": 0x00000040, "SZ_128": 0x00000080,
"SZ_256": 0x00000100, "SZ_512": 0x00000200,
"SZ_1K": 0x00000400, "SZ_2K": 0x00000800,
"SZ_4K": 0x00001000, "SZ_8K": 0x00002000,
"SZ_16K": 0x00004000, "SZ_32K": 0x00008000,
"SZ_64K": 0x00010000, "SZ_128K": 0x00020000,
"SZ_256K": 0x00040000, "SZ_512K": 0x00080000,
"SZ_1M": 0x00100000, "SZ_2M": 0x00200000,
"SZ_4M": 0x00400000, "SZ_8M": 0x00800000,
"SZ_16M": 0x01000000, "SZ_32M": 0x02000000,
"SZ_64M": 0x04000000, "SZ_128M": 0x08000000,
"SZ_256M": 0x10000000, "SZ_512M": 0x20000000,
"SZ_1G": 0x40000000, "SZ_2G": 0x80000000,
"SZ_4G": 0x100000000
}
### helper functions ###
def get_devnull():
"""Get the file object of '/dev/null' device."""
@ -777,6 +797,25 @@ def cleanup_readme(configs, options):
with open('README', 'w') as f:
f.write(''.join(newlines))
def try_expand(line):
"""If value looks like an expression, try expanding it
Otherwise just return the existing value
"""
if line.find('=') == -1:
return line
try:
cfg, val = re.split("=", line)
val= val.strip('\"')
if re.search("[*+-/]|<<|SZ_+|\(([^\)]+)\)", val):
newval = hex(eval(val, SIZES))
print "\tExpanded expression %s to %s" % (val, newval)
return cfg+'='+newval
except:
print "\tFailed to expand expression in %s" % line
return line
### classes ###
class Progress:
@ -891,6 +930,8 @@ class KconfigParser:
else:
new_val = not_set
new_val = try_expand(new_val)
for line in dotconfig_lines:
line = line.rstrip()
if line.startswith(config + '=') or line == not_set: