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commit 477a02f63751c4b759ddd9454d17f2a7ad120ee3
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Author: Joseph Myers <joseph@codesourcery.com>
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Date: Mon Dec 3 22:08:50 2018 +0000
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520cc8 |
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Make gen-as-const.py handle '--' consistently with awk script.
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520cc8 |
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It was reported in
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<https://sourceware.org/ml/libc-alpha/2018-12/msg00045.html> that
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gen-as-const.py fails to generate test code in the case where a .sym
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file has no symbols in it, so resulting in a test failing to link for
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Hurd.
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The relevant difference from the old awk script is that the old script
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treated '--' lines as indicating that the text to do at the start of
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the test (or file used to compute constants) should be output at that
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point if not already output, as well as treating lines with actual
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entries for constants like that. This patch changes gen-as-const.py
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accordingly, making it the sole responsibility of the code parsing
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.sym files to determine when such text should be output and ensuring
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it's always output at some point even if there are no symbols and no
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'--' lines, since not outputting it means the test fails to link.
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Handling '--' like that also avoids any problems that would arise if
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the first entry for a symbol were inside #ifdef (since the text in
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question must not be output inside #ifdef).
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Tested for x86_64, and with build-many-glibcs.py for i686-gnu. Note
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that there are still compilation test failures for i686-gnu
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(linknamespace tests, possibly arising from recent posix_spawn-related
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changes).
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* scripts/gen-as-const.py (compute_c_consts): Take an argument
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'START' to indicate that start text should be output.
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(gen_test): Likewise.
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(main): Generate 'START' for first symbol or '--' line, or at end
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of input if not previously generated.
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diff --git a/scripts/gen-as-const.py b/scripts/gen-as-const.py
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index cabf401ed15e8367..eb85ef1aa0f4934d 100644
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--- a/scripts/gen-as-const.py
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+++ b/scripts/gen-as-const.py
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@@ -34,28 +34,28 @@ def compute_c_consts(sym_data, cc):
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"""Compute the values of some C constants.
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The first argument is a list whose elements are either strings
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- (preprocessor directives) or pairs of strings (a name and a C
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+ (preprocessor directives, or the special string 'START' to
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+ indicate this function should insert its initial boilerplate text
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+ in the output there) or pairs of strings (a name and a C
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expression for the corresponding value). Preprocessor directives
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in the middle of the list may be used to select which constants
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end up being evaluated using which expressions.
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"""
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out_lines = []
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- started = False
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for arg in sym_data:
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if isinstance(arg, str):
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- out_lines.append(arg)
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+ if arg == 'START':
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+ out_lines.append('void\ndummy (void)\n{')
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+ else:
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+ out_lines.append(arg)
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continue
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name = arg[0]
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value = arg[1]
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- if not started:
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- out_lines.append('void\ndummy (void)\n{')
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- started = True
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out_lines.append('asm ("@@@name@@@%s@@@value@@@%%0@@@end@@@" '
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': : \"i\" ((long int) (%s)));'
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% (name, value))
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- if started:
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- out_lines.append('}')
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+ out_lines.append('}')
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out_lines.append('')
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out_text = '\n'.join(out_lines)
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with tempfile.TemporaryDirectory() as temp_dir:
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@@ -89,32 +89,32 @@ def gen_test(sym_data):
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"""
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out_lines = []
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- started = False
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for arg in sym_data:
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if isinstance(arg, str):
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- out_lines.append(arg)
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+ if arg == 'START':
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+ out_lines.append('#include <stdint.h>\n'
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+ '#include <stdio.h>\n'
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+ '#include <bits/wordsize.h>\n'
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+ '#if __WORDSIZE == 64\n'
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+ 'typedef uint64_t c_t;\n'
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+ '# define U(n) UINT64_C (n)\n'
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+ '#else\n'
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ 'typedef uint32_t c_t;\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ '# define U(n) UINT32_C (n)\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ '#endif\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ 'static int\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ 'do_test (void)\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ '{\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ # Compilation test only, using static
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ # assertions.
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ ' return 0;\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ '}\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ '#include <support/test-driver.c>')
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ else:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ out_lines.append(arg)
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
continue
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
name = arg[0]
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
value = arg[1]
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- if not started:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- out_lines.append('#include <stdint.h>\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '#include <stdio.h>\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '#include <bits/wordsize.h>\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '#if __WORDSIZE == 64\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- 'typedef uint64_t c_t;\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '# define U(n) UINT64_C (n)\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '#else\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- 'typedef uint32_t c_t;\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '# define U(n) UINT32_C (n)\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '#endif\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- 'static int\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- 'do_test (void)\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '{\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- # Compilation test only, using static assertions.
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- ' return 0;\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '}\n'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- '#include <support/test-driver.c>')
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
- started = True
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
out_lines.append('_Static_assert (U (asconst_%s) == (c_t) (%s), '
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
'"value of %s");'
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
% (name, value, name))
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
@@ -134,6 +134,7 @@ def main():
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
args = parser.parse_args()
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
sym_data = []
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
with open(args.sym_file, 'r') as sym_file:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ started = False
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
for line in sym_file:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
line = line.strip()
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
if line == '':
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
@@ -143,12 +144,17 @@ def main():
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
sym_data.append(line)
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
continue
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
words = line.split(maxsplit=1)
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ if not started:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ sym_data.append('START')
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ started = True
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
# Separator.
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
if words[0] == '--':
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
continue
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
name = words[0]
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
value = words[1] if len(words) > 1 else words[0]
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
sym_data.append((name, value))
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ if not started:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
+ sym_data.append('START')
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
if args.test:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
print(gen_test(sym_data))
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
520cc8 |
else:
|