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Guard against single operand multiplication when detecting like terms This *shouldn't* happen, but it apparently does in some pathological cases so guard against a single operand multiplication to prevent a crash.
author William Astle <lost@l-w.ca>
date Mon, 04 Nov 2024 23:48:23 -0700
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1 The official distribution point for lwtools is
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2 http://lwtools.projects.l-w.ca/. If you obtained this distribution from any
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3 other place, please visit the official site. You may have a modified or out
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4 of date version.
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5
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6 This is LWTOOLS, a cross development system targetting the 6809 CPU.
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7
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8 It consists of an assembler, lwasm, a linker, lwlink, and an archiver,
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9 lwar which should compile on any reasonably modern POSIX environment. If you
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10 have problems building, make sure you are using GNU make. Other make
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11 programs may work but GNU make is known to work.
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12
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13 There is some source code support for building with Microsoft's compiler on
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14 Windows. However, this has been contributed by interested users and is not
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15 well tested. Indeed, the primary maintainer has no access to such a system.
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17 To see if a quick build will work, just type "make". If it works, you're
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18 ready to go ahead with "make install". This will install in /usr/local/bin.
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19
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20 If you feel adventurous, you can also run the test suite by running "make
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21 test". However, be warned that it is likely not going to work unless you are
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22 running on a fairly standard unix system with perl in /usr/bin/perl.
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23
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24 See docs/ for additional information.
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25
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26 CONTRIBUTING
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27 ============
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28
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29 If you wish to contribute patches or code to lwtools, please keep the
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30 following in mind.
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31
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32 Evangelism
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33 ----------
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34
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35 Any communication that includes evangelism for alternate revision control
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36 systems, coding styles, development methodologies, or similar will be
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37 deleted with all other contents ignored. So just don't do it and save
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38 yourself and the project maintainers time.
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39
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40 Style
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41 -----
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42
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43 The code formatting style must match the rest of the lwtools code. Code
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44 submitted in the "1TBS" will be rejected out of hand. Attempts to convince
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45 me to change my mind on this point will be routed to /dev/null at best and
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46 likely met with extreme rudeness.
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47
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48 C code should be formatted as follows:
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49
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50 * In general, match the formatting of the surrounding code, whether that
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51 uses spaces or tabs. Otherwise, all indentation uses a single TAB
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52 character for each step. That is a HARD tab, not a series of spaces. TABs
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53 are assumed to be 4 characters though that will largely impact only lining
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54 up comments and tabular code. If the actual formatting of the code is
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55 critical, spaces may be used for that formatting but the actual initial
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56 indentation of the lines MUST use TAB characters.
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57 * The opening brace for a block appears on the line below the control
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58 structure that introduces it. It appears lined up with the preceding line
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59 and nothing else appears on the same line.
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60 * Closing braces appear on a line by themselves ordinarily. The exception is
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61 the "while" keyword in a "do-while" statement appears on the same line as
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62 the closing brace for the block.
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63 * Case labels are lined up with the enclosing block (one level back from the
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64 code of the block). The same guideline applies for ordinarily labels.
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65 * No spaces surround parentheses, brackets, or the dot operator. No space
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66 precedes a comma but a space should follow it. Other operators should
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67 usually be surrounded by spaces. A space should separate a keyword from
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68 any surrounding except for sizeof() which should be written like a
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69 function call. There is no space between a function name and the start of
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70 its parameter list.
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71
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72 In general, study the existing source formatting and copy the style. This is
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73 what you should do anyway and the above should not be required.
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74
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75 For code accepted to the contrib/ hierarchy, application of the above coding
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76 style may be less strict.
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77
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78 Submitting
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79 ----------
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80
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81 Any attempts to evangelize git or any other alternative revision control
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82 system will be deleted with *all* other contents ignored.
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83
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84 When submitting code to lwtools, it should be submitted as a patch file (hg
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85 diff or diff -u). DO NOT submit entire source files. Remember, others may be
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86 working on changes, too, and your complete source files are difficult to
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87 merge with such situations. By submitting complete source files, you are
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88 making far more work for the maintainer and it is generally considered rude.
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89
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90 Always specify what version of the source you based your patch on. If
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91 possible, work off the default branch in the mercurial repository. At the
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92 very least, make sure you are working with the most recent release.
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93
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94 It is also worth checking with the maintainer before submitting a patch.
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95 There may be some reason why your pet feature is not present in the official
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96 release.
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97
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98 Finally, be prepared to receive a list of deficiencies or requests for
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99 improvements or clarification of why or how you did something.