https://gitlab.synchro.net/main/sbbs/-/commit/a710f6ffb3edb43946b3008d
Modified Files:
src/sbbs3/str_util.c str_util.h
Log Message:
Add strip_cp437_graphics() and have strip_ctrl() remove DEL chars too

strip_cp437_graphics() is like strip_exascii(), except it'll leave the foreign language characters and math symbols intact (removing just the common "block" and "line-drawing" characters).

DEL (0x7F) is a control character too, so have strip_ctrl() remove it.

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https://gitlab.synchro.net/main/sbbs/-/commit/6966a81b8d08c75b86277e30
Modified Files:
src/sbbs3/str_util.c str_util.h
Log Message:
Create i64toac() to generate comma-separated ASCII string of 64-bit int

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https://gitlab.synchro.net/main/sbbs/-/commit/aa592e35b8008ccdb9bfb88e
Modified Files:
src/sbbs3/str_util.c str_util.h
Log Message:
Create replace_chars(), a wrapper for REPLACE_CHARS()

The iteration variable (p) is created on the stack.

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https://gitlab.synchro.net/main/sbbs/-/commit/d72b0cd2a76ee5c095553e4c
Modified Files:
src/sbbs3/str_util.c str_util.h
Log Message:
Add contains_invalid_attr() - checks string for invalid attr Ctrl-A codes

Other Ctrl-A codes (e.g. ^A\) might be valid, but they're not attribute
control codes, so their existence would cause this function to return true.

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