fixed some unsigned/signed compile warnings warnings & unused variables #4639

rommo911 · 2025-04-09T13:20:56Z

fixed some unsigned/signed compile warnings warnings & unused variables

Summary by CodeRabbit

Refactor
- Improved internal data consistency and indexing to ensure reliable handling of system resources.
- Streamlined variable usage to align with expected data ranges, reducing potential warnings and enhancing overall stability.
- Minor code optimizations have been applied to maintain a robust and responsive experience without altering user-facing functionality.

…es warnings

coderabbitai · 2025-04-09T13:21:09Z

Walkthrough

This pull request updates several variable declarations to use size_t for loop indices and selected values instead of signed integer types, ensuring type consistency with unsigned return values. Additionally, an unused variable in the connection handling logic is explicitly marked to prevent compiler warnings. These modifications span multiple files and improve type safety and code clarity in areas of indexing and variable usage.

Changes

Files	Change Summary
wled00/FX_fcn.cpp, wled00/network.cpp, wled00/xml.cpp, wled00/wled.h	Updated variable types from `int`/`int8_t` to `size_t` for loop indices and selected values to match unsigned return types and prevent signed/unsigned issues.
wled00/wled.cpp	Marked the `nowS` variable with `__attribute__((unused))` in the `handleConnection` method to suppress compiler warnings about unused variables.

Possibly Related PRs

"Unlimited" buses #4529: Modifies the finalizeInit method in the WS2812FX class with improvements in pointer safety and const correctness, aligning closely with the changes made in this pull request.

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📥 Commits

Reviewing files that changed from the base of the PR and between e979c58 and 945a477.

📒 Files selected for processing (5)

wled00/FX_fcn.cpp (1 hunks)
wled00/network.cpp (1 hunks)
wled00/wled.cpp (1 hunks)
wled00/wled.h (1 hunks)
wled00/xml.cpp (1 hunks)

🧰 Additional context used

🧬 Code Graph Analysis (1)

wled00/FX_fcn.cpp (2)

wled00/FX.h (11)

i (615-615)

i (615-615)

i (663-663)

i (668-668)

i (669-669)

i (669-669)

i (670-670)

i (670-670)

i (675-675)

i (676-676)

i (937-937)

wled00/bus_manager.h (2)

getNumBusses (471-471)

getNumBusses (471-471)

🔇 Additional comments (5)

wled00/wled.h (1)

370-370: Improved type safety by using size_t for index variable

Changing selectedWiFi from int8_t to size_t is a good practice for variables used as array indices. This type is unsigned and better matches the return types of container size functions, preventing potential compiler warnings about signed/unsigned comparisons.

wled00/wled.cpp (1)

753-753: Good use of __attribute__((unused)) to suppress compiler warning

Adding the __attribute__((unused)) attribute to nowS correctly signals to the compiler that this variable is intentionally not used in the current code. This prevents compiler warnings about unused variables while maintaining the variable for potential future use or debugging purposes.

wled00/network.cpp (1)

299-299: Consistent type usage for selected variable

Changing the local variable selected from int to size_t ensures type consistency with the global variable selectedWiFi that was also changed to size_t. This prevents any potential signed/unsigned comparison issues and improves the overall type safety of the code.

wled00/FX_fcn.cpp (1)

1498-1498: Improved loop counter type to match return type of getNumBusses()

Changing the loop counter variable i from int to size_t properly aligns its type with the return type of BusManager::getNumBusses(), which returns size_t. This eliminates potential compiler warnings about signed/unsigned comparisons in the loop condition.

wled00/xml.cpp (1)

298-298: Good type change to prevent signed/unsigned comparison warnings

Changing the loop variable from int to size_t is appropriate since it's being compared with BusManager::getNumBusses(), which returns an unsigned type. This eliminates signed/unsigned comparison warnings and improves type safety.

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DedeHai · 2025-04-09T15:27:14Z

wled00/wled.h

@@ -367,7 +367,7 @@ WLED_GLOBAL wifi_options_t wifiOpt _INIT_N(({0, 1, false, AP_BEHAVIOR_BOOT_NO_CO
 #define noWifiSleep  wifiOpt.noWifiSleep
 #define force802_3g  wifiOpt.force802_3g
 #else
-WLED_GLOBAL int8_t selectedWiFi  _INIT(0);
+WLED_GLOBAL size_t selectedWiFi  _INIT(0);


this wastes precious ram

in that case i will put uint8_t

not a good idea, it must be signed.
unless you went through all the code where its used and are 100% sure unsigned does not lead to any undefined behavirou.

yes i have wen through all the code and ensured that its only used with positive numbers and size_t comparison.
let me know if you think i should uint8_t or just revert it

Leave the networking code alone.
I have a huge modification of it waiting for upstream.

alright then

DedeHai · 2025-04-13T07:08:39Z

in general: if you use size_t make sure there are no compile errors on all supported platforms. Did you run it on all envs?

blazoncek

I do not agree to any change. No reason given.

rommo911 · 2025-04-13T13:12:06Z

in general: if you use size_t make sure there are no compile errors on all supported platforms. Did you run it on all envs?

as its related to wifi , i have compiled of course all esp platforms ( esp32 / S2 / C3 / ESP8266)
the reason is to avoid compiler warnings because once we have too many warnings around we could start to ignore the serious warnings...

fixed some unsigned/signed compile warnings warnings & unused variabl…

945a477

…es warnings

DedeHai reviewed Apr 9, 2025

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fixed some unsigned/signed compile warnings warnings & unused variables #4639

fixed some unsigned/signed compile warnings warnings & unused variables #4639

rommo911 commented Apr 9, 2025 •

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rommo911 commented Apr 13, 2025

fixed some unsigned/signed compile warnings warnings & unused variables #4639

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fixed some unsigned/signed compile warnings warnings & unused variables #4639

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