Fix improperly mutable pointers to string constants #30804
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PR #30804: Size comparison from b9ff894 to 65e4e57 Decreases (5 builds for cc32xx, mbed, qpg)
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PR #30804: Size comparison from b9ff894 to 973c9cb Decreases (15 builds for cc13x4_26x4, cc32xx, k32w, mbed, qpg)
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PR #30804: Size comparison from b9ff894 to 423de24 Increases above 0.2%:
Increases (7 builds for esp32, linux, psoc6)
Decreases (31 builds for cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, k32w, linux, mbed, psoc6, qpg)
Full report (31 builds for cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, k32w, linux, mbed, psoc6, qpg)
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PR #30804: Size comparison from b9ff894 to c0a120c Decreases (15 builds for cc13x4_26x4, cc32xx, k32w, mbed, qpg)
Full report (15 builds for cc13x4_26x4, cc32xx, k32w, mbed, qpg)
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The declaration
const char * kStringConstant = "value";
declares a mutable pointer to const C string, and so the following
assignment is legal:
kStringConstant = "other value";
Obviously this is not desired. Declaring as "const char * const" avoids
this, but this declares an unnecessary pointer.
Change these declarations to "const(expr) char []".
These edits were made by the following command:
find . -name .git -prune -o -name .environment -prune -o -name third_party -prune -o -name zzz_generated -prune -o -name out -prune -o -type f \( -name '*.cpp' -o -name '*.h' \) -exec sed -i 's,^\( *\)\(static \|extern \|\)\(inline \|\)\(constexpr \|\)const char *\* * k\([A-Z][^][ ;()]*\)\( \|;\),\1\2\3\4const char k\5[]\6,g; s,^\([^()]*\)constexpr const char k\([^()]*\)\( \|;\),\1constexpr char k\2\3,g; s,^\( *\)const\(expr\|\) char \([^()]*\)\[\] *= ",\1static const\2 char \3[] = ",g' {} +
with 2 fixes to add "inline" in constants defined in headers.
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PR #30804: Size comparison from b9ff894 to f0043de Increases above 0.2%:
Increases (15 builds for bl602, bl702, bl702l, cc13x4_26x4, linux)
Decreases (27 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, k32w, linux, mbed, qpg)
Full report (27 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, k32w, linux, mbed, qpg)
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PR #30804: Size comparison from 16f8d7a to 6bcf708 Decreases (2 builds for cc32xx)
Full report (2 builds for cc32xx)
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Fix static variables inside functions not named in kConstantNamingStyle:
find . -name .git -prune -o -name .environment -prune -o -name third_party -prune -o -name zzz_generated -prune -o -name out -prune -o -type f \( -name '*.cpp' -o -name '*.h' \) -exec sed -i 's,^\( *\)\(static \|extern \)\(inline \|\)\(constexpr \|\)const char *\* * \([^][ ;()]*\)\( *= *"\|;\),\1\2\3\4const char \5[]\6,g' {} +
Fix file scoped variables not named named in kConstantNamingStyle:
find . -name .git -prune -o -name .environment -prune -o -name third_party -prune -o -name zzz_generated -prune -o -name out -prune -o -type f \( -name '*.cpp' -o -name '*.h' \) -exec sed -i 's,^\(\)\(static \|extern \|\)\(inline \|\)\(constexpr \|\)const char *\* * \([^][ ;()]*\)\( *= *"\|;\),\1\2\3\4const char \5[]\6,g' {} +
find . -name .git -prune -o -name .environment -prune -o -name third_party -prune -o -name zzz_generated -prune -o -name out -prune -o -type f \( -name '*.cpp' -o -name '*.h' -o -name '*.mm' \) -exec sed -i 's,^\( *\)\(static \|extern \|\)\(inline \|\)\(constexpr \|\)const char *\* * k\([A-Z][^][ ;()]*\)\( \|;\),\1\2\3\4const char k\5[]\6,g; s,^\([^()]*\)constexpr const char k\([^()]*\)\( \|;\),\1constexpr char k\2\3,g; s,^\( *\)const\(expr\|\) char \([^()]*\)\[\] *= ",\1static const\2 char \3[] = ",g' {} +
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PR #30804: Size comparison from 16f8d7a to aba4909 Increases above 0.2%:
Increases (33 builds for bl602, bl702, bl702l, cc13x4_26x4, esp32, linux, psoc6, telink)
Decreases (82 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, psoc6, qpg, telink)
Full report (83 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, psoc6, qpg, telink)
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Damian-Nordic
approved these changes
Dec 5, 2023
andy31415
approved these changes
Dec 5, 2023
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The declaration
declares a mutable pointer to const C string, and so the following assignment is legal:
Obviously this is not desired. Declaring as "const char * const" avoids this, but this declares an unnecessary pointer.
Change these declarations to "const(expr) char []".
These edits were made by the following command:
with 2 fixes to add "inline" in constants defined in headers.