Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
strcasestr optimize for speed and size
revisit this and shave a bit more off on code size
Change-Id: I90546b931780c6779960129619a41cc6592c44e1
authored by
William Wilgus
and committed by
William Wilgus
27aff7ec
6f542b65
+23
-25
+23
-25
firmware/common/strcasestr.c
+23
-25
firmware/common/strcasestr.c
···
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#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
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char* strcasestr (const char* haystack, const char* needle)
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{
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-
chartype needle_ch = tolower(*needle++);
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chartype needle_upch = toupper(needle_ch);
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chartype ch_h;
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char* match = (char*)haystack; /* if needle empty return haystack */
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const char* match, *needle_search;
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chartype needle_ch, needle_upch, ch_h;
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if (needle_ch != 0) {
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if (*needle == 0) /* if needle empty return haystack */
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return (char*)haystack;
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+
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while(1)
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{
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needle_search = needle;
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needle_ch = tolower(*needle_search++);
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needle_upch = toupper(needle_ch);
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/* find the first matching character */
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do {
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do
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{
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ch_h = *haystack++;
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if (ch_h == 0) /* end of haystack no match.. */
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return NULL;
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} while (ch_h != needle_ch && ch_h != needle_upch);
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match = haystack;
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goto case_match;
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match = (char*) haystack - 1;
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/* find the first non-matching character */
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lcase_match:
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while (ch_h == needle_ch) {
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ch_h = *haystack++;
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needle_ch = tolower(*needle++);
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while (ch_h == needle_ch)
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{
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case_match:
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ch_h = *match++;
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needle_ch = tolower(*needle_search++);
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if (needle_ch == 0) /* end of needle, found match.. */
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return match;
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return (char*)haystack - 1;
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}
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/* lcase or ucase match */
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needle_upch = toupper(needle_ch);
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while (ch_h == needle_upch || ch_h == needle_ch) {
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ch_h = *haystack++;
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needle_ch = tolower(*needle++);
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if (needle_ch == 0) /* end of needle, found match.. */
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return match;
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-
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if (ch_h == needle_ch)
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goto lcase_match;
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needle_upch = toupper(needle_ch);
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}
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match = NULL;
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if (ch_h == needle_upch)
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goto case_match;
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haystack = match;
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}
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return match;
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}
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#else
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char* strcasestr (const char* phaystack, const char* pneedle)