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Added extractModeName() utility function.

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This commit is contained in:
Blaz Kristan 2022-01-31 20:43:35 +01:00
parent be8a9ae73b
commit 6e0e5c102e
2 changed files with 36 additions and 0 deletions
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1
wled00/fcn_declare.h
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@ -222,6 +222,7 @@ void sendSysInfoUDP();
//bool isAsterisksOnly(const char* str, byte maxLen);
bool requestJSONBufferLock(uint8_t module=255);
void releaseJSONBufferLock();
uint8_t extractModeName(uint8_t mode, const char *src, char *dest, uint8_t maxLen);
//um_manager.cpp
class Usermod {

35
wled00/util.cpp
View File

@ -31,3 +31,38 @@ void releaseJSONBufferLock()
fileDoc = nullptr;
jsonBufferLock = 0;
}
// extracts effect mode (or palette) name from names serialized string
// caller must provide large enough buffer for name (incluing SR extensions)!
uint8_t extractModeName(uint8_t mode, const char *src, char *dest, uint8_t maxLen)
{
uint8_t qComma = 0;
bool insideQuotes = false;
uint8_t printedChars = 0;
char singleJsonSymbol;
size_t len = strlen_P(src);
// Find the mode name in JSON
for (size_t i = 0; i < len; i++) {
singleJsonSymbol = pgm_read_byte_near(src + i);
if (singleJsonSymbol == '\0') break;
if (singleJsonSymbol == '@' && insideQuotes && qComma == mode) break; //stop when SR extension encountered
switch (singleJsonSymbol) {
case '"':
insideQuotes = !insideQuotes;
break;
case '[':
case ']':
break;
case ',':
if (!insideQuotes) qComma++;
default:
if (!insideQuotes || (qComma != mode)) break;
dest[printedChars++] = singleJsonSymbol;
}
if ((qComma > mode) || (printedChars >= maxLen)) break;
}
dest[printedChars] = '\0';
return strlen(dest);
}