when compiling the base example - error: "'base64_enc_len' was not declared in this scope"

[kwhizr]

Arduino IDE 1.6.12

'base64_enc_len' was not declared in this scope

[muhammedkanlidere]

Same issue did anyone fixed ?

[CvdH]

Not sure if any of you are still having this problem, but I ran into this as well (Arduino IDE 1.8.2) and fixed it by renaming the files and functions in the library that were causing the issues

[rkoptev]

Having the same issue (Arduino 1.8.5 & ESP8266). Looks like this file already defined somewhere in sources.

[SimonKlausLudwig]

same problem here. I just renamed the two files to MyBase64 and added
#include <WString.h>
to base64.h

[FlorSanders]

This issue still seems to persist on the ESP8266, the workaround proposed by @SimonKlausLudwig does work though, if anyone but me still might come across this issue.

[RohankumarM]

#if (defined(AVR))
#include <avr\pgmspace.h>
#else
#include <pgmspace.h>
#endif

const char PROGMEM b64_alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";

/* 'Private' declarations */
inline void a3_to_a4(unsigned char * a4, unsigned char * a3);
inline void a4_to_a3(unsigned char * a3, unsigned char * a4);
inline unsigned char b64_lookup(char c);

int base64_encode(char *output, char *input, int inputLen) {
int i = 0, j = 0;
int encLen = 0;
unsigned char a3[3];
unsigned char a4[4];

while(inputLen--) {
	a3[i++] = *(input++);
	if(i == 3) {
		a3_to_a4(a4, a3);

		for(i = 0; i < 4; i++) {
			output[encLen++] = pgm_read_byte(&b64_alphabet[a4[i]]);
		}

		i = 0;
	}
}

if(i) {
	for(j = i; j < 3; j++) {
		a3[j] = '\0';
	}

	a3_to_a4(a4, a3);

	for(j = 0; j < i + 1; j++) {
		output[encLen++] = pgm_read_byte(&b64_alphabet[a4[j]]);
	}

	while((i++ < 3)) {
		output[encLen++] = '=';
	}
}
output[encLen] = '\0';
return encLen;

}

int base64_decode(char * output, char * input, int inputLen) {
int i = 0, j = 0;
int decLen = 0;
unsigned char a3[3];
unsigned char a4[4];

while (inputLen--) {
	if(*input == '=') {
		break;
	}

	a4[i++] = *(input++);
	if (i == 4) {
		for (i = 0; i <4; i++) {
			a4[i] = b64_lookup(a4[i]);
		}

		a4_to_a3(a3,a4);

		for (i = 0; i < 3; i++) {
			output[decLen++] = a3[i];
		}
		i = 0;
	}
}

if (i) {
	for (j = i; j < 4; j++) {
		a4[j] = '\0';
	}

	for (j = 0; j <4; j++) {
		a4[j] = b64_lookup(a4[j]);
	}

	a4_to_a3(a3,a4);

	for (j = 0; j < i - 1; j++) {
		output[decLen++] = a3[j];
	}
}
output[decLen] = '\0';
return decLen;

}

int base64_enc_len(int plainLen) {
int n = plainLen;
return (n + 2 - ((n + 2) % 3)) / 3 * 4;
}

int base64_dec_len(char * input, int inputLen) {
int i = 0;
int numEq = 0;
for(i = inputLen - 1; input[i] == '='; i--) {
numEq++;
}

return ((6 * inputLen) / 8) - numEq;

}

inline void a3_to_a4(unsigned char * a4, unsigned char * a3) {
a4[0] = (a3[0] & 0xfc) >> 2;
a4[1] = ((a3[0] & 0x03) << 4) + ((a3[1] & 0xf0) >> 4);
a4[2] = ((a3[1] & 0x0f) << 2) + ((a3[2] & 0xc0) >> 6);
a4[3] = (a3[2] & 0x3f);
}

inline void a4_to_a3(unsigned char * a3, unsigned char * a4) {
a3[0] = (a4[0] << 2) + ((a4[1] & 0x30) >> 4);
a3[1] = ((a4[1] & 0xf) << 4) + ((a4[2] & 0x3c) >> 2);
a3[2] = ((a4[2] & 0x3) << 6) + a4[3];
}

inline unsigned char b64_lookup(char c) {
if(c >='A' && c <='Z') return c - 'A';
if(c >='a' && c <='z') return c - 71;
if(c >='0' && c <='9') return c + 4;
if(c == '+') return 62;
if(c == '/') return 63;
return -1;
}

[Davithronix]

Pls anyone who can help to solve this error code as below?

C:\Users\user\Documents\Arduino\libraries\WaziDev\src\WaziDev.cpp:188:18: error: 'base64_enc_len' was not declared in this scope
int encLen = base64_enc_len(len);
^~~~~~~~~~~~~~
C:\Users\user\Documents\Arduino\libraries\WaziDev\src\WaziDev.cpp:190:5: error: 'base64_encode' was not declared in this scope
base64_encode(h, buf, len);
^~~~~~~~~~~~~