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Additional checks to reduce the possibility of user error with snes_clk.txt clock offset file.

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This commit is contained in:
Kreeblah 2021-01-31 00:16:16 -08:00
parent bfcf20142e
commit b5847b2ab1
1 changed files with 21 additions and 3 deletions
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24
Cart_Reader/snes_clk.cpp
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@ -6,20 +6,38 @@ int32_t readClockOffset() {
unsigned char* clock_buf; unsigned char* clock_buf;
int16_t i; int16_t i;
int32_t clock_offset; int32_t clock_offset;
if(!clock_file.open("/snes_clk.txt", FILE_READ)) { if(!clock_file.open("/snes_clk.txt", FILE_READ)) {
return INT32_MIN; return INT32_MIN;
} }
clock_buf = malloc(16 * sizeof(char)); clock_buf = malloc(12 * sizeof(char));
i = clock_file.read(clock_buf, 16); i = clock_file.read(clock_buf, 11);
clock_file.close(); clock_file.close();
if(i == -1) { if(i == -1) {
free(clock_buf); free(clock_buf);
return INT32_MIN; return INT32_MIN;
} else if(i < 16) { } else if((i == 11) && (clock_buf[0] != '-')) {
free(clock_buf);
return INT32_MIN;
} else {
clock_buf[i] = 0; clock_buf[i] = 0;
} }
for(i = 0; i < 12; i++) {
if(clock_buf[i] != '-' && clock_buf[i] < '0' && clock_buf[i] > '9') {
if(i == 0) {
free(clock_buf);
return INT32_MIN;
} else if((i == 1) && (clock_buf[0] == '-')) {
free(clock_buf);
return INT32_MIN;
} else {
clock_buf[i] = 0;
}
}
}
clock_offset = (int32_t)atoi(clock_buf); clock_offset = (int32_t)atoi(clock_buf);
free(clock_buf); free(clock_buf);