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Non-latin1 interpretation characters crash png output.

Browse source 
https://sourceforge.net/p/zint/tickets/11/
This commit is contained in:
Harald Oehlmann 2016-01-04 18:10:44 +01:00
parent a31e562fd4
commit 2a1d6b8e48
1 changed files with 20 additions and 11 deletions
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31
backend/png.c
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@ -690,6 +690,7 @@ int maxi_png_plot(struct zint_symbol *symbol, int rotate_angle, int data_type)
return error_number;
}
/* Convert UTF-8 to Latin1 Codepage for the interpretation line */
void to_latin1(unsigned char source[], unsigned char preprocessed[])
{
int j, i, input_length;
@ -699,22 +700,30 @@ void to_latin1(unsigned char source[], unsigned char preprocessed[])
j = 0;
i = 0;
while (i < input_length) {
if(source[i] < 128) {
switch (source[i]) {
case 0xC2:
/* UTF-8 C2xxh */
/* Character range: C280h (latin: 80h) to C2BFh (latin: BFh) */
i++;
preprocessed[j] = source[i];
j++;
i++;
} else {
if(source[i] == 0xC2) {
preprocessed[j] = source[i + 1];
break;
case 0xC3:
/* UTF-8 C3xx */
/* Character range: C380h (latin: C0h) to C3BFh (latin: FFh) */
i++;
preprocessed[j] = source[i] + 64;
j++;
break;
default:
/* Process ASCII (< 80h), all other unicode points are ignored */
if(source[i] < 128) {
preprocessed[j] = source[i];
j++;
i += 2;
}
if(source[i] == 0xC3) {
preprocessed[j] = source[i + 1] + 64;
j++;
i += 2;
}
break;
}
i++;
}
preprocessed[j] = '\0';