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Tools: binary_to_compressed_c: Avoid ?? trigraphs sequences in string outputs (#839)

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This commit is contained in:
ocornut
2016-09-23 09:06:09 +02:00
parent 18d36e6f63
commit 7f51929dc4
1 changed files with 11 additions and 4 deletions
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15
extra_fonts/binary_to_compressed_c.cpp
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@@ -79,11 +79,18 @@ bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_b
if (use_base85_encoding)
{
fprintf(out, "static const char %s_%sdata_base85[%d+1] =\n \"", symbol, compressed_str, (int)((compressed_sz+3)/4)*5);
for (int i = 0; i < compressed_sz; i += 4)
char prev_c = 0;
for (int src_i = 0; src_i < compressed_sz; src_i += 4)
{
unsigned int d = *(unsigned int*)(compressed + i);
fprintf(out, "%c%c%c%c%c", Encode85Byte(d), Encode85Byte(d/85), Encode85Byte(d/7225), Encode85Byte(d/614125), Encode85Byte(d/52200625));
if ((i % 112) == 112-4)
// This is made a little more complicated by the fact that ??X sequences are interpreted as trigraphs by old C/C++ compilers. So we need to escape pairs of ??.
unsigned int d = *(unsigned int*)(compressed + src_i);
for (unsigned int n5 = 0; n5 < 5; n5++, d /= 85)
{
char c = Encode85Byte(d);
fprintf(out, (c == '?' && prev_c == '?') ? "\\%c" : "%c", c);
prev_c = c;
}
if ((src_i % 112) == 112-4)
fprintf(out, "\"\n \"");
}
fprintf(out, "\";\n\n");