2023-07-24 23:13:47 -07:00
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#include "base85.h"
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using std::vector;
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// Functions modified from Dear ImGui and renamed to avoid collisions.
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static unsigned int DecodeBase85Byte(char c) {
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return c >= '\\' ? c-36 : c-35;
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}
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2024-12-21 14:23:00 -08:00
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vector<unsigned char> *DecodeBase85(const char *src) {
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vector<unsigned char> *dst_vec = new vector<unsigned char>();
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dst_vec->resize(((strlen(src) + 4) / 5) * 4);
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unsigned char *dst = dst_vec->data();
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memset(dst, 0, dst_vec->size());
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2023-07-24 23:13:47 -07:00
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size_t dst_size = 0;
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while (*src)
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{
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unsigned int tmp = DecodeBase85Byte(src[0]) + 85 * (DecodeBase85Byte(src[1]) + 85 * (DecodeBase85Byte(src[2]) + 85 * (DecodeBase85Byte(src[3]) + 85 * DecodeBase85Byte(src[4]))));
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dst[0] = ((tmp >> 0) & 0xFF); dst[1] = ((tmp >> 8) & 0xFF); dst[2] = ((tmp >> 16) & 0xFF); dst[3] = ((tmp >> 24) & 0xFF); // We can't assume little-endianness.
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src += 5;
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2024-09-28 10:31:06 -07:00
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dst += 4;
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2023-07-24 23:13:47 -07:00
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dst_size += 4;
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}
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2024-12-21 14:23:00 -08:00
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dst_vec->resize(dst_size);
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2023-07-24 23:13:47 -07:00
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return dst_vec;
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}
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