dep/libchdr: Add chd_is_matching_parent()
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@ -48,6 +48,7 @@ extern "C" {
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#include <libchdr/coretypes.h>
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#include <libchdr/chdconfig.h>
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#include <stdbool.h>
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/***************************************************************************
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@ -402,6 +403,7 @@ CHD_EXPORT const chd_header *chd_get_header(chd_file *chd);
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CHD_EXPORT chd_error chd_read_header_core_file(core_file *file, chd_header *header);
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CHD_EXPORT chd_error chd_read_header_file(FILE *file, chd_header *header);
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CHD_EXPORT chd_error chd_read_header(const char *filename, chd_header *header);
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CHD_EXPORT bool chd_is_matching_parent(const chd_header* header, const chd_header* parent_header);
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@ -2056,6 +2056,27 @@ CHD_EXPORT chd_error chd_read_header(const char *filename, chd_header *header)
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return err;
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}
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CHD_EXPORT bool chd_is_matching_parent(const chd_header* header, const chd_header* parent_header)
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{
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/* check MD5 if it isn't empty */
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if (memcmp(nullmd5, header->parentmd5, sizeof(header->parentmd5)) != 0 &&
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memcmp(nullmd5, parent_header->md5, sizeof(parent_header->md5)) != 0 &&
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memcmp(parent_header->md5, header->parentmd5, sizeof(header->parentmd5)) != 0)
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{
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return false;
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}
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/* check SHA1 if it isn't empty */
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if (memcmp(nullsha1, header->parentsha1, sizeof(header->parentsha1)) != 0 &&
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memcmp(nullsha1, parent_header->sha1, sizeof(parent_header->sha1)) != 0 &&
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memcmp(parent_header->sha1, header->parentsha1, sizeof(header->parentsha1)) != 0)
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{
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return false;
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}
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return true;
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}
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/***************************************************************************
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CORE DATA READ/WRITE
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***************************************************************************/
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