80 lines
1.4 KiB
C
80 lines
1.4 KiB
C
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#include <ctype.h>
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#include "cache.h"
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static void flush_current_id(int patchlen, unsigned char *id, SHA_CTX *c)
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{
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unsigned char result[20];
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char name[50];
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if (!patchlen)
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return;
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SHA1_Final(result, c);
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memcpy(name, sha1_to_hex(id), 41);
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printf("%s %s\n", sha1_to_hex(result), name);
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SHA1_Init(c);
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}
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static int remove_space(char *line)
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{
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char *src = line;
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char *dst = line;
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unsigned char c;
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while ((c = *src++) != '\0') {
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if (!isspace(c))
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*dst++ = c;
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}
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return dst - line;
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}
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static void generate_id_list(void)
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{
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static unsigned char sha1[20];
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static char line[1000];
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SHA_CTX ctx;
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int patchlen = 0;
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SHA1_Init(&ctx);
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while (fgets(line, sizeof(line), stdin) != NULL) {
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unsigned char n[20];
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char *p = line;
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int len;
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if (!memcmp(line, "diff-tree ", 10))
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p += 10;
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if (!get_sha1_hex(p, n)) {
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flush_current_id(patchlen, sha1, &ctx);
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memcpy(sha1, n, 20);
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patchlen = 0;
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continue;
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}
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/* Ignore commit comments */
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if (!patchlen && memcmp(line, "diff ", 5))
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continue;
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/* Ignore line numbers when computing the SHA1 of the patch */
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if (!memcmp(line, "@@ -", 4))
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continue;
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/* Compute the sha without whitespace */
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len = remove_space(line);
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patchlen += len;
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SHA1_Update(&ctx, line, len);
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}
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flush_current_id(patchlen, sha1, &ctx);
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}
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static const char patch_id_usage[] = "usage: git-patch-id < patch";
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int main(int argc, char **argv)
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{
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if (argc != 1)
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usage(patch_id_usage);
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generate_id_list();
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return 0;
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}
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