From f5948cfe673ec65c09b926249cc02ab4451243fa Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Sat, 4 Mar 2006 02:51:19 -0800 Subject: [PATCH] count-delta: no need for this anymore. This is a companion patch to e29e1147e485654d90a0ea0fd5fb7151bb194265 which made diffcore similarity estimator independent from the packfile deltifier. There is no reason for us to be counting the xdelta anymore. Signed-off-by: Junio C Hamano --- Makefile | 4 +-- count-delta.c | 72 --------------------------------------------------- count-delta.h | 10 ------- 3 files changed, 2 insertions(+), 84 deletions(-) delete mode 100644 count-delta.c delete mode 100644 count-delta.h diff --git a/Makefile b/Makefile index b6d8804d4..ab2890d63 100644 --- a/Makefile +++ b/Makefile @@ -190,7 +190,7 @@ PYMODULES = \ LIB_FILE=libgit.a LIB_H = \ - blob.h cache.h commit.h count-delta.h csum-file.h delta.h \ + blob.h cache.h commit.h csum-file.h delta.h \ diff.h object.h pack.h pkt-line.h quote.h refs.h \ run-command.h strbuf.h tag.h tree.h git-compat-util.h revision.h @@ -200,7 +200,7 @@ DIFF_OBJS = \ diffcore-delta.o LIB_OBJS = \ - blob.o commit.o connect.o count-delta.o csum-file.o \ + blob.o commit.o connect.o csum-file.o \ date.o diff-delta.o entry.o exec_cmd.o ident.o index.o \ object.o pack-check.o patch-delta.o path.o pkt-line.o \ quote.o read-cache.o refs.o run-command.o \ diff --git a/count-delta.c b/count-delta.c deleted file mode 100644 index 058a2aadb..000000000 --- a/count-delta.c +++ /dev/null @@ -1,72 +0,0 @@ -/* - * Copyright (C) 2005 Junio C Hamano - * The delta-parsing part is almost straight copy of patch-delta.c - * which is (C) 2005 Nicolas Pitre . - */ -#include -#include -#include -#include "delta.h" -#include "count-delta.h" - -/* - * NOTE. We do not _interpret_ delta fully. As an approximation, we - * just count the number of bytes that are copied from the source, and - * the number of literal data bytes that are inserted. - * - * Number of bytes that are _not_ copied from the source is deletion, - * and number of inserted literal bytes are addition, so sum of them - * is the extent of damage. - */ -int count_delta(void *delta_buf, unsigned long delta_size, - unsigned long *src_copied, unsigned long *literal_added) -{ - unsigned long copied_from_source, added_literal; - const unsigned char *data, *top; - unsigned char cmd; - unsigned long src_size, dst_size, out; - - if (delta_size < DELTA_SIZE_MIN) - return -1; - - data = delta_buf; - top = delta_buf + delta_size; - - src_size = get_delta_hdr_size(&data); - dst_size = get_delta_hdr_size(&data); - - added_literal = copied_from_source = out = 0; - while (data < top) { - cmd = *data++; - if (cmd & 0x80) { - unsigned long cp_off = 0, cp_size = 0; - if (cmd & 0x01) cp_off = *data++; - if (cmd & 0x02) cp_off |= (*data++ << 8); - if (cmd & 0x04) cp_off |= (*data++ << 16); - if (cmd & 0x08) cp_off |= (*data++ << 24); - if (cmd & 0x10) cp_size = *data++; - if (cmd & 0x20) cp_size |= (*data++ << 8); - if (cmd & 0x40) cp_size |= (*data++ << 16); - if (cp_size == 0) cp_size = 0x10000; - - copied_from_source += cp_size; - out += cp_size; - } else { - /* write literal into dst */ - added_literal += cmd; - out += cmd; - data += cmd; - } - } - - /* sanity check */ - if (data != top || out != dst_size) - return -1; - - /* delete size is what was _not_ copied from source. - * edit size is that and literal additions. - */ - *src_copied = copied_from_source; - *literal_added = added_literal; - return 0; -} diff --git a/count-delta.h b/count-delta.h deleted file mode 100644 index 735962982..000000000 --- a/count-delta.h +++ /dev/null @@ -1,10 +0,0 @@ -/* - * Copyright (C) 2005 Junio C Hamano - */ -#ifndef COUNT_DELTA_H -#define COUNT_DELTA_H - -int count_delta(void *, unsigned long, - unsigned long *src_copied, unsigned long *literal_added); - -#endif -- 2.30.2