From 307ab20b333d9b4c818b1ff912e86944d1a3fdc1 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Sun, 19 Feb 2012 15:36:55 -0800 Subject: xdiff: PATIENCE/HISTOGRAM are not independent option bits Because the default Myers, patience and histogram algorithms cannot be in effect at the same time, XDL_PATIENCE_DIFF and XDL_HISTOGRAM_DIFF are not independent bits. Instead of wasting one bit per algorithm, define a few macros to access the few bits they occupy and update the code that access them. Signed-off-by: Junio C Hamano --- xdiff/xdiff.h | 5 ++++- xdiff/xdiffi.c | 4 ++-- xdiff/xhistogram.c | 2 +- xdiff/xpatience.c | 2 +- xdiff/xprepare.c | 21 ++++++++++----------- 5 files changed, 18 insertions(+), 16 deletions(-) (limited to 'xdiff') diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h index 70c8b87ff2..09215afe6e 100644 --- a/xdiff/xdiff.h +++ b/xdiff/xdiff.h @@ -32,9 +32,12 @@ extern "C" { #define XDF_IGNORE_WHITESPACE (1 << 2) #define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3) #define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 4) +#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL) + #define XDF_PATIENCE_DIFF (1 << 5) #define XDF_HISTOGRAM_DIFF (1 << 6) -#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL) +#define XDF_DIFF_ALGORITHM_MASK (XDF_PATIENCE_DIFF | XDF_HISTOGRAM_DIFF) +#define XDF_DIFF_ALG(x) ((x) & XDF_DIFF_ALGORITHM_MASK) #define XDL_EMIT_FUNCNAMES (1 << 0) #define XDL_EMIT_COMMON (1 << 1) diff --git a/xdiff/xdiffi.c b/xdiff/xdiffi.c index 75a3922750..bc889e8789 100644 --- a/xdiff/xdiffi.c +++ b/xdiff/xdiffi.c @@ -328,10 +328,10 @@ int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdalgoenv_t xenv; diffdata_t dd1, dd2; - if (xpp->flags & XDF_PATIENCE_DIFF) + if (XDF_DIFF_ALG(xpp->flags) == XDF_PATIENCE_DIFF) return xdl_do_patience_diff(mf1, mf2, xpp, xe); - if (xpp->flags & XDF_HISTOGRAM_DIFF) + if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF) return xdl_do_histogram_diff(mf1, mf2, xpp, xe); if (xdl_prepare_env(mf1, mf2, xpp, xe) < 0) { diff --git a/xdiff/xhistogram.c b/xdiff/xhistogram.c index 18f6f997c3..bf99787c3e 100644 --- a/xdiff/xhistogram.c +++ b/xdiff/xhistogram.c @@ -252,7 +252,7 @@ static int fall_back_to_classic_diff(struct histindex *index, int line1, int count1, int line2, int count2) { xpparam_t xpp; - xpp.flags = index->xpp->flags & ~XDF_HISTOGRAM_DIFF; + xpp.flags = index->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK; return xdl_fall_back_diff(index->env, &xpp, line1, count1, line2, count2); diff --git a/xdiff/xpatience.c b/xdiff/xpatience.c index fdd7d0263f..04e1a1ab2a 100644 --- a/xdiff/xpatience.c +++ b/xdiff/xpatience.c @@ -288,7 +288,7 @@ static int fall_back_to_classic_diff(struct hashmap *map, int line1, int count1, int line2, int count2) { xpparam_t xpp; - xpp.flags = map->xpp->flags & ~XDF_PATIENCE_DIFF; + xpp.flags = map->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK; return xdl_fall_back_diff(map->env, &xpp, line1, count1, line2, count2); diff --git a/xdiff/xprepare.c b/xdiff/xprepare.c index e419f4f726..63a22c630e 100644 --- a/xdiff/xprepare.c +++ b/xdiff/xprepare.c @@ -181,7 +181,7 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_ if (!(recs = (xrecord_t **) xdl_malloc(narec * sizeof(xrecord_t *)))) goto abort; - if (xpp->flags & XDF_HISTOGRAM_DIFF) + if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF) hbits = hsize = 0; else { hbits = xdl_hashbits((unsigned int) narec); @@ -209,8 +209,8 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_ crec->ha = hav; recs[nrec++] = crec; - if (!(xpp->flags & XDF_HISTOGRAM_DIFF) && - xdl_classify_record(pass, cf, rhash, hbits, crec) < 0) + if ((XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) && + xdl_classify_record(pass, cf, rhash, hbits, crec) < 0) goto abort; } } @@ -273,16 +273,15 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, * (nrecs) will be updated correctly anyway by * xdl_prepare_ctx(). */ - sample = xpp->flags & XDF_HISTOGRAM_DIFF ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1; + sample = (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF + ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1); enl1 = xdl_guess_lines(mf1, sample) + 1; enl2 = xdl_guess_lines(mf2, sample) + 1; - if (!(xpp->flags & XDF_HISTOGRAM_DIFF) && - xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0) { - + if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF && + xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0) return -1; - } if (xdl_prepare_ctx(1, mf1, enl1, xpp, &cf, &xe->xdf1) < 0) { @@ -296,9 +295,9 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, return -1; } - if (!(xpp->flags & XDF_PATIENCE_DIFF) && - !(xpp->flags & XDF_HISTOGRAM_DIFF) && - xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) { + if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) && + (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) && + xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) { xdl_free_ctx(&xe->xdf2); xdl_free_ctx(&xe->xdf1); -- cgit v1.2.3