diff options
Diffstat (limited to 'xdiff')
| -rw-r--r-- | xdiff/xdiff.h | 1 | ||||
| -rw-r--r-- | xdiff/xemit.c | 85 | ||||
| -rw-r--r-- | xdiff/xprepare.c | 10 |
3 files changed, 77 insertions, 19 deletions
diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h index 4beb10c678..00d36c3ac7 100644 --- a/xdiff/xdiff.h +++ b/xdiff/xdiff.h @@ -43,6 +43,7 @@ extern "C" { #define XDL_EMIT_FUNCNAMES (1 << 0) #define XDL_EMIT_COMMON (1 << 1) +#define XDL_EMIT_FUNCCONTEXT (1 << 2) #define XDL_MMB_READONLY (1 << 0) diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 277e2eec5b..2e669c3e25 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -100,14 +100,40 @@ static int xdl_emit_common(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, return 0; } +struct func_line { + long len; + char buf[80]; +}; + +static long get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg, + struct func_line *func_line, long start, long limit) +{ + find_func_t ff = xecfg->find_func ? xecfg->find_func : def_ff; + long l, size, step = (start > limit) ? -1 : 1; + char *buf, dummy[1]; + + buf = func_line ? func_line->buf : dummy; + size = func_line ? sizeof(func_line->buf) : sizeof(dummy); + + for (l = start; l != limit && 0 <= l && l < xe->xdf1.nrec; l += step) { + const char *rec; + long reclen = xdl_get_rec(&xe->xdf1, l, &rec); + long len = ff(rec, reclen, buf, size, xecfg->find_func_priv); + if (len >= 0) { + if (func_line) + func_line->len = len; + return l; + } + } + return -1; +} + int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, xdemitconf_t const *xecfg) { long s1, s2, e1, e2, lctx; xdchange_t *xch, *xche; - char funcbuf[80]; - long funclen = 0; long funclineprev = -1; - find_func_t ff = xecfg->find_func ? xecfg->find_func : def_ff; + struct func_line func_line = { 0 }; if (xecfg->flags & XDL_EMIT_COMMON) return xdl_emit_common(xe, xscr, ecb, xecfg); @@ -118,6 +144,17 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0); s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0); + if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) { + long fs1 = get_func_line(xe, xecfg, NULL, xch->i1, -1); + if (fs1 < 0) + fs1 = 0; + if (fs1 < s1) { + s2 -= s1 - fs1; + s1 = fs1; + } + } + + again: lctx = xecfg->ctxlen; lctx = XDL_MIN(lctx, xe->xdf1.nrec - (xche->i1 + xche->chg1)); lctx = XDL_MIN(lctx, xe->xdf2.nrec - (xche->i2 + xche->chg2)); @@ -125,27 +162,43 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, e1 = xche->i1 + xche->chg1 + lctx; e2 = xche->i2 + xche->chg2 + lctx; + if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) { + long fe1 = get_func_line(xe, xecfg, NULL, + xche->i1 + xche->chg1, + xe->xdf1.nrec); + if (fe1 < 0) + fe1 = xe->xdf1.nrec; + if (fe1 > e1) { + e2 += fe1 - e1; + e1 = fe1; + } + + /* + * Overlap with next change? Then include it + * in the current hunk and start over to find + * its new end. + */ + if (xche->next) { + long l = xche->next->i1; + if (l <= e1 || + get_func_line(xe, xecfg, NULL, l, e1) < 0) { + xche = xche->next; + goto again; + } + } + } + /* * Emit current hunk header. */ if (xecfg->flags & XDL_EMIT_FUNCNAMES) { - long l; - for (l = s1 - 1; l >= 0 && l > funclineprev; l--) { - const char *rec; - long reclen = xdl_get_rec(&xe->xdf1, l, &rec); - long newfunclen = ff(rec, reclen, funcbuf, - sizeof(funcbuf), - xecfg->find_func_priv); - if (newfunclen >= 0) { - funclen = newfunclen; - break; - } - } + get_func_line(xe, xecfg, &func_line, + s1 - 1, funclineprev); funclineprev = s1 - 1; } if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2, - funcbuf, funclen, ecb) < 0) + func_line.buf, func_line.len, ecb) < 0) return -1; /* diff --git a/xdiff/xprepare.c b/xdiff/xprepare.c index 5a33d1a869..e419f4f726 100644 --- a/xdiff/xprepare.c +++ b/xdiff/xprepare.c @@ -383,7 +383,7 @@ static int xdl_clean_mmatch(char const *dis, long i, long s, long e) { * might be potentially discarded if they happear in a run of discardable. */ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) { - long i, nm, nreff; + long i, nm, nreff, mlim; xrecord_t **recs; xdlclass_t *rcrec; char *dis, *dis1, *dis2; @@ -396,16 +396,20 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd dis1 = dis; dis2 = dis1 + xdf1->nrec + 1; + if ((mlim = xdl_bogosqrt(xdf1->nrec)) > XDL_MAX_EQLIMIT) + mlim = XDL_MAX_EQLIMIT; for (i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; i <= xdf1->dend; i++, recs++) { rcrec = cf->rcrecs[(*recs)->ha]; nm = rcrec ? rcrec->len2 : 0; - dis1[i] = (nm == 0) ? 0: 1; + dis1[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1; } + if ((mlim = xdl_bogosqrt(xdf2->nrec)) > XDL_MAX_EQLIMIT) + mlim = XDL_MAX_EQLIMIT; for (i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart]; i <= xdf2->dend; i++, recs++) { rcrec = cf->rcrecs[(*recs)->ha]; nm = rcrec ? rcrec->len1 : 0; - dis2[i] = (nm == 0) ? 0: 1; + dis2[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1; } for (nreff = 0, i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; |