diff options
Diffstat (limited to 'xdiff')
| -rw-r--r-- | xdiff/xdiff.h | 1 | ||||
| -rw-r--r-- | xdiff/xemit.c | 85 |
2 files changed, 70 insertions, 16 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; /* |