diff options
| -rw-r--r-- | Documentation/diff-options.txt | 4 | ||||
| -rw-r--r-- | diff.c | 8 | ||||
| -rw-r--r-- | diff.h | 1 | ||||
| -rw-r--r-- | t/t4051-diff-function-context.sh | 92 | ||||
| -rw-r--r-- | xdiff/xdiff.h | 1 | ||||
| -rw-r--r-- | xdiff/xemit.c | 54 |
6 files changed, 154 insertions, 6 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index b620b3afec..1ce4ae3b17 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -404,6 +404,10 @@ endif::git-format-patch[] Show the context between diff hunks, up to the specified number of lines, thereby fusing hunks that are close to each other. +-W:: +--function-context:: + Show whole surrounding functions of changes. + ifndef::git-format-patch[] --exit-code:: Make the program exit with codes similar to diff(1). @@ -2169,6 +2169,8 @@ static void builtin_diff(const char *name_a, xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; xecfg.flags = XDL_EMIT_FUNCNAMES; + if (DIFF_OPT_TST(o, FUNCCONTEXT)) + xecfg.flags |= XDL_EMIT_FUNCCONTEXT; if (pe) xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); if (!diffopts) @@ -3530,6 +3532,12 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) else if (opt_arg(arg, '\0', "inter-hunk-context", &options->interhunkcontext)) ; + else if (!strcmp(arg, "-W")) + DIFF_OPT_SET(options, FUNCCONTEXT); + else if (!strcmp(arg, "--function-context")) + DIFF_OPT_SET(options, FUNCCONTEXT); + else if (!strcmp(arg, "--no-function-context")) + DIFF_OPT_CLR(options, FUNCCONTEXT); else if ((argcount = parse_long_opt("output", av, &optarg))) { options->file = fopen(optarg, "w"); if (!options->file) @@ -79,6 +79,7 @@ typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data) #define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26) #define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27) #define DIFF_OPT_DIRSTAT_BY_LINE (1 << 28) +#define DIFF_OPT_FUNCCONTEXT (1 << 29) #define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag) #define DIFF_OPT_SET(opts, flag) ((opts)->flags |= DIFF_OPT_##flag) diff --git a/t/t4051-diff-function-context.sh b/t/t4051-diff-function-context.sh new file mode 100644 index 0000000000..001d678e09 --- /dev/null +++ b/t/t4051-diff-function-context.sh @@ -0,0 +1,92 @@ +#!/bin/sh + +test_description='diff function context' + +. ./test-lib.sh +. "$TEST_DIRECTORY"/diff-lib.sh + + +cat <<\EOF >hello.c +#include <stdio.h> + +static int a(void) +{ + /* + * Dummy. + */ +} + +static int hello_world(void) +{ + /* Classic. */ + printf("Hello world.\n"); + + /* Success! */ + return 0; +} +static int b(void) +{ + /* + * Dummy, too. + */ +} + +int main(int argc, char **argv) +{ + a(); + b(); + return hello_world(); +} +EOF + +test_expect_success 'setup' ' + git add hello.c && + test_tick && + git commit -m initial && + + grep -v Classic <hello.c >hello.c.new && + mv hello.c.new hello.c +' + +cat <<\EOF >expected +diff --git a/hello.c b/hello.c +--- a/hello.c ++++ b/hello.c +@@ -10,8 +10,7 @@ static int a(void) + static int hello_world(void) + { +- /* Classic. */ + printf("Hello world.\n"); + + /* Success! */ + return 0; + } +EOF + +test_expect_success 'diff -U0 -W' ' + git diff -U0 -W >actual && + compare_diff_patch actual expected +' + +cat <<\EOF >expected +diff --git a/hello.c b/hello.c +--- a/hello.c ++++ b/hello.c +@@ -9,9 +9,8 @@ static int a(void) + + static int hello_world(void) + { +- /* Classic. */ + printf("Hello world.\n"); + + /* Success! */ + return 0; + } +EOF + +test_expect_success 'diff -W' ' + git diff -W >actual && + compare_diff_patch actual expected +' + +test_done 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 64eb17a463..2e669c3e25 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -105,22 +105,27 @@ struct func_line { char buf[80]; }; -static void get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg, +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 = sizeof(func_line->buf); - char *buf = func_line->buf; + long l, size, step = (start > limit) ? -1 : 1; + char *buf, dummy[1]; - for (l = start; l > limit && 0 <= l; l--) { + 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) { - func_line->len = len; - break; + if (func_line) + func_line->len = len; + return l; } } + return -1; } int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, @@ -139,6 +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)); @@ -146,6 +162,32 @@ 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. */ |