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color: add color_set helper for copying raw colors 

To set up default colors, we sometimes strcpy() from the
default string literals into our color buffers. This isn't a
bug (assuming the destination is COLOR_MAXLEN bytes), but
makes it harder to audit the code for problematic strcpy
calls.

Let's introduce a color_set which copies under the
assumption that there are COLOR_MAXLEN bytes in the
destination (of course you can call it on a smaller buffer,
so this isn't providing a huge amount of safety, but it's
more convenient than calling xsnprintf yourself).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2015-09-24 17:08:21 -04:00 committed by Junio C Hamano
parent 34fa79a6cd
commit 7ce4fb948c
3 changed files with 28 additions and 16 deletions
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5
color.c
View File

@ -145,6 +145,11 @@ int color_parse(const char *value, char *dst)
return color_parse_mem(value, strlen(value), dst);
}
void color_set(char *dst, const char *color_bytes)
{
xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes);
}
/*
* Write the ANSI color codes for "c" to "out"; the string should
* already have the ANSI escape code in it. "out" should have enough

7
color.h
View File

@ -75,6 +75,13 @@ extern int color_stdout_is_tty;
int git_color_config(const char *var, const char *value, void *cb);
int git_color_default_config(const char *var, const char *value, void *cb);
/*
* Set the color buffer (which must be COLOR_MAXLEN bytes)
* to the raw color bytes; this is useful for initializing
* default color variables.
*/
void color_set(char *dst, const char *color_bytes);
int git_config_colorbool(const char *var, const char *value);
int want_color(int var);
int color_parse(const char *value, char *dst);

32
grep.c
View File

@ -31,14 +31,14 @@ void init_grep_defaults(void)
opt->max_depth = -1;
opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
opt->extended_regexp_option = 0;
strcpy(opt->color_context, "");
strcpy(opt->color_filename, "");
strcpy(opt->color_function, "");
strcpy(opt->color_lineno, "");
strcpy(opt->color_match_context, GIT_COLOR_BOLD_RED);
strcpy(opt->color_match_selected, GIT_COLOR_BOLD_RED);
strcpy(opt->color_selected, "");
strcpy(opt->color_sep, GIT_COLOR_CYAN);
color_set(opt->color_context, "");
color_set(opt->color_filename, "");
color_set(opt->color_function, "");
color_set(opt->color_lineno, "");
color_set(opt->color_match_context, GIT_COLOR_BOLD_RED);
color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED);
color_set(opt->color_selected, "");
color_set(opt->color_sep, GIT_COLOR_CYAN);
opt->color = -1;
}
@ -151,14 +151,14 @@ void grep_init(struct grep_opt *opt, const char *prefix)
opt->regflags = def->regflags;
opt->relative = def->relative;
strcpy(opt->color_context, def->color_context);
strcpy(opt->color_filename, def->color_filename);
strcpy(opt->color_function, def->color_function);
strcpy(opt->color_lineno, def->color_lineno);
strcpy(opt->color_match_context, def->color_match_context);
strcpy(opt->color_match_selected, def->color_match_selected);
strcpy(opt->color_selected, def->color_selected);
strcpy(opt->color_sep, def->color_sep);
color_set(opt->color_context, def->color_context);
color_set(opt->color_filename, def->color_filename);
color_set(opt->color_function, def->color_function);
color_set(opt->color_lineno, def->color_lineno);
color_set(opt->color_match_context, def->color_match_context);
color_set(opt->color_match_selected, def->color_match_selected);
color_set(opt->color_selected, def->color_selected);
color_set(opt->color_sep, def->color_sep);
}
void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)