From 64acde94efd2906c3e20560c31c2957ac0b242c4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= Date: Sun, 14 Jul 2013 15:35:25 +0700 Subject: move struct pathspec and related functions to pathspec.[ch] MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano --- pathspec.c | 150 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 150 insertions(+) (limited to 'pathspec.c') diff --git a/pathspec.c b/pathspec.c index 284f3970a3..133f8be98c 100644 --- a/pathspec.c +++ b/pathspec.c @@ -99,3 +99,153 @@ void die_if_path_beyond_symlink(const char *path, const char *prefix) die(_("'%s' is beyond a symbolic link"), path + len); } } + +/* + * Magic pathspec + * + * NEEDSWORK: These need to be moved to dir.h or even to a new + * pathspec.h when we restructure get_pathspec() users to use the + * "struct pathspec" interface. + * + * Possible future magic semantics include stuff like: + * + * { PATHSPEC_NOGLOB, '!', "noglob" }, + * { PATHSPEC_ICASE, '\0', "icase" }, + * { PATHSPEC_RECURSIVE, '*', "recursive" }, + * { PATHSPEC_REGEXP, '\0', "regexp" }, + * + */ +#define PATHSPEC_FROMTOP (1<<0) + +static struct pathspec_magic { + unsigned bit; + char mnemonic; /* this cannot be ':'! */ + const char *name; +} pathspec_magic[] = { + { PATHSPEC_FROMTOP, '/', "top" }, +}; + +/* + * Take an element of a pathspec and check for magic signatures. + * Append the result to the prefix. + * + * For now, we only parse the syntax and throw out anything other than + * "top" magic. + * + * NEEDSWORK: This needs to be rewritten when we start migrating + * get_pathspec() users to use the "struct pathspec" interface. For + * example, a pathspec element may be marked as case-insensitive, but + * the prefix part must always match literally, and a single stupid + * string cannot express such a case. + */ +static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt) +{ + unsigned magic = 0; + const char *copyfrom = elt; + int i; + + if (elt[0] != ':') { + ; /* nothing to do */ + } else if (elt[1] == '(') { + /* longhand */ + const char *nextat; + for (copyfrom = elt + 2; + *copyfrom && *copyfrom != ')'; + copyfrom = nextat) { + size_t len = strcspn(copyfrom, ",)"); + if (copyfrom[len] == ',') + nextat = copyfrom + len + 1; + else + /* handle ')' and '\0' */ + nextat = copyfrom + len; + if (!len) + continue; + for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) + if (strlen(pathspec_magic[i].name) == len && + !strncmp(pathspec_magic[i].name, copyfrom, len)) { + magic |= pathspec_magic[i].bit; + break; + } + if (ARRAY_SIZE(pathspec_magic) <= i) + die("Invalid pathspec magic '%.*s' in '%s'", + (int) len, copyfrom, elt); + } + if (*copyfrom != ')') + die("Missing ')' at the end of pathspec magic in '%s'", elt); + copyfrom++; + } else { + /* shorthand */ + for (copyfrom = elt + 1; + *copyfrom && *copyfrom != ':'; + copyfrom++) { + char ch = *copyfrom; + + if (!is_pathspec_magic(ch)) + break; + for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) + if (pathspec_magic[i].mnemonic == ch) { + magic |= pathspec_magic[i].bit; + break; + } + if (ARRAY_SIZE(pathspec_magic) <= i) + die("Unimplemented pathspec magic '%c' in '%s'", + ch, elt); + } + if (*copyfrom == ':') + copyfrom++; + } + + if (magic & PATHSPEC_FROMTOP) + return xstrdup(copyfrom); + else + return prefix_path(prefix, prefixlen, copyfrom); +} + +/* + * N.B. get_pathspec() is deprecated in favor of the "struct pathspec" + * based interface - see pathspec_magic above. + * + * Arguments: + * - prefix - a path relative to the root of the working tree + * - pathspec - a list of paths underneath the prefix path + * + * Iterates over pathspec, prepending each path with prefix, + * and return the resulting list. + * + * If pathspec is empty, return a singleton list containing prefix. + * + * If pathspec and prefix are both empty, return an empty list. + * + * This is typically used by built-in commands such as add.c, in order + * to normalize argv arguments provided to the built-in into a list of + * paths to process, all relative to the root of the working tree. + */ +const char **get_pathspec(const char *prefix, const char **pathspec) +{ + const char *entry = *pathspec; + const char **src, **dst; + int prefixlen; + + if (!prefix && !entry) + return NULL; + + if (!entry) { + static const char *spec[2]; + spec[0] = prefix; + spec[1] = NULL; + return spec; + } + + /* Otherwise we have to re-write the entries.. */ + src = pathspec; + dst = pathspec; + prefixlen = prefix ? strlen(prefix) : 0; + while (*src) { + *(dst++) = prefix_pathspec(prefix, prefixlen, *src); + src++; + } + *dst = NULL; + if (!*pathspec) + return NULL; + return pathspec; +} -- cgit v1.2.3