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author | Arnaud Lacombe <lacombar@gmail.com> | 2010-08-18 07:23:50 +0200 |
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committer | Arnaud Lacombe <lacombar@gmail.com> | 2010-09-20 00:19:48 +0200 |
commit | 76a540958af5390a94b7f68c46cb7f2aed34ccf1 (patch) | |
tree | 19c6fd1e22ff5fac8785b5fb2779ace0c7d3d0c1 /scripts/kconfig | |
parent | kconfig: regen parser (diff) | |
download | linux-76a540958af5390a94b7f68c46cb7f2aed34ccf1.tar.xz linux-76a540958af5390a94b7f68c46cb7f2aed34ccf1.zip |
kconfig: add a symbol string expansion helper
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/kconfig')
-rw-r--r-- | scripts/kconfig/lkc_proto.h | 1 | ||||
-rw-r--r-- | scripts/kconfig/symbol.c | 49 |
2 files changed, 50 insertions, 0 deletions
diff --git a/scripts/kconfig/lkc_proto.h b/scripts/kconfig/lkc_proto.h index 9a948c9ce44e..4531badb3fe1 100644 --- a/scripts/kconfig/lkc_proto.h +++ b/scripts/kconfig/lkc_proto.h @@ -28,6 +28,7 @@ P(symbol_hash,struct symbol *,[SYMBOL_HASHSIZE]); P(sym_lookup,struct symbol *,(const char *name, int flags)); P(sym_find,struct symbol *,(const char *name)); +P(sym_expand_string_value,const char *,(const char *in)); P(sym_re_search,struct symbol **,(const char *pattern)); P(sym_type_name,const char *,(enum symbol_type type)); P(sym_calc_value,void,(struct symbol *sym)); diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c index 943712ca6c0a..dc5dcf2189a0 100644 --- a/scripts/kconfig/symbol.c +++ b/scripts/kconfig/symbol.c @@ -840,6 +840,55 @@ struct symbol *sym_find(const char *name) return symbol; } +/* + * Expand symbol's names embedded in the string given in argument. Symbols' + * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to + * the empty string. + */ +const char *sym_expand_string_value(const char *in) +{ + const char *src; + char *res; + size_t reslen; + + reslen = strlen(in) + 1; + res = malloc(reslen); + res[0] = '\0'; + + while ((src = strchr(in, '$'))) { + char *p, name[SYMBOL_MAXLENGTH]; + const char *symval = ""; + struct symbol *sym; + size_t newlen; + + strncat(res, in, src - in); + src++; + + p = name; + while (isalnum(*src) || *src == '_') + *p++ = *src++; + *p = '\0'; + + sym = sym_find(name); + if (sym != NULL) { + sym_calc_value(sym); + symval = sym_get_string_value(sym); + } + + newlen = strlen(res) + strlen(symval) + strlen(src); + if (newlen > reslen) { + reslen = newlen; + realloc(res, reslen); + } + + strcat(res, symval); + in = src; + } + strcat(res, in); + + return res; +} + struct symbol **sym_re_search(const char *pattern) { struct symbol *sym, **sym_arr = NULL; |