From patchwork Fri Oct 14 16:48:27 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [U-Boot, v2, 01/10] Add getenv_ulong() to read an integer from an environment variable From: Simon Glass X-Patchwork-Id: 119856 Message-Id: <1318610916-6975-2-git-send-email-sjg@chromium.org> To: U-Boot Mailing List Date: Fri, 14 Oct 2011 09:48:27 -0700 This is not an uncommon operation in U-Boot, so let's put it in a common function. Signed-off-by: Simon Glass Acked-by: Mike Frysinger --- Changes in v2: - Fix commit title from getenv_int() to getenv_ulong() common/cmd_nvedit.c | 7 +++++++ include/common.h | 12 ++++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c index 101bc49..337ae9a 100644 --- a/common/cmd_nvedit.c +++ b/common/cmd_nvedit.c @@ -540,6 +540,13 @@ int getenv_f(const char *name, char *buf, unsigned len) return -1; } +ulong getenv_ulong(const char *name, int base, ulong default_val) +{ + const char *str = getenv(name); + + return str ? simple_strtoul(str, NULL, base) : default_val; +} + #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) diff --git a/include/common.h b/include/common.h index eb19a44..c2796e2 100644 --- a/include/common.h +++ b/include/common.h @@ -288,6 +288,18 @@ void env_relocate (void); int envmatch (uchar *, int); char *getenv (const char *); int getenv_f (const char *name, char *buf, unsigned len); + +/** + * Decode the value of an environment variable and return it. + * + * @param name Name of environemnt variable + * @param base Number base to use (normally 10, or 16 for hex) + * @param default_val Default value to return if the variable is not + * found + * @return the decoded value, or default_val if not found + */ +ulong getenv_ulong(const char *name, int base, ulong default_val); + int saveenv (void); #ifdef CONFIG_PPC /* ARM version to be fixed! */ int inline setenv (const char *, const char *);