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author | Lorenz Meier <lm@inf.ethz.ch> | 2013-07-15 13:58:43 +0200 |
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committer | Lorenz Meier <lm@inf.ethz.ch> | 2013-07-15 13:58:43 +0200 |
commit | 0b47ed86e04bb1930507a74a745ea0b0259dc31f (patch) | |
tree | 6529ba57bddc4ad833562e1401e1465686e90817 /src/systemcmds | |
parent | 60ce9759d9d5a9b5f2e9fd218852fa595cc7bebd (diff) | |
download | px4-firmware-0b47ed86e04bb1930507a74a745ea0b0259dc31f.tar.gz px4-firmware-0b47ed86e04bb1930507a74a745ea0b0259dc31f.tar.bz2 px4-firmware-0b47ed86e04bb1930507a74a745ea0b0259dc31f.zip |
Implemented new, simple system boot config and sane default value system based on two parameters evaluated at boot time
Diffstat (limited to 'src/systemcmds')
-rw-r--r-- | src/systemcmds/param/param.c | 73 |
1 files changed, 72 insertions, 1 deletions
diff --git a/src/systemcmds/param/param.c b/src/systemcmds/param/param.c index 60e61d07b..c3fedb958 100644 --- a/src/systemcmds/param/param.c +++ b/src/systemcmds/param/param.c @@ -63,6 +63,7 @@ static void do_import(const char* param_file_name); static void do_show(const char* search_string); static void do_show_print(void *arg, param_t param); static void do_set(const char* name, const char* val); +static void do_compare(const char* name, const char* val); int param_main(int argc, char *argv[]) @@ -117,9 +118,17 @@ param_main(int argc, char *argv[]) errx(1, "not enough arguments.\nTry 'param set PARAM_NAME 3'"); } } + + if (!strcmp(argv[1], "compare")) { + if (argc >= 4) { + do_compare(argv[2], argv[3]); + } else { + errx(1, "not enough arguments.\nTry 'param compare PARAM_NAME 3'"); + } + } } - errx(1, "expected a command, try 'load', 'import', 'show', 'set', 'select' or 'save'"); + errx(1, "expected a command, try 'load', 'import', 'show', 'set', 'compare', 'select' or 'save'"); } static void @@ -295,3 +304,65 @@ do_set(const char* name, const char* val) exit(0); } + +static void +do_compare(const char* name, const char* val) +{ + int32_t i; + float f; + param_t param = param_find(name); + + /* set nothing if parameter cannot be found */ + if (param == PARAM_INVALID) { + /* param not found */ + errx(1, "Error: Parameter %s not found.", name); + } + + /* + * Set parameter if type is known and conversion from string to value turns out fine + */ + + int ret = 1; + + switch (param_type(param)) { + case PARAM_TYPE_INT32: + if (!param_get(param, &i)) { + printf("curr: %d: ", i); + + /* convert string */ + char* end; + int j = strtol(val,&end,10); + if (i == j) { + ret = 0; + } + + } + + break; + + case PARAM_TYPE_FLOAT: + if (!param_get(param, &f)) { + printf("curr: %4.4f: ", (double)f); + + /* convert string */ + char* end; + float g = strtod(val,&end); + if (fabsf(f - g) < 1e-7f) { + ret = 0; + } + } + + break; + + default: + errx(1, "<unknown / unsupported type %d>\n", 0 + param_type(param)); + } + + if (ret == 0) { + printf("%c %s: equal\n", + param_value_unsaved(param) ? '*' : (param_value_is_default(param) ? ' ' : '+'), + param_name(param)); + } + + exit(ret); +} |