Module: kamailio Branch: master Commit: 17d8a04033a19d6781f8f14c9ae610cd070c2a47 URL: https://github.com/kamailio/kamailio/commit/17d8a04033a19d6781f8f14c9ae610c… Author: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Committer: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Date: 2023-04-14T11:53:02+02:00 math: additional logarithm functions --- Modified: src/modules/math/doc/math_admin.xml Modified: src/modules/math/math_mod.c --- Diff: https://github.com/kamailio/kamailio/commit/17d8a04033a19d6781f8f14c9ae610c… Patch: https://github.com/kamailio/kamailio/commit/17d8a04033a19d6781f8f14c9ae610c… --- diff --git a/src/modules/math/doc/math_admin.xml b/src/modules/math/doc/math_admin.xml index e0051824c6f..e3695fefbaf 100644 --- a/src/modules/math/doc/math_admin.xml +++ b/src/modules/math/doc/math_admin.xml @@ -80,7 +80,7 @@ </programlisting> </example> </section> -<section id="math.f.log"> + <section id="math.f.log"> <title> <function moreinfo="none">log(x, res)</function> </title> @@ -97,7 +97,51 @@ ... log("10", "$var(res)"); $var(x) = 10; - pow("$var(x)", "$var(res)"); + log("$var(x)", "$var(res)"); +... +</programlisting> + </example> + </section> + <section id="math.f.log2"> + <title> + <function moreinfo="none">log2(x, res)</function> + </title> + <para> + The function computes the base-2 logarithm of x and stores the result + in res. + </para> + <para> + This function can be used from ANY_ROUTE. + </para> + <example> + <title><function>log2</function> usage</title> + <programlisting format="linespecific"> +... + log2("16", "$var(res)"); + $var(x) = 16; + log2("$var(x)", "$var(res)"); +... +</programlisting> + </example> + </section> + <section id="math.f.log10"> + <title> + <function moreinfo="none">log10(x, res)</function> + </title> + <para> + The function computes the base-10 logarithm of x and stores the result + in res. + </para> + <para> + This function can be used from ANY_ROUTE. + </para> + <example> + <title><function>log10</function> usage</title> + <programlisting format="linespecific"> +... + log10("100", "$var(res)"); + $var(x) = 100; + log10("$var(x)", "$var(res)"); ... </programlisting> </example> diff --git a/src/modules/math/math_mod.c b/src/modules/math/math_mod.c index 6f2b2f17ec4..314bb23e9a5 100644 --- a/src/modules/math/math_mod.c +++ b/src/modules/math/math_mod.c @@ -37,6 +37,8 @@ MODULE_VERSION static int w_math_pow(sip_msg_t *msg, char *v1, char *v2, char *r); static int w_math_log(sip_msg_t *msg, char *v1, char *r); +static int w_math_log2(sip_msg_t *msg, char *v1, char *r); +static int w_math_log10(sip_msg_t *msg, char *v1, char *r); static int fixup_math_p2(void **param, int param_no); static int fixup_math_p3(void **param, int param_no); @@ -47,6 +49,10 @@ static cmd_export_t cmds[]={ 0, ANY_ROUTE}, {"math_log", (cmd_function)w_math_log, 2, fixup_math_p2, 0, ANY_ROUTE}, + {"math_log2", (cmd_function)w_math_log2, 2, fixup_math_p2, + 0, ANY_ROUTE}, + {"math_log10", (cmd_function)w_math_log10, 2, fixup_math_p2, + 0, ANY_ROUTE}, {0, 0, 0, 0, 0, 0} }; @@ -127,6 +133,62 @@ static int w_math_log(sip_msg_t *msg, char *v1, char *r) return 1; } +/** + * + */ +static int w_math_log2(sip_msg_t *msg, char *v1, char *r) +{ + int vi1 = 0; + pv_spec_t *dst; + pv_value_t val = {0}; + + if(fixup_get_ivalue(msg, (gparam_t*)v1, &vi1)<0) { + LM_ERR("failed to get first parameter value\n"); + return -1; + } + + dst = (pv_spec_t *)r; + if(dst->setf==NULL) { + LM_ERR("target pv is not writable\n"); + return -1; + } + + val.ri = (long)log2((double)vi1); + val.flags = PV_TYPE_INT|PV_VAL_INT; + + dst->setf(msg, &dst->pvp, (int)EQ_T, &val); + + return 1; +} + +/** + * + */ +static int w_math_log10(sip_msg_t *msg, char *v1, char *r) +{ + int vi1 = 0; + pv_spec_t *dst; + pv_value_t val = {0}; + + if(fixup_get_ivalue(msg, (gparam_t*)v1, &vi1)<0) { + LM_ERR("failed to get first parameter value\n"); + return -1; + } + + dst = (pv_spec_t *)r; + if(dst->setf==NULL) { + LM_ERR("target pv is not writable\n"); + return -1; + } + + val.ri = (long)log10((double)vi1); + val.flags = PV_TYPE_INT|PV_VAL_INT; + + dst->setf(msg, &dst->pvp, (int)EQ_T, &val); + + return 1; +} + /** * */