specifier.c revision 5430f7f2bc7330f3088b894166bf3524a067e3d8
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering/***
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering This file is part of systemd.
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering Copyright 2010 Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering systemd is free software; you can redistribute it and/or modify it
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering under the terms of the GNU Lesser General Public License as published by
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering the Free Software Foundation; either version 2.1 of the License, or
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering (at your option) any later version.
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering systemd is distributed in the hope that it will be useful, but
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering WITHOUT ANY WARRANTY; without even the implied warranty of
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering Lesser General Public License for more details.
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering You should have received a copy of the GNU Lesser General Public License
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering along with systemd; If not, see <http://www.gnu.org/licenses/>.
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering***/
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering#include <string.h>
4871690d9e32608bbd9b18505b5326c2079c9690Allin Cottrell
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering#include "macro.h"
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering#include "util.h"
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering#include "specifier.h"
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
d682b3a7e7c7c2941a4d3e193f1e330dbc9fae89Lennart Poettering/*
d025f1e4dca8fc1436aff76f9e6185fe3e728daaZbigniew Jędrzejewski-Szmek * Generic infrastructure for replacing %x style specifiers in
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering * strings. Will call a callback for each replacement.
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering *
3b7124a8db56ed57525b9ecfd19cfdc8c9facba0Lennart Poettering */
40b71e89bae4e51768db4dc50ec64c1e9c96eec4Sebastian Thorarensen
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poetteringchar *specifier_printf(const char *text, const Specifier table[], void *userdata) {
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering char *r, *t;
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering const char *f;
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering bool percent = false;
3b3154df7e2773332bb814e167187367a0ccae4aLennart Poettering size_t l;
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek
46b131574fdd7d77c15a0919ca9010cad7aa6ac7Lennart Poettering assert(text);
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek assert(table);
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek l = strlen(text);
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek if (!(r = new(char, l+1)))
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek return NULL;
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek
46b131574fdd7d77c15a0919ca9010cad7aa6ac7Lennart Poettering t = r;
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek
f8294e4175918117ca6c131720bcf287eadcd029Josh Triplett for (f = text; *f; f++, l--) {
b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering if (percent) {
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering if (*f == '%')
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering *(t++) = '%';
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering else {
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering const Specifier *i;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering for (i = table; i->specifier; i++)
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering if (i->specifier == *f)
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering break;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering if (i->lookup) {
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering char *n, *w;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering size_t k, j;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering if (!(w = i->lookup(i->specifier, i->data, userdata))) {
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering free(r);
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering return NULL;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering }
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering j = t - r;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering k = strlen(w);
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering if (!(n = new(char, j + k + l + 1))) {
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering free(r);
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering free(w);
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering return NULL;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering }
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering memcpy(n, r, j);
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering memcpy(n + j, w, k);
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering free(r);
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering free(w);
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering r = n;
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering t = n + j + k;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering } else {
ccf23ad5faf228d450d263d7291156a948b61af2Christian Seiler *(t++) = '%';
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering *(t++) = *f;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering }
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering }
ccf23ad5faf228d450d263d7291156a948b61af2Christian Seiler
ccf23ad5faf228d450d263d7291156a948b61af2Christian Seiler percent = false;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering } else if (*f == '%')
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering percent = true;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering else
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering *(t++) = *f;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering }
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering *t = 0;
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering return r;
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering}
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering/* Generic handler for simple string replacements */
178cc7700c23ac088cd7190d7854282075028d91Lennart Poettering
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poetteringchar* specifier_string(char specifier, void *data, void *userdata) {
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering return strdup(strempty(data));
35e2e347d38cc2f8bd7c38a0d8a5129f5fbb0ab9Lennart Poettering}
56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt