+++ /dev/null
-/*
- write.c : irssi configuration - write configuration file
-
- Copyright (C) 1999 Timo Sirainen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include "module.h"
-
-/* maximum length of lines in config file before splitting them to multiple lines */
-#define MAX_CHARS_IN_LINE 70
-
-#define CONFIG_INDENT_SIZE 2
-static const char *indent_block = " "; /* needs to be the same size as CONFIG_INDENT_SIZE! */
-
-/* write needed amount of indentation to the start of the line */
-static int config_write_indent(CONFIG_REC *rec)
-{
- int n;
-
- for (n = 0; n < rec->tmp_indent_level/CONFIG_INDENT_SIZE; n++) {
- if (write(rec->handle, indent_block, CONFIG_INDENT_SIZE) == -1)
- return -1;
- }
-
- return 0;
-}
-
-static int config_write_str(CONFIG_REC *rec, const char *str)
-{
- const char *strpos, *p;
-
- g_return_val_if_fail(rec != NULL, -1);
- g_return_val_if_fail(str != NULL, -1);
-
- strpos = str;
- while (*strpos != '\0') {
- /* fill the indentation */
- if (rec->tmp_last_lf && rec->tmp_indent_level > 0 &&
- *str != '\n') {
- if (config_write_indent(rec) == -1)
- return -1;
- }
-
- p = strchr(strpos, '\n');
- if (p == NULL) {
- if (write(rec->handle, strpos, strlen(strpos)) == -1)
- return -1;
- strpos = "";
- rec->tmp_last_lf = FALSE;
- } else {
- if (write(rec->handle, strpos, (int) (p-strpos)+1) == -1)
- return -1;
- strpos = p+1;
- rec->tmp_last_lf = TRUE;
- }
- }
-
- return 0;
-}
-
-static int config_has_specials(const char *text)
-{
- g_return_val_if_fail(text != NULL, FALSE);
-
- while (*text != '\0') {
- if (!i_isalnum(*text) && *text != '_')
- return TRUE;
- text++;
- }
-
- return FALSE;
-}
-
-static int get_octal(int decimal)
-{
- int octal, pos;
-
- octal = 0; pos = 0;
- while (decimal > 0) {
- octal += (decimal & 7)*(pos == 0 ? 1 : pos);
- decimal /= 8;
- pos += 10;
- }
-
- return octal;
-}
-
-static char *config_escape_string(const char *text)
-{
- GString *str;
- char *ret;
-
- g_return_val_if_fail(text != NULL, NULL);
-
- str = g_string_new("\"");
- while (*text != '\0') {
- if (*text == '\\' || *text == '"')
- g_string_sprintfa(str, "\\%c", *text);
- else if ((unsigned char) *text < 32)
- g_string_sprintfa(str, "\\%03d", get_octal(*text));
- else
- g_string_append_c(str, *text);
- text++;
- }
-
- g_string_append_c(str, '"');
-
- ret = str->str;
- g_string_free(str, FALSE);
- return ret;
-}
-
-static int config_write_word(CONFIG_REC *rec, const char *word, int string)
-{
- char *str;
- int ret;
-
- g_return_val_if_fail(rec != NULL, -1);
- g_return_val_if_fail(word != NULL, -1);
-
- if (!string && !config_has_specials(word))
- return config_write_str(rec, word);
-
- str = config_escape_string(word);
- ret = config_write_str(rec, str);
- g_free(str);
-
- return ret;
-}
-
-static int config_write_block(CONFIG_REC *rec, CONFIG_NODE *node, int list, int line_feeds);
-
-static int config_write_node(CONFIG_REC *rec, CONFIG_NODE *node, int line_feeds)
-{
- g_return_val_if_fail(rec != NULL, -1);
- g_return_val_if_fail(node != NULL, -1);
-
- switch (node->type) {
- case NODE_TYPE_KEY:
- if (config_write_word(rec, node->key, FALSE) == -1 ||
- config_write_str(rec, " = ") == -1 ||
- config_write_word(rec, node->value, TRUE) == -1)
- return -1;
- break;
- case NODE_TYPE_VALUE:
- if (config_write_word(rec, node->value, TRUE) == -1)
- return -1;
- break;
- case NODE_TYPE_BLOCK:
- /* key = { */
- if (node->key != NULL) {
- if (config_write_word(rec, node->key, FALSE) == -1 ||
- config_write_str(rec, " = ") == -1)
- return -1;
- }
- if (config_write_str(rec, line_feeds ? "{\n" : "{ ") == -1)
- return -1;
-
- /* ..block.. */
- rec->tmp_indent_level += CONFIG_INDENT_SIZE;
- if (config_write_block(rec, node, FALSE, line_feeds) == -1)
- return -1;
- rec->tmp_indent_level -= CONFIG_INDENT_SIZE;
-
- /* }; */
- if (config_write_str(rec, "}") == -1)
- return -1;
- break;
- case NODE_TYPE_LIST:
- /* key = ( */
- if (node->key != NULL) {
- if (config_write_word(rec, node->key, FALSE) == -1 ||
- config_write_str(rec, " = ") == -1)
- return -1;
- }
- if (config_write_str(rec, line_feeds ? "(\n" : "( ") == -1)
- return -1;
-
- /* ..list.. */
- rec->tmp_indent_level += CONFIG_INDENT_SIZE;
- if (config_write_block(rec, node, TRUE, line_feeds) == -1)
- return -1;
- rec->tmp_indent_level -= CONFIG_INDENT_SIZE;
-
- /* ); */
- if (config_write_str(rec, ")") == -1)
- return -1;
- break;
- case NODE_TYPE_COMMENT:
- if (node->value == NULL)
- break;
-
- if (config_write_str(rec, "#") == -1 ||
- config_write_str(rec, node->value) == -1)
- return -1;
- break;
- }
-
- return 0;
-}
-
-static int config_block_get_length(CONFIG_REC *rec, CONFIG_NODE *node);
-
-static int config_node_get_length(CONFIG_REC *rec, CONFIG_NODE *node)
-{
- int len;
-
- switch (node->type) {
- case NODE_TYPE_KEY:
- /* "key = value; " */
- len = 5 + strlen(node->key) + strlen(node->value);
- break;
- case NODE_TYPE_VALUE:
- /* "value, " */
- len = 2 + strlen(node->value);
- break;
- case NODE_TYPE_BLOCK:
- case NODE_TYPE_LIST:
- /* "{ list }; " */
- len = 6;
- if (node->key != NULL) len += strlen(node->key);
- len += config_block_get_length(rec, node);
- break;
- default:
- /* comments always split the line */
- len = 1000;
- break;
- }
-
- return len;
-}
-
-/* return the number of characters `node' and it's subnodes take
- if written to file */
-static int config_block_get_length(CONFIG_REC *rec, CONFIG_NODE *node)
-{
- GSList *tmp;
- int len;
-
- len = 0;
- for (tmp = node->value; tmp != NULL; tmp = tmp->next) {
- CONFIG_NODE *subnode = tmp->data;
-
- len += config_node_get_length(rec, subnode);
- if (len > MAX_CHARS_IN_LINE) return len;
- }
-
- return len;
-}
-
-/* check if `node' and it's subnodes fit in one line in the config file */
-static int config_block_fit_one_line(CONFIG_REC *rec, CONFIG_NODE *node)
-{
- g_return_val_if_fail(rec != NULL, 0);
- g_return_val_if_fail(node != NULL, 0);
-
- return rec->tmp_indent_level +
- config_node_get_length(rec, node) <= MAX_CHARS_IN_LINE;
-}
-
-static int config_write_block(CONFIG_REC *rec, CONFIG_NODE *node, int list, int line_feeds)
-{
- GSList *tmp;
- int list_line_feeds, node_line_feeds;
-
- g_return_val_if_fail(rec != NULL, -1);
- g_return_val_if_fail(node != NULL, -1);
- g_return_val_if_fail(is_node_list(node), -1);
-
- list_line_feeds = !config_block_fit_one_line(rec, node);
-
- if (!line_feeds && list_line_feeds)
- config_write_str(rec, "\n");
-
- for (tmp = node->value; tmp != NULL; tmp = tmp->next) {
- CONFIG_NODE *subnode = tmp->data;
-
- node_line_feeds = !line_feeds ? FALSE : !config_block_fit_one_line(rec, subnode);
- if (config_write_node(rec, subnode, node_line_feeds) == -1)
- return -1;
-
- if (subnode->type == NODE_TYPE_COMMENT)
- config_write_str(rec, "\n");
- else if (list) {
- if (tmp->next != NULL)
- config_write_str(rec, list_line_feeds ? ",\n" : ", ");
- else
- config_write_str(rec, list_line_feeds ? "\n" : " ");
- } else {
- config_write_str(rec, list_line_feeds ? ";\n" : "; ");
- }
- }
-
- return 0;
-}
-
-/* Write configuration file. Write to `fname' if it's not NULL. */
-int config_write(CONFIG_REC *rec, const char *fname, int create_mode)
-{
- int ret;
-
- g_return_val_if_fail(rec != NULL, -1);
- g_return_val_if_fail(fname != NULL || rec->fname != NULL, -1);
- g_return_val_if_fail(create_mode != -1 || rec->create_mode != -1, -1);
-
- if (rec->handle != -1)
- close(rec->handle);
-
- rec->handle = open(fname != NULL ? fname : rec->fname,
- O_WRONLY | O_TRUNC | O_CREAT,
- create_mode != -1 ? create_mode : rec->create_mode);
- if (rec->handle == -1)
- return config_error(rec, g_strerror(errno));
-
- rec->tmp_indent_level = 0;
- rec->tmp_last_lf = TRUE;
- ret = config_write_block(rec, rec->mainnode, FALSE, TRUE);
- if (ret == -1) {
- /* write error */
- config_error(rec, errno == 0 ? "bug" : g_strerror(errno));
- }
-
- close(rec->handle);
- rec->handle = -1;
-
- return ret;
-}
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