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2 nishi 1 
/* $Id: ircfw.c 2 2024-09-09 13:22:05Z nishi $ */
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#define IRCFW_SRC
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#include "ircfw.h"
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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struct ircfw_message ircfw_message;
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char* ircfw_strcat(const char* a, const char* b) {
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	char* str = malloc(strlen(a) + strlen(b) + 1);
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	memcpy(str, a, strlen(a));
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	memcpy(str + strlen(a), b, strlen(b));
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	str[strlen(a) + strlen(b)] = 0;
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	return str;
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}
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char* ircfw_strcat3(const char* a, const char* b, const char* c) {
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	char* tmp = ircfw_strcat(a, b);
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	char* str = ircfw_strcat(tmp, c);
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	free(tmp);
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	return str;
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}
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char* ircfw_strdup(const char* str) { return ircfw_strcat(str, ""); }
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void ircfw_init(void) {
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	ircfw_message.prefix = NULL;
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	ircfw_message.params = NULL;
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	ircfw_message.command = NULL;
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}
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void ircfw_parse_params(const char* str) {
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	ircfw_message.params = malloc(sizeof(*ircfw_message.params));
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	ircfw_message.params[0] = NULL;
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	int i;
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	int incr = 0;
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	bool until_end = false;
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	char* dup = ircfw_strdup(str);
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	for(i = 0;; i++) {
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		if(dup[i] == 0 || (!until_end && dup[i] == ' ')) {
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			char oldc = dup[i];
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			dup[i] = 0;
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			char* param = ircfw_strdup(dup + incr);
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			char** old_params = ircfw_message.params;
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			int j;
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			for(j = 0; old_params[j] != NULL; j++)
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				;
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			ircfw_message.params = malloc(sizeof(*ircfw_message.params) * (2 + j));
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			for(j = 0; old_params[j] != NULL; j++) {
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				ircfw_message.params[j] = old_params[j];
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			}
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			ircfw_message.params[j] = param;
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			ircfw_message.params[j + 1] = NULL;
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			free(old_params);
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			incr = i + 1;
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			if(oldc == 0) break;
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		} else if(dup[i] == ':' && !until_end) {
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			until_end = true;
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			incr = i + 1;
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		}
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	}
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	free(dup);
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}
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int ircfw_socket_send_cmd(int sock, const char* name, const char* cmd) {
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	char* str = ircfw_strcat(cmd, "\r\n");
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	if(name != NULL) {
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		char* old = str;
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		char* tmp = ircfw_strcat3(":", name, " ");
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		str = ircfw_strcat(tmp, old);
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		free(old);
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		free(tmp);
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	}
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	int st = send(sock, str, strlen(str), 0);
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	free(str);
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	return st < 0 ? 1 : 0;
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}
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int ircfw_socket_read_cmd(int sock) {
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	char c[2];
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	c[1] = 0;
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	char* str = malloc(1);
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	str[0] = 0;
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	bool err = false;
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	bool end = false;
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	while(1) {
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		int s = recv(sock, c, 1, 0);
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		if(s <= 0) {
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			err = true;
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			break;
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		}
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		if(c[0] == '\n') {
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			end = true;
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			break;
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		} else if(c[0] != '\r') {
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			char* tmp = str;
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			str = ircfw_strcat(tmp, c);
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			free(tmp);
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		}
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	}
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	if(ircfw_message.prefix != NULL) free(ircfw_message.prefix);
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	if(ircfw_message.params != NULL) {
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		int i;
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		for(i = 0; ircfw_message.params[i] != NULL; i++) {
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			free(ircfw_message.params[i]);
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		}
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		free(ircfw_message.params);
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	}
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	if(ircfw_message.command != NULL) free(ircfw_message.command);
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	ircfw_message.prefix = NULL;
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	ircfw_message.params = NULL;
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	ircfw_message.command = NULL;
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	if(str[0] == ':') {
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		int i;
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		for(i = 0; str[i] != 0; i++) {
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			if(str[i] == ' ') {
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				str[i] = 0;
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				ircfw_message.prefix = ircfw_strdup(str + 1);
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				i++;
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				int start = i;
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				for(;; i++) {
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					if(str[i] == ' ' || str[i] == 0) {
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						char oldc = str[i];
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						str[i] = 0;
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						ircfw_message.command = ircfw_strdup(str + start);
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						if(oldc != 0) {
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							i++;
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							ircfw_parse_params(str + i);
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						}
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						break;
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					}
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				}
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				break;
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			}
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		}
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	} else {
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		int i;
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		for(i = 0; str[i] != 0; i++) {
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			if(str[i] == ' ' || str[i] == 0) {
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				char oldc = str[i];
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				str[i] = 0;
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				ircfw_message.command = ircfw_strdup(str);
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				if(oldc != 0) {
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					i++;
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					ircfw_parse_params(str + i);
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				}
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				break;
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			}
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		}
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	}
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	free(str);
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	return err ? 1 : 0;
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}