diff options
Diffstat (limited to 'libline.c')
| -rw-r--r-- | libline.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/libline.c b/libline.c new file mode 100644 index 0000000..f07d049 --- /dev/null +++ b/libline.c @@ -0,0 +1,229 @@ +//what data type to use for storing all of the shit? +//hashtable with hash == fd? + +//should I use FILE *, or fd, or write functions for both? + +#define _GNU_SOURCE //I want memmem out of string.h +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <stdio.h> +#include <errno.h> + +//#define CHUNK 4096 +#include "line.h" + +#define TSIZE 65536 + +/* might not put this function in here... or maybe I will, but not use it. +char *read_line_hack(FILE *fp,int len) { + short in; + char *t; + errno=0; + switch(in=fgetc(fp)) { + case '\n': + t=malloc(len+1); + t[len]=0; + return t; + case -1: + if(errno == EAGAIN) return 0; + if(feof(fp)) { + fprintf(stderr,"# reached EOF. exiting.\n"); + exit(0); + } + fprintf(stderr,"# some other error happened while reading. %d %d\n",EAGAIN,errno); + perror("hackvr"); + exit(1); + default: //we need to check the last strlen(delim) bytes for delim to indicate end of line-read. + if((t=read_line_hack(fp,len+1))) t[len]=in; + break; + } + return t; +} +*/ + + +/* in line.h +struct shit { + //I need to choose which of these two. + //FILE *fp; + int fd; + char *backlog; + int blsize; + int bllen; + char buffer[CHUNK];//THIS IS *NOT* NULL TERMINATED. + + char *delim; + //other stuffs? +// union { + void (*line_handler)(struct shit *me,char *line);//function pointer to the handler. ??? +// (void *line_handler_fd)(int fd,char *) +// };//??? + void *extra_info;//extra info that I don't care to name atm +}; +*/ + +struct global libline; + +int update_shits() { + //loop over all shits and find the maxfd + int i; + for(i=0;i < libline.shitlen;i++) { + libline.fdmax = libline.fds[i].fd>libline.fdmax ? libline.fds[i].fd : libline.fdmax; + } + return 0; +} + +int add_fd(int fd,void (*line_handler)(struct shit *,char *)) { + int i; + for(i=0;libline.fds[i].fd != -1;i++);//we're going to use the index of the first -1 + libline.fds[i].fd=fd; + libline.fds[i].backlog=malloc(CHUNK); + memset(libline.fds[i].backlog,0,CHUNK); + memset(libline.fds[i].buffer,0,CHUNK); + libline.fds[i].blsize=CHUNK; + libline.fds[i].bllen=0;//CHUNK; + libline.fds[i].line_handler=line_handler; + libline.shitlen = i >= libline.shitlen ? i+1 : libline.shitlen ; + update_shits(); + return 0; +} + +//functions to add: +/* +main_looper() +add_fd_and_handler()? +remove_fd_and_handler()? +*/ + + +#define SILLYLIMIT 1024 + +char *memstr(char *s,char *find,size_t l) { + return memmem(s,l,find,strlen(find)); +} + +int select_on_everything() { + int hack; + fd_set master; + fd_set readfs; +// struct timeval timeout; +// int fdmax=0,n,i; + int n,i,j; + char tmp[256]; + char *t,*line=0; + FD_ZERO(&master); + FD_ZERO(&readfs); + for(;;) { //at the start of each loop we'll need to recalculate some stuff if there was a change. + //printf("in mainloop\n"); + //if(recalc_shit) { //this is set by anything changing the table of descriptors + for(i=0;libline.fds[i].fd != -1;i++) { + FD_SET(libline.fds[i].fd,&master); + } + // recalc_shit=0; + //} + readfs=master; +// timeout.tv_sec=0; //going to leave these three lines if I change my mind about acting like snow-white +// timeout.tv_usec=1000; +// if((j=select(fdmax+1,&readfs,0,0,&timeout)) == -1 ) { + if((j=select(libline.fdmax+1,&readfs,0,0,NULL)) == -1 ) {//we want to select-sleep as long as possible. + //any reason to wake up should be a file descriptor in the list. (works for X11 events, dunno about others) + + //on error filedescriptors aren't changed + //the value of timeout is undefined + //so says the linux man page for select. + return perror("select"),1; + //continue; + } + +// for(i=0;fds[i] != -1;i++) if(extra_handler) extra_handler(fds[i]); + if(j == 0) continue;//don't bother to loop over them. + for(i=0;libline.fds[i].fd != -1 && j>0;i++) { + if(!FD_ISSET(libline.fds[i].fd,&readfs)) continue;//did not find one. hurry back to the for loop + j--;//we found one. trying to get j==0 so we can get out of here early. + if((n=read(libline.fds[i].fd,libline.fds[i].buffer,CHUNK)) <= 0) { + snprintf(tmp,sizeof(tmp)-1,"fd %d: read",libline.fds[i].fd);//hopefully this doesn't error and throw off error messages. + perror(tmp); + return 2; + } + if(libline.fds[i].bllen+n > libline.fds[i].blsize) {//this is probably off... + t=malloc(libline.fds[i].blsize+n); + if(!t) exit(253); + memcpy(t,libline.fds[i].backlog,libline.fds[i].blsize); + libline.fds[i].blsize+=n; + free(libline.fds[i].backlog); + libline.fds[i].backlog=t; + } + memcpy(libline.fds[i].backlog+libline.fds[i].bllen,libline.fds[i].buffer,n); + libline.fds[i].bllen+=n; + while((t=memchr(libline.fds[i].backlog,'\n',libline.fds[i].bllen))) {//no. backlogs aren't nulled. + line=libline.fds[i].backlog; + if(*(t-1) == '\r') { + t--; + hack=2; + } else { + hack=1; + } + *t=0; + if(libline.fds[i].line_handler) libline.fds[i].line_handler(&libline.fds[i],line); + libline.fds[i].bllen-=((t+hack)-libline.fds[i].backlog); + if(libline.fds[i].bllen <= 0) libline.fds[i].bllen=0; + else memmove(libline.fds[i].backlog,(t+hack),libline.fds[i].bllen); + } + } + } + return 0; +} + +//this function mangles the input. +//gotta free the returned pointer but not each pointer in the array. + +/* +char **line_cutter(int fd,char *line,struct user *user) { + int i; + char **a=malloc(sizeof(char *) * 256);//heh. + if(!a) exit(54); + memset(a,0,sizeof(char *) * 256); + if(!user) return 0; + user->nick=0; + user->user=0; + user->host=0; + if(!line) return 0; + if(strchr(line,'\r')) *strchr(line,'\r')=0; + if(strchr(line,'\n')) *strchr(line,'\n')=0; + if(line[0]==':') { + if((user->nick=strchr(line,':'))) { + *(user->nick)=0; + (user->nick)++; + } + } + if(user->nick) { + + if((a[0]=strchr((user->nick),' '))) { + *a[0]=0; + a[0]++; + for(i=0;(a[i+1]=strchr(a[i],' '));i++) { + *a[i+1]=0; + a[i+1]++; + if(*a[i+1] == ':') {//we're done. + *a[i+1]=0; + a[i+1]++; + break; + } + } + } + + if(((user->user)=strchr((user->nick),'!'))) { + *(user->user)=0; + (user->user)++; + if(((user->host)=strchr((user->user),'@'))) { + *(user->host)=0; + (user->host)++; + } + } else { + user->host=user->nick; + } + } + return a; +} +*/ |