722 lines
13 KiB
C
722 lines
13 KiB
C
/*
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** Copyright 1998 - 1999 Double Precision, Inc.
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** See COPYING for distribution information.
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*/
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/*
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** $Id$
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "rfc822.h"
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static void tokenize(const char *p, struct rfc822token *tokp, int *toklen,
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void (*err_func)(const char *, int))
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{
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const char *addr=p;
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int i=0;
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int inbracket=0;
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*toklen=0;
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while (*p)
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{
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if (isspace((int)(unsigned char)*p))
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{
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p++;
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i++;
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continue;
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}
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switch (*p) {
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int level;
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case '(':
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if (tokp)
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{
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tokp->token='(';
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tokp->ptr=p;
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tokp->len=0;
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}
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level=0;
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for (;;)
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{
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if (!*p)
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{
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if (err_func) (*err_func)(addr, i);
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if (tokp) tokp->token='"';
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++*toklen;
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return;
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}
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if (*p == '(')
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++level;
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if (*p == ')' && --level == 0)
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{
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p++;
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i++;
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if (tokp) tokp->len++;
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break;
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}
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if (*p == '\\' && p[1])
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{
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p++;
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i++;
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if (tokp) tokp->len++;
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}
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i++;
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if (tokp) tokp->len++;
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p++;
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}
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if (tokp) ++tokp;
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++*toklen;
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continue;
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case '"':
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p++;
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i++;
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if (tokp)
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{
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tokp->token='"';
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tokp->ptr=p;
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}
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while (*p != '"')
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{
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if (!*p)
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{
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if (err_func) (*err_func)(addr, i);
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++*toklen;
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return;
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}
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if (*p == '\\' && p[1])
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{
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if (tokp) tokp->len++;
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p++;
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i++;
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}
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if (tokp) tokp->len++;
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p++;
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i++;
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}
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++*toklen;
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if (tokp) ++tokp;
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p++;
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i++;
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continue;
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case '\\':
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case ')':
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if (err_func) (*err_func)(addr, i);
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++p;
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++i;
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continue;
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case '<':
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case '>':
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case '@':
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case ',':
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case ';':
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case ':':
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case '.':
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case '[':
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case ']':
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case '%':
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case '!':
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case '?':
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case '=':
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case '/':
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if ( (*p == '<' && inbracket) ||
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(*p == '>' && !inbracket))
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{
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if (err_func) (*err_func)(addr, i);
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++p;
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++i;
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continue;
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}
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if (*p == '<')
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inbracket=1;
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if (*p == '>')
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inbracket=0;
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if (tokp)
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{
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tokp->token= *p;
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tokp->ptr=p;
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tokp->len=1;
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++tokp;
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}
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++*toklen;
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if (*p == '<' && p[1] == '>')
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/* Fake a null address */
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{
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if (tokp)
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{
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tokp->token=0;
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tokp->ptr="";
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tokp->len=0;
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++tokp;
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}
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++*toklen;
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}
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++p;
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++i;
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continue;
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default:
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if (tokp)
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{
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tokp->token=0;
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tokp->ptr=p;
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tokp->len=0;
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}
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while (*p && !isspace((int)(unsigned char)*p) && strchr(
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"<>@,;:.[]()%!\"\\?=/", *p) == 0)
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{
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if (tokp) ++tokp->len;
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++p;
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++i;
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}
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if (i == 0) /* Idiot check */
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{
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if (err_func) (*err_func)(addr, i);
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if (tokp)
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{
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tokp->token='"';
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tokp->ptr=p;
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tokp->len=1;
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++tokp;
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}
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++*toklen;
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++p;
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++i;
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continue;
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}
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if (tokp) ++tokp;
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++*toklen;
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}
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}
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}
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static void parseaddr(struct rfc822token *tokens, int ntokens,
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struct rfc822addr *addrs, int *naddrs)
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{
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int flag, j, k;
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struct rfc822token save_token;
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*naddrs=0;
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while (ntokens)
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{
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int i;
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/* atoms (token=0) or quoted strings, followed by a : token
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is a list name. */
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for (i=0; i<ntokens; i++)
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if (tokens[i].token && tokens[i].token != '"')
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break;
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if (i < ntokens && tokens[i].token == ':')
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{
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++i;
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if (addrs)
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{
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addrs->tokens=0;
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addrs->name=i ? tokens:0;
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for (j=1; j<i; j++)
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addrs->name[j-1].next=addrs->name+j;
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if (i)
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addrs->name[i-1].next=0;
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addrs++;
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}
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++*naddrs;
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tokens += i;
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ntokens -= i;
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continue; /* Group=phrase ":" */
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}
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/* Spurious commas are skipped, ;s are recorded */
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if (tokens->token == ',' || tokens->token == ';')
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{
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if (tokens->token == ';')
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{
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if (addrs)
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{
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addrs->tokens=0;
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addrs->name=tokens;
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addrs->name->next=0;
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addrs++;
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}
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++*naddrs;
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}
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++tokens;
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--ntokens;
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continue;
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}
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/* If we can find a '<' before the next comma or semicolon,
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we have new style RFC path address */
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for (i=0; i<ntokens && tokens[i].token != ';' &&
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tokens[i].token != ',' &&
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tokens[i].token != '<'; i++)
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;
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if (i < ntokens && tokens[i].token == '<')
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{
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int j;
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/* Ok -- what to do with the stuff before '>'???
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If it consists exclusively of atoms, leave them alone.
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Else, make them all a quoted string. */
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for (j=0; j<i && (tokens[j].token == 0 ||
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tokens[j].token == '('); j++)
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;
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if (j == i)
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{
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if (addrs)
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{
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addrs->name= i ? tokens:0;
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for (k=1; k<i; k++)
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addrs->name[k-1].next=addrs->name+k;
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if (i)
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addrs->name[i-1].next=0;
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}
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}
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else /* Intentionally corrupt the original toks */
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{
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if (addrs)
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{
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tokens->len= tokens[i-1].ptr
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+ tokens[i-1].len
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- tokens->ptr;
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/* We know that all the ptrs point
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to parts of the same string. */
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tokens->token='"';
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/* Quoted string. */
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addrs->name=tokens;
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addrs->name->next=0;
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}
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}
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/* Any comments in the name part are changed to quotes */
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if (addrs)
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{
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struct rfc822token *t;
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for (t=addrs->name; t; t=t->next)
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if (t->token == '(')
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t->token='"';
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}
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/* Now that's done and over with, see what can
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be done with the <...> part. */
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++i;
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tokens += i;
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ntokens -= i;
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for (i=0; i<ntokens && tokens[i].token != '>'; i++)
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;
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if (addrs)
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{
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addrs->tokens=i ? tokens:0;
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for (k=1; k<i; k++)
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addrs->tokens[k-1].next=addrs->tokens+k;
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if (i)
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addrs->tokens[i-1].next=0;
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++addrs;
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}
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++*naddrs;
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tokens += i;
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ntokens -= i;
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if (ntokens) /* Skip the '>' token */
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{
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--ntokens;
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++tokens;
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}
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continue;
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}
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/* Ok - old style address. Assume the worst */
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/* Try to figure out where the address ends. It ends upon:
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a comma, semicolon, or two consecutive atoms. */
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flag=0;
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for (i=0; i<ntokens && tokens[i].token != ',' &&
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tokens[i].token != ';'; i++)
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{
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if (tokens[i].token == '(') continue;
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/* Ignore comments */
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if (tokens[i].token == 0 || tokens[i].token == '"')
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/* Atom */
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{
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if (flag) break;
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flag=1;
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}
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else flag=0;
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}
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if (i == 0) /* Must be spurious comma, or something */
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{
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++tokens;
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--ntokens;
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continue;
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}
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if (addrs)
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{
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addrs->name=0;
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}
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/* Ok, now get rid of embedded comments in the address.
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Consider the last comment to be the real name */
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if (addrs)
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{
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save_token.ptr=0;
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save_token.len=0;
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for (j=k=0; j<i; j++)
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{
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if (tokens[j].token == '(')
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{
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save_token=tokens[j];
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continue;
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}
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tokens[k]=tokens[j];
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k++;
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}
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if (save_token.ptr)
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{
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tokens[i-1]=save_token;
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addrs->name=tokens+i-1;
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addrs->name->next=0;
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}
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addrs->tokens=k ? tokens:NULL;
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for (j=1; j<k; j++)
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addrs->tokens[j-1].next=addrs->tokens+j;
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if (k)
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addrs->tokens[k-1].next=0;
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++addrs;
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}
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++*naddrs;
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tokens += i;
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ntokens -= i;
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}
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}
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static void print_token(const struct rfc822token *token,
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void (*print_func)(char, void *), void *ptr)
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{
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const char *p;
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int n;
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if (token->token == 0 || token->token == '(')
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{
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for (n=token->len, p=token->ptr; n; --n, ++p)
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(*print_func)(*p, ptr);
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return;
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}
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if (token->token != '"')
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{
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(*print_func)(token->token, ptr);
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return;
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}
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(*print_func)('"', ptr);
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n=token->len;
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p=token->ptr;
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while (n)
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{
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if (*p == '"' || (*p == '\\' && n == 1)) (*print_func)('\\', ptr);
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if (*p == '\\' && n > 1)
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{
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(*print_func)('\\', ptr);
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++p;
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--n;
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}
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(*print_func)(*p++, ptr);
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--n;
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}
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(*print_func)('"', ptr);
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}
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void rfc822tok_print(const struct rfc822token *token,
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void (*print_func)(char, void *), void *ptr)
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{
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int prev_isatom=0;
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int isatom;
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while (token)
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{
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isatom=rfc822_is_atom(token->token);
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if (prev_isatom && isatom)
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(*print_func)(' ', ptr);
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print_token(token, print_func, ptr);
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prev_isatom=isatom;
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token=token->next;
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}
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}
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void rfc822_print(const struct rfc822a *rfcp, void (*print_func)(char, void *),
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void (*print_separator)(const char *s, void *), void *ptr)
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{
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rfc822_print_common(rfcp, 0, 0, print_func, print_separator, ptr);
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}
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void rfc822_print_common(const struct rfc822a *rfcp,
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char *(*decode_func)(const char *, const char *), const char *chset,
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void (*print_func)(char, void *),
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void (*print_separator)(const char *, void *), void *ptr)
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{
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const struct rfc822addr *addrs=rfcp->addrs;
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int naddrs=rfcp->naddrs;
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while (naddrs)
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{
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if (addrs->tokens == 0)
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{
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rfc822tok_print(addrs->name, print_func, ptr);
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++addrs;
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--naddrs;
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if (addrs[-1].name && naddrs)
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{
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struct rfc822token *t;
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for (t=addrs[-1].name; t && t->next; t=t->next)
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;
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if (t && (t->token == ':' || t->token == ';'))
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(*print_separator)(" ", ptr);
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}
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continue;
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}
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else if (addrs->name && addrs->name->token == '(')
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{ /* old style */
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char *p;
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rfc822tok_print(addrs->tokens, print_func, ptr);
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(*print_func)(' ', ptr);
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if (decode_func && (p=rfc822_gettok(addrs->name))!=0)
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{
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char *q= (*decode_func)(p, chset);
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char *r;
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for (r=q; r && *r; r++)
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(*print_func)( (int)(unsigned char)*r,
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ptr);
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if (q) free(q);
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free(p);
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}
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else rfc822tok_print(addrs->name, print_func, ptr);
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}
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else
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{
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int print_braces=0;
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char *p;
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if (addrs->name)
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{
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if (decode_func &&
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(p=rfc822_gettok(addrs->name)) != 0)
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{
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char *q= (*decode_func)(p, chset);
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char *r;
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for (r=q; r && *r; r++)
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(*print_func)(
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(int)(unsigned char)*r,
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ptr);
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if (q) free(q);
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free(p);
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}
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else rfc822tok_print(addrs->name,
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print_func, ptr);
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(*print_func)(' ', ptr);
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print_braces=1;
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}
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else
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{
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struct rfc822token *p;
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for (p=addrs->tokens; p && p->next; p=p->next)
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if (rfc822_is_atom(p->token) &&
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rfc822_is_atom(p->next->token))
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print_braces=1;
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}
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if (print_braces)
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(*print_func)('<', ptr);
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rfc822tok_print(addrs->tokens, print_func, ptr);
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if (print_braces)
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{
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(*print_func)('>', ptr);
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}
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}
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++addrs;
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--naddrs;
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if (naddrs)
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if (addrs->tokens || (addrs->name &&
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rfc822_is_atom(addrs->name->token)))
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(*print_separator)(", ", ptr);
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}
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}
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void rfc822t_free(struct rfc822t *p)
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{
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if (p->tokens) free(p->tokens);
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free(p);
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}
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void rfc822a_free(struct rfc822a *p)
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{
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if (p->addrs) free(p->addrs);
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free(p);
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}
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void rfc822_deladdr(struct rfc822a *rfcp, int index)
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{
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int i;
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if (index < 0 || index >= rfcp->naddrs) return;
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for (i=index+1; i<rfcp->naddrs; i++)
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rfcp->addrs[i-1]=rfcp->addrs[i];
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if (--rfcp->naddrs == 0)
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{
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free(rfcp->addrs);
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rfcp->addrs=0;
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}
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}
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struct rfc822t *rfc822t_alloc(const char *addr,
|
|
void (*err_func)(const char *, int))
|
|
{
|
|
struct rfc822t *p=(struct rfc822t *)malloc(sizeof(struct rfc822t));
|
|
|
|
if (!p) return (NULL);
|
|
memset(p, 0, sizeof(*p));
|
|
|
|
tokenize(addr, NULL, &p->ntokens, err_func);
|
|
p->tokens=p->ntokens ? (struct rfc822token *)
|
|
calloc(p->ntokens, sizeof(struct rfc822token)):0;
|
|
if (p->ntokens && !p->tokens)
|
|
{
|
|
rfc822t_free(p);
|
|
return (NULL);
|
|
}
|
|
tokenize(addr, p->tokens, &p->ntokens, NULL);
|
|
return (p);
|
|
}
|
|
|
|
struct rfc822a *rfc822a_alloc(struct rfc822t *t)
|
|
{
|
|
struct rfc822a *p=(struct rfc822a *)malloc(sizeof(struct rfc822a));
|
|
|
|
if (!p) return (NULL);
|
|
memset(p, 0, sizeof(*p));
|
|
|
|
parseaddr(t->tokens, t->ntokens, NULL, &p->naddrs);
|
|
p->addrs=p->naddrs ? (struct rfc822addr *)
|
|
calloc(p->naddrs, sizeof(struct rfc822addr)):0;
|
|
if (p->naddrs && !p->addrs)
|
|
{
|
|
rfc822a_free(p);
|
|
return (NULL);
|
|
}
|
|
parseaddr(t->tokens, t->ntokens, p->addrs, &p->naddrs);
|
|
return (p);
|
|
}
|
|
|
|
void rfc822_praddr(const struct rfc822a *rfcp, int index,
|
|
void (*print_func)(char, void *), void *ptr)
|
|
{
|
|
const struct rfc822addr *addrs;
|
|
|
|
if (index < 0 || index >= rfcp->naddrs) return;
|
|
|
|
addrs=rfcp->addrs+index;
|
|
if (addrs->tokens)
|
|
{
|
|
rfc822tok_print(addrs->tokens, print_func, ptr);
|
|
(*print_func)('\n', ptr);
|
|
}
|
|
}
|
|
|
|
void rfc822_addrlist(const struct rfc822a *rfcp,
|
|
void (*print_func)(char, void *), void *ptr)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<rfcp->naddrs; i++)
|
|
rfc822_praddr(rfcp, i, print_func, ptr);
|
|
}
|
|
|
|
void rfc822_prname(const struct rfc822a *rfcp, int index,
|
|
void (*print_func)(char, void *), void *ptr)
|
|
{
|
|
const struct rfc822addr *addrs;
|
|
|
|
if (index < 0 || index >= rfcp->naddrs) return;
|
|
|
|
addrs=rfcp->addrs+index;
|
|
|
|
if (!addrs->tokens) return;
|
|
rfc822_prname_orlist(rfcp, index, print_func, ptr);
|
|
}
|
|
|
|
void rfc822_prname_orlist(const struct rfc822a *rfcp, int index,
|
|
void (*print_func)(char, void *), void *ptr)
|
|
{
|
|
const struct rfc822addr *addrs;
|
|
|
|
if (index < 0 || index >= rfcp->naddrs) return;
|
|
|
|
addrs=rfcp->addrs+index;
|
|
|
|
if (addrs->name)
|
|
{
|
|
struct rfc822token *i;
|
|
int n;
|
|
int prev_isatom=0;
|
|
int isatom=0;
|
|
|
|
for (i=addrs->name; i; i=i->next, prev_isatom=isatom)
|
|
{
|
|
isatom=rfc822_is_atom(i->token);
|
|
if (isatom && prev_isatom)
|
|
(*print_func)(' ', ptr);
|
|
|
|
if (i->token != '(')
|
|
{
|
|
print_token(i, print_func, ptr);
|
|
continue;
|
|
}
|
|
|
|
for (n=2; n<i->len; n++)
|
|
(*print_func)(i->ptr[n-1], ptr);
|
|
}
|
|
} else
|
|
rfc822tok_print(addrs->tokens, print_func, ptr);
|
|
(*print_func)('\n', ptr);
|
|
}
|
|
|
|
void rfc822_namelist(const struct rfc822a *rfcp,
|
|
void (*print_func)(char, void *), void *ptr)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<rfcp->naddrs; i++)
|
|
rfc822_prname(rfcp, i, print_func, ptr);
|
|
}
|