2 ** mhparse.h -- definitions for parsing/building of MIME content
3 ** -- (mhparse.c/mhbuild.c)
11 ** Abstract type for header fields
13 typedef struct hfield *HF;
16 ** Abstract types for MIME parsing/building
18 typedef struct cefile *CE;
19 typedef struct CTinfo *CI;
20 typedef struct Content *CT;
23 ** type for Init function (both type and transfer encoding)
25 typedef int (*InitFunc) (CT);
28 ** types for various transfer encoding access functions
30 typedef int (*OpenCEFunc) (CT, char **);
31 typedef void (*CloseCEFunc) (CT);
32 typedef unsigned long (*SizeCEFunc) (CT);
35 ** Structure for storing/encoding/decoding
36 ** a header field and its value.
39 char *name; /* field name */
40 char *value; /* field body */
41 int hf_encoding; /* internal flag for transfer encoding to use */
42 HF next; /* link to next header field */
46 ** Structure for storing parsed elements
47 ** of the Content-Type component.
50 char *ci_type; /* content type */
51 char *ci_subtype; /* content subtype */
52 char *ci_attrs[NPARMS + 2]; /* attribute names */
53 char *ci_values[NPARMS]; /* attribute values */
54 char *ci_comment; /* RFC-822 comments */
59 ** Structure for storing decoded contents after
60 ** removing Content-Transfer-Encoding.
63 char *ce_file; /* decoded content (file) */
64 FILE *ce_fp; /* decoded content (stream) */
65 int ce_unlink; /* remove file when done? */
69 ** Primary structure for handling Content (Entity)
72 /* source (read) file */
73 char *c_file; /* read contents (file) */
74 FILE *c_fp; /* read contents (stream) */
75 int c_unlink; /* remove file when done? */
77 long c_begin; /* where content body starts in file */
78 long c_end; /* where content body ends in file */
80 /* linked list of header fields */
81 HF c_first_hf; /* pointer to first header field */
82 HF c_last_hf; /* pointer to last header field */
84 /* copies of MIME related header fields */
85 char *c_vrsn; /* MIME-Version: */
86 char *c_ctline; /* Content-Type: */
87 char *c_celine; /* Content-Transfer-Encoding: */
88 char *c_id; /* Content-ID: */
89 char *c_descr; /* Content-Description: */
90 char *c_dispo; /* Content-Disposition: */
91 char *c_partno; /* within multipart content */
93 /* Content-Type info */
94 struct CTinfo c_ctinfo; /* parsed elements of Content-Type */
95 int c_type; /* internal flag for content type */
96 int c_subtype; /* internal flag for content subtype */
98 /* Content-Transfer-Encoding info (decoded contents) */
99 CE c_cefile; /* structure holding decoded content */
100 int c_encoding; /* internal flag for encoding type */
102 /* pointers to content-specific structures */
103 void *c_ctparams; /* content type specific data */
105 /* function pointers */
106 InitFunc c_ctinitfnx; /* parse content body */
107 OpenCEFunc c_ceopenfnx; /* get a stream to decoded contents */
108 CloseCEFunc c_ceclosefnx; /* release stream */
109 SizeCEFunc c_cesizefnx; /* size of decoded contents */
111 int c_umask; /* associated umask */
112 pid_t c_pid; /* process doing display */
113 int c_rfc934; /* rfc934 compatibility flag */
115 char *c_showproc; /* default, if not in profile */
116 char *c_termproc; /* for charset madness... */
117 char *c_storeproc; /* overrides profile entry, if any */
119 char *c_storage; /* write contents (file) */
120 char *c_folder; /* write contents (folder) */
124 ** Flags for Content-Type (Content->c_type)
126 #define CT_UNKNOWN 0x00
127 #define CT_APPLICATION 0x01
128 #define CT_AUDIO 0x02
129 #define CT_IMAGE 0x03
130 #define CT_MESSAGE 0x04
131 #define CT_MULTIPART 0x05
133 #define CT_VIDEO 0x07
134 #define CT_EXTENSION 0x08
137 ** Flags for Content-Transfer-Encoding (Content->c_encoding)
139 #define CE_UNKNOWN 0x00
140 #define CE_BASE64 0x01
141 #define CE_QUOTED 0x02
144 #define CE_BINARY 0x05
145 #define CE_EXTENSION 0x06
146 #define CE_EXTERNAL 0x07 /* for external-body */
152 /* Flags for subtypes of TEXT */
153 #define TEXT_UNKNOWN 0x00
154 #define TEXT_PLAIN 0x01
155 #define TEXT_RICHTEXT 0x02
156 #define TEXT_ENRICHED 0x03
158 /* Flags for character sets */
159 #define CHARSET_UNKNOWN 0x00
160 #define CHARSET_UNSPECIFIED 0x01 /* only needed when building drafts */
161 #define CHARSET_USASCII 0x01
162 #define CHARSET_LATIN 0x02
164 /* Structure for text content */
166 int tx_charset; /* flag for character set */
173 /* Flags for subtypes of MULTIPART */
174 #define MULTI_UNKNOWN 0x00
175 #define MULTI_MIXED 0x01
176 #define MULTI_ALTERNATE 0x02
177 #define MULTI_DIGEST 0x03
178 #define MULTI_PARALLEL 0x04
180 /* Structure for subparts of a multipart content */
182 CT mp_part; /* Content structure for subpart */
183 struct part *mp_next; /* pointer to next subpart structure */
186 /* Main structure for multipart content */
188 char *mp_start; /* boundary string separating parts */
189 char *mp_stop; /* terminating boundary string */
190 struct part *mp_parts; /* pointer to first subpart structure */
197 /* Flags for subtypes of MESSAGE */
198 #define MESSAGE_UNKNOWN 0x00
199 #define MESSAGE_RFC822 0x01
200 #define MESSAGE_PARTIAL 0x02
201 #define MESSAGE_EXTERNAL 0x03
203 /* Structure for message/partial */
213 ** APPLICATION content
216 /* Flags for subtype of APPLICATION */
217 #define APPLICATION_UNKNOWN 0x00
218 #define APPLICATION_OCTETS 0x01
219 #define APPLICATION_POSTSCRIPT 0x02
223 ** Structures for mapping types to their internal flags
229 extern struct k2v SubText[];
230 extern struct k2v Charset[];
231 extern struct k2v SubMultiPart[];
232 extern struct k2v SubMessage[];
233 extern struct k2v SubApplication[];
236 ** Structures for mapping (content) types to
237 ** the functions to handle them.
244 extern struct str2init str2cts[];
245 extern struct str2init str2ces[];
251 CT parse_mime(char *);
252 int add_header(CT, char *, char *);
253 int get_ctinfo(unsigned char *, CT, int);
254 int open7Bit(CT, char **);
255 void close_encoding(CT);