Replace `(char *)0' et al with `NULL'.

[nmh] / h / prototypes.h

diff --git a/h/prototypes.h b/h/prototypes.h
index 484bef28648bcc48c578015c437bd631d18418e0..f06322b508c6ef0fdb91c3132a7dc7bb09d740db 100644 (file)
--- a/h/prototypes.h
+++ b/h/prototypes.h
@@ -6,18 +6,6 @@
  * as much as practical.
  */
 
  * as much as practical.
  */
 

-/*
- * missing system prototypes
- */
-#if ! defined(HAVE_TERMCAP_H) && ! defined (HAVE_NCURSES_TERMCAP_H)
-  extern int tgetent (char *bp, char *name);
-  extern int tgetnum (char *id);
-  extern int tgetflag (char *id);
-  extern char *tgetstr (char *id, char **area);
-  extern char *tgoto (char *cm, int destcol, int destline);
-  extern int tputs (char *cp, int affcnt, int (*outc) (int));
-#endif
-

 /*
  * prototype from config.h
  */
 /*
  * prototype from config.h
  */


@@ -29,35 +17,86 @@ char *etcpath(char *);
 
 struct msgs_array;
 
 
 struct msgs_array;
 

-void adios (char *, char *, ...) NORETURN;
+void add_profile_entry (const char *, const char *);
+void adios (const char *, const char *, ...) NORETURN;

 void admonish (char *, char *, ...);
 void admonish (char *, char *, ...);

-void advertise (char *, char *, char *, va_list);
-void advise (char *, char *, ...);
+void advertise (const char *, char *, const char *, va_list);
+void advise (const char *, const char *, ...);

 char **argsplit (char *, char **, int *);
 void argsplit_msgarg (struct msgs_array *, char *, char **);
 void argsplit_insert (struct msgs_array *, char *, char **);
 void arglist_free (char *, char **);
 char **argsplit (char *, char **, int *);
 void argsplit_msgarg (struct msgs_array *, char *, char **);
 void argsplit_insert (struct msgs_array *, char *, char **);
 void arglist_free (char *, char **);

-void ambigsw (char *, struct swit *);
+void ambigsw (const char *, const struct swit *);

 int atooi(char *);
 char **brkstring (char *, char *, char *);
 int atooi(char *);
 char **brkstring (char *, char *, char *);

+
+/*
+ * Check to see if we can display a given character set natively.
+ * Arguments include:
+ *
+ * str - Name of character set to check against
+ * len - Length of "str"
+ *
+ * Returns 1 if the specified character set can be displayed natively,
+ * 0 otherwise.
+ */
+

 int check_charset (char *, int);
 int client(char *, char *, char *, int, int);
 void closefds(int);
 char *concat (const char *, ...);
 int context_del (char *);
 int check_charset (char *, int);
 int client(char *, char *, char *, int, int);
 void closefds(int);
 char *concat (const char *, ...);
 int context_del (char *);

-char *context_find (char *);
+char *context_find (const char *);
+char *context_find_by_type (const char *, const char *, const char *);
+int context_find_prefix(const char *);

 int context_foil (char *);
 void context_read (void);
 void context_replace (char *, char *);
 void context_save (void);
 char *copy (const char *, char *);
 char **copyip (char **, char **, int);
 int context_foil (char *);
 void context_read (void);
 void context_replace (char *, char *);
 void context_save (void);
 char *copy (const char *, char *);
 char **copyip (char **, char **, int);

-void cpydata (int, int, char *, char *);
+void cpydata (int, int, const char *, const char *);

 void cpydgst (int, int, char *, char *);
 char *cpytrim (const char *);
 void cpydgst (int, int, char *, char *);
 char *cpytrim (const char *);

+char *rtrim (char *);

 int decode_rfc2047 (char *, char *, size_t);
 void discard (FILE *);
 int decode_rfc2047 (char *, char *, size_t);
 void discard (FILE *);

+char *upcase (const char *);
+
+/*
+ * Decode two characters into their quoted-printable representation.
+ *
+ * Arguments are:
+ *
+ * byte1       - First character of Q-P representation
+ * byte2       - Second character of Q-P representation
+ *
+ * Returns the decoded value, -1 if the conversion failed.
+ */
+int decode_qp(unsigned char byte1, unsigned char byte2);
+

 int default_done (int);
 int default_done (int);

+
+/*
+ * Encode a message header using RFC 2047 encoding.  If the message contains
+ * no non-ASCII characters, then leave the header as-is.
+ *
+ * Arguments include:
+ *
+ * name                - Message header name
+ * value       - Message header content; must point to allocated memory
+ *               (may be changed if encoding is necessary)
+ * encoding    - Encoding type.  May be one of CE_UNKNOWN (function chooses
+ *               the encoding), CE_BASE64 or CE_QUOTED
+ * charset     - Charset used for encoding.  If NULL, obtain from system
+ *               locale.
+ *
+ * Returns 0 on success, any other value on failure.
+ */
+
+int encode_rfc2047(const char *name, char **value, int encoding,
+                  const char *charset);
+

 void escape_display_name (char *, size_t);
 void escape_local_part (char *, size_t);
 int ext_hook(char *, char *, char *);
 void escape_display_name (char *, size_t);
 void escape_local_part (char *, size_t);
 int ext_hook(char *, char *, char *);


@@ -80,17 +119,111 @@ int folder_pack (struct msgs **, int);
 struct msgs *folder_read (char *name, int lockflag);
 
 struct msgs *folder_realloc (struct msgs *, int, int);
 struct msgs *folder_read (char *name, int lockflag);
 
 struct msgs *folder_realloc (struct msgs *, int, int);

-int gans (char *, struct swit *);
-char **getans (char *, struct swit *);
+
+/*
+ * Flush standard output, read a line from standard input into a static buffer,
+ * zero out the newline, and return a pointer to the buffer.
+ * On error, return NULL.
+ */
+const char *read_line(void);
+
+/*
+ * Print null-terminated PROMPT to and flush standard output.  Read answers from
+ * standard input until one matches an entry in SWITCHES.  When one matches,
+ * return its swret field.  Return 0 on EOF.
+ */
+int read_switch(const char *PROMPT, const struct swit *SWITCHES);
+
+/*
+ * If standard input is not a tty, return 1 without printing anything.  Else,
+ * print null-terminated PROMPT to and flush standard output.  Read answers from
+ * standard input until one is "yes" or "no", returning 1 for "yes" and 0 for
+ * "no".  Also return 0 on EOF.
+ */
+int read_yes_or_no_if_tty(const char *PROMPT);
+
+/*
+ * Print null-terminated PROMPT to and flush standard output.  Read multi-word
+ * answers from standard input until a first word matches an entry in SWITCHES.
+ * When one matches, return a pointer to an array of pointers to the words.
+ * Return NULL on EOF, interrupt, or other error.
+ */
+char **read_switch_multiword(const char *PROMPT, const struct swit *SWITCHES);
+
+/*
+ * Same as read_switch_multiword but using readline(3) for input.
+ */

 #ifdef READLINE_SUPPORT
 #ifdef READLINE_SUPPORT

-char **getans_via_readline (char *, struct swit *);
+char **read_switch_multiword_via_readline (char *, struct swit *);

 #endif /* READLINE_SUPPORT */
 #endif /* READLINE_SUPPORT */

-int getanswer (char *);
+

 char **getarguments (char *, int, char **, int);
 char **getarguments (char *, int, char **, int);

+
+/*
+ * Returns the MIME character set indicated by the current locale setting.
+ * Should be used by routines that want to convert to/from the local
+ * character set, or if you want to check to see if you can display content
+ * in the local character set.
+ */

 char *get_charset(void);
 char *get_charset(void);

-char *getcpy (char *);
+
+/* Return malloc'd copy of str, or of "" if NULL, exit on failure. */
+char *getcpy(const char *str);
+

 char *get_default_editor(void);
 char *getfolder(int);
 char *get_default_editor(void);
 char *getfolder(int);

+
+/*
+ * Get a string from the terminfo database for the current terminal.
+ *
+ * Retrieve the specified terminfo capability and return a string that
+ * can be output to the terminal.  The string returned has already been
+ * processed by tputs(), so it is safe to output directly.  The return
+ * value of this function is valid until the next call.
+ *
+ * Arguments:
+ *
+ * capability  - The name of the terminfo capability (see terminfo(5)).
+ *
+ * Returns a tputs-processed string, or NULL if terminal initialization failed
+ * or the capability wasn't found.
+ */
+char *get_term_stringcap(char *capability);
+
+/*
+ * Get a parameterized string from the terminfo database for the current
+ * terminal.
+ *
+ * We don't yet have a standardized tparm() that will take a stdarg
+ * argument.  Right now we don't want many parameters, so we only
+ * take two.  Everything gets passed to tparm() as-is.  If we need
+ * a capability with more arguments, we'll just add more later.
+ *
+ * Arguments:
+ *
+ * capability  - The name of the terminfo capability (see terminfo(5)).
+ * arg1..argN  - Arguments 1-N.
+ *
+ * Returns a tparm and tputs-processed string, or NULL if there was a problem
+ * initializating the terminal or retrieving the capability.
+ */
+char *get_term_stringparm(char *capability, long arg1, long arg2);
+
+/*
+ * Get a number from the terminfo database for the current terminal.
+ *
+ * Retrieve the specified terminfo capability and return the numeric
+ * value of that capability from the terminfo database.
+ *
+ * Arguments:
+ *
+ * capability  - The name of the terminfo capability (see terminfo(5)).
+ *
+ * Returns the output of tigetnum() for that capability, or -1 if it was
+ * unable to initialize the terminfo database.
+ */
+int get_term_numcap(char *capability);
+

 /*
  * Lock open/close routines.
  *
 /*
  * Lock open/close routines.
  *


@@ -102,21 +235,21 @@ char *getfolder(int);
  *
  * Files opened for reading are locked with a read lock (if possible by
  * the underlying lock mechanism), files opened for writing are locked
  *
  * Files opened for reading are locked with a read lock (if possible by
  * the underlying lock mechanism), files opened for writing are locked

- * using an exclusive lock.
+ * using an exclusive lock.  The int * argument is used to indicate failure
+ * to acquire a lock.

  */
 int lkclosedata(int, const char *);
 int lkclosespool(int, const char *);
 int lkfclosedata(FILE *, const char *);
 int lkfclosespool(FILE *, const char *);
  */
 int lkclosedata(int, const char *);
 int lkclosespool(int, const char *);
 int lkfclosedata(FILE *, const char *);
 int lkfclosespool(FILE *, const char *);

-FILE *lkfopendata(const char *, const char *);
-int lkopendata(const char *, int, mode_t);
+FILE *lkfopendata(const char *, const char *, int *);
+int lkopendata(const char *, int, mode_t, int *);

 FILE *lkfopenspool(const char *, const char *);
 FILE *lkfopenspool(const char *, const char *);

-int lkopenspool(const char *, int, mode_t);
+int lkopenspool(const char *, int, mode_t, int *);

 int m_atoi (char *);
 int m_atoi (char *);

-char *m_backup (char *);
+char *m_backup (const char *);

 int m_convert (struct msgs *, char *);
 char *m_draft (char *, char *, int, int *);
 int m_convert (struct msgs *, char *);
 char *m_draft (char *, char *, int, int *);

-void m_eomsbr (m_getfld_state_t, int (*)(int));

 void m_getfld_state_reset (m_getfld_state_t *);
 void m_getfld_state_destroy (m_getfld_state_t *);
 void m_getfld_track_filepos (m_getfld_state_t *, FILE *);
 void m_getfld_state_reset (m_getfld_state_t *);
 void m_getfld_state_destroy (m_getfld_state_t *);
 void m_getfld_track_filepos (m_getfld_state_t *, FILE *);


@@ -129,11 +262,54 @@ int m_putenv (char *, char *);
 int m_rand (unsigned char *, size_t);
 char *m_mktemp(const char *, int *, FILE **);
 char *m_mktemp2(const char *, const char *, int *, FILE **);
 int m_rand (unsigned char *, size_t);
 char *m_mktemp(const char *, int *, FILE **);
 char *m_mktemp2(const char *, const char *, int *, FILE **);

+char *m_mktemps(const char *pfx, const char *suffix, int *, FILE **);
+char *get_temp_dir();
+
+/*
+ * Create a subprocess and redirect our standard output to it.
+ *
+ * Arguments are:
+ *
+ * name                - Name of process to create
+ * savestdout  - If true, will save the current stdout file descriptor and
+ *               m_pclose() will close it at the appropriate time.
+ */
+void m_popen(char *name, int savestdout);
+
+/*
+ * Wait for the last process opened by m_popen().
+ */
+void m_pclose(void);
+

 void m_unknown(m_getfld_state_t *, FILE *);
 void m_unknown(m_getfld_state_t *, FILE *);

-int makedir (char *);
+int makedir (const char *);

 char *message_id (time_t, int);
 char *message_id (time_t, int);

+
+/*
+ * Return a MIME content-type string for the specified file.
+ *
+ * If the system supports it, will use the "file" command to determine
+ * the appropriate content-type.  Otherwise it will try to determine the
+ * content-type from the suffix.  If that fails, the file will be scanned
+ * and either assigned a MIME type of text/plain or application/octet-stream
+ * depending if binary content is present.
+ *
+ * Arguments:
+ *
+ * filename    - The name of the file to determine the MIME type of.
+ *
+ * Returns a pointer to a content-type string (which may include MIME
+ * parameters, such as charset).  Returns a NULL if it cannot determine
+ * the MIME type of the file.  Returns allocated storage that must be
+ * free'd.
+ */
+char *mime_type(const char *filename);
+
+/*
+ * Clear the screen, using the appropriate entry from the terminfo database
+ */
+void nmh_clear_screen(void);

 char *nmh_getpass(const char *);
 char *nmh_getpass(const char *);

-char *norm_charmap(char *);

 char *new_fs (char *, char *, char *);
 char *path(char *, int);
 int peekc(FILE *ib);
 char *new_fs (char *, char *, char *);
 char *path(char *, int);
 int peekc(FILE *ib);


@@ -141,18 +317,18 @@ int pidwait (pid_t, int);
 int pidstatus (int, FILE *, char *);
 char *pluspath(char *);
 void print_help (char *, struct swit *, int);
 int pidstatus (int, FILE *, char *);
 char *pluspath(char *);
 void print_help (char *, struct swit *, int);

-void print_sw (char *, struct swit *, char *, FILE *);
+void print_intro (FILE *, int);
+void print_sw (const char *, const struct swit *, char *, FILE *);

 void print_version (char *);
 void push (void);
 char *pwd (void);
 char *r1bindex(char *, int);
 void print_version (char *);
 void push (void);
 char *pwd (void);
 char *r1bindex(char *, int);

-void readconfig (struct node **, FILE *, char *, int);
+void readconfig (struct node **, FILE *, const char *, int);

 int refile (char **, char *);
 int refile (char **, char *);

-void ruserpass(char *, char **, char **);
+void ruserpass (char *, char **, char **);

 int remdir (char *);
 void scan_detect_mbox_style (FILE *);
 void scan_finished ();
 int remdir (char *);
 void scan_detect_mbox_style (FILE *);
 void scan_finished ();

-void scan_eom_action (int (*)());

 void scan_reset_m_getfld_state ();
 int seq_addmsg (struct msgs *, char *, int, int, int);
 int seq_addsel (struct msgs *, char *, int, int);
 void scan_reset_m_getfld_state ();
 int seq_addmsg (struct msgs *, char *, int, int, int);
 int seq_addsel (struct msgs *, char *, int, int);


@@ -177,25 +353,81 @@ void seq_printall (struct msgs *);
  *               and a pointer to the filehandle will be stored in
  *               folder structure, where it will later be used by
  *               seq_save().
  *               and a pointer to the filehandle will be stored in
  *               folder structure, where it will later be used by
  *               seq_save().

+ *
+ * Return values:
+ *     OK       - successfully read the sequence files, or they don't exist
+ *     NOTOK    - failed to lock sequence file

  */
  */

-void seq_read (struct msgs * mp, int lockflag);
+int seq_read (struct msgs * mp, int lockflag);

 void seq_save (struct msgs *);
 void seq_setcur (struct msgs *, int);
 void seq_setprev (struct msgs *);
 void seq_setunseen (struct msgs *, int);
 int showfile (char **, char *);
 void seq_save (struct msgs *);
 void seq_setcur (struct msgs *, int);
 void seq_setprev (struct msgs *);
 void seq_setunseen (struct msgs *, int);
 int showfile (char **, char *);

-int smatch(char *, struct swit *);
-char *snprintb (char *, size_t, unsigned, char *);
-int ssequal (char *, char *);
+int smatch(const char *, const struct swit *);
+
+/*
+ * Convert a set of bit flags to printable format.
+ *
+ * Arguments:
+ *
+ * buffer      - Buffer to output string to.
+ * size                - Size of buffer in bytes.  Buffer is always NUL terminated.
+ * flags       - Binary flags to output
+ * bitfield    - Textual representation of bits to output.  This string
+ *               is in the following format:
+ *
+ *     Option byte 0x01 STRING1 0x02 STRING2 ....
+ *
+ * The first byte is an option byte to snprintb().  Currently the only option
+ * supported is 0x08, which indicates that the flags should be output in
+ * octal format; if the option byte is any other value, the flags will be
+ * output in hexadecimal.
+ *
+ * After the option bytes are series of text strings, prefixed by the number
+ * of the bit they correspond to.  For example, the bitfield string:
+ *
+ *     "\020\01FLAG1\02FLAG2\03FLAG3\04FLAG4"
+ *
+ * will output the following string if "flags" is set to 0x09:
+ *
+ *     0x2<FLAG1,FLAG4>
+ *
+ * You don't have to use octal in the bitfield string, that's just the
+ * convention currently used by the nmh code.  The order of flags in the
+ * bitfield string is not significant, but again, general convention is
+ * from least significant bit to most significant.
+ */
+char *snprintb (char *buffer, size_t size, unsigned flags, char *bitfield);
+int ssequal (const char *, const char *);

 int stringdex (char *, char *);
 char *trimcpy (char *);
 int unputenv (char *);
 int stringdex (char *, char *);
 char *trimcpy (char *);
 int unputenv (char *);

-int uprf (char *, char *);
+
+/*
+ * Remove quotes and quoted-pair sequences from RFC-5322 atoms.
+ *
+ * Currently the actual algorithm is simpler than it technically should
+ * be: any quotes are simply eaten, unless they're preceded by the escape
+ * character (\).  This seems to be sufficient for our needs for now.
+ *
+ * Arguments:
+ *
+ * input       - The input string
+ * output      - The output string; is assumed to have at least as much
+ *               room as the input string.  At worst the output string will
+ *               be the same size as the input string; it might be smaller.
+ *
+ */
+void unquote_string(const char *input, char *output);
+int uprf (const char *, const char *);

 int vfgets (FILE *, char **);
 int vfgets (FILE *, char **);

-char *write_charset_8bit (void);

 
 

-int mh_strcasecmp (const char *s1, const char *s2);
-int strncasecmp (const char *s1, const char *s2, size_t n);
+/*
+ * Output the local character set name, but make sure it is suitable for
+ * 8-bit characters.
+ */
+char *write_charset_8bit (void);

 
 
 /*
 
 
 /*


@@ -211,7 +443,6 @@ char *SystemName(void);
 int annotate (char *, char *, char *, int, int, int, int);
 void annolist(char *, char *, char *, int);
 void annopreserve(int);
 int annotate (char *, char *, char *, int, int, int, int);
 void annolist(char *, char *, char *, int);
 void annopreserve(int);

-void clear_screen(void);

 void m_pclose(void);
 int make_intermediates(char *);
 int mhl(int, char **);
 void m_pclose(void);
 int make_intermediates(char *);
 int mhl(int, char **);


@@ -219,15 +450,68 @@ int mhlsbr(int, char **, FILE *(*)(char *));
 int distout (char *, char *, char *);
 void replout (FILE *, char *, char *, struct msgs *, int,
        int, char *, char *, char *, int);
 int distout (char *, char *, char *);
 void replout (FILE *, char *, char *, struct msgs *, int,
        int, char *, char *, char *, int);

-int sc_hardcopy(void);

 int sc_length(void);
 int sc_width(void);
 int build_form (char *, char *, int *, char *, char *, char *, char *,
                char *, char *);
 int sc_length(void);
 int sc_width(void);
 int build_form (char *, char *, int *, char *, char *, char *, char *,
                char *, char *);

-int sendsbr (char **, int, char *, char *, struct stat *, int, char *, int);
+int sendsbr (char **, int, char *, char *, struct stat *, int, const char *);

 int SOprintf (char *, ...);
 int what_now (char *, int, int, char *, char *,
        int, struct msgs *, char *, int, char *, int);
 int WhatNow(int, char **);
 int SOprintf (char *, ...);
 int what_now (char *, int, int, char *, char *,
        int, struct msgs *, char *, int, char *, int);
 int WhatNow(int, char **);

-int writeBase64aux(FILE *, FILE *);
-int writeBase64 (unsigned char *, size_t, unsigned char *);
+
+/* Includes trailing NUL */
+
+#define BASE64SIZE(x) ((((x + 2) / 3) * 4) + 1)
+
+/*
+ * Copy data from one file to another, converting to base64-encoding.
+ *
+ * Arguments include:
+ *
+ * in          - Input filehandle (unencoded data)
+ * out         - Output filename (base64-encoded data)
+ * crlf                - If set, output encoded CRLF for every LF on input.
+ *
+ * Returns OK on success, NOTOK otherwise.
+ */
+int writeBase64aux(FILE *in, FILE *out, int crlf);
+
+int writeBase64 (const unsigned char *, size_t, unsigned char *);
+int writeBase64raw (const unsigned char *, size_t, unsigned char *);
+
+/*
+ * encoded      - the string to be decoded
+ * decoded      - the decoded bytes
+ * len          - number of decoded bytes
+ * skip-crs     - non-zero for text content, and for which CR's should be
+ *                skipped
+ * digest       - for an MD5 digest, it can be null
+ */
+int decodeBase64 (const char *encoded, unsigned char **decoded, size_t *len,
+                  int skip_crs, unsigned char *digest);
+
+void hexify (const unsigned char *, size_t, char **);
+
+/*
+ * credentials management
+ */
+void init_credentials_file ();
+int nmh_get_credentials (char *, char *, int, nmh_creds_t);
+
+/*
+ * program initialization
+ *
+ * argv0        - argv[0], presumably the program name
+ * read_context - 0: don't read context
+ *              - 1: read context, check nmh version, and issue warning message
+ *                   if non-existent or old
+ *              - 2: read context, don't check nmh version
+ */
+int nmh_init(const char *argv0, int read_context);
+
+/*
+ * temporary file management
+ */
+int m_unlink(const char *);
+void unregister_for_removal(int remove_files);