formatsbr.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

/* formatsbr.c - format string interpretation */

#include "../h/mh.h"
#include "../h/addrsbr.h"
#include "../h/formatsbr.h"
#include "../zotnet/tws.h"
#include "../h/fmtcompile.h"
#include <ctype.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>

/*  */


#define	NFMTS	MAXARGS
#define QUOTE '\\'

static char  *formats = 0;
extern char *formataddr ();	/* hook for custom address formatting */
#ifdef	VAN
struct msgs *fmt_current_folder; /* current folder (set by main program) */
#endif

static normalize();
static char *address_break_point();

int	fmt_norm = AD_NAME;
struct mailname fmt_mnull;


long	time ();

/*  */

/* MAJOR HACK:	See MHCHANGES for discussion */

char  *new_fs (form, format, def)
register char  *form,
               *format,
               *def;
{
    struct stat st;
    register    FILE *fp;

    if (formats)
	free (formats);

    if (form) {
	if ((fp = fopen (libpath (form), "r")) == NULL)
	    adios (form, "unable to open format file");

	if (fstat (fileno (fp), &st) == NOTOK)
	    adios (form, "unable to stat format file");

	if ((formats = malloc ((unsigned) st.st_size + 1)) == NULLCP)
	    adios (form, "unable to allocate space for format");

	if (read (fileno(fp), formats, st.st_size) != st.st_size)
	    adios (form, "error reading format file");

	formats[st.st_size] = '\0';

	(void) fclose (fp);
    }
    else {
	formats = getcpy (format ? format : def);
    }

    normalize (formats);

    return formats;
}

/*  */

static  normalize (cp)
register char  *cp;
{
    register char  *dp;

    for (dp = cp; *cp; cp++)
	if (*cp != QUOTE)
	    *dp++ = *cp;
	else
	    switch (*++cp) {
#define	grot(y,z) case y: *dp++ = z; break;
		grot ('b', '\b');
		grot ('f', '\f');
		grot ('n', '\n');
		grot ('r', '\r');
		grot ('t', '\t');

		case '\n':
		    break;

		case NULL: 
		    cp--;	/* fall */
		default: 
		    *dp++ = *cp;
		    break;
	    }

    *dp = NULL;
}

/*  */
/*
 * test if string "sub" appears anywhere in string "str"
 * (case insensitive).
 */

static int match (str, sub)
register char  *str,
               *sub;
{
    register int    c1;
    register int    c2;
    register char   *s1;
    register char   *s2;

    while (c1 = *sub) {
	while ((c2 = *str++) && (c1 | 040) != (c2 | 040))
	    ;
	if (! c2)
	    return 0;
	s1 = sub + 1; s2 = str;
	while ((c1 = *s1++) && (c1 | 040) == (*s2++ | 040))
	    ;
	if (! c1)
	    return 1;
    }
    return 1;
}
/*  */

/* macros to format data */

#define PUTDF(cp, num, wid, fill) if (cp + wid < ep){\
		if((i = (num))<0) i = -(num);\
		if((c = (wid))<0) c = -c;\
		sp = cp + c;\
		do {\
		    *--sp = (i % 10) + '0';\
		    i /= 10;\
		} while (i > 0 && sp > cp);\
		if (i > 0)\
		    *sp = '?';\
		else if ((num) < 0 && sp > cp)\
		    *--sp = '-';\
		while (sp > cp)\
		    *--sp = fill;\
		cp += c;\
		}
#define PUTD(cp, num) if (cp < ep){\
		if((i = (num))==0) *cp++ = '0';\
		else {\
		    if((i = (num))<0) \
			*cp++ = '-', i = -(num);\
		    c = 10;\
		    while (c <= i) \
			c *= 10;\
		    while (cp < ep && c > 1) {\
			c /= 10;\
			*cp++ = (i / c) + '0';\
			i %= c;\
			}\
		    }\
		}
#define PUTSF(cp, str, wid, fill) {\
		ljust = 0;\
		if ((i = (wid)) < 0) {\
			i = -i;\
			ljust++;\
		}\
		if (sp = (str)) {\
			if (ljust) {\
				c = strlen(sp);\
				if (c > i)\
					sp += c - i;\
				else {\
					while( --i >= c && cp < ep)\
						*cp++ = fill;\
					i++;\
				}\
			} else {\
		    while ((c = *sp) && c <= 32)\
			sp++;\
			}\
			while ((c = *sp++) && --i >= 0 && cp < ep)\
				if (c > 32) \
			    *cp++ = c;\
			else {\
					while ((c = *sp) && c <= 32)\
				sp++;\
			    *cp++ = ' ';\
			}\
		}\
		if (!ljust)\
		while( --i >= 0 && cp < ep)\
		    *cp++ = fill;\
		}
#define PUTS(cp, str) {\
		if (sp = (str)) {\
		    while ((c = *sp) && c <= 32)\
			sp++;\
		    while( (c = *sp++) && cp < ep)\
			if ( c > 32 ) \
			    *cp++ = c;\
			else {\
			    while ( (c = *sp) && c <= 32 )\
				sp++;\
			    *cp++ = ' ';\
			}\
		}\
		}


static char *lmonth[] = { "January",  "February","March",   "April",
			  "May",      "June",    "July",    "August",
			  "September","October", "November","December" };


fmtscan (format, scanl, width, dat)
	struct format *format;
	char	*scanl;
	int	width;
	int	dat[];
{
    register char	*cp = scanl;
    register char	*ep = scanl + width - 1;
    register struct format *fmt = format;
    register char	*str = NULLCP;
    register int	value = 0;
    register char	*sp;
    register int	i;
    register int	c;
    register struct comp *comp;
    register struct tws *tws;
    register struct mailname *mn;
    int ljust;
    long l;
    char        *savestr;
    char	buffer[BUFSIZ];

    while (cp < ep) {
	switch (fmt->f_type) {

	case FT_COMP:
	    PUTS (cp, fmt->f_comp->c_text);
	    break;
	case FT_COMPF:
	    PUTSF (cp, fmt->f_comp->c_text, fmt->f_width, fmt->f_fill);
	    break;

	case FT_LIT:
	    sp = fmt->f_text;
	    while( (c = *sp++) && cp < ep)
		*cp++ = c;
	    break;
	case FT_LITF:
	    sp = fmt->f_text;
	    ljust = 0;
	    i = fmt->f_width;
	    if (i < 0) {
		i = -i;
		ljust++;		/* XXX should do something with this */
	    }
	    while( (c = *sp++) && --i >= 0 && cp < ep)
		*cp++ = c;
	    while( --i >= 0 && cp < ep)
		*cp++ = fmt->f_fill;
	    break;

	case FT_STR:
	    PUTS (cp, str);
	    break;
	case FT_STRF:
	    PUTSF (cp, str, fmt->f_width, fmt->f_fill);
	    break;
	case FT_STRFW:
	    adios (NULLCP, "internal error (FT_STRFW)");

	case FT_NUM:
	    PUTD (cp, value);
	    break;
	case FT_NUMF:
	    PUTDF (cp, value, fmt->f_width, fmt->f_fill);
	    break;

	case FT_CHAR:
	    *cp++ = fmt->f_char;
	    break;

	case FT_DONE:
	    goto finished;

	case FT_IF_S:
	    if (str == NULLCP || *str == NULL) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_IF_S_NULL:
	    if (str != NULLCP && *str != NULL) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_IF_V_EQ:
	    if (value != fmt->f_value) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_IF_V_NE:
	    if (value == fmt->f_value) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_IF_V_GT:
	    if (value <= fmt->f_value) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_IF_MATCH:
	    if (!str || !match (str, fmt->f_text)) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_V_MATCH:
	    if (str)
	    value = match (str, fmt->f_text);
	    else
		value = 0;
	    break;

	case FT_IF_AMATCH:
	    if (!str || !uprf (str, fmt->f_text)) {
		fmt += fmt->f_skip;
		continue;
	    }
	    break;

	case FT_V_AMATCH:
	    value = uprf (str, fmt->f_text);
	    break;

	case FT_S_NONNULL:
	    value = (str != NULLCP && *str != NULL);
	    break;

	case FT_S_NULL:
	    value = (str == NULLCP || *str == NULL);
	    break;

	case FT_V_EQ:
	    value = (fmt->f_value == value);
	    break;

	case FT_V_NE:
	    value = (fmt->f_value != value);
	    break;

	case FT_V_GT:
	    value = (fmt->f_value > value);
	    break;

	case FT_GOTO:
	    fmt += fmt->f_skip;
	    continue;

	case FT_NOP:
	    break;

	case FT_LS_COMP:
	    str = fmt->f_comp->c_text;
	    break;
	case FT_LS_LIT:
	    str = fmt->f_text;
	    break;
	case FT_LS_TRIM:
	    if (str) {
		    register char *xp;

		    (void) strcpy(buffer, str);
		    str = buffer;
		    while (isspace(*str))
			    str++;
		    ljust = 0;
		    if ((i = fmt->f_width) < 0) {
			    i = -i;
			    ljust++;	/* XXX should do something with this */
		    }

		    if (i > 0 && strlen(str) > i)
			    str[i] = '\0';
		    xp = str;
		    xp += strlen(str) - 1;
		    while (xp > str && isspace(*xp))
			    *xp-- = '\0';
	    }
	    break;

	case FT_LV_COMPFLAG:
	    value = fmt->f_comp->c_flags;
	    break;
	case FT_LV_COMP:
	    value = (comp = fmt->f_comp)->c_text ? atoi(comp->c_text) : 0;
	    break;
	case FT_LV_LIT:
	    value = fmt->f_value;
	    break;
	case FT_LV_DAT: