diff options
Diffstat (limited to 'urt/scanargs.c')
| -rw-r--r-- | urt/scanargs.c | 918 |
1 files changed, 0 insertions, 918 deletions
diff --git a/urt/scanargs.c b/urt/scanargs.c deleted file mode 100644 index f3af3342..00000000 --- a/urt/scanargs.c +++ /dev/null @@ -1,918 +0,0 @@ -/* - * $Id: scanargs.c,v 3.0.1.3 1992/02/27 21:18:14 spencer Exp $ - * Version 7 compatible - * Argument scanner, scans argv style argument list. - * - * Some stuff is a kludge because sscanf screws up - * - * Gary Newman - 10/4/1979 - Ampex Corp. - * - * Modified by Spencer W. Thomas, Univ. of Utah, 5/81 to - * add args introduced by a flag, add qscanargs call, - * allow empty flags. - * - * If you make improvements we'd like to get them too. - * Jay Lepreau lepreau@utah-20, decvax!harpo!utah-cs!lepreau - * Spencer Thomas thomas@utah-20, decvax!harpo!utah-cs!thomas - * - * (I know the code is ugly, but it just grew, you see ...) - * - * Modified by: Spencer W. Thomas - * Date: Feb 25 1983 - * 1. Fixed scanning of optional args. Now args introduced by a flag - * must follow the flag which introduces them and precede any other - * flag argument. It is still possible for a flag introduced - * argument to be mistaken for a "bare" argument which occurs - * earlier in the format string. This implies that flags may not - * be conditional upon other flags, and a message will be generated - * if this is attempted. - * - * 2. Usage message can be formatted by inserting newlines, tabs and - * spaces into the format string. This is especially useful for - * long argument lists. - * - * 3. Added n/N types for "numeric" args. These args are scanned - * using the C language conventions - a number starting 0x is - * hexadecimal, a number starting with 0 is octal, otherwise it is - * decimal. - * - * Modified at BRL 16-May-88 by Mike Muuss to avoid Alliant STDC desire - * to have all "void" functions so declared. - */ - -#include <stdio.h> -#include <ctype.h> -#include <stdarg.h> - -#include "netpbm/pm_c_util.h" -#include "netpbm/nstring.h" -#include "rle_config.h" -#include "rle.h" - -/* - * An explicit assumption is made in this code that all pointers look - * alike, except possible char * pointers. - */ -typedef int *ptr; - -#define YES 1 -#define NO 0 -#define ERROR(msg) {fprintf(stderr, "%s\n", msg); goto error; } - -/* - * Storage allocation macros - */ -#define NEW( type, cnt ) (type *) malloc( (cnt) * sizeof( type ) ) -#define RENEW( type, ptr, cnt ) (type *) realloc( ptr, (cnt) * sizeof( type ) ) - -static CONST_DECL char * prformat( CONST_DECL char *, int ); -static int isnum( CONST_DECL char *, int, int ); -static int _do_scanargs( int argc, char **argv, CONST_DECL char *format, - va_list argl ); -void scan_usage( char **, CONST_DECL char * ); - -/* - * Argument list is (argc, argv, format, ... ) - */ -int -scanargs ( int argc, char **argv, CONST_DECL char *format, ... ) -{ - va_list argl; - int retval; - va_start( argl, format ); - retval = _do_scanargs( argc, argv, format, argl ); - va_end( argl ); - return retval; -} - -/* - * This routine is necessary because of a pyramid compiler botch that - * uses parameter registers in a varargs routine. The extra - * subroutine call isolates the args on the register stack so they - * don't get trashed. - */ - -static int -_do_scanargs( argc, argv, format, argl ) -int argc; /* Actual arguments */ -char **argv; -CONST_DECL char *format; -va_list argl; -{ - - int check; /* check counter to be sure all argvs - are processed */ - register CONST_DECL char *cp; - int cnt; - int optarg = 0; /* where optional args start */ - int nopt = 0; - char tmpflg, /* temp flag */ - typchr; /* type char from format string */ - char c; - bool * arg_used; /* array of flags */ - ptr aptr = 0; /* pointer to return loc */ - - bool required; - int excnt; /* which flag is set */ - bool exflag; /* when set, one of a set of exclusive - flags is set */ - - bool list_of; /* set if parsing off a list of args */ - bool comma_list; /* set if AT&T style multiple args */ - bool no_usage; /* If set, don't print usage msg. */ - bool help = NO; /* If set, always print usage. */ - int * cnt_arg = 0; /* where to stuff list count */ - int list_cnt; /* how many in list */ - /* These are used to build return lists */ - char ** strlist = 0; - int * intlist = 0; - long * longlist = 0; - float * fltlist = 0; - double *dbllist = 0; - char * argp; /* Pointer to argument. */ - - CONST_DECL char *ncp; /* remember cp during flag scanning */ - static char cntrl[7] = "% %1s"; /* control string for scanf's */ - char junk[2]; /* junk buffer for scanf's */ - - /* Set up for argument counting. */ - arg_used = NEW( bool, argc ); - if (arg_used == NULL) - { - fprintf(stderr, "malloc failed in scanargs, exiting\n"); - exit(-1); - } - else - { - for (cnt=0; cnt<argc; cnt++) - arg_used[cnt] = NO; - } - check = 0; - - /* Scan for -help in arg list. */ - for ( cnt=1; cnt<argc; cnt++ ) - if ( strcmp( argv[cnt], "-help" ) == 0 ) - { - check += cnt; - arg_used[cnt] = YES; - if ( argc == 2 ) - { - scan_usage( argv, format ); - return 0; - } - else - help = YES; - } - - /* If format string ends in @, don't print a usage message. */ - no_usage = *(format + strlen( format ) - 1) == '&'; - - cp = format; - /* - * Skip program name - */ - while ( *cp != ' ' && *cp != '\t' && *cp != '\n' && *cp != '\0' ) - cp++; - - while (*cp) - { - required = NO; /* reset per-arg flags */ - list_of = NO; - comma_list = NO; - list_cnt = 0; - switch (*(cp++)) - { - default: /* all other chars */ - break; - case ' ': /* separators */ - case '\t': - case '\n': - optarg = 0; /* end of optional arg string */ - break; - - case '(': /* Surrounds a comment. */ - { - int depth = 1; /* Count parenthesis depth. */ - while ( *cp && depth > 0 ) - switch ( *(cp++) ) - { - case '(': depth++; break; - case ')': depth--; break; - } - break; - } - - case '!': /* required argument */ - required = YES; - case '%': /* not required argument */ -reswitch: /* after finding '*' or ',' */ - switch (typchr = *(cp++)) - { - case ',': /* argument is AT&T list of things */ - comma_list = YES; - case '*': /* argument is list of things */ - list_of = YES; - list_cnt = 0; /* none yet */ - cnt_arg = va_arg( argl, int *); /* item count * here */ - goto reswitch; /* try again */ - - case '$': /* "rest" of argument list */ - while ( argc > 1 && !arg_used[argc-1] ) - argc--; /* find last used argument */ - *va_arg( argl, int * ) = argc; - break; - - case '&': /* Return unused args. */ - /* Count how many. Always include argv[0]. */ - for ( nopt = cnt = 1; cnt < argc; cnt++ ) - if ( !arg_used[cnt] ) - nopt++; - if ( nopt == 1 ) - nopt = 0; /* Special case for no args. */ - if ( nopt > 0 ) - { - strlist = NEW( char *, nopt + 1 ); - /* Copy program name, for sure. */ - strlist[0] = argv[0]; - for ( nopt = cnt = 1; cnt < argc; cnt++ ) - if ( !arg_used[cnt] ) - { - strlist[nopt++] = argv[cnt]; - check += cnt; - arg_used[cnt] = 1; - } - strlist[nopt] = NULL; - } - else - strlist = NULL; /* No args, return empty. */ - - /* Return count and arg list. */ - *va_arg( argl, int * ) = nopt; - *va_arg( argl, char *** ) = strlist; - break; - - case '-': /* argument is flag */ - if (optarg > 0) - ERROR("Format error: flag conditional on flag not allowed"); - - /* go back to label */ - ncp = cp-1; /* remember */ - cp -= 3; - for (excnt = exflag = 0 - ; *cp != ' ' && !(*cp=='-' &&(cp[-1]=='!'||cp[-1]=='%')); - (--cp, excnt++)) - { - for (cnt = optarg+1; cnt < argc; cnt++) - { - /* flags all start with - */ - if (*argv[cnt] == '-' && !arg_used[cnt] && - !ISDIGIT(argv[cnt][1])) - if (*(argv[cnt] + 1) == *cp) - { - if (*(argv[cnt] + 2) != 0) - ERROR ("extra flags ignored"); - if (exflag) - ERROR ("more than one exclusive flag chosen"); - exflag++; - required = NO; - check += cnt; - arg_used[cnt] = 1; - nopt = cnt; - *va_arg( argl, int *) |= (1 << excnt); - break; - } - } - } - if (required) - ERROR ("flag argument missing"); - cp = ncp; - /* - * If none of these flags were found, skip any - * optional arguments (in the varargs list, too). - */ - if (!exflag) - { - (void)va_arg( argl, int * );/* skip the arg, too */ - while (*++cp && ! ISSPACE(*cp)) - if (*cp == '!' || *cp == '%') - { - if ( *++cp == '*' || *cp == ',' ) - { - cp++; - (void)va_arg( argl, int * ); - } - /* - * Assume that char * might be a - * different size, but that all - * other pointers are same size. - */ - if ( *cp == 's' ) - (void)va_arg( argl, char * ); - else - (void)va_arg( argl, ptr ); - } - } - else - { - optarg = nopt; - cp++; /* skip over - */ - } - - break; - - case 's': /* char string */ - case 'd': /* decimal # */ - case 'o': /* octal # */ - case 'x': /* hexadecimal # */ - case 'n': /* "number" in C syntax */ - case 'f': /* floating # */ - case 'D': /* long decimal # */ - case 'O': /* long octal # */ - case 'X': /* long hexadecimal # */ - case 'N': /* long number in C syntax */ - case 'F': /* double precision floating # */ -#if defined(sgi) && !defined(mips) - /* Fix for broken SGI IRIS 2400/3000 floats */ - if ( typchr == 'F' ) typchr = 'f'; -#endif /* sgi */ - for (cnt = optarg+1; cnt < argc; cnt++) - { - argp = argv[cnt]; - - if ( isnum( argp, typchr, comma_list ) ) - { - ; /* it's ok, then */ - } - else if ( *argp == '-' && argp[1] != '\0' ) - if ( optarg > 0 ) /* end optional args? */ - { - /* Eat the arg, too, if necessary */ - if ( list_cnt == 0 ) { - if ( typchr == 's' ) - (void)va_arg( argl, char * ); - else - (void)va_arg( argl, ptr ); - } - break; - } - else - continue; - else if ( typchr != 's' ) - continue; /* not number, keep looking */ - - /* - * Otherwise usable argument may already - * be used. (Must check this after - * checking for flag, though.) - */ - if (arg_used[cnt]) continue; - - /* - * If it's a comma-and-or-space-separated - * list then count how many, and separate - * the list into an array of strings. - */ - if ( comma_list ) - { - register char * s; - int pass; - - /* - * Copy the string so we remain nondestructive - */ - s = NEW( char, strlen(argp)+1 ); - strcpy( s, argp ); - argp = s; - - /* - * On pass 0, just count them. On - * pass 1, null terminate each string - */ - for ( pass = 0; pass <= 1; pass++ ) - { - for ( s = argp; *s != '\0'; ) - { - if ( pass ) - strlist[list_cnt] = s; - while ( (c = *s) != '\0' && c != ' ' && - c != '\t' && c != ',' ) - s++; - if ( pass ) - *s = '\0'; - - list_cnt++; /* count separators */ - /* - * Two commas in a row give a null - * string, but two spaces - * don't. Also skip spaces - * after a comma. - */ - if ( c != '\0' ) - while ( *++s == ' ' || *s == '\t' ) - ; - } - if ( pass == 0 ) - { - strlist = NEW( char *, list_cnt ); - list_cnt = 0; - } - } - } - else if ( list_of ) - list_cnt++; /* getting them one at a time */ - /* - * If it's either type of list, then alloc - * storage space for the returned values - * (except that comma-separated string - * lists already are done). - */ - if ( list_of ) - { - if ( list_cnt == 1 || comma_list ) - switch( typchr ) - { - case 's': - if ( !comma_list ) - strlist = NEW( char *, 1 ); - aptr = (ptr) &strlist[0]; - break; - case 'n': - case 'd': - case 'o': - case 'x': - intlist = NEW( int, list_cnt ); - aptr = (ptr) &intlist[0]; - break; - case 'N': - case 'D': - case 'O': - case 'X': - longlist = NEW( long, list_cnt ); - aptr = (ptr) &longlist[0]; - break; - case 'f': - fltlist = NEW( float, list_cnt ); - aptr = (ptr) &fltlist[0]; - break; - case 'F': - dbllist = NEW( double, list_cnt ); - aptr = (ptr) &dbllist[0]; - break; - } - else - switch( typchr ) - { - case 's': - strlist = RENEW( char *, strlist, - list_cnt ); - aptr = (ptr) &strlist[list_cnt-1]; - break; - case 'n': - case 'd': - case 'o': - case 'x': - intlist = RENEW( int, intlist, - list_cnt ); - aptr = (ptr) &intlist[list_cnt-1]; - break; - case 'N': - case 'D': - case 'O': - case 'X': - longlist = RENEW( long, longlist, - list_cnt ); - aptr = (ptr) &longlist[list_cnt-1]; - break; - case 'f': - fltlist = RENEW( float, fltlist, - list_cnt ); - aptr = (ptr) &fltlist[list_cnt-1]; - break; - case 'F': - dbllist = RENEW( double, dbllist, - list_cnt ); - aptr = (ptr) &dbllist[list_cnt-1]; - break; - } - } - else - aptr = va_arg( argl, ptr ); - - if ( typchr == 's' ) - { - if ( ! comma_list ) - *(char **)aptr = argp; - } - else - { - nopt = 0; - do { - /* - * Need to update aptr if parsing - * a comma list - */ - if ( comma_list && nopt > 0 ) - { - argp = strlist[nopt]; - switch( typchr ) - { - case 'n': - case 'd': - case 'o': - case 'x': - aptr = (ptr) &intlist[nopt]; - break; - case 'N': - case 'D': - case 'O': - case 'X': - aptr = (ptr) &longlist[nopt]; - break; - case 'f': - aptr = (ptr) &fltlist[nopt]; - break; - case 'F': - aptr = (ptr) &dbllist[nopt]; - break; - } - } - /* - * Do conversion for n and N types - */ - tmpflg = typchr; - if (typchr == 'n' || typchr == 'N' ) { - if (*argp != '0') - tmpflg = 'd'; - else if (*(argp+1) == 'x' || - *(argp+1) == 'X') - { - tmpflg = 'x'; - argp += 2; - } - else - tmpflg = 'o'; - } - if (typchr == 'N') - tmpflg = toupper( tmpflg ); - - - /* put in conversion */ - if ( isupper( tmpflg ) ) - { - cntrl[1] = 'l'; - cntrl[2] = tolower( tmpflg ); - } - else - { - cntrl[1] = tmpflg; - cntrl[2] = ' '; - } - if (sscanf (argp, cntrl, aptr, junk) != 1) - ERROR ("Bad numeric argument"); - } while ( comma_list && ++nopt < list_cnt ); - } - check += cnt; - arg_used[cnt] = 1; - required = NO; - /* - * If not looking for multiple args, - * then done, otherwise, keep looking. - */ - if ( !( list_of && !comma_list ) ) - break; - else - continue; - } - if (required) - switch (typchr) - { - case 'x': - case 'X': - ERROR ("missing hexadecimal argument"); - case 's': - ERROR ("missing string argument"); - case 'o': - case 'O': - ERROR ("missing octal argument"); - case 'd': - case 'D': - ERROR ("missing decimal argument"); - case 'f': - case 'F': - ERROR ("missing floating argument"); - case 'n': - case 'N': - ERROR ("missing numeric argument"); - } - if ( list_cnt > 0 ) - { - *cnt_arg = list_cnt; - switch ( typchr ) - { - case 's': - *va_arg( argl, char *** ) = strlist; - break; - case 'n': - case 'd': - case 'o': - case 'x': - *va_arg( argl, int ** ) = intlist; - break; - case 'N': - case 'D': - case 'O': - case 'X': - *va_arg( argl, long ** ) = longlist; - break; - case 'f': - *va_arg( argl, float ** ) = fltlist; - break; - case 'F': - *va_arg( argl, double **) = dbllist; - break; - } - if ( typchr != 's' && comma_list ) - free( (char *) strlist ); - } - else if ( cnt >= argc ) - { - /* Fell off end looking, so must eat the arg */ - if ( typchr == 's' ) - (void)va_arg( argl, char * ); - else - (void)va_arg( argl, ptr ); - } - break; - default: /* error */ - fprintf (stderr, - "scanargs: Corrupt or invalid format spec\n"); - return 0; - } - } - } - - /* Count up empty flags */ - for (cnt=1; cnt<argc; cnt++) - if (argv[cnt][0] == '-' && argv[cnt][1] == '-' && argv[cnt][2] == 0 - && !arg_used[cnt] ) - check += cnt; - - /* sum from 1 to N = n*(n+1)/2 used to count up checks */ - if (check != (((argc - 1) * argc) / 2)) - ERROR ("extra arguments not processed"); - - /* If -help, always print usage. */ - if ( help ) - scan_usage( argv, format ); - - free(arg_used); - return 1; - -error: - if ( !no_usage ) - scan_usage( argv, format ); - free(arg_used); - return 0; -} - -void -scan_usage( argv, format ) -char ** argv; -CONST_DECL char * format; -{ - register CONST_DECL char * cp; - - fprintf (stderr, "usage : "); - if (*(cp = format) != ' ') - { - if ( *cp == '%' ) - { - /* - * This is bogus, but until everyone can agree on a name - * for (rindex/strrchr) .... - */ - for ( cp = argv[0]; *cp != '\0'; cp++ ) - ; /* find the end of the string */ - for ( ; cp > argv[0] && *cp != '/'; cp-- ) - ; /* find the last / */ - if ( *cp == '/' ) - cp++; - fprintf( stderr, "%s", cp ); - - cp = format + 1; /* reset to where it should be */ - } - while (putc (*cp++, stderr) != ' '); - } - else - fprintf (stderr, "?? "); - while (*cp == ' ') - cp++; - (void)prformat (cp, NO); -} - -static CONST_DECL char * -prformat (format, recurse) -CONST_DECL char *format; -int recurse; -{ - register CONST_DECL char *cp; - bool required, comma_list; - int list_of, depth; - - cp = format; - if (recurse) - putc (' ', stderr); - - required = NO; - list_of = 0; - comma_list = NO; - while (*cp) - { - switch (*cp) - { - default: - cp++; - break; - case ' ': - case '\n': - case '\t': - /* allow annotations */ - for ( ; format < cp; format++ ) - putc( *format, stderr ); - putc(*cp, stderr); - format = ++cp; - break; - - case '(': - /* Parentheses surround an arbitrary (parenthesis - * balanced) comment. - */ - for ( ; format < cp; format++ ) - putc( *format, stderr ); - for ( cp++, depth = 1; *cp && depth > 0; ) - { - /* Don't print last close paren. */ - if ( *cp != ')' || depth > 1 ) - putc( *cp, stderr ); - switch( *(cp++) ) - { - case '(': depth++; break; - case ')': depth--; break; - } - } - format = cp; - break; - - case '!': - required = YES; - case '%': -reswitch: - switch (*++cp) - { - case ',': - comma_list++; - case '*': - list_of++; - goto reswitch; - - case '$': /* "rest" of argument list */ - if (!required) - putc ('[', stderr); - for (; format < cp - 1 - list_of; format++) - putc (*format, stderr); - fputs( " ...", stderr ); - if ( !required ) - putc( ']', stderr ); - break; - - case '-': /* flags */ - if (!required) - putc ('[', stderr); - putc ('-', stderr); - - if (cp - format > 2 + list_of) - putc ('{', stderr); - cp = format; - while (*cp != '%' && *cp != '!') - putc (*cp++, stderr); - if (cp - format > 1 + list_of) - putc ('}', stderr); - cp += 2; /* skip !- or %- */ - if (*cp && !ISSPACE(*cp)) - cp = prformat (cp, YES); - /* this is a recursive call */ - - cp--; /* don't ignore next character */ - - if (!required) - putc (']', stderr); - break; - case 's': /* char string */ - case 'd': /* decimal # */ - case 'o': /* octal # */ - case 'x': /* hexadecimal # */ - case 'f': /* floating # */ - case 'D': /* long decimal # */ - case 'O': /* long octal # */ - case 'X': /* long hexadecimal # */ - case 'F': /* double precision floating # */ - case 'n': /* numeric arg (C format) */ - case 'N': /* long numeric arg */ - if (!required) - putc ('[', stderr); - for (; format < cp - 1 - list_of; format++) - putc (*format, stderr); - if ( list_of != 0 ) - { - if ( comma_list ) - putc( ',', stderr ); - else - putc( ' ', stderr ); - fputs( "...", stderr ); - } - if (!required) - putc (']', stderr); - break; - default: - break; - } - required = NO; - list_of = NO; - comma_list = NO; - if (*cp) /* check for end of string */ - format = ++cp; - if (*cp && !ISSPACE(*cp)) - putc (' ', stderr); - } - if (recurse && ISSPACE(*cp)) - break; - } - if (!recurse) - { - for ( ; format < cp; format++ ) - putc( *format, stderr ); - putc ('\n', stderr); - } - return (cp); -} - -/* - * isnum - determine whether a string MIGHT represent a number. - * typchr indicates the type of argument we are looking for, and - * determines the legal character set. If comma_list is YES, then - * space and comma are also legal characters. - */ -static int -isnum( str, typchr, comma_list ) -register CONST_DECL char * str; -int typchr; -int comma_list; -{ - register CONST_DECL char *allowed, *digits, *cp; - int hasdigit = NO; - - switch( typchr ) - { - case 'n': - case 'N': - allowed = " \t,+-x0123456789abcdefABCDEF"; - break; - case 'd': - case 'D': - allowed = " \t,+-0123456789"; - break; - case 'o': - case 'O': - allowed = " \t,01234567"; - break; - case 'x': - case 'X': - allowed = " \t,0123456789abcdefABCDEF"; - break; - case 'f': - case 'F': - allowed = " \t,+-eE.0123456789"; - break; - case 's': /* only throw out decimal numbers */ - default: - allowed = " \t,+-.0123456789"; - break; - } - digits = allowed; - while ( *digits != '0' ) - digits++; - if ( ! comma_list ) - allowed += 3; /* then don't allow space, tab, comma */ - - while ( *str != '\0' ) - { - for ( cp = allowed; *cp != '\0' && *cp != *str; cp++ ) - ; - if ( *cp == '\0' ) - return NO; /* if not in allowed chars, not number */ - if ( cp - digits >= 0 ) - hasdigit = YES; - str++; - } - return hasdigit; -} |