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1.1 root 1: /*
2: * misc.h
3: * Miscellaneous useful user functions.
4: * Sugggestions and additions are welcome.
5: */
6: #ifndef OFFSETOF
7:
8: /* Handy defines */
9: #define OFFSETOF(type, mem) (&((char *)((type *)NULL)->m) - NULL)
10: #define ENDOF(x) (((char *)(x))+sizeof(x)) /* end of some thing */
11: #define SETIN(a, b) !((a) & ~(b)) /* a in b */
12:
13: #ifdef M68000
14: #define ptrdiff(a, b) ((long)a - (long)b)
15: #else
16: #ifdef LARGE
17: #define ptrdiff(a, b) (((((long)a>>16)-((long)b>>16))<<4)+((int)a-(int)b))
18: #else
19: #define ptrdiff(a, b) ((int)a - (int)b)
20: #endif
21: #endif
22:
23: #include <stdio.h>
24:
25: /*
26: * Needed for select()
27: */
28: struct timeval {
29: long tv_sec;
30: long tv_usec;
31: };
32:
33: #include <sys/param.h>
34:
35: #if NOFILE <= 32
36: typedef int fd_set;
37:
38: #define FD_ZERO(fdp) {*fdp = 0;}
39: #define FD_SET(b,fdp) (*fdp |= 1 << (b))
40: #define FD_ISSET(b,fdp) (*fdp & 1 << (b))
41: #define FD_SETSIZE 32
42: #else
43: typedef int fd_set[2];
44:
45: #define FD_ZERO(fdp) {(*fdp)[0]=(*fdp)[1]=0;}
46: #define FD_SET(b,fdp) ((*fdp)[((b)>>5)&1] |= 1 << ((b)&0x1F))
47: #define FD_ISSET(b,fdp) ((*fdp)[((b)>>5)&1] & 1 << ((b)&0x1F))
48: #define FD_SETSIZE 64
49: #endif
50: /* end of select() support */
51:
52: extern fatal(); /* like fprintf(stderr, ...); exit(1); */
53: extern char * getline();/* char * getline(FILE *fp, int *lineNo);
54: * gets lines off a file treats # to end of line
55: * as comment, discards \ [ \t\n] through end of
56: * line to create continuations. */
57: extern usage(); /* like fatal but message starts usage: */
58: extern FILE *xopen(); /* xopen(filename, access); fopen or die */
59: extern char *basename(); /* return the last filename on a path */
60: extern char *pathn(); /* pathn("helpfile", "LIBPATH", ",,\lib", "r");
61: * gets full pathname given an filename
62: * env var with path, default path and access rights */
63: extern xdump(); /* xdump(ptr, size) hex dumps an area */
64: extern long randl(); /* IEEE random number (random bits) */
65: extern srandl(); /* srandl(unsigned long s1, s2); */
66: extern unsigned short crc16(); /* crc16(char *p) calculate 16 bit crc */
67: extern char *ask(); /* ask(reply, msg);
68: * like printf(msg, ...) returns a user reply */
69: extern int yn(); /* like printf(msg, ...) returns yes=1 or no=0 reply */
70: extern char *alloc(); /* get space or die */
71: extern void banner(); /* banner("Done", 3) prints a banner saying
72: * Done with 3 spaces infront. */
73: extern int copyd(); /* copyd(FILE *outfile, FILE *infile, long length)
74: * Copys infile to outfile for length efficiently.
75: * on failure copys all it can read and returns 0.
76: * returns 1 on success */
77: extern strcmpl(); /* case insensative strcmp() */
78: extern char *lcase(); /* convert string to lower case */
79: extern char *ucase(); /* convert string to upper case */
80: extern char *newcpy(); /* make a malloced copy of a string */
81: extern char *match(); /* match(s1, pat, fin)
82: * finds pat in s1 by pnmatch rules
83: * returns start of pattern or NULL
84: * places pointer to end in *fin
85: */
86: extern char *replace(); /* replace(s1, pat, s3, all, matcher)
87: * search s1 for pat and replace by s3.
88: * Using matcher which is a pointer to
89: * a function that looks externally like match.
90: * Returns a new malloced string or NULL
91: * does all if all != 0 else first. */
92: extern char * span(); /* span(s1, matcher, fin)
93: * matches all chars passing function
94: * matcher. Looks like match. */
95: extern char * skip(); /* skip(s1, matcher, fin)
96: * matches all chars not passing function
97: * matcher. Looks like match. */
98: extern void tocont(); /* Enter NL to continue */
99: extern approx(); /* approx(double a, double b) 1 if == within epsilon */
100: extern double epsilon;
101: extern int is_fs(); /* is_fs(char *special) test if special is filesystem */
102: extern void vinit(); /* vinit(char * workFileName, unsigned storAmt);
103: * Init the software virtual system telling it how much
104: * storage it may use for buffers */
105: extern void vshutdown(); /* Shut down the virtual system and free its storage */
106: extern unsigned vopen(); /* vopen(long amt); Set up a virtual object amt
107: * bytes long and return a vid number. */
108: extern char *vfind(); /* vfind(int vid, long disp, int dirty);
109: * Point to a byte disp bytes into vid, set the
110: * dirty bit if dirty == 1 */
111: extern char *trim(); /* trim(char *s); remove trailing whitespace from s */
112: extern void splitter(); /* splitter(FILE *ofp, char *line, int limit)
113: * split line into limit size chunks by inserting
114: * \ \n and put the results to ofp. */
115: extern strchrtr();
116: /* strchrtr(char *from, char *to, int c, int d)
117: * Find c in from and return the corresponding char
118: * in to or def if there is none.
119: */
120: /*
121: * Definitions etc. for regexp(3) routines.
122: *
123: * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
124: * not the System V one.
125: *
126: * This is a modification of the University of Toronto regexp() package.
127: * Mostly to fit in cleanly with Coherent's libmisc. The original can
128: * be gotten free on mwcbbs.
129: */
130: #define NSUBEXP 10
131: typedef struct regexp {
132: char *startp[NSUBEXP];
133: char *endp[NSUBEXP];
134: char regstart; /* Internal use only. */
135: char reganch; /* Internal use only. */
136: char *regmust; /* Internal use only. */
137: int regmlen; /* Internal use only. */
138: char program[1]; /* Unwarranted chumminess with compiler. */
139: } regexp;
140:
141: extern regexp *regcomp();
142: extern int regexec();
143: extern void regsub();
144: extern void regerror();
145: /*
146: * The first byte of the regexp internal "program" is actually this magic
147: * number; the start node begins in the second byte.
148: */
149: #define REG_MAGIC (char)0234
150: #endif
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