Annotation of libwww/Library/src/HTUtils.html, revision 2.7
2.6 timbl 1: <HTML>
2: <HEAD>
2.3 timbl 3: <TITLE>Utitlity macros for the W3 code library</TITLE>
2.6 timbl 4: <NEXTID N="z2">
5: </HEAD>
2.3 timbl 6: <BODY>
7: <H1>Macros for general use</H1>Generates: <A
2.6 timbl 8: NAME="z1" HREF="HTUtils.h">HTUtils.h</A><P>
2.3 timbl 9: See also: the system dependent file<A
2.6 timbl 10: NAME="z0" HREF="tcp.html">
2.3 timbl 11: "tcp.h"</A>
2.1 timbl 12: <PRE>
13: #ifndef DEBUG
14: #define DEBUG /* Noone ever turns this off as trace is too important */
15: #endif /* Keeep option for really small memory applications tho */
16:
17: #ifndef HTUTILS_H
18: #define HTUTILS_H
19:
2.3 timbl 20: #ifdef _WINDOWS /* SCW */
21: #include "windef.h"
22: #define BOOLEAN_DEFINED
23: #endif
24:
2.1 timbl 25: #ifdef SHORT_NAMES
26: #define WWW_TraceFlag HTTrFlag
27: #endif
28:
2.3 timbl 29: </PRE>
30: <H2>Debug message control.</H2>
31: <PRE>#ifndef STDIO_H
32: #include <stdio.h>
2.1 timbl 33: #define STDIO_H
34: #endif
35:
36: #ifdef DEBUG
37: #define TRACE (WWW_TraceFlag)
38: #define PROGRESS(str) printf(str)
39: extern int WWW_TraceFlag;
40: #else
41: #define TRACE 0
42: #define PROGRESS(str) /* nothing for now */
43: #endif
44:
45: #define CTRACE if(TRACE)fprintf
2.5 timbl 46: #define tfp stderr
2.1 timbl 47:
2.6 timbl 48: </PRE>
49: <H3>Error type</H3>This is passed back when streams
50: are aborted. It might be nice to
51: have some structure of error messages,
52: numbers, and recursive pointers to
53: reasons. Curently this is a placeholder
54: for something more sophisticated.
55: <PRE>typedef void * HTError; /* Unused at present -- best definition? */
2.1 timbl 56:
2.3 timbl 57: </PRE>
58: <H2>Standard C library for malloc() etc</H2>
59: <PRE>#ifdef vax
2.1 timbl 60: #ifdef unix
61: #define ultrix /* Assume vax+unix=ultrix */
62: #endif
63: #endif
64:
65: #ifndef VMS
66: #ifndef ultrix
67: #ifdef NeXT
2.3 timbl 68: #include <libc.h> /* NeXT */
2.1 timbl 69: #endif
70: #ifndef MACH /* Vincent.Cate@furmint.nectar.cs.cmu.edu */
2.3 timbl 71: #include <stdlib.h> /* ANSI */
2.1 timbl 72: #endif
73: #else /* ultrix */
2.3 timbl 74: #include <malloc.h>
75: #include <memory.h>
76: #include <stdio.h>
2.1 timbl 77: #endif
78:
79: #else /* VMS */
2.3 timbl 80: #include <stdio.h>
81: #include <ctype.h>
2.1 timbl 82: #endif
83:
2.3 timbl 84: </PRE>
85: <H2>Macros for declarations</H2>
86: <PRE>#define PUBLIC /* Accessible outside this module */
2.1 timbl 87: #define PRIVATE static /* Accessible only within this module */
88:
89: #ifdef __STDC__
90: #define CONST const /* "const" only exists in STDC */
91: #define NOPARAMS (void)
92: #define PARAMS(parameter_list) parameter_list
93: #define NOARGS (void)
94: #define ARGS1(t,a) \
95: (t a)
96: #define ARGS2(t,a,u,b) \
97: (t a, u b)
98: #define ARGS3(t,a,u,b,v,c) \
99: (t a, u b, v c)
100: #define ARGS4(t,a,u,b,v,c,w,d) \
101: (t a, u b, v c, w d)
102: #define ARGS5(t,a,u,b,v,c,w,d,x,e) \
103: (t a, u b, v c, w d, x e)
104: #define ARGS6(t,a,u,b,v,c,w,d,x,e,y,f) \
105: (t a, u b, v c, w d, x e, y f)
106: #define ARGS7(t,a,u,b,v,c,w,d,x,e,y,f,z,g) \
107: (t a, u b, v c, w d, x e, y f, z g)
108: #define ARGS8(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h) \
109: (t a, u b, v c, w d, x e, y f, z g, s h)
110: #define ARGS9(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i) \
111: (t a, u b, v c, w d, x e, y f, z g, s h, r i)
112: #define ARGS10(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i,q,j) \
113: (t a, u b, v c, w d, x e, y f, z g, s h, r i, q j)
114:
115: #else /* not ANSI */
116:
2.3 timbl 117: #ifndef _WINDOWS
2.1 timbl 118: #define CONST
2.3 timbl 119: #endif
2.1 timbl 120: #define NOPARAMS ()
121: #define PARAMS(parameter_list) ()
122: #define NOARGS ()
123: #define ARGS1(t,a) (a) \
124: t a;
125: #define ARGS2(t,a,u,b) (a,b) \
126: t a; u b;
127: #define ARGS3(t,a,u,b,v,c) (a,b,c) \
128: t a; u b; v c;
129: #define ARGS4(t,a,u,b,v,c,w,d) (a,b,c,d) \
130: t a; u b; v c; w d;
131: #define ARGS5(t,a,u,b,v,c,w,d,x,e) (a,b,c,d,e) \
132: t a; u b; v c; w d; x e;
133: #define ARGS6(t,a,u,b,v,c,w,d,x,e,y,f) (a,b,c,d,e,f) \
134: t a; u b; v c; w d; x e; y f;
135: #define ARGS7(t,a,u,b,v,c,w,d,x,e,y,f,z,g) (a,b,c,d,e,f,g) \
136: t a; u b; v c; w d; x e; y f; z g;
137: #define ARGS8(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h) (a,b,c,d,e,f,g,h) \
138: t a; u b; v c; w d; x e; y f; z g; s h;
139: #define ARGS9(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i) (a,b,c,d,e,f,g,h,i) \
140: t a; u b; v c; w d; x e; y f; z g; s h; r i;
141: #define ARGS10(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i,q,j) (a,b,c,d,e,f,g,h,i,j) \
2.4 timbl 142: t a; u b; v c; w d; x e; y f; z g; s h; r i; q j;
2.1 timbl 143:
144:
145: #endif /* __STDC__ (ANSI) */
146:
147: #ifndef NULL
148: #define NULL ((void *)0)
149: #endif
150:
2.3 timbl 151: </PRE>
152: <H2>Booleans</H2>
153: <PRE>/* Note: GOOD and BAD are already defined (differently) on RS6000 aix */
154: /* #define GOOD(status) ((status)38;1) VMS style status: test bit 0 */
2.1 timbl 155: /* #define BAD(status) (!GOOD(status)) Bit 0 set if OK, otherwise clear */
156:
2.3 timbl 157: #ifndef _WINDOWS
2.1 timbl 158: #ifndef BOOLEAN_DEFINED
159: typedef char BOOLEAN; /* Logical value */
160: #ifndef CURSES
161: #ifndef TRUE
162: #define TRUE (BOOLEAN)1
163: #define FALSE (BOOLEAN)0
164: #endif
2.3 timbl 165: #endif /* CURSES */
166: #endif /* _WINDOWS */
2.1 timbl 167: #define BOOLEAN_DEFINED
168: #endif
169:
170: #ifndef BOOL
171: #define BOOL BOOLEAN
172: #endif
173: #ifndef YES
174: #define YES (BOOLEAN)1
175: #define NO (BOOLEAN)0
176: #endif
177:
178: #ifndef min
2.3 timbl 179: #define min(a,b) ((a) <= (b) ? (a) : (b))
2.2 timbl 180: #define max(a,b) ((a) >= (b) ? (a) : (b))
2.1 timbl 181: #endif
182:
183: #define TCP_PORT 80 /* Allocated to http by Jon Postel/ISI 24-Jan-92 */
184: #define OLD_TCP_PORT 2784 /* Try the old one if no answer on 80 */
185: #define DNP_OBJ 80 /* This one doesn't look busy, but we must check */
2.3 timbl 186: /* That one was for decnet */
2.1 timbl 187:
188: /* Inline Function WHITE: Is character c white space? */
189: /* For speed, include all control characters */
190:
2.3 timbl 191: #define WHITE(c) (((unsigned char)(TOASCII(c))) <= 32)
2.1 timbl 192:
193:
2.3 timbl 194: </PRE>
195: <H2>Sucess (>=0) and failure (<0) codes</H2>
196: <PRE>
2.1 timbl 197: #define HT_LOADED 29999 /* Instead of a socket */
198: #define HT_OK 0 /* Generic success*/
199:
200: #define HT_NO_ACCESS -10 /* Access not available */
201: #define HT_FORBIDDEN -11 /* Access forbidden */
202: #define HT_INTERNAL -12 /* Weird -- should never happen. */
203: #define HT_BAD_EOF -12 /* Premature EOF */
204:
2.7 ! luotonen 205:
2.3 timbl 206: #include "HTString.h" /* String utilities */
2.1 timbl 207:
208: #ifdef __STDC__
2.3 timbl 209: #include <stdarg.h>
2.1 timbl 210: #else
2.3 timbl 211: #include <varargs.h>
2.1 timbl 212: #endif
213:
214: #ifdef CURSES
215: /* htbrowse.c; */
2.6 timbl 216: #ifdef ULTRIX /* or DECSTATION */
217: #include <cursesX.h> /* Extended curses under X. Only decent one :lou. */
218: #else
2.3 timbl 219: #include <curses.h>
2.6 timbl 220: #endif /* ULTRIX */
2.1 timbl 221: extern WINDOW *w_top, *w_text, *w_prompt;
222: extern void user_message PARAMS((const char *fmt, ...));
223: extern void prompt_set PARAMS((CONST char * msg));
224: extern void prompt_count PARAMS((long kb));
225: #else
226: #define user_message printf
227: #endif
228:
2.3 timbl 229: </PRE>
230: <H2>Out Of Memory checking for malloc()
231: return:</H2>
232: <PRE>#ifndef __FILE__
2.1 timbl 233: #define __FILE__ ""
234: #define __LINE__ ""
235: #endif
236:
237: #define outofmem(file, func) \
238: { fprintf(stderr, "%s %s: out of memory.\nProgram aborted.\n", file, func); \
239: exit(1);}
240: /* extern void outofmem PARAMS((const char *fname, const char *func)); */
241:
242:
2.3 timbl 243: </PRE>
244: <H3>who put these in and what are they
245: anyway?</H3>
246: <PRE>#ifdef THEY_WILL_BE_REMOVED
2.1 timbl 247: extern void msg_init PARAMS((int height));
248: extern void msg_printf PARAMS((int y, const char *fmt, ...));
249: extern void msg_exit PARAMS((int wait_for_key));
2.3 timbl 250: #endif
2.1 timbl 251:
2.3 timbl 252: </PRE>
253: <H2>Upper- and Lowercase macros</H2>The problem here is that toupper(x)
254: is not defined officially unless
255: isupper(x) is. These macros are
256: CERTAINLY needed on #if defined(pyr)
257: || define(mips) or BDSI platforms.
258: For safefy, we make them mandatory.
259: <PRE>#include <ctype.h>
2.1 timbl 260:
261: #ifndef TOLOWER
262: /* Pyramid and Mips can't uppercase non-alpha */
263: #define TOLOWER(c) (isupper(c) ? tolower(c) : (c))
264: #define TOUPPER(c) (islower(c) ? toupper(c) : (c))
265: #endif /* ndef TOLOWER */
266:
2.6 timbl 267: </PRE>
268: <H2>The local equivalents of CR and LF</H2>We can check for these after net
269: ascii text has been converted to
270: the local representation. Similarly,
271: we include them in strings to be
272: sent as net ascii after translation.
273: <PRE>#define LF FROMASCII('\012') /* ASCII line feed LOCAL EQUIVALENT */
274: #define CR FROMASCII('\015') /* Will be converted to ^M for transmission */
275:
2.1 timbl 276: #endif /* HTUTILS_H */
277:
2.4 timbl 278: </PRE>end of utilities</A></BODY>
2.6 timbl 279: </HTML>
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