source: buchla-68k/prolog/croot.c@ 4810254

Last change on this file since 4810254 was fa38804, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Removed form-feed comments.
  • Property mode set to 100644
File size: 3.0 KB
Line 
1/*
2 ============================================================================
3 croot.c -- Root for Buchla 700 C programs
4 Version 8 -- 1987-06-29 -- D.N. Lynx Crowe
5
6 This version can be setup for I/O redirection or not, depending on the
7 value of REDIRECT. If redirection is supported, so are command line
8 arguments, which must be passed to Croot() at 'cp' by the startup code.
9
10 Normally, this won't be selected, as this is a dedicated application
11 that doesn't expect command line arguments or I/O redirection.
12 ============================================================================
13*/
14
15#define ROOTMSG "{Buchla 700 Croot - Version 8 - 1987-06-29}"
16
17#include "ram.h"
18
19#define REDIRECT 0 /* non-zero for command line stuff */
20
21#define MAXARGS 30 /* maximum number of command line arguments */
22
23void (*_clsall)(void);
24
25static int16_t Argc;
26static int8_t *Argv[MAXARGS];
27
28/*
29 ============================================================================
30 exit() -- return control to the BIOS
31 ============================================================================
32*/
33
34void exit(void)
35{
36 (*_clsall)(); /* close all open files */
37 xtrap15(); /* return to the BIOS */
38}
39
40
41#if REDIRECT
42
43/*
44 ============================================================================
45 _eredir(name) -- output I/O redirection error message to stderr
46 ============================================================================
47*/
48
49static
50_eredir(name)
51char *name;
52{
53 char buff[200];
54
55 strcpy(buff, "Can't open file for redirection: ");
56 strcat(buff, name);
57 strcat(buff, "\n");
58 write(2, buff, strlen(buff));
59 exit();
60}
61
62#endif
63
64/*
65 ============================================================================
66 Croot(cp) -- C root module for the Buchla 700
67 ============================================================================
68*/
69
70void Croot(int8_t *cp)
71{
72 register int8_t *fname;
73 register int16_t k;
74
75 Argv[0] = ROOTMSG;
76 Argc = 1;
77
78 _clsall = _fd_cls;
79 InitFS();
80
81#if REDIRECT
82
83 while (Argc < MAXARGS) { /* handle command line arguments */
84
85 while (*cp EQ ' ' OR *cp EQ '\t') /* skip whitespace */
86 ++cp;
87
88 if (*cp EQ 0) /* check for end of line */
89 break;
90
91 if (*cp EQ '>') { /* > - redirect output */
92
93 k = 1; /* stdout */
94 goto redir;
95
96 } else if (*cp EQ '<') { /* < - redirect input */
97
98 k = 0; /* stdin */
99redir:
100 while (*++cp EQ ' ' OR *cp EQ '\t') /* skip whitespace */
101 ;
102
103 fname = cp; /* pointer to start of name */
104
105 while (*++cp) /* skip to whitespace */
106 if (*cp EQ ' ' OR *cp EQ '\t') {
107
108 *cp++ = 0;
109 break;
110 }
111
112 close(k); /* close old assignment */
113
114 if (k)
115 k = creat(fname, 0666); /* stdout */
116 else
117 k = open(fname, O_RDONLY); /* stdin */
118
119 if (k EQ -1)
120 _eredir(fname);
121
122 } else { /* collect a command line argument */
123
124 Argv[Argc++] = cp;
125
126 while (*++cp) /* find end of argument */
127 if (*cp EQ ' ' OR *cp EQ '\t') {
128
129 *cp++ = 0;
130 break;
131 }
132 }
133 }
134
135#endif
136
137 main(); /* call application */
138 exit(); /* exit in case the application didn't */
139}
140
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