72 lines
1.2 KiB
C
72 lines
1.2 KiB
C
/*
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(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/*
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Module: Access to program arguments and environment
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Author: Ceriel J.H. Jacobs
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Version: $Id$
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*/
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#include "libm2.h"
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extern char **argv, **environ;
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extern int argc;
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unsigned int _Arguments__Argc;
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static char* findname(char* s1, char* s2)
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{
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while (*s1 == *s2++)
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s1++;
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if (*s1 == '\0' && *(s2 - 1) == '=')
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return s2;
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return 0;
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}
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static unsigned int scopy(char* src, char* dst, unsigned int max)
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{
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register unsigned int i = 0;
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while (*src && i <= max)
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{
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i++;
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*dst++ = *src++;
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}
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if (i <= max)
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{
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*dst = '\0';
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return i + 1;
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}
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while (*src++)
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i++;
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return i + 1;
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}
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void _Arguments_(void)
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{
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_Arguments__Argc = argc;
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}
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unsigned int _Arguments__Argv(int n, char* argument, int l, unsigned int u, int s)
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{
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if (n >= argc)
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return 0;
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return scopy(argv[n], argument, u);
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}
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unsigned int _Arguments__GetEnv(
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char* name, int nn, unsigned int nu, int ns, char* value, int l, unsigned int u, int s)
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{
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register char** p = environ;
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register char* v = 0;
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while (*p && !(v = findname(name, *p++)))
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{
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/* nothing */
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}
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if (!v)
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return 0;
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return scopy(v, value, u);
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}
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