error.c

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

#include "sam.h"

static char *emsg[]={
	/* error_s */
	"can't open",
	"can't create",
	"not in menu:",
	"changes to",
	"I/O error:",
	"can't write while changing:",
	/* error_c */
	"unknown command",
	"no operand for",
	"bad delimiter",
	/* error */
	"can't fork",
	"interrupt",
	"address",
	"search",
	"pattern",
	"newline expected",
	"blank expected",
	"pattern expected",
	"can't nest X or Y",
	"unmatched `}'",
	"command takes no address",
	"addresses overlap",
	"substitution",
	"& match too long",
	"bad \\ in rhs",
	"address range",
	"changes not in sequence",
	"addresses out of order",
	"no file name",
	"unmatched `('",
	"unmatched `)'",
	"malformed `[]'",
	"malformed regexp",
	"reg. exp. list overflow",
	"plan 9 command",
	"can't pipe",
	"no current file",
	"string too long",
	"changed files",
	"empty string",
	"file search",
	"non-unique match for \"\"",
	"tag match too long",
	"too many subexpressions",
	"temporary file too large",
	"file is append-only",
	"no destination for plumb message",
	"internal read error in buffer load",
};
static char *wmsg[]={
	/* warn_s */
	"duplicate file name",
	"no such file",
	"write might change good version of",
	/* warn_S */
	"files might be aliased",
	/* warn */
	"null characters elided",
	"can't run pwd",
	"last char not newline",
	"exit status",
};

void
error(Err s)
{
	char buf[512];

	sprint(buf, "?%s", emsg[s]);
	hiccough(buf);
}

void
error_s(Err s, char *a)
{
	char buf[512];

	sprint(buf, "?%s \"%s\"", emsg[s], a);
	hiccough(buf);
}

void
error_r(Err s, char *a)
{
	char buf[512];

	sprint(buf, "?%s \"%s\": %r", emsg[s], a);
	hiccough(buf);
}

void
error_c(Err s, int c)
{
	char buf[512];

	sprint(buf, "?%s `%C'", emsg[s], c);
	hiccough(buf);
}

void
warn(Warn s)
{
	dprint("?warning: %s\n", wmsg[s]);
}

void
warn_S(Warn s, String *a)
{
	print_s(wmsg[s], a);
}

void
warn_SS(Warn s, String *a, String *b)
{
	print_ss(wmsg[s], a, b);
}

void
warn_s(Warn s, char *a)
{
	dprint("?warning: %s `%s'\n", wmsg[s], a);
}

void
termwrite(char *s)
{
	String *p;

	if(downloaded){
		p = tmpcstr(s);
		if(cmd)
			loginsert(cmd, cmdpt, p->s, p->n);
		else
			Strinsert(&cmdstr, p, cmdstr.n);
		cmdptadv += p->n;
		free(p);
	}else
		Write(2, s, strlen(s));
}