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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
// Compile .go file, import data from .6 file, and generate C string version.
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
void esc(char*);
void fatal(char*, ...);
int
main(int argc, char **argv)
{
char *name;
FILE *fin;
char buf[1024], initfunc[1024], *p, *q;
if(argc != 2) {
fprintf(stderr, "usage: mkbuiltin1 sys\n");
fatal("in file $1.6 s/PACKAGE/$1/");
}
name = argv[1];
snprintf(initfunc, sizeof(initfunc), "init_%s_function", name);
snprintf(buf, sizeof(buf), "%s.%s", name, getenv("O"));
if((fin = fopen(buf, "r")) == NULL) {
fatal("open %s: %s", buf, strerror(errno));
}
// look for $$ that introduces imports
while(fgets(buf, sizeof buf, fin) != NULL)
if(strstr(buf, "$$"))
goto begin;
fatal("did not find beginning of imports");
begin:
printf("char *%simport =\n", name);
// process imports, stopping at $$ that closes them
while(fgets(buf, sizeof buf, fin) != NULL) {
buf[strlen(buf)-1] = 0; // chop \n
if(strstr(buf, "$$"))
goto end;
// chop leading white space
for(p=buf; *p==' ' || *p == '\t'; p++)
;
// cut out decl of init_$1_function - it doesn't exist
if(strstr(buf, initfunc))
continue;
// sys.go claims to be in package PACKAGE to avoid
// conflicts during "6g sys.go". rename PACKAGE to $2.
printf("\t\"");
while(q = strstr(p, "PACKAGE")) {
*q = 0;
esc(p); // up to the substitution
printf("%s", name); // the sub name
p = q+7; // continue with rest
}
esc(p);
printf("\\n\"\n");
}
fatal("did not find end of imports");
end:
printf("\t\"$$\\n\";\n");
return 0;
}
void
esc(char *p)
{
for(; *p; p++) {
if(*p == '\\' || *p == '\"')
printf("\\");
putchar(*p);
}
}
void
fatal(char *msg, ...)
{
va_list arg;
va_start(arg, msg);
fprintf(stderr, "fatal: ");
vfprintf(stderr, msg, arg);
fprintf(stderr, "\n");
exit(2);
}
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