view helpers/cfg-hdr-gen.c @ 660:293c7db5f10f

bmi3: fixed the mysterious "mute on first call" bug When UI-enabled fw boots on a previously blank (no /mmi/* files) FFS for the first time, the output_volume member of the persistent UI settings structure was left uninitialized, corresponding to the earpiece volume being set to mute, which is an invalid setting. Because of other quirks in the far-from-finished UI code, this volume setting takes effect only when the first call is answered, producing the odd behaviour seen at the user level. The current fix is to set the blank-FFS default for output_volume to volume level 4, which is the same -6 dB Iota volume as the ACI default.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 14 May 2020 02:50:41 +0000
parents b8b08c302ace
children
line wrap: on
line source

/*
 * This helper program generates the set of *.cfg header files, based on a
 * template file and environment variables for the non-constant settings.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <strings.h>

char *infname;
FILE *inf, *outf;
char include_guard_symbol[32];
char linebuf[256];
int lineno;

make_include_guard_symbol(fname)
	char *fname;
{
	char *sp, *dp;
	int c;

	sp = fname;
	dp = include_guard_symbol;
	*dp++ = '_';
	*dp++ = '_';
	while (c = *sp++) {
		if (islower(c))
			c = toupper(c);
		else if (c == '.')
			c = '_';
		*dp++ = c;
	}
	*dp++ = '_';
	*dp++ = '_';
	*dp = '\0';
}

close_output()
{
	if (outf) {
		fprintf(outf, "#endif /* %s */\n", include_guard_symbol);
		fclose(outf);
		outf = 0;
	}
}

bracket_line()
{
	char *cp;

	close_output();
	cp = index(linebuf+1, ']');
	if (!cp) {
		fprintf(stderr, "%s line %d: unterminated bracket line\n",
			infname, lineno);
		exit(1);
	}
	*cp = '\0';
	outf = fopen(linebuf+1, "w");
	if (!outf) {
		perror(linebuf+1);
		exit(1);
	}
	make_include_guard_symbol(linebuf+1);
	fprintf(outf, "#ifndef %s\n", include_guard_symbol);
	fprintf(outf, "#define %s\n", include_guard_symbol);
}

process_line()
{
	char *cp, *symbol, *value;

	if (linebuf[0] == '[')
		return bracket_line();
	for (cp = linebuf; isspace(*cp); cp++)
		;
	if (*cp == '\0' || *cp == '#')
		return;
	for (symbol = cp; *cp && !isspace(*cp); cp++)
		;
	if (!*cp) {
inv:		fprintf(stderr, "%s line %d: expected two fields\n",
			infname, lineno);
		exit(1);
	}
	*cp++ = '\0';
	while (isspace(*cp))
		cp++;
	if (*cp == '\0' || *cp == '#')
		goto inv;
	for (value = cp; *cp && !isspace(*cp); cp++)
		;
	if (*cp)
		*cp++ = '\0';
	while (isspace(*cp))
		cp++;
	if (*cp != '\0' && *cp != '#')
		goto inv;
	if (!strcmp(value, "var")) {
		value = getenv(symbol);
		if (!value) {
			fprintf(stderr,
			"%s line %d: no environment variable named %s\n",
				infname, lineno, symbol);
			exit(1);
		}
	}
	if (!outf) {
		fprintf(stderr, "%s line %d: no open output file\n",
			infname, lineno);
		exit(1);
	}
	fprintf(outf, "#define %s %s\n", symbol, value);
}

main(argc, argv)
	char **argv;
{
	if (argc != 3) {
		fprintf(stderr, "usage: %s template-file output-dir\n",
			argv[0]);
		exit(1);
	}
	infname = argv[1];
	inf = fopen(infname, "r");
	if (!inf) {
		perror(infname);
		exit(1);
	}
	if (chdir(argv[2]) < 0) {
		perror(argv[2]);
		exit(1);
	}
	for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++)
		process_line();
	close_output();
	exit(0);
}