ref: 386efe34efca9ecbbf7f8d3ea36c0c9887ce8e0a
parent: ba3a4b9f50ac53f5753efc115c24a250b3168cb8
author: Quentin Rameau <quinq@fifth.space>
date: Mon May 30 06:29:32 EDT 2016
[driver] regroup tools into a tools[] array. This way we can easily switch in different functions and it becomes easier to read what we do here. Thanks to FRIGN for the enum suggestion.
--- a/driver/posix/scc.c
+++ b/driver/posix/scc.c
@@ -16,7 +16,13 @@
#define NARGS 64
-struct tool {+enum {+ CC1,
+ CC2,
+ QBE,
+};
+
+static struct {char cmd[FILENAME_MAX];
char *args[NARGS];
char bin[16];
@@ -23,56 +29,55 @@
char name[8];
int in, out;
pid_t pid;
+} tools[] = {+ [CC1] = { .name = "cc1", },+ [CC2] = { .name = "cc2", },+ [QBE] = { .name = "qbe", .bin = "qbe", .cmd = "qbe", },};
-typedef struct tool Tool;
-
char *argv0;
-static Tool cc1 = { .name = "cc1" },- cc2 = { .name = "cc2" },- qbe = { .name = "qbe", .bin = "qbe", .cmd = "qbe" };static char *arch;
static void
terminate(void)
{- if (cc1.pid)
- kill(cc1.pid, SIGTERM);
- if (cc2.pid)
- kill(cc2.pid, SIGTERM);
- if (qbe.pid)
- kill(qbe.pid, SIGTERM);
+ if (tools[CC1].pid)
+ kill(tools[CC1].pid, SIGTERM);
+ if (tools[CC2].pid)
+ kill(tools[CC2].pid, SIGTERM);
+ if (tools[QBE].pid)
+ kill(tools[QBE].pid, SIGTERM);
}
-Tool *
-settool(Tool *tool, int pipeout)
+int
+settool(int tool, int pipeout)
{char *namefmt, *cmdfmt;
int fds[2], n;
static int fdin;
- if (tool != &qbe) {- n = snprintf(tool->bin, sizeof(tool->bin),
- arch ? "%s-%s" : "%s", tool->name, arch);
- if (n < 0 || n >= sizeof(tool->bin))
+ if (tool != QBE) {+ n = snprintf(tools[tool].bin, sizeof(tools[tool].bin),
+ arch ? "%s-%s" : "%s", tools[tool].name, arch);
+ if (n < 0 || n >= sizeof(tools[tool].bin))
die("scc: target tool name too long");- n = snprintf(tool->cmd, sizeof(tool->cmd),
- "%s/libexec/scc/%s", PREFIX, tool->bin);
- if (n < 0 || n >= sizeof(tool->cmd))
+ n = snprintf(tools[tool].cmd, sizeof(tools[tool].cmd),
+ "%s/libexec/scc/%s", PREFIX, tools[tool].bin);
+ if (n < 0 || n >= sizeof(tools[tool].cmd))
die("scc: target tool path too long");}
- tool->args[0] = tool->bin;
+ tools[tool].args[0] = tools[tool].bin;
if (fdin) {- tool->in = fdin;
+ tools[tool].in = fdin;
fdin = 0;
}
if (pipeout) {if (pipe(fds))
die("scc: pipe: %s", strerror(errno));- tool->out = fds[1];
+ tools[tool].out = fds[1];
fdin = fds[0];
}
@@ -80,25 +85,25 @@
}
void
-spawn(Tool *tool)
+spawn(int tool)
{- switch (tool->pid = fork()) {+ switch (tools[tool].pid = fork()) {case -1:
- die("scc: %s: %s", tool->name, strerror(errno));+ die("scc: %s: %s", tools[tool].name, strerror(errno));case 0:
- if (tool->out)
- dup2(tool->out, 1);
- if (tool->in)
- dup2(tool->in, 0);
- execvp(tool->cmd, tool->args);
+ if (tools[tool].out)
+ dup2(tools[tool].out, 1);
+ if (tools[tool].in)
+ dup2(tools[tool].in, 0);
+ execvp(tools[tool].cmd, tools[tool].args);
fprintf(stderr, "scc: execv %s: %s\n",
- tool->cmd, strerror(errno));
+ tools[tool].cmd, strerror(errno));
_exit(1);
default:
- if (tool->in)
- close(tool->in);
- if (tool->out)
- close(tool->out);
+ if (tools[tool].in)
+ close(tools[tool].in);
+ if (tools[tool].out)
+ close(tools[tool].out);
break;
}
}
@@ -133,25 +138,25 @@
if (!argc)
die("scc: fatal error: no input files");- cc1.args[1] = *argv;
+ tools[CC1].args[1] = *argv;
- spawn(settool(&cc1, 1));
+ spawn(settool(CC1, 1));
if (!arch || strcmp(arch, "qbe")) {- spawn(settool(&cc2, 0));
+ spawn(settool(CC2, 0));
} else {- spawn(settool(&cc2, 1));
- spawn(settool(&qbe, 0));
+ spawn(settool(CC2, 1));
+ spawn(settool(QBE, 0));
}
for (i = 0; i < 3; ++i) {if ((pid = wait(&st)) < 0)
break;
- if (pid == cc1.pid)
- cc1.pid = 0;
- else if (pid == cc2.pid)
- cc2.pid = 0;
- else if (pid == qbe.pid)
- qbe.pid = 0;
+ if (pid == tools[CC1].pid)
+ tools[CC1].pid = 0;
+ else if (pid == tools[CC2].pid)
+ tools[CC2].pid = 0;
+ else if (pid == tools[QBE].pid)
+ tools[QBE].pid = 0;
if (!WIFEXITED(st) || WEXITSTATUS(st) != 0)
exit(-1);
}