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authorAustin Clements <austin@google.com>2014-11-14 12:08:46 -0500
committerAustin Clements <austin@google.com>2014-11-14 12:08:46 -0500
commit5462978cf79ac14328bf8eceeee1c92dc36f0dbd (patch)
treee508b86657632bdd5e22747478cb0a21bb678804 /src/cmd/dist
parent3d0470bf49a2e0c53148d38f8f117e6a1f2090a0 (diff)
downloadgo-5462978cf79ac14328bf8eceeee1c92dc36f0dbd.tar.gz
[dev.power64] liblink: generate dnames[5689] for D_* constants
This is more complicated than the other enums because the D_* enums are full of explicit initializers and repeated values. This tries its best. (This will get much cleaner once we tease these constants apart better.) LGTM=rsc R=rsc CC=golang-codereviews https://codereview.appspot.com/166700043
Diffstat (limited to 'src/cmd/dist')
-rw-r--r--src/cmd/dist/buildgc.c85
1 files changed, 82 insertions, 3 deletions
diff --git a/src/cmd/dist/buildgc.c b/src/cmd/dist/buildgc.c
index 1c3329758..39679fb72 100644
--- a/src/cmd/dist/buildgc.c
+++ b/src/cmd/dist/buildgc.c
@@ -63,22 +63,36 @@ gcopnames(char *dir, char *file)
vfree(&fields);
}
+static int
+xatoi(char *s, char **end)
+{
+ int val = 0;
+ for(; *s && *s >= '0' && *s <= '9'; ++s)
+ val = val * 10 + (*s - '0');
+ *end = s;
+ return val;
+}
+
// mkanames reads [5689].out.h and writes anames[5689].c
// The format is much the same as the Go opcodes above.
-// it also writes out cnames array for C_* constants.
+// It also writes out cnames array for C_* constants and the dnames
+// array for D_* constants.
void
mkanames(char *dir, char *file)
{
- int i, j, ch;
+ int i, j, ch, n, unknown;
Buf in, b, out, out2;
Vec lines;
- char *p;
+ char *p, *p2;
+ Vec dnames[128];
binit(&b);
binit(&in);
binit(&out);
binit(&out2);
vinit(&lines);
+ for(i=0; i<nelem(dnames); i++)
+ vinit(&dnames[i]);
ch = file[xstrlen(file)-3];
bprintf(&b, "%s/../cmd/%cl/%c.out.h", dir, ch, ch);
@@ -87,10 +101,12 @@ mkanames(char *dir, char *file)
// Include link.h so that the extern declaration there is
// checked against the non-extern declaration we are generating.
+ bwritestr(&out, bprintf(&b, "// auto generated by go tool dist\n"));
bwritestr(&out, bprintf(&b, "#include <u.h>\n"));
bwritestr(&out, bprintf(&b, "#include <libc.h>\n"));
bwritestr(&out, bprintf(&b, "#include <bio.h>\n"));
bwritestr(&out, bprintf(&b, "#include <link.h>\n"));
+ bwritestr(&out, bprintf(&b, "#include \"../cmd/%cl/%c.out.h\"\n", ch, ch));
bwritestr(&out, bprintf(&b, "\n"));
bwritestr(&out, bprintf(&b, "char* anames%c[] = {\n", ch));
@@ -127,6 +143,67 @@ mkanames(char *dir, char *file)
if(j>0)
bwriteb(&out, &out2);
+ j=unknown=0;
+ n=-1;
+ for(i=0; i<lines.len; i++) {
+ if(hasprefix(lines.p[i], "\tD_")) {
+ p = xstrstr(lines.p[i], ",");
+ if(p)
+ *p = '\0';
+ p = xstrstr(lines.p[i], "\n");
+ if(p)
+ *p = '\0';
+
+ // Parse explicit value, if any
+ p = xstrstr(lines.p[i], "=");
+ if(p) {
+ // Skip space after '='
+ p2 = p + 1;
+ while(*p2 == ' ' || *p2 == '\t')
+ p2++;
+ n = xatoi(p2, &p2);
+ // We can't do anything about
+ // non-numeric values or anything that
+ // follows
+ while(*p2 == ' ' || *p2 == '\t')
+ p2++;
+ if(*p2 != 0) {
+ unknown = 1;
+ continue;
+ }
+ // Truncate space before '='
+ while(*(p-1) == ' ' || *(p-1) == '\t')
+ p--;
+ *p = '\0';
+ unknown = 0;
+ } else {
+ n++;
+ }
+
+ if(unknown || n >= nelem(dnames))
+ continue;
+
+ p = lines.p[i] + 3;
+ vadd(&dnames[n], p);
+ j++;
+ }
+ }
+ if(j>0){
+ bwritestr(&out, bprintf(&b, "char* dnames%c[] = {\n", ch));
+ for(i=0; i<nelem(dnames); i++) {
+ if(dnames[i].len == 0)
+ continue;
+ bwritestr(&out, bprintf(&b, "\t[D_%s] = \"", dnames[i].p[0]));
+ for(j=0; j<dnames[i].len; j++) {
+ if(j != 0)
+ bwritestr(&out, "/");
+ bwritestr(&out, dnames[i].p[j]);
+ }
+ bwritestr(&out, "\",\n");
+ }
+ bwritestr(&out, "};\n");
+ }
+
writefile(&out, file, 0);
bfree(&b);
@@ -134,4 +211,6 @@ mkanames(char *dir, char *file)
bfree(&out);
bfree(&out2);
vfree(&lines);
+ for(i=0; i<nelem(dnames); i++)
+ vfree(&dnames[i]);
}