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[dev.power64] liblink: generate dnames[5689] for D_* constants

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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://golang.org/cl/166700043
This commit is contained in:
Austin Clements 2014-11-14 12:08:46 -05:00
parent 5b38501a4f
commit a11f256436
2 changed files with 87 additions and 3 deletions
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5
include/link.h
View File

@ -626,6 +626,11 @@ extern char* anames9[];
extern char* cnames5[];
extern char* cnames9[];
extern char* dnames5[];
extern char* dnames6[];
extern char* dnames8[];
extern char* dnames9[];
extern LinkArch link386;
extern LinkArch linkamd64;
extern LinkArch linkamd64p32;

85
src/cmd/dist/buildgc.c vendored
View File

@ -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]);
}