[pkgsrc/trunk]: pkgsrc/sysutils/intel-microcode-netbsd/files Clean up and cla...

[maxv <maxv%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/63b046e48990
branches:  trunk
changeset: 395606:63b046e48990
user:      maxv <maxv%pkgsrc.org@localhost>
date:      Fri May 10 18:26:46 2019 +0000

description:
Clean up and clarify.

diffstat:

 sysutils/intel-microcode-netbsd/files/extract.c |  77 ++++++++++++++----------
 1 files changed, 44 insertions(+), 33 deletions(-)

diffs (198 lines):

diff -r d69228b2c949 -r 63b046e48990 sysutils/intel-microcode-netbsd/files/extract.c
--- a/sysutils/intel-microcode-netbsd/files/extract.c   Fri May 10 16:25:40 2019 +0000
+++ b/sysutils/intel-microcode-netbsd/files/extract.c   Fri May 10 18:26:46 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: extract.c,v 1.4 2018/05/07 04:27:43 msaitoh Exp $ */
+/* $NetBSD: extract.c,v 1.5 2019/05/10 18:26:46 maxv Exp $ */
 
 #include <sys/stat.h>
 #include <stdlib.h>
@@ -14,8 +14,11 @@
 FILE *in;
 int lc;
 
+/*
+ * Read .dat data, and convert to binary format.
+ */
 static int
-getbin(void *buf, int len)
+get_bin(void *buf, int len)
 {
        char lbuf[100], *l;
        uint32_t b[4];
@@ -26,7 +29,7 @@
                if (l[0] == '/')
                        continue;
                n = sscanf(l, "0x%x, 0x%x, 0x%x, 0x%x,",
-                          &b[0], &b[1], &b[2], &b[3]);
+                   &b[0], &b[1], &b[2], &b[3]);
                if (n != 4)
                        errx(3, "can't digest line %d", lc);
 
@@ -39,7 +42,7 @@
                buf = (char *)buf + 16;
        }
 
-       return (-1);
+       return -1;
 }
 
 static int
@@ -77,14 +80,15 @@
 
 static void
 writeout(struct intel1_ucode_header *uh, int len,
-        struct intel1_ucode_ext_table *eh)
+    struct intel1_ucode_ext_table *eh)
 {
        char name[18], alias[11];
        int fd, used, i, j;
        struct intel1_ucode_proc_signature *eps;
        int rv;
 
-       sprintf(name, "%08x.%08x", uh->uh_signature, uh->uh_rev);
+       /* Write the microcode to a file. */
+       snprintf(name, sizeof(name), "%08x.%08x", uh->uh_signature, uh->uh_rev);
        fd = open(name, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
        if (fd < 0)
                err(2, "open %s", name);
@@ -97,7 +101,7 @@
        for (i = 0; i < 8; i++) {
                if (!(uh->uh_proc_flags & (1 << i)))
                        continue;
-               sprintf(alias, "%08x-%d", uh->uh_signature, i);
+               snprintf(alias, sizeof(alias), "%08x-%d", uh->uh_signature, i);
                used += link_unless_newer_exists(name, alias, uh->uh_rev);
        }
        if (eh) {
@@ -107,10 +111,10 @@
                        for (i = 0; i < 8; i++) {
                                if (!(eps->ups_proc_flags & (1 << i)))
                                        continue;
-                               sprintf(alias, "%08x-%d",
-                                       eps->ups_signature, i);
+                               snprintf(alias, sizeof(alias), "%08x-%d",
+                                   eps->ups_signature, i);
                                used += link_unless_newer_exists(name, alias,
-                                                                uh->uh_rev);
+                                   uh->uh_rev);
                        }
                }
        }
@@ -119,54 +123,58 @@
        printf("%s: %d links\n", name, used);
 }
 
-void
-update_size(struct intel1_ucode_header *uh,
-    uint32_t *datasize, uint32_t *totalsize)
+static void
+get_sizes(struct intel1_ucode_header *uh, uint32_t *datasize,
+    uint32_t *totalsize)
 {
-               if (uh->uh_data_size)
-                       *datasize = uh->uh_data_size;
-               else
-                       *datasize = 2000;
-               if (uh->uh_total_size)
-                       *totalsize = uh->uh_total_size;
-               else
-                       *totalsize = *datasize + 48;
+       if (uh->uh_data_size)
+               *datasize = uh->uh_data_size;
+       else
+               *datasize = 2000;
+       if (uh->uh_total_size)
+               *totalsize = uh->uh_total_size;
+       else
+               *totalsize = *datasize + 48;
 }
 
-/* Extract .dat (or .inc) file. Usually for microcode.dat. */
-int
+/*
+ * Extract .dat (or .inc) file. Usually for "microcode.dat".
+ */
+static int
 extract_dat(const char *fname)
 {
+       struct intel1_ucode_ext_table *eh;
        struct intel1_ucode_header uh;
        uint32_t datasize, totalsize;
        void *theupdate;
-       struct intel1_ucode_ext_table *eh;
 
        in = fopen(fname, "r");
        if (!in)
                err(2, "could not open \"%s\"", fname);
 
        for (;;) {
-               if (getbin(&uh, sizeof(uh)) < 0)
+               /* Get the ucode header. */
+               if (get_bin(&uh, sizeof(uh)) < 0)
                        break;
                if (uh.uh_header_ver != 1)
                        errx(3, "wrong file format, last line %d", lc);
 
-               update_size(&uh, &datasize, &totalsize);
-
+               /* Compute the total size, and fetch everything. */
+               get_sizes(&uh, &datasize, &totalsize);
                theupdate = malloc(totalsize);
                memcpy(theupdate, &uh, 48);
-               if (getbin((char *)theupdate + 48, totalsize - 48) < 0)
+               if (get_bin((char *)theupdate + 48, totalsize - 48) < 0)
                        errx(3, "data format");
 
+               /* Maybe an extended header. */
                if (totalsize != datasize + 48)
                        eh = (void *)((char *)theupdate + 48 + datasize);
                else
                        eh = NULL;
 
+               /* Write out the ucode. */
                writeout(theupdate, totalsize, eh);
                free(theupdate);
-
        }
 
        fclose(in);
@@ -174,8 +182,10 @@
        return 0;
 }
 
-/* Extract binary files (UV-WX-YZ style filename) */
-int
+/*
+ * Extract binary files (UV-WX-YZ style filename).
+ */
+static int
 extract_bin(int argc, char **argv)
 {
        struct intel1_ucode_header *uh;
@@ -187,7 +197,7 @@
        int i, rv;
 
        argv++; /* Skip argc[0] (command name). */
-       
+
        for (i = 1; i < argc; i++, argv++) {
                rv = stat(*argv, &sb);
                if (rv != 0)
@@ -209,6 +219,7 @@
                            "failed to read \"%s\" (size = %zu)",
                            *argv, sb.st_size);
                left = sb.st_size;
+
 next:
                uh = (struct intel1_ucode_header *)theupdate;
 
@@ -230,7 +241,7 @@
                        errx(EXIT_FAILURE,
                            "wrong file format, last line %d", lc);
 
-               update_size(uh, &datasize, &totalsize);
+               get_sizes(uh, &datasize, &totalsize);
 
                if (totalsize != datasize + 48)
                        eh = (void *)((char *)theupdate + 48 + datasize);