view release on metacpan or  search on metacpan

src/win32/tools/tiny_libmaker.c  view on Meta::CPAN

ArHdr arhdr = {
    "/               ",
    "            ",
    "0     ",
    "0     ",
    "0       ",
    "          ",
    ARFMAG
    };

ArHdr arhdro = {
    "                ",
    "            ",
    "0     ",
    "0     ",
    "0       ",
    "          ",
    ARFMAG
    };

int main(int argc, char **argv)
{
    FILE *fi, *fh = NULL, *fo = NULL;
    ElfW(Ehdr) *ehdr;
    ElfW(Shdr) *shdr;
    ElfW(Sym) *sym;
    int i, fsize, iarg;
    char *buf, *shstr, *symtab = NULL, *strtab = NULL;
    int symtabsize = 0;//, strtabsize = 0;
    char *anames = NULL;
    int *afpos = NULL;
    int istrlen, strpos = 0, fpos = 0, funccnt = 0, funcmax, hofs;
    char afile[260], tfile[260], stmp[20];
    char *file, *name;
    int ret = 2;


    strcpy(afile, "ar_test.a");
    iarg = 1;

    if (argc < 2)
    {
        printf("usage: tiny_libmaker [lib] file...\n");
        return 1;
    }
    for (i=1; i<argc; i++) {
        istrlen = strlen(argv[i]);
        if (argv[i][istrlen-2] == '.') {
            if(argv[i][istrlen-1] == 'a')
                strcpy(afile, argv[i]);
            else if(argv[i][istrlen-1] == 'o') {
                iarg = i;
                break;
            }
        }
    }

    if ((fh = fopen(afile, "wb")) == NULL)
    {
        fprintf(stderr, "Can't open file %s \n", afile);
        goto the_end;
    }

    sprintf(tfile, "%s.tmp", afile);
    if ((fo = fopen(tfile, "wb+")) == NULL)
    {
        fprintf(stderr, "Can't create temporary file %s\n", tfile);
        goto the_end;
    }

    funcmax = 250;
    afpos = realloc(NULL, funcmax * sizeof *afpos); // 250 func
    memcpy(&arhdro.ar_mode, "100666", 6);

    //iarg = 1;
    while (iarg < argc)
    {
        if (!strcmp(argv[iarg], "rcs")) {
            iarg++;
            continue;
        }
        if ((fi = fopen(argv[iarg], "rb")) == NULL)
        {
            fprintf(stderr, "Can't open file %s \n", argv[iarg]);
            goto the_end;
        }
        fseek(fi, 0, SEEK_END);
        fsize = ftell(fi);
        fseek(fi, 0, SEEK_SET);
        buf = malloc(fsize + 1);
        fread(buf, fsize, 1, fi);
        fclose(fi);

        //printf("%s:\n", argv[iarg]);

        // elf header
        ehdr = (ElfW(Ehdr) *)buf;
        if (ehdr->e_ident[4] != ELFCLASSW)
        {
            fprintf(stderr, "Unsupported Elf Class: %s\n", argv[iarg]);
            goto the_end;
        }

        shdr = (ElfW(Shdr) *) (buf + ehdr->e_shoff + ehdr->e_shstrndx * ehdr->e_shentsize);
        shstr = (char *)(buf + shdr->sh_offset);
        for (i = 0; i < ehdr->e_shnum; i++)
        {
            shdr = (ElfW(Shdr) *) (buf + ehdr->e_shoff + i * ehdr->e_shentsize);
            if (!shdr->sh_offset)
                continue;
            if (shdr->sh_type == SHT_SYMTAB)
            {
                symtab = (char *)(buf + shdr->sh_offset);
                symtabsize = shdr->sh_size;
            }
            if (shdr->sh_type == SHT_STRTAB)
            {
                if (!strcmp(shstr + shdr->sh_name, ".strtab"))
                {
                    strtab = (char *)(buf + shdr->sh_offset);
                    //strtabsize = shdr->sh_size;
                }
            }
        }

        if (symtab && symtabsize)
        {
            int nsym = symtabsize / sizeof(ElfW(Sym));
            //printf("symtab: info size shndx name\n");
            for (i = 1; i < nsym; i++)
            {
                sym = (ElfW(Sym) *) (symtab + i * sizeof(ElfW(Sym)));
                if (sym->st_shndx &&
                    (sym->st_info == 0x10
                    || sym->st_info == 0x11
                    || sym->st_info == 0x12
                    )) {
                    //printf("symtab: %2Xh %4Xh %2Xh %s\n", sym->st_info, sym->st_size, sym->st_shndx, strtab + sym->st_name);
                    istrlen = strlen(strtab + sym->st_name)+1;
                    anames = realloc(anames, strpos+istrlen);
                    strcpy(anames + strpos, strtab + sym->st_name);
                    strpos += istrlen;
                    if (++funccnt >= funcmax) {
                        funcmax += 250;
                        afpos = realloc(afpos, funcmax * sizeof *afpos); // 250 func more
                    }
                    afpos[funccnt] = fpos;
                }
            }
        }

        file = argv[iarg];
        for (name = strchr(file, 0);
             name > file && name[-1] != '/' && name[-1] != '\\';
             --name);
        istrlen = strlen(name);
        if (istrlen >= sizeof(arhdro.ar_name))
            istrlen = sizeof(arhdro.ar_name) - 1;
        memset(arhdro.ar_name, ' ', sizeof(arhdro.ar_name));
        memcpy(arhdro.ar_name, name, istrlen);