mem.c

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/****************************************************************
Copyright 1990, 1991, 1994, 2000 by AT&T, Lucent Technologies and Bellcore.

Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
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permission notice and warranty disclaimer appear in supporting
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software without specific, written prior permission.

AT&T, Lucent and Bellcore disclaim all warranties with regard to
this software, including all implied warranties of
merchantability and fitness.  In no event shall AT&T, Lucent or
Bellcore be liable for any special, indirect or consequential
damages or any damages whatsoever resulting from loss of use,
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****************************************************************/

#include "defs.h"
#include "iob.h"

#define MEMBSIZE        32000
#define GMEMBSIZE       16000

#ifdef _WIN32
#undef MSDOS
#endif

 char *
#ifdef KR_headers
gmem(n, round)
        int n;
        int round;
#else
gmem(int n, int round)
#endif
{
        static char *last, *next;
        char *rv;
        if (round)
#ifdef CRAY
                if ((long)next & 0xe000000000000000)
                        next = (char *)(((long)next & 0x1fffffffffffffff) + 1);
#else
#ifdef MSDOS
                if ((int)next & 1)
                        next++;
#else
                next = (char *)(((long)next + sizeof(char *)-1)
                                & ~((long)sizeof(char *)-1));
#endif
#endif
        rv = next;
        if ((next += n) > last) {
                rv = Alloc(n + GMEMBSIZE);

                next = rv + n;
                last = next + GMEMBSIZE;
                }
        return rv;
        }

 struct memblock {
        struct memblock *next;
        char buf[MEMBSIZE];
        };
 typedef struct memblock memblock;

 static memblock *mem0;
 memblock *curmemblock, *firstmemblock;

 char *mem_first, *mem_next, *mem_last, *mem0_last;

 void
mem_init(Void)
{
        curmemblock = firstmemblock = mem0
                = (memblock *)Alloc(sizeof(memblock));
        mem_first = mem0->buf;
        mem_next  = mem0->buf;
        mem_last  = mem0->buf + MEMBSIZE;
        mem0_last = mem0->buf + MEMBSIZE;
        mem0->next = 0;
        }

 char *
#ifdef KR_headers
mem(n, round)
        int n;
        int round;
#else
mem(int n, int round)
#endif
{
        memblock *b;
        register char *rv, *s;

        if (round)
#ifdef CRAY
                if ((long)mem_next & 0xe000000000000000)
                        mem_next = (char *)(((long)mem_next & 0x1fffffffffffffff) + 1);
#else
#ifdef MSDOS
                if ((int)mem_next & 1)
                        mem_next++;
#else
                mem_next = (char *)(((long)mem_next + sizeof(char *)-1)
                                & ~((long)sizeof(char *)-1));
#endif
#endif
        rv = mem_next;
        s = rv + n;
        if (s >= mem_last) {
                if (n > MEMBSIZE)  {
                        fprintf(stderr, "mem(%d) failure!\n", n);
                        exit(1);
                        }
                if (!(b = curmemblock->next)) {
                        b = (memblock *)Alloc(sizeof(memblock));
                        curmemblock->next = b;
                        b->next = 0;
                        }
                curmemblock = b;
                rv = b->buf;
                mem_last = rv + sizeof(b->buf);
                s = rv + n;
                }
        mem_next = s;
        return rv;
        }

 char *
#ifdef KR_headers
tostring(s, n)
        register char *s;
        int n;
#else
tostring(register char *s, int n)
#endif
{
        register char *s1, *se, **sf;
        char *rv, *s0;
        register int k = n + 2, t;

        sf = str_fmt;
        sf['%'] = "%";
        s0 = s;
        se = s + n;
        for(; s < se; s++) {
                t = *(unsigned char *)s;
                s1 = sf[t];
                while(*++s1)
                        k++;
                }
        sf['%'] = "%%";
        rv = s1 = mem(k,0);
        *s1++ = '"';
        for(s = s0; s < se; s++) {
                t = *(unsigned char *)s;
                sprintf(s1, sf[t], t);
                s1 += strlen(s1);
                }
        *s1 = 0;
        return rv;
        }

 char *
#ifdef KR_headers
cpstring(s)
        register char *s;
#else
cpstring(register char *s)
#endif
{
        return strcpy(mem(strlen(s)+1,0), s);
        }

 void
#ifdef KR_headers
new_iob_data(ios, name)
        register io_setup *ios;
        char *name;
#else
new_iob_data(register io_setup *ios, char *name)
#endif
{
        register iob_data *iod;
        register char **s, **se;

        iod = (iob_data *)
                mem(sizeof(iob_data) + ios->nelt*sizeof(char *), 1);
        iod->next = iob_list;
        iob_list = iod;
        iod->type = ios->fields[0];
        iod->name = cpstring(name);
        s = iod->fields;
        se = s + ios->nelt;
        while(s < se)
                *s++ = "0";
        *s = 0;
        }

 char *
#ifdef KR_headers
string_num(pfx, n)
        char *pfx;
        long n;
#else
string_num(char *pfx, long n)
#endif
{
        char buf[32];
        sprintf(buf, "%s%ld", pfx, n);
        /* can't trust return type of sprintf -- BSD gets it wrong */
        return strcpy(mem(strlen(buf)+1,0), buf);
        }

static defines *define_list;

 void
#ifdef KR_headers
def_start(outfile, s1, s2, post)
        FILE *outfile;
        char *s1;
        char *s2;
        char *post;
#else
def_start(FILE *outfile, char *s1, char *s2, char *post)
#endif
{
        defines *d;
        int n, n1;
        extern int in_define;

        n = n1 = strlen(s1);
        if (s2)
                n += strlen(s2);
        d = (defines *)mem(sizeof(defines)+n, 1);
        d->next = define_list;
        define_list = d;
        strcpy(d->defname, s1);
        if (s2)
                strcpy(d->defname + n1, s2);
        in_define = 1;
        nice_printf(outfile, "#define %s", d->defname);
        if (post)
                nice_printf(outfile, " %s", post);
        }

 void
#ifdef KR_headers
other_undefs(outfile)
        FILE *outfile;
#else
other_undefs(FILE *outfile)
#endif
{
        defines *d;
        if (d = define_list) {
                define_list = 0;
                nice_printf(outfile, "\n");
                do
                        nice_printf(outfile, "#undef %s\n", d->defname);
                        while(d = d->next);
                nice_printf(outfile, "\n");
                }
        }

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