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/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <ctype.h>
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <slibtool/slibtool.h>
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"
static int slbt_lib_free_symlist_ctx_impl(
struct slbt_symlist_ctx_impl * ctx,
struct slbt_input * mapinfo,
int ret)
{
if (mapinfo)
slbt_fs_unmap_input(mapinfo);
if (ctx) {
if (ctx->pathbuf)
free(ctx->pathbuf);
if (ctx->symstrs)
free(ctx->symstrs);
if (ctx->symstrv)
free(ctx->symstrv);
free(ctx);
}
return ret;
}
int slbt_lib_get_symlist_ctx(
const struct slbt_driver_ctx * dctx,
const char * path,
struct slbt_symlist_ctx ** pctx)
{
struct slbt_symlist_ctx_impl * ctx;
struct slbt_input mapinfo;
size_t nsyms;
char * ch;
char * cap;
char * src;
const char ** psym;
char dummy;
bool fvalid;
/* map symlist file temporarily */
if (slbt_fs_map_input(dctx,-1,path,PROT_READ,&mapinfo) < 0)
return SLBT_NESTED_ERROR(dctx);
/* alloc context */
if (!(ctx = calloc(1,sizeof(*ctx))))
return slbt_lib_free_symlist_ctx_impl(
ctx,&mapinfo,
SLBT_BUFFER_ERROR(dctx));
/* count symbols */
src = mapinfo.size ? mapinfo.addr : &dummy;
cap = &src[mapinfo.size];
for (; (src<cap) && isspace(*src); )
src++;
for (ch=src,nsyms=0; ch<cap; nsyms++) {
for (; (ch<cap) && !isspace(*ch); )
ch++;
fvalid = false;
for (; (ch<cap) && isspace(*ch); )
fvalid = (*ch++ == '\n') || fvalid;
if (!fvalid)
return slbt_lib_free_symlist_ctx_impl(
ctx,&mapinfo,
SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_FLOW_ERROR));
}
/* clone path, alloc string buffer and symbol vector */
if (!(ctx->pathbuf = strdup(path)))
return slbt_lib_free_symlist_ctx_impl(
ctx,&mapinfo,
SLBT_SYSTEM_ERROR(dctx,0));
if (!(ctx->symstrs = calloc(mapinfo.size+1,1)))
return slbt_lib_free_symlist_ctx_impl(
ctx,&mapinfo,
SLBT_SYSTEM_ERROR(dctx,0));
if (!(ctx->symstrv = calloc(nsyms+1,sizeof(char *))))
return slbt_lib_free_symlist_ctx_impl(
ctx,&mapinfo,
SLBT_SYSTEM_ERROR(dctx,0));
/* copy the source to the allocated string buffer */
memcpy(ctx->symstrs,mapinfo.addr,mapinfo.size);
slbt_fs_unmap_input(&mapinfo);
/* populate the symbol vector, handle whitespace */
src = ctx->symstrs;
cap = &src[mapinfo.size];
for (; (src<cap) && isspace(*src); )
src++;
for (ch=src,psym=ctx->symstrv; ch<cap; psym++) {
*psym = ch;
for (; (ch<cap) && !isspace(*ch); )
ch++;
for (; (ch<cap) && isspace(*ch); )
*ch++ = '\0';
}
/* all done */
ctx->dctx = dctx;
ctx->path = ctx->pathbuf;
ctx->sctx.path = &ctx->path;
ctx->sctx.symstrv = ctx->symstrv;
*pctx = &ctx->sctx;
return 0;
}
void slbt_lib_free_symlist_ctx(struct slbt_symlist_ctx * ctx)
{
struct slbt_symlist_ctx_impl * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct slbt_symlist_ctx_impl,sctx);
ictx = (struct slbt_symlist_ctx_impl *)addr;
slbt_lib_free_symlist_ctx_impl(ictx,0,0);
}
}
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