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/**********************************************************/
/* apimagic: cparser-based API normalization utility */
/* Copyright (C) 2015--2016 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.APIMAGIC. */
/**********************************************************/
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include <apimagic/apimagic.h>
#include "apimagic_driver_impl.h"
static int amgc_free_unit_ctx_impl(struct amgc_unit_ctx_impl * ctx, int status)
{
if (ctx) {
amgc_unmap_input(&ctx->map);
free(ctx);
}
return status;
}
static FILE * amgc_stdin_to_tmp(const struct amgc_driver_ctx * dctx)
{
struct amgc_driver_ctx_impl * ictx;
uintptr_t addr;
int fdtmp;
FILE * ftmp;
char buf[4096];
ssize_t nread;
int ret;
addr = (uintptr_t)dctx - offsetof(struct amgc_driver_ctx_impl,ctx);
ictx = (struct amgc_driver_ctx_impl *)addr;
if (ictx->fdtmpin >= 0) {
if ((fdtmp = dup(ictx->fdtmpin)) < 0)
return 0;
if (!(ftmp = fdopen(fdtmp,"r")))
close(fdtmp);
return ftmp;
}
if (!(ftmp = tmpfile()))
return 0;
if ((ictx->fdtmpin = dup(fileno(ftmp))) < 0) {
fclose(ftmp);
return 0;
}
nread = read(0,buf,sizeof(buf)-1);
while (nread) {
if (nread > 0) {
buf[nread] = '\0';
ret = fputs(buf,ftmp);
} else
ret = (errno == EINTR) ? 0 : -1;
if (ret < 0) {
fclose(ftmp);
return 0;
}
nread = read(0,buf,sizeof(buf)-1);
}
return ftmp;
}
int amgc_get_unit_ctx(
const struct amgc_driver_ctx * dctx,
const char * path,
struct amgc_unit_ctx ** pctx)
{
struct amgc_unit_ctx_impl * ctx;
FILE * ftmp;
int fd;
if (!dctx || !(ctx = calloc(sizeof(*ctx),1)))
return -1;
if (strcmp(path,"-"))
fd = -1;
else if (!(ftmp = amgc_stdin_to_tmp(dctx)))
return amgc_free_unit_ctx_impl(ctx,-1);
else if ((fd = dup(fileno(ftmp))) < 0)
return amgc_free_unit_ctx_impl(ctx,-1);
else
fclose(ftmp);
if (amgc_map_input(fd,path,PROT_READ,&ctx->map))
return amgc_free_unit_ctx_impl(ctx,-1);
if (fd > 0)
close(fd);
memcpy(&ctx->cctx,dctx->cctx,
sizeof(ctx->cctx));
ctx->path = path;
ctx->uctx.path = &ctx->path;
ctx->uctx.map = &ctx->map;
ctx->uctx.cctx = &ctx->cctx;
*pctx = &ctx->uctx;
return 0;
}
void amgc_free_unit_ctx(struct amgc_unit_ctx * ctx)
{
struct amgc_unit_ctx_impl * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct amgc_unit_ctx_impl,uctx);
ictx = (struct amgc_unit_ctx_impl *)addr;
amgc_free_unit_ctx_impl(ictx,0);
}
}
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