Blame src/internal/slibtool_objlist_impl.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include "slibtool_driver_impl.h"
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#include "slibtool_errinfo_impl.h"
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#include "slibtool_mapfile_impl.h"
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#include "slibtool_objlist_impl.h"
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#include "slibtool_visibility_impl.h"
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slbt_hidden int slbt_objlist_read(
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	int                     fdcwd,
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	struct slbt_obj_list *  objlist)
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{
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	struct slbt_map_info *	mapinfo;
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	int			objc;
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	char **			objv;
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	char *			src;
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	char *			dst;
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	char *			mark;
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	int			skip;
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	/* temporarily map the object list */
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	if (!(mapinfo = slbt_map_file(fdcwd,objlist->name,SLBT_MAP_INPUT)))
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		return -1;
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	/* object list, cautionary null termination, vector null termination */
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	objlist->size = mapinfo->size;
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	objlist->size++;
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	objlist->size++;
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	if (!(objlist->addr = calloc(1,objlist->size))) {
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		slbt_unmap_file(mapinfo);
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		return -1;
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	}
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	/* object list file to normalized object strings */
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	objc = 0;
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	skip = true;
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	for (src=mapinfo->addr,dst=objlist->addr; src<mapinfo->cap; src++) {
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		if (!*src || (*src==' ') || (*src=='\n') || (*src=='\r')) {
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			if (!skip)
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				*dst++ = 0;
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			skip = true;
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		} else {
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			*dst++ = *src;
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			objc += !!skip;
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			skip  = false;
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		}
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	}
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	/* object vector */
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	objlist->objc = objc;
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	if (!(objlist->objv = calloc(++objc,sizeof(char *)))) {
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		free(objlist->addr);
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		slbt_unmap_file(mapinfo);
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		return -1;
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	}
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	for (objv=objlist->objv,mark=objlist->addr; *mark; objv++) {
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		*objv = mark;
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		mark += strlen(mark) + 1;
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	}
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	slbt_unmap_file(mapinfo);
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	return 0;
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}