pkgconf/libpkgconf/fragment.c

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/*
* fragment.c
* Management of fragment lists.
*
* Copyright (c) 2012, 2013, 2014 pkgconf authors (see AUTHORS).
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*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
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*/
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#include <libpkgconf/libpkgconf.h>
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struct pkgconf_fragment_check {
char *token;
size_t len;
};
static inline bool
pkgconf_fragment_is_unmergeable(const char *string)
{
static struct pkgconf_fragment_check check_fragments[] = {
{"-framework", 10},
{"-isystem", 8},
};
if (*string != '-')
return true;
for (size_t i = 0; i < PKGCONF_ARRAY_SIZE(check_fragments); i++)
if (!strncmp(string, check_fragments[i].token, check_fragments[i].len))
return true;
return false;
}
static inline bool
pkgconf_fragment_should_munge(const char *string, const char *sysroot_dir)
{
static struct pkgconf_fragment_check check_fragments[] = {
{"-isystem", 8},
};
if (*string != '/')
return false;
if (sysroot_dir != NULL && strncmp(sysroot_dir, string, strlen(sysroot_dir)))
return true;
for (size_t i = 0; i < PKGCONF_ARRAY_SIZE(check_fragments); i++)
if (!strncmp(string, check_fragments[i].token, check_fragments[i].len))
return true;
return false;
}
static inline bool
pkgconf_fragment_is_special(const char *string)
{
if (*string != '-')
return true;
if (!strncmp(string, "-lib:", 5))
return true;
return pkgconf_fragment_is_unmergeable(string);
}
static inline void
pkgconf_fragment_munge(char *buf, size_t buflen, const char *source, const char *sysroot_dir)
{
*buf = '\0';
if (sysroot_dir == NULL)
sysroot_dir = pkgconf_tuple_find_global("pc_sysrootdir");
if (pkgconf_fragment_should_munge(source, sysroot_dir))
strlcat(buf, sysroot_dir, buflen);
strlcat(buf, source, buflen);
}
static inline char *
pkgconf_fragment_copy_munged(const char *source, unsigned int flags)
{
char mungebuf[PKGCONF_BUFSIZE];
char *sysroot_dir;
if (!(flags & PKGCONF_PKG_PKGF_MUNGE_SYSROOT_PREFIX))
return strdup(source);
sysroot_dir = pkgconf_tuple_find_global("pc_sysrootdir");
pkgconf_fragment_munge(mungebuf, sizeof mungebuf, source, sysroot_dir);
return strdup(mungebuf);
}
void
pkgconf_fragment_add(pkgconf_list_t *list, const char *string, unsigned int flags)
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{
pkgconf_fragment_t *frag;
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if (*string == '\0')
return;
if (!pkgconf_fragment_is_special(string))
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{
frag = calloc(sizeof(pkgconf_fragment_t), 1);
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frag->type = *(string + 1);
frag->data = pkgconf_fragment_copy_munged(string + 2, flags);
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}
else
{
char mungebuf[PKGCONF_BUFSIZE];
if (list->tail != NULL && list->tail->data != NULL)
{
pkgconf_fragment_t *parent = list->tail->data;
if (pkgconf_fragment_is_unmergeable(parent->data))
{
size_t len;
char *newdata;
pkgconf_fragment_munge(mungebuf, sizeof mungebuf, string, NULL);
len = strlen(parent->data) + strlen(mungebuf) + 2;
newdata = malloc(len);
strlcpy(newdata, parent->data, len);
strlcat(newdata, " ", len);
strlcat(newdata, mungebuf, len);
free(parent->data);
parent->data = newdata;
return;
}
}
frag = calloc(sizeof(pkgconf_fragment_t), 1);
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frag->type = 0;
frag->data = strdup(string);
}
pkgconf_node_insert_tail(&frag->iter, frag, list);
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}
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static inline pkgconf_fragment_t *
pkgconf_fragment_lookup(pkgconf_list_t *list, pkgconf_fragment_t *base)
{
pkgconf_node_t *node;
PKGCONF_FOREACH_LIST_ENTRY_REVERSE(list->tail, node)
{
pkgconf_fragment_t *frag = node->data;
if (base->type != frag->type)
continue;
if (!strcmp(base->data, frag->data))
return frag;
}
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return NULL;
}
static inline bool
pkgconf_fragment_can_merge_back(pkgconf_fragment_t *base, unsigned int flags, bool is_private)
{
(void) flags;
if (base->type == 'l')
{
if (is_private)
return false;
return true;
}
if (base->type == 'F')
return false;
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if (base->type == 'L')
return false;
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if (base->type == 'I')
return false;
return true;
}
static inline bool
pkgconf_fragment_can_merge(pkgconf_fragment_t *base, unsigned int flags, bool is_private)
{
(void) flags;
if (is_private)
return false;
return pkgconf_fragment_is_unmergeable(base->data);
}
static inline pkgconf_fragment_t *
pkgconf_fragment_exists(pkgconf_list_t *list, pkgconf_fragment_t *base, unsigned int flags, bool is_private)
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{
if (!pkgconf_fragment_can_merge_back(base, flags, is_private))
return NULL;
if (!pkgconf_fragment_can_merge(base, flags, is_private))
return NULL;
return pkgconf_fragment_lookup(list, base);
}
void
pkgconf_fragment_copy(pkgconf_list_t *list, pkgconf_fragment_t *base, unsigned int flags, bool is_private)
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{
pkgconf_fragment_t *frag;
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if ((frag = pkgconf_fragment_exists(list, base, flags, is_private)) != NULL)
pkgconf_fragment_delete(list, frag);
else if (!is_private && !pkgconf_fragment_can_merge_back(base, flags, is_private) && (pkgconf_fragment_lookup(list, base) != NULL))
return;
frag = calloc(sizeof(pkgconf_fragment_t), 1);
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frag->type = base->type;
frag->data = strdup(base->data);
pkgconf_node_insert_tail(&frag->iter, frag, list);
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}
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void
pkgconf_fragment_delete(pkgconf_list_t *list, pkgconf_fragment_t *node)
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{
pkgconf_node_delete(&node->iter, list);
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free(node->data);
free(node);
}
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void
pkgconf_fragment_free(pkgconf_list_t *list)
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{
pkgconf_node_t *node, *next;
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PKGCONF_FOREACH_LIST_ENTRY_SAFE(list->head, next, node)
{
pkgconf_fragment_t *frag = node->data;
free(frag->data);
free(frag);
}
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}
void
pkgconf_fragment_parse(pkgconf_list_t *list, pkgconf_list_t *vars, const char *value, unsigned int flags)
{
int i, argc;
char **argv;
char *repstr = pkgconf_tuple_parse(vars, value);
pkgconf_argv_split(repstr, &argc, &argv);
for (i = 0; i < argc; i++)
pkgconf_fragment_add(list, argv[i], flags);
pkgconf_argv_free(argv);
free(repstr);
}