DeforaOS/CPP
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Working on substitution directives

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This commit is contained in:
Pierre Pronchery 2008-03-02 01:33:45 +00:00
parent cd86a3c031
commit 8fbb692fd9
3 changed files with 92 additions and 13 deletions
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3
include/cpp.h
View File

@ -100,6 +100,9 @@ void cpp_delete(Cpp * cpp);
char const * cpp_get_filename(Cpp * cpp);
/* useful */
int cpp_define_add(Cpp * cpp, char const * name, char const * value);
int cpp_define_remove(Cpp * cpp, char const * name);
int cpp_path_add(Cpp * cpp, char const * path);
int cpp_scan(Cpp * cpp, Token ** token);

56
src/cpp.c
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@ -14,7 +14,10 @@
* NonCommercial-ShareAlike 3.0 along with cpp; if not, browse to
* http://creativecommons.org/licenses/by-nc-sa/3.0/ */
/* FIXME
* - comments are not handled in directives */
* - comments are not handled in directives
* - fix includes (system vs regular, inclusion order)
* - implement define and undef
* - implement ifdef and ifndef */
@ -55,6 +58,9 @@ struct _Cpp
Cpp * subparser;
char ** paths;
size_t paths_cnt;
/* substitutions */
char ** defines; /* FIXME also store the value */
size_t defines_cnt;
};
/* FIXME use CPP_CODE_META_* in a structure with strings and pointers to
@ -398,6 +404,7 @@ static int _cpp_callback_comment(Parser * parser, Token * token, int c,
/* these functions should return 0 (or -1 on errors) */
static int _directive_error(Cpp * cpp, Token * token, char const * str);
static int _directive_include(Cpp * cpp, Token * token, char const * str);
static int _directive_undef(Cpp * cpp, Token * token, char const * str);
static int _directive_warning(Cpp * cpp, Token * token, char const * str);
static int _cpp_callback_directive(Parser * parser, Token * token, int c,
@ -470,8 +477,7 @@ static int _cpp_callback_directive(Parser * parser, Token * token, int c,
token_set_code(token, CPP_CODE_META_PRAGMA);
break;
case CPP_DIRECTIVE_UNDEF:
/* FIXME implement */
token_set_code(token, CPP_CODE_META_UNDEF);
_directive_undef(cpp, token, str);
break;
case CPP_DIRECTIVE_WARNING:
_directive_warning(cpp, token, str);
@ -504,7 +510,6 @@ static char * _include_path(Cpp * cpp, Token * token, char const * str);
static int _directive_include(Cpp * cpp, Token * token, char const * str)
{
char * path;
Cpp ** p;
size_t i;
if((path = _include_path(cpp, token, str)) == NULL)
@ -599,6 +604,13 @@ static char * _lookup_error(Token * token, char const * path, int system)
return NULL;
}
static int _directive_undef(Cpp * cpp, Token * token, char const * str)
{
cpp_define_remove(cpp, str); /* FIXME may not be just a word */
token_set_code(token, CPP_CODE_META_UNDEF);
return 0;
}
static int _directive_warning(Cpp * cpp, Token * token, char const * str)
{
int ret;
@ -767,6 +779,8 @@ Cpp * cpp_new(char const * filename, int filters)
cpp->subparser = NULL;
cpp->paths = NULL;
cpp->paths_cnt = 0;
cpp->defines = NULL;
cpp->defines_cnt = 0;
if((p = strdup(filename)) != NULL)
{
cpp_path_add(cpp, dirname(p)); /* FIXME inclusion order */
@ -814,6 +828,40 @@ char const * cpp_get_filename(Cpp * cpp)
/* useful */
/* cpp_define_add */
int cpp_define_add(Cpp * cpp, char const * name, char const * value)
{
char ** p;
if((p = realloc(cpp->defines, sizeof(*p) * (cpp->defines_cnt + 1)))
== NULL)
return error_set_code(1, "%s", strerror(errno));
cpp->defines = p;
if((p[cpp->defines_cnt] = strdup(name)) == NULL)
return error_set_code(1, "%s", strerror(errno));
cpp->defines_cnt++;
return 0;
}
/* cpp_define_remove */
int cpp_define_remove(Cpp * cpp, char const * name)
{
size_t i;
for(i = 0; i < cpp->defines_cnt; i++)
if(strcmp(cpp->defines[i], name) == 0)
break;
if(i == cpp->defines_cnt)
return 1;
free(cpp->defines[i]);
cpp->defines_cnt--;
for(; i < cpp->defines_cnt; i++)
cpp->defines[i] = cpp->defines[i + 1];
return 0;
}
/* cpp_path_add */
int cpp_path_add(Cpp * cpp, char const * path)
{

46
src/main.c
View File

@ -31,9 +31,11 @@
typedef struct _Prefs
{
int flags;
char const * outfile;
const char ** paths;
size_t paths_cnt;
char const * output;
const char ** defines;
size_t defines_cnt;
} Prefs;
#define PREFS_t 0x1
@ -53,15 +55,15 @@ static int _cpp(Prefs * prefs, int filec, char * filev[])
FILE * fp;
int i;
if(prefs->output == NULL)
if(prefs->outfile == NULL)
fp = stdout;
else if((fp = fopen(prefs->output, "w")) == NULL)
return error_set_print("cpp", 1, "%s: %s", prefs->output,
else if((fp = fopen(prefs->outfile, "w")) == NULL)
return error_set_print("cpp", 1, "%s: %s", prefs->outfile,
strerror(errno));
for(i = 0; i < filec; i++)
ret |= _cpp_do(prefs, fp, filev[i]);
if(fclose(fp) != 0)
return error_set_print("cpp", 1, "%s: %s", prefs->output,
return error_set_print("cpp", 1, "%s: %s", prefs->outfile,
strerror(errno));
return ret;
}
@ -71,6 +73,7 @@ static int _cpp_do(Prefs * prefs, FILE * fp, char const * filename)
int ret;
Cpp * cpp;
size_t i;
size_t j;
Token * token;
int code;
@ -80,7 +83,10 @@ static int _cpp_do(Prefs * prefs, FILE * fp, char const * filename)
for(i = 0; i < prefs->paths_cnt; i++)
if(cpp_path_add(cpp, prefs->paths[i]) != 0)
break;
if(i != prefs->paths_cnt)
for(j = 0; j < prefs->defines_cnt; j++)
if(cpp_define_add(cpp, prefs->defines[j], NULL) != 0)
break;
if(i != prefs->paths_cnt || j != prefs->defines_cnt)
{
cpp_delete(cpp);
return 1;
@ -127,7 +133,8 @@ static int _cpp_error(void)
/* FIXME -E prints metadata? */
static int _usage(void)
{
fputs("Usage: " PACKAGE " [-I directory][-o outfile][-t] input...\n"
fputs("Usage: " PACKAGE " [-D name[=value]]...[-I directory][-o outfile][-t] input...\n"
" -D Add a substitution\n"
" -I Add a directory to the search path\n"
" -o Write output to a file\n"
" -t Convert trigraphs\n", stderr);
@ -136,6 +143,7 @@ static int _usage(void)
/* main */
static int _main_add_define(Prefs * name, char * define);
static int _main_add_path(Prefs * prefs, char const * path);
int main(int argc, char * argv[])
@ -145,15 +153,19 @@ int main(int argc, char * argv[])
int o;
memset(&prefs, 0, sizeof(prefs));
while((o = getopt(argc, argv, "I:o:t")) != -1)
while((o = getopt(argc, argv, "D:I:o:t")) != -1)
switch(o)
{
case 'D':
if(_main_add_define(&prefs, optarg) != 0)
return 2;
break;
case 'I':
if(_main_add_path(&prefs, optarg) != 0)
return 2;
break;
case 'o':
prefs.output = optarg;
prefs.outfile = optarg;
break;
case 't':
prefs.flags |= PREFS_t;
@ -168,6 +180,22 @@ int main(int argc, char * argv[])
return ret;
}
static int _main_add_define(Prefs * prefs, char * define)
{
const char ** p;
char * value;
if(strlen(define) == 0)
return 1;
value = strtok(define, "=");
if((p = realloc(prefs->defines, sizeof(*p) * (prefs->defines_cnt + 1)))
== NULL)
return error_set_print(PACKAGE, 1, "%s", strerror(errno));
prefs->defines = p;
prefs->defines[prefs->defines_cnt++] = define;
return 0;
}
static int _main_add_path(Prefs * prefs, char const * path)
{
const char ** p;