kconfig/util.c
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Aug 23 21:11:26 2011 +0200 (2011-08-23)
changeset 2891 f176fee535a0
parent 943 1cca90ce0481
permissions -rw-r--r--
cc/gcc: add 'cflags' paramater to the core backend

As the core backend is used to generate the bare-metal compiler,
we need to pass it the host CFLAGS.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
     1 /*
     2  * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
     3  * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
     4  *
     5  * Released under the terms of the GNU GPL v2.0.
     6  */
     7 
     8 #include <string.h>
     9 #include "lkc.h"
    10 
    11 /* file already present in list? If not add it */
    12 struct file *file_lookup(const char *name)
    13 {
    14 	struct file *file;
    15 	const char *file_name = sym_expand_string_value(name);
    16 
    17 	for (file = file_list; file; file = file->next) {
    18 		if (!strcmp(name, file->name)) {
    19 			free((void *)file_name);
    20 			return file;
    21 		}
    22 	}
    23 
    24 	file = malloc(sizeof(*file));
    25 	memset(file, 0, sizeof(*file));
    26 	file->name = file_name;
    27 	file->next = file_list;
    28 	file_list = file;
    29 	return file;
    30 }
    31 
    32 /* write a dependency file as used by kbuild to track dependencies */
    33 int file_write_dep(const char *name)
    34 {
    35 	struct symbol *sym, *env_sym;
    36 	struct expr *e;
    37 	struct file *file;
    38 	FILE *out;
    39 
    40 	if (!name)
    41 		name = ".kconfig.d";
    42 	out = fopen("..config.tmp", "w");
    43 	if (!out)
    44 		return 1;
    45 	fprintf(out, "deps_config := \\\n");
    46 	for (file = file_list; file; file = file->next) {
    47 		if (file->next)
    48 			fprintf(out, "\t%s \\\n", file->name);
    49 		else
    50 			fprintf(out, "\t%s\n", file->name);
    51 	}
    52 	fprintf(out, "\n%s: \\\n"
    53 		     "\t$(deps_config)\n\n", conf_get_autoconfig_name());
    54 
    55 	expr_list_for_each_sym(sym_env_list, e, sym) {
    56 		struct property *prop;
    57 		const char *value;
    58 
    59 		prop = sym_get_env_prop(sym);
    60 		env_sym = prop_get_symbol(prop);
    61 		if (!env_sym)
    62 			continue;
    63 		value = getenv(env_sym->name);
    64 		if (!value)
    65 			value = "";
    66 		fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
    67 		fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
    68 		fprintf(out, "endif\n");
    69 	}
    70 
    71 	fprintf(out, "\n$(deps_config): ;\n");
    72 	fclose(out);
    73 	rename("..config.tmp", name);
    74 	return 0;
    75 }
    76 
    77 
    78 /* Allocate initial growable string */
    79 struct gstr str_new(void)
    80 {
    81 	struct gstr gs;
    82 	gs.s = malloc(sizeof(char) * 64);
    83 	gs.len = 64;
    84 	gs.max_width = 0;
    85 	strcpy(gs.s, "\0");
    86 	return gs;
    87 }
    88 
    89 /* Allocate and assign growable string */
    90 struct gstr str_assign(const char *s)
    91 {
    92 	struct gstr gs;
    93 	gs.s = strdup(s);
    94 	gs.len = strlen(s) + 1;
    95 	gs.max_width = 0;
    96 	return gs;
    97 }
    98 
    99 /* Free storage for growable string */
   100 void str_free(struct gstr *gs)
   101 {
   102 	if (gs->s)
   103 		free(gs->s);
   104 	gs->s = NULL;
   105 	gs->len = 0;
   106 }
   107 
   108 /* Append to growable string */
   109 void str_append(struct gstr *gs, const char *s)
   110 {
   111 	size_t l;
   112 	if (s) {
   113 		l = strlen(gs->s) + strlen(s) + 1;
   114 		if (l > gs->len) {
   115 			gs->s   = realloc(gs->s, l);
   116 			gs->len = l;
   117 		}
   118 		strcat(gs->s, s);
   119 	}
   120 }
   121 
   122 /* Append printf formatted string to growable string */
   123 void str_printf(struct gstr *gs, const char *fmt, ...)
   124 {
   125 	va_list ap;
   126 	char s[10000]; /* big enough... */
   127 	va_start(ap, fmt);
   128 	vsnprintf(s, sizeof(s), fmt, ap);
   129 	str_append(gs, s);
   130 	va_end(ap);
   131 }
   132 
   133 /* Retrieve value of growable string */
   134 const char *str_get(struct gstr *gs)
   135 {
   136 	return gs->s;
   137 }
   138