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Date: Wed, 8 Jun 2011 01:08:03 -0400
From: Arnaud Lacombe <lacombar@...il.com>
To: linux-kbuild@...r.kernel.org
Cc: Michal Marek <mmarek@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2] kconfig: introduce specialized printer
Hi,
On Mon, May 30, 2011 at 9:26 PM, Arnaud Lacombe <lacombar@...il.com> wrote:
> Hi,
>
> On Sun, May 15, 2011 at 11:42 PM, Arnaud Lacombe <lacombar@...il.com> wrote:
>> Make conf_write_symbol() grammar agnostic to be able to use it from different
>> code path. These path pass a printer callback which will print a symbol's name
>> and its value in different format.
>>
>> conf_write_symbol()'s job become mostly only to prepare a string for the
>> printer. This avoid to have to pass specialized flag to generic
>> functions
>>
> ping ?
>
ping^2 ?
- Arnaud
> - Arnaud
>
>> Signed-off-by: Arnaud Lacombe <lacombar@...il.com>
>> ---
>> scripts/kconfig/confdata.c | 268 +++++++++++++++++++++++++++----------------
>> scripts/kconfig/lkc.h | 5 +
>> scripts/kconfig/lkc_proto.h | 1 +
>> scripts/kconfig/symbol.c | 46 +++++++-
>> 4 files changed, 219 insertions(+), 101 deletions(-)
>>
>> History:
>> v2: Address Michal's comment in msg-id <4D10D7DF.7040903@...e.cz>:
>> - add brief comment before each printer
>> - introduce a `skip_unset' variable in kconfig printer
>> - merge inner switch in an if() statement
>> - annotate fallthrough
>> - fix tristate printer behavior
>>
>> v1: cf. https://patchwork.kernel.org/patch/380631/
>>
>> diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
>> index 2bafd9a..46e92e9 100644
>> --- a/scripts/kconfig/confdata.c
>> +++ b/scripts/kconfig/confdata.c
>> @@ -417,64 +417,176 @@ int conf_read(const char *name)
>> return 0;
>> }
>>
>> -/* Write a S_STRING */
>> -static void conf_write_string(bool headerfile, const char *name,
>> - const char *str, FILE *out)
>> +/*
>> + * Kconfig configuration printer
>> + *
>> + * This printer is used when generating the resulting configuration after
>> + * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
>> + * passing a non-NULL argument to the printer.
>> + *
>> + */
>> +static void
>> +kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
>> {
>> - int l;
>> - if (headerfile)
>> - fprintf(out, "#define %s%s \"", CONFIG_, name);
>> - else
>> - fprintf(out, "%s%s=\"", CONFIG_, name);
>> -
>> - while (1) {
>> - l = strcspn(str, "\"\\");
>> +
>> + switch (sym->type) {
>> + case S_BOOLEAN:
>> + case S_TRISTATE:
>> + if (*value == 'n') {
>> + bool skip_unset = (arg != NULL);
>> +
>> + if (!skip_unset)
>> + fprintf(fp, "# %s%s is not set\n",
>> + CONFIG_, sym->name);
>> + return;
>> + }
>> + break;
>> + default:
>> + break;
>> + }
>> +
>> + fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
>> +}
>> +
>> +static void
>> +kconfig_print_comment(FILE *fp, const char *value, void *arg)
>> +{
>> + const char *p = value;
>> + size_t l;
>> +
>> + for (;;) {
>> + l = strcspn(p, "\n");
>> + fprintf(fp, "#");
>> if (l) {
>> - xfwrite(str, l, 1, out);
>> - str += l;
>> + fprintf(fp, " ");
>> + fwrite(p, l, 1, fp);
>> + p += l;
>> }
>> - if (!*str)
>> + fprintf(fp, "\n");
>> + if (*p++ == '\0')
>> break;
>> - fprintf(out, "\\%c", *str++);
>> }
>> - fputs("\"\n", out);
>> }
>>
>> -static void conf_write_symbol(struct symbol *sym, FILE *out, bool write_no)
>> +static struct conf_printer kconfig_printer_cb =
>> {
>> - const char *str;
>> + .print_symbol = kconfig_print_symbol,
>> + .print_comment = kconfig_print_comment,
>> +};
>> +
>> +/*
>> + * Header printer
>> + *
>> + * This printer is used when generating the `include/generated/autoconf.h' file.
>> + */
>> +static void
>> +header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
>> +{
>> + const char *suffix = "";
>>
>> switch (sym->type) {
>> case S_BOOLEAN:
>> case S_TRISTATE:
>> - switch (sym_get_tristate_value(sym)) {
>> - case no:
>> - if (write_no)
>> - fprintf(out, "# %s%s is not set\n",
>> - CONFIG_, sym->name);
>> - break;
>> - case mod:
>> - fprintf(out, "%s%s=m\n", CONFIG_, sym->name);
>> - break;
>> - case yes:
>> - fprintf(out, "%s%s=y\n", CONFIG_, sym->name);
>> - break;
>> + switch (*value) {
>> + case 'n':
>> + return;
>> + case 'm':
>> + suffix = "_MODULE";
>> + /* FALLTHROUGH */
>> + default:
>> + value = "1";
>> }
>> break;
>> - case S_STRING:
>> - conf_write_string(false, sym->name, sym_get_string_value(sym), out);
>> - break;
>> - case S_HEX:
>> - case S_INT:
>> - str = sym_get_string_value(sym);
>> - fprintf(out, "%s%s=%s\n", CONFIG_, sym->name, str);
>> + default:
>> break;
>> + }
>> +
>> + fprintf(fp, "#define %s%s%s %s\n",
>> + CONFIG_, sym->name, suffix, value);
>> +}
>> +
>> +static void
>> +header_print_comment(FILE *fp, const char *value, void *arg)
>> +{
>> + const char *p = value;
>> + size_t l;
>> +
>> + fprintf(fp, "/*\n");
>> + for (;;) {
>> + l = strcspn(p, "\n");
>> + fprintf(fp, " *");
>> + if (l) {
>> + fprintf(fp, " ");
>> + fwrite(p, l, 1, fp);
>> + p += l;
>> + }
>> + fprintf(fp, "\n");
>> + if (*p++ == '\0')
>> + break;
>> + }
>> + fprintf(fp, " */\n");
>> +}
>> +
>> +static struct conf_printer header_printer_cb =
>> +{
>> + .print_symbol = header_print_symbol,
>> + .print_comment = header_print_comment,
>> +};
>> +
>> +/*
>> + * Tristate printer
>> + *
>> + * This printer is used when generating the `include/config/tristate.conf' file.
>> + */
>> +static void
>> +tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
>> +{
>> +
>> + if (sym->type == S_TRISTATE && *value != 'n')
>> + fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
>> +}
>> +
>> +static struct conf_printer tristate_printer_cb =
>> +{
>> + .print_symbol = tristate_print_symbol,
>> + .print_comment = kconfig_print_comment,
>> +};
>> +
>> +static void conf_write_symbol(FILE *fp, struct symbol *sym,
>> + struct conf_printer *printer, void *printer_arg)
>> +{
>> + const char *str;
>> +
>> + switch (sym->type) {
>> case S_OTHER:
>> case S_UNKNOWN:
>> break;
>> + case S_STRING:
>> + str = sym_get_string_value(sym);
>> + str = sym_escape_string_value(str);
>> + printer->print_symbol(fp, sym, str, printer_arg);
>> + free((void *)str);
>> + break;
>> + default:
>> + str = sym_get_string_value(sym);
>> + printer->print_symbol(fp, sym, str, printer_arg);
>> }
>> }
>>
>> +static void
>> +conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
>> +{
>> + char buf[256];
>> +
>> + snprintf(buf, sizeof(buf),
>> + "\n"
>> + "Automatically generated file; DO NOT EDIT.\n"
>> + "%s\n",
>> + rootmenu.prompt->text);
>> +
>> + printer->print_comment(fp, buf, printer_arg);
>> +}
>> +
>> /*
>> * Write out a minimal config.
>> * All values that has default values are skipped as this is redundant.
>> @@ -531,7 +643,7 @@ int conf_write_defconfig(const char *filename)
>> goto next_menu;
>> }
>> }
>> - conf_write_symbol(sym, out, true);
>> + conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
>> }
>> next_menu:
>> if (menu->list != NULL) {
>> @@ -596,11 +708,7 @@ int conf_write(const char *name)
>> if (!out)
>> return 1;
>>
>> - fprintf(out, _("#\n"
>> - "# Automatically generated make config: don't edit\n"
>> - "# %s\n"
>> - "#\n"),
>> - rootmenu.prompt->text);
>> + conf_write_heading(out, &kconfig_printer_cb, NULL);
>>
>> if (!conf_get_changed())
>> sym_clear_all_valid();
>> @@ -621,8 +729,8 @@ int conf_write(const char *name)
>> if (!(sym->flags & SYMBOL_WRITE))
>> goto next;
>> sym->flags &= ~SYMBOL_WRITE;
>> - /* Write config symbol to file */
>> - conf_write_symbol(sym, out, true);
>> +
>> + conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
>> }
>>
>> next:
>> @@ -771,7 +879,6 @@ out:
>> int conf_write_autoconf(void)
>> {
>> struct symbol *sym;
>> - const char *str;
>> const char *name;
>> FILE *out, *tristate, *out_h;
>> int i;
>> @@ -800,68 +907,23 @@ int conf_write_autoconf(void)
>> return 1;
>> }
>>
>> - fprintf(out, "#\n"
>> - "# Automatically generated make config: don't edit\n"
>> - "# %s\n"
>> - "#\n",
>> - rootmenu.prompt->text);
>> - fprintf(tristate, "#\n"
>> - "# Automatically generated - do not edit\n"
>> - "\n");
>> - fprintf(out_h, "/*\n"
>> - " * Automatically generated C config: don't edit\n"
>> - " * %s\n"
>> - " */\n",
>> - rootmenu.prompt->text);
>> + conf_write_heading(out, &kconfig_printer_cb, NULL);
>> +
>> + conf_write_heading(tristate, &tristate_printer_cb, NULL);
>> +
>> + conf_write_heading(out_h, &header_printer_cb, NULL);
>>
>> for_all_symbols(i, sym) {
>> sym_calc_value(sym);
>> if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
>> continue;
>>
>> - /* write symbol to config file */
>> - conf_write_symbol(sym, out, false);
>> + /* write symbol to auto.conf, tristate and header files */
>> + conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
>>
>> - /* update autoconf and tristate files */
>> - switch (sym->type) {
>> - case S_BOOLEAN:
>> - case S_TRISTATE:
>> - switch (sym_get_tristate_value(sym)) {
>> - case no:
>> - break;
>> - case mod:
>> - fprintf(tristate, "%s%s=M\n",
>> - CONFIG_, sym->name);
>> - fprintf(out_h, "#define %s%s_MODULE 1\n",
>> - CONFIG_, sym->name);
>> - break;
>> - case yes:
>> - if (sym->type == S_TRISTATE)
>> - fprintf(tristate,"%s%s=Y\n",
>> - CONFIG_, sym->name);
>> - fprintf(out_h, "#define %s%s 1\n",
>> - CONFIG_, sym->name);
>> - break;
>> - }
>> - break;
>> - case S_STRING:
>> - conf_write_string(true, sym->name, sym_get_string_value(sym), out_h);
>> - break;
>> - case S_HEX:
>> - str = sym_get_string_value(sym);
>> - if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
>> - fprintf(out_h, "#define %s%s 0x%s\n",
>> - CONFIG_, sym->name, str);
>> - break;
>> - }
>> - case S_INT:
>> - str = sym_get_string_value(sym);
>> - fprintf(out_h, "#define %s%s %s\n",
>> - CONFIG_, sym->name, str);
>> - break;
>> - default:
>> - break;
>> - }
>> + conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
>> +
>> + conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
>> }
>> fclose(out);
>> fclose(tristate);
>> diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
>> index febf0c9..7b0db22 100644
>> --- a/scripts/kconfig/lkc.h
>> +++ b/scripts/kconfig/lkc.h
>> @@ -92,6 +92,11 @@ void sym_set_change_count(int count);
>> void sym_add_change_count(int count);
>> void conf_set_all_new_symbols(enum conf_def_mode mode);
>>
>> +struct conf_printer {
>> + void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
>> + void (*print_comment)(FILE *, const char *, void *);
>> +};
>> +
>> /* confdata.c and expr.c */
>> static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
>> {
>> diff --git a/scripts/kconfig/lkc_proto.h b/scripts/kconfig/lkc_proto.h
>> index 17342fe..47fe9c3 100644
>> --- a/scripts/kconfig/lkc_proto.h
>> +++ b/scripts/kconfig/lkc_proto.h
>> @@ -31,6 +31,7 @@ P(symbol_hash,struct symbol *,[SYMBOL_HASHSIZE]);
>> P(sym_lookup,struct symbol *,(const char *name, int flags));
>> P(sym_find,struct symbol *,(const char *name));
>> P(sym_expand_string_value,const char *,(const char *in));
>> +P(sym_escape_string_value, const char *,(const char *in));
>> P(sym_re_search,struct symbol **,(const char *pattern));
>> P(sym_type_name,const char *,(enum symbol_type type));
>> P(sym_calc_value,void,(struct symbol *sym));
>> diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
>> index a796c95..11417a2 100644
>> --- a/scripts/kconfig/symbol.c
>> +++ b/scripts/kconfig/symbol.c
>> @@ -751,7 +751,8 @@ const char *sym_get_string_value(struct symbol *sym)
>> case no:
>> return "n";
>> case mod:
>> - return "m";
>> + sym_calc_value(modules_sym);
>> + return (modules_sym->curr.tri == no) ? "n" : "m";
>> case yes:
>> return "y";
>> }
>> @@ -893,6 +894,49 @@ const char *sym_expand_string_value(const char *in)
>> return res;
>> }
>>
>> +const char *sym_escape_string_value(const char *in)
>> +{
>> + const char *p;
>> + size_t reslen;
>> + char *res;
>> + size_t l;
>> +
>> + reslen = strlen(in) + strlen("\"\"") + 1;
>> +
>> + p = in;
>> + for (;;) {
>> + l = strcspn(p, "\"\\");
>> + p += l;
>> +
>> + if (p[0] == '\0')
>> + break;
>> +
>> + reslen++;
>> + p++;
>> + }
>> +
>> + res = malloc(reslen);
>> + res[0] = '\0';
>> +
>> + strcat(res, "\"");
>> +
>> + p = in;
>> + for (;;) {
>> + l = strcspn(p, "\"\\");
>> + strncat(res, p, l);
>> + p += l;
>> +
>> + if (p[0] == '\0')
>> + break;
>> +
>> + strcat(res, "\\");
>> + strncat(res, p++, 1);
>> + }
>> +
>> + strcat(res, "\"");
>> + return res;
>> +}
>> +
>> struct symbol **sym_re_search(const char *pattern)
>> {
>> struct symbol *sym, **sym_arr = NULL;
>> --
>> 1.7.3.4.574.g608b.dirty
>>
>>
>
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