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https://github.com/tailix/libkernaux.git
synced 2025-03-31 17:25:22 -04:00
Implement backslash in command line parser
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parent
f4007c541f
commit
b2c10342f2
2 changed files with 127 additions and 0 deletions
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@ -7,6 +7,7 @@ enum State {
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FINAL,
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WHITESPACE,
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TOKEN,
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BACKSLASHED,
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};
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kernaux_bool kernaux_cmdline_parse(
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@ -52,6 +53,7 @@ kernaux_bool kernaux_cmdline_parse(
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switch (state) {
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case FINAL:
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break; // Case break; loop break after switch.
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case INITIAL:
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if (cur == '\0') {
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state = FINAL;
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@ -59,6 +61,15 @@ kernaux_bool kernaux_cmdline_parse(
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else if (cur == ' ') {
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state = WHITESPACE;
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}
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else if (cur == '\\') {
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if (*argc >= argv_count_max) {
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kernaux_strncpy(error_msg, "too many args", 13);
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goto fail;
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}
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state = BACKSLASHED;
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argv[(*argc)++] = buffer;
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}
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else {
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if (*argc >= argv_count_max) {
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kernaux_strncpy(error_msg, "too many args", 13);
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@ -76,12 +87,22 @@ kernaux_bool kernaux_cmdline_parse(
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++buffer_size;
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}
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break;
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case WHITESPACE:
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if (cur == '\0') {
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state = FINAL;
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}
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else if (cur == ' ') {
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}
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else if (cur == '\\') {
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if (*argc >= argv_count_max) {
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kernaux_strncpy(error_msg, "too many args", 13);
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goto fail;
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}
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state = BACKSLASHED;
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argv[(*argc)++] = buffer;
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}
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else {
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if (*argc >= argv_count_max) {
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kernaux_strncpy(error_msg, "too many args", 13);
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@ -99,6 +120,7 @@ kernaux_bool kernaux_cmdline_parse(
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++buffer_size;
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}
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break;
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case TOKEN:
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if (cur == '\0') {
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if (buffer_size >= arg_size_max) {
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@ -120,6 +142,9 @@ kernaux_bool kernaux_cmdline_parse(
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*(buffer++) = '\0';
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buffer_size = 0;
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}
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else if (cur == '\\') {
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state = BACKSLASHED;
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}
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else {
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if (buffer_size >= arg_size_max) {
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kernaux_strncpy(error_msg, "arg too long", 12);
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@ -130,6 +155,23 @@ kernaux_bool kernaux_cmdline_parse(
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++buffer_size;
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}
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break;
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case BACKSLASHED:
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if (cur == '\0') {
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kernaux_strncpy(error_msg, "EOL after backslash", 19);
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goto fail;
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}
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else {
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if (buffer_size >= arg_size_max) {
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kernaux_strncpy(error_msg, "arg too long", 12);
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goto fail;
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}
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state = TOKEN;
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*(buffer++) = cur;
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++buffer_size;
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}
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break;
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}
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if (state == FINAL) {
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@ -26,6 +26,54 @@ static const char *const argv_foo_bar[] = {"foo", "bar"};
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static const char *const argv_foo_bar_car[] = {"foo", "bar", "car"};
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static const char *const argv_space[] = {" "};
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static const char *const argv_backslash[] = {"\\"};
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static const char *const argv_foospace[] = {"foo "};
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static const char *const argv_foobackslash[] = {"foo\\"};
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static const char *const argv_spacefoo[] = {" foo"};
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static const char *const argv_backslashfoo[] = {"\\foo"};
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static const char *const argv_spacefoospace[] = {" foo "};
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static const char *const argv_backslashfoobackslash[] = {"\\foo\\"};
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static const char *const argv_foospacebar[] = {"foo bar"};
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static const char *const argv_foobackslashbar[] = {"foo\\bar"};
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static const char *const argv_spaceX3_X3[] = {" ", " ", " "};
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static const char *const argv_backslashX3_X3[] = {"\\\\\\", "\\\\\\", "\\\\\\"};
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static const char *const argv_spacefoo_bar[] = {" foo", "bar"};
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static const char *const argv_backslashfoo_bar[] = {"\\foo", "bar"};
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static const char *const argv_foospace_bar[] = {"foo ", "bar"};
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static const char *const argv_foobackslash_bar[] = {"foo\\", "bar"};
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static const char *const argv_spacefoospace_bar[] = {" foo ", "bar"};
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static const char *const argv_backslashfoobackslash_bar[] = {"\\foo\\", "bar"};
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static const char *const argv_foo_spacebar[] = {"foo", " bar"};
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static const char *const argv_foo_backslashbar[] = {"foo", "\\bar"};
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static const char *const argv_foo_barspace[] = {"foo", "bar "};
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static const char *const argv_foo_barbackslash[] = {"foo", "bar\\"};
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static const char *const argv_foo_spacebarspace[] = {"foo", " bar "};
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static const char *const argv_foo_backslashbarbackslash[] = {"foo", "\\bar\\"};
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int main()
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{
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test("", 0, 0, true, "", 0, argv0);
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@ -49,6 +97,43 @@ int main()
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test("foo bar car", 0, 3, false, "arg too long", 0, argv0);
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test("foo bar car", 2, 3, false, "arg too long", 0, argv0);
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test("\\ ", 0, 0, true, "", 1, argv_space);
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test("\\\\", 0, 0, true, "", 1, argv_backslash);
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test("foo\\ ", 0, 0, true, "", 1, argv_foospace);
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test("foo\\\\", 0, 0, true, "", 1, argv_foobackslash);
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test("\\ foo", 0, 0, true, "", 1, argv_spacefoo);
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test("\\\\foo", 0, 0, true, "", 1, argv_backslashfoo);
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test("\\ foo\\ ", 0, 0, true, "", 1, argv_spacefoospace);
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test("\\\\foo\\\\", 0, 0, true, "", 1, argv_backslashfoobackslash);
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test("foo\\ bar", 0, 0, true, "", 1, argv_foospacebar);
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test("foo\\\\bar", 0, 0, true, "", 1, argv_foobackslashbar);
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test("\\ foo bar", 0, 0, true, "", 2, argv_spacefoo_bar);
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test("\\\\foo bar", 0, 0, true, "", 2, argv_backslashfoo_bar);
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test("foo\\ bar", 0, 0, true, "", 2, argv_foospace_bar);
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test("foo\\\\ bar", 0, 0, true, "", 2, argv_foobackslash_bar);
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test("\\ foo\\ bar", 0, 0, true, "", 2, argv_spacefoospace_bar);
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test("\\\\foo\\\\ bar", 0, 0, true, "", 2, argv_backslashfoobackslash_bar);
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test("foo \\ bar", 0, 0, true, "", 2, argv_foo_spacebar);
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test("foo \\\\bar", 0, 0, true, "", 2, argv_foo_backslashbar);
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test("foo bar\\ ", 0, 0, true, "", 2, argv_foo_barspace);
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test("foo bar\\\\", 0, 0, true, "", 2, argv_foo_barbackslash);
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test("foo \\ bar\\ ", 0, 0, true, "", 2, argv_foo_spacebarspace);
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test("foo \\\\bar\\\\", 0, 0, true, "", 2, argv_foo_backslashbarbackslash);
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test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 3, 0, true, "", 3, argv_spaceX3_X3);
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test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 3, 0, true, "", 3, argv_backslashX3_X3);
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test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 0, 4, true, "", 3, argv_spaceX3_X3);
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test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 0, 4, true, "", 3, argv_backslashX3_X3);
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test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 3, 4, true, "", 3, argv_spaceX3_X3);
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test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 3, 4, true, "", 3, argv_backslashX3_X3);
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test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 2, 0, false, "too many args", 0, argv0);
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test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 2, 0, false, "too many args", 0, argv0);
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test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 0, 3, false, "arg too long", 0, argv0);
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test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 0, 3, false, "arg too long", 0, argv0);
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test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 2, 3, false, "arg too long", 0, argv0);
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test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 2, 3, false, "arg too long", 0, argv0);
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return 0;
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}
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