Init

Basically functional.

12 files changed, 1110 insertions, 0 deletions

diff --git a/.exrc b/.exrc
new file mode 100644
index 0000000..236a385
--- /dev/null
+++ b/.exrc
@@ -0,0 +1 @@
+let ch_syntax_for_h = 1
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b0b5a06
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.cache
+obj/
+build/
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..38db7ca
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,5 @@
+Copyright (c) 2021 Yaroslav de la Peña Smirnov
+
+This is free software, which you can redistribute and/or modify under the terms
+of the GNU Lesser General Public License, version 2.1 only. It is provided AS IS
+and WITHOUT ANY WARRANTY whatsoever. For more information read the LICENSE file.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..23632ca
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,458 @@
+GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8917d8e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,32 @@
+CC?=gcc
+RM:=rm -rf
+
+SRC_DIR:=src
+OBJ_DIR:=obj
+INC_DIRS=$(addprefix -iquote,include)
+
+PARCINI_SOURCES:=$(wildcard $(SRC_DIR)/*.c)
+PARCINI_OBJECTS:=$(PARCINI_SOURCES:%.c=$(OBJ_DIR)/%.o)
+BUILD_DIR:=build
+
+test: CFLAGS := -std=c99 -O0 -g -Wall -DDEBUG
+test: $(BUILD_DIR) tests/parcini
+
+tests/%: $(OBJ_DIR)/src/tests/%.o $(OBJ_DIR)/src/%.o $(PARCINI_OBJECTS)
+	$(CC) $(LDFLAGS) -o $(BUILD_DIR)/$@ $^
+	$(BUILD_DIR)/$@
+
+$(OBJ_DIR)/%.o: %.c
+	$(CC) -c $(CFLAGS) $(INC_DIRS) -o $@ $<
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)/tests
+	mkdir -p $(OBJ_DIR)/src/tests
+
+clean:
+	$(RM) $(OBJ_DIR)
+	$(RM) $(BUILD_DIR)
+
+.PHONY: clean test
+
+.PRECIOUS: $(OBJ_DIR)/tests/%.o $(OBJ_DIR)/%.o
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..51a7edd
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# parsini
diff --git a/compile_commands.json b/compile_commands.json
new file mode 100644
index 0000000..d713573
--- /dev/null
+++ b/compile_commands.json
@@ -0,0 +1,36 @@
+[
+ {
+  "directory": "/home/yaroslav/repos/personal/parcini",
+  "arguments": [
+   "cc",
+   "-c",
+   "-std=c99",
+   "-O0",
+   "-g",
+   "-Wall",
+   "-DDEBUG",
+   "-iquoteinclude",
+   "-o",
+   "obj/src/tests/parcini.o",
+   "src/tests/parcini.c"
+  ],
+  "file": "src/tests/parcini.c"
+ },
+ {
+  "directory": "/home/yaroslav/repos/personal/parcini",
+  "arguments": [
+   "cc",
+   "-c",
+   "-std=c99",
+   "-O0",
+   "-g",
+   "-Wall",
+   "-DDEBUG",
+   "-iquoteinclude",
+   "-o",
+   "obj/src/parcini.o",
+   "src/parcini.c"
+  ],
+  "file": "src/parcini.c"
+ }
+]
diff --git a/include/parcini.h b/include/parcini.h
new file mode 100644
index 0000000..3bcaf59
--- /dev/null
+++ b/include/parcini.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2021 Yaroslav de la Peña Smirnov
+ *
+ * Released under the GNU Lesser General Public License, version 2.1 only.
+ * For more information see `LICENSE' or visit
+ * https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
+ */
+#ifndef PARCINI_H
+#define PARCINI_H
+#include <stdio.h>
+#include <stdbool.h>
+#include <sys/types.h>
+
+/* You can choose to use a different character for comments (e.g. ';') at
+ * compile time */
+#ifndef PARCINI_COMMENT_CHAR
+#define PARCINI_COMMENT_CHAR '#'
+#endif
+
+/*
+ * An opaque structure that represents an instance of a "parcini" ini parser,
+ * used to parse a stream.
+ */
+typedef struct parcini parcini_t;
+
+/*
+ * All possible values to be returned by parcini_parse_next_line.
+ */
+enum parcini_result {
+	/* A line with only whitespace and/or a comment */
+	PARCINI_EMPTY_LINE,
+	/* There are no more lines to parse */
+	PARCINI_EOF,
+	/* A section. parcini_line.key shall be NULL and parcini_line.value.type
+	 * shalle be PARCINI_VALUE_NONE */
+	PARCINI_SECTION,
+	/* Key/value. parcini_line.key contains the name of the key, and
+	 * parcini_line.value contains the type and actual value. */
+	PARCINI_KEYVALUE,
+	/* A call to malloc/realloc failed. errno might be set */
+	PARCINI_MEMORY_ERROR,
+	/* An error other than EOF occured when attempting to read the stream. errno
+	 * might be set */
+	PARCINI_STREAM_ERROR,
+	/* What seemed to start as a key is incorrectly formated, and thus couldn't
+	 * be parsed correctly. */
+	PARCINI_KEY_PARSE_ERROR,
+	/* Where a value should have followed a key, there is none, or it is
+	 * incorrectly formated, and thus couldn't be parsed correctly. */
+	PARCINI_VALUE_PARSE_ERROR,
+	/* The value is an integer number that couldn't be parsed correctly due to
+	 * it being out of the range of a long int */
+	PARCINI_VALUE_RANGE_ERROR,
+	/* What seemed to be a line containing a section name, wasn't formatted
+	 * correctly and thus couldn't be parsed. */
+	PARCINI_SECTION_PARSE_ERROR,
+};
+
+enum parcini_value_type {
+	/* There is no value */
+	PARCINI_VALUE_NONE,
+	/* The value is long int */
+	PARCINI_VALUE_INTEGER,
+	/* The value is bool */
+	PARCINI_VALUE_BOOLEAN,
+	/* The value is pointer to char */
+	PARCINI_VALUE_STRING,
+};
+
+/*
+ * A tagged union-like structure representing a parsed value. Accessing a .value
+ * member for which the type is not set is undefined behaviour (beware of the
+ * char *, it could segfault your program).
+ */
+struct parcini_value {
+	enum parcini_value_type type;
+	union {
+		long int integer;
+		bool boolean;
+		char *string;
+	} value;
+};
+
+/*
+ * This structure should be passed as a pointer to parcini_parse_next_line so
+ * that it is filled with the parsed information. The pointers here MUST NOT be
+ * manually freed. See function parcini_parse_next_line for more details.
+ */
+struct parcini_line {
+	size_t lineno;
+	char *section;
+	char *key;
+	struct parcini_value value;
+};
+
+/*
+ * Parse the next line in the stream returning the kind of result/error of
+ * parsing and filling the parcini_line structure with the information that was
+ * extracted from the line, as well as the current section (including after
+ * parsing a key/value line) and line number.
+ * 
+ * If you need the information returned to last after the next call to this
+ * function, or after the destruction of the parcini_t parser instance, then you
+ * should copy it to a different variable/pointer before parsing the next
+ * line/freeing your parser instance. This data also MUST NOT be manually freed
+ * by the caller.
+ */
+enum parcini_result parcini_parse_next_line(parcini_t *, struct parcini_line *);
+
+/*
+ * Main function through which you initialize a parcini_t parser object, before
+ * you can parse the stream line by line.
+ */
+parcini_t *parcini_init(FILE *stream);
+
+/*
+ * Helper function to open a file and then initialize a parcini_t object with
+ * said as the source stream.
+ */
+parcini_t *parcini_from_file(const char *fpath);
+
+/*
+ * Helper function to initialize a parcini_t object with said string of said
+ * size open as a stream.
+ */
+parcini_t *parcini_from_string(const char *, const size_t);
+
+/*
+ * Free all memory related to the parcini_t instance. IMPORTANT: this will also
+ * close the stream passed to parcini_init, so if you manually opened a file and
+ * then passed it to parcini_init, it WILL NOT be valid after a call to
+ * parcini_destroy.
+ */
+void parcini_destroy(parcini_t *);
+
+#endif
diff --git a/include/tests/tests.h b/include/tests/tests.h
new file mode 100644
index 0000000..8c89fcc
--- /dev/null
+++ b/include/tests/tests.h
@@ -0,0 +1,45 @@
+#ifndef TESTS_H
+#define TESTS_H
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef NOCOLOR
+#define TBLD "\033[1m"
+#define TRED "\033[31m"
+#define TGRN "\033[32m"
+#define TBLU "\033[34m"
+#define TRST "\033[0m"
+#else
+#define TBLD ""
+#define TRED ""
+#define TGRN ""
+#define TBLU ""
+#define TRST ""
+#endif
+
+#define RUN_TEST(test_func) \
+	printf("%s:\t", #test_func); \
+	fflush(stdout); \
+	test_func(); \
+	printf(TGRN "OK!\n" TRST)
+
+#define INIT_TESTS() \
+	printf(TBLD "running %s tests\n" TRST, __FILE__)
+
+#define FAIL_TEST(reason) \
+	printf(TBLD TRED "FAIL!\n" TRST); \
+	printf("%s:%d: %s: ", __FILE__, __LINE__, __func__); \
+	printf(reason); \
+	abort()
+
+#define asserteq(a, b) \
+	if (a != b) { \
+		FAIL_TEST("assertion " TBLD TBLU #a " == " #b TRST " failed\n"); \
+	}
+
+#define assertneq(a, b) \
+	if (a == b) { \
+		FAIL_TEST("assertion " TBLD TBLU #a " != " #b TRST " failed\n"); \
+	}
+
+#endif
diff --git a/src/parcini.c b/src/parcini.c
new file mode 100644
index 0000000..6c19d7a
--- /dev/null
+++ b/src/parcini.c
@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2021 Yaroslav de la Peña Smirnov
+ *
+ * Released under the GNU Lesser General Public License, version 2.1 only.
+ * For more information see `LICENSE' or visit
+ * https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
+ */
+#define _POSIX_C_SOURCE 200809L
+#include "parcini.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+struct parcini {
+	FILE *stream;
+	char *last_section;
+	size_t last_section_n;
+	char *last_line;
+	size_t last_line_n;
+	size_t last_line_no;
+};
+
+/*
+ * Strip string "slice" of any whitespace characters to the right until the next
+ * non-whitespace character.
+ */
+static void
+rstrip(const char *start, char **end) {
+	while (start < *end && isspace(**end)) {
+		**end = '\0';
+		*end -= 1;
+	}
+}
+
+/*
+ * Ignore whitespace characters on the left, moving the pointer until we find
+ * a non-whitespace character.
+ */
+static void
+lskip(char **start) {
+	while (**start && isspace(**start)) {
+		*start += 1;
+	}
+}
+
+/*
+ * Make a copy of the string "slice" located from pointer start to pointer end,
+ * copying it over to dst, reallocating memory if needed, and terminating it
+ * with a null character.
+ */
+static char *
+slicecpy(char *start, char *end, char **dst, size_t *dstn)
+{
+	size_t srcn = end - start + 1;
+	if (*dst == NULL) {
+		*dst = malloc(srcn + 1);
+	}
+	if (*dstn < srcn) {
+		char *newptr = realloc(*dst, srcn + 1);
+		if (newptr == NULL) {
+			return NULL;
+		}
+		*dstn = srcn + 1;
+		*dst = newptr;
+	}
+	for (size_t i = 0; i < srcn; i++) {
+		(*dst)[i] = start[i];
+	}
+	(*dst)[srcn] = '\0';
+
+	return *dst;
+}
+
+enum parcini_result
+parcini_parse_next_line(parcini_t *parser, struct parcini_line *parsed)
+{
+	ssize_t nread = getline(&parser->last_line, &parser->last_line_n,
+			parser->stream);
+
+	if (nread < 0) {
+		if (feof(parser->stream)) {
+			return PARCINI_EOF;
+		}
+		return PARCINI_STREAM_ERROR;
+	}
+
+	parsed->lineno = ++parser->last_line_no;
+	if (nread > 0) {
+		char *start = parser->last_line;
+		if (*start == PARCINI_COMMENT_CHAR) {
+			goto empty;
+		}
+
+		if (*start == '[') {
+			char *end = strchr(start, ']');
+			if (!end) {
+				return PARCINI_SECTION_PARSE_ERROR;
+			}
+			char *cmnt = strchr(start, PARCINI_COMMENT_CHAR);
+			if (cmnt && cmnt < end) {
+				return PARCINI_SECTION_PARSE_ERROR;
+			}
+			if (!slicecpy(start + 1, end - 1, &parser->last_section,
+						&parser->last_section_n)) {
+				return PARCINI_MEMORY_ERROR;
+			}
+			parsed->section = parser->last_section;
+			parsed->key = NULL;
+			parsed->value.type = PARCINI_VALUE_NONE;
+			return PARCINI_SECTION;
+		}
+
+		parsed->section = parser->last_section;
+		char *delim = strchr(start, '=');
+		if (delim) {
+			char *cmnt = strchr(start, PARCINI_COMMENT_CHAR);
+			if (cmnt && cmnt < delim) {
+				return PARCINI_KEY_PARSE_ERROR;
+			}
+			char *end = delim;
+			*end = '\0';
+			end -= 1;
+			rstrip(start, &end);
+			if (start == end) {
+				return PARCINI_KEY_PARSE_ERROR;
+			}
+			parsed->key = start;
+
+			start = delim + 1;
+			lskip(&start);
+			end = parser->last_line + nread - 1;
+			if (*start == '"') {
+				delim = strrchr(start, '"');
+				if (!delim) {
+					return PARCINI_VALUE_PARSE_ERROR;
+				}
+				if (delim != end) {
+					char *postq = delim + 1;
+					lskip(&postq);
+					if (*postq && *postq != PARCINI_COMMENT_CHAR) {
+						return PARCINI_VALUE_PARSE_ERROR;
+					}
+				}
+				*delim = '\0';
+				parsed->value.type = PARCINI_VALUE_STRING;
+				parsed->value.value.string = start + 1;
+				return PARCINI_KEYVALUE;
+			}
+
+			if (cmnt) {
+				if (start == cmnt) {
+					return PARCINI_VALUE_PARSE_ERROR;
+				}
+				*cmnt = '\0';
+				end = cmnt - 1;
+			}
+			rstrip(start, &end);
+
+			if (!strcmp(start, "yes") || !strcmp(start, "true")) {
+				parsed->value.type = PARCINI_VALUE_BOOLEAN;
+				parsed->value.value.boolean = true;
+				return PARCINI_KEYVALUE;
+			}
+			if (!strcmp(start, "no") || !strcmp(start, "false")) {
+				parsed->value.type = PARCINI_VALUE_BOOLEAN;
+				parsed->value.value.boolean = false;
+				return PARCINI_KEYVALUE;
+			}
+
+			char *invalid = NULL;
+			errno = ETIME;
+			long int no = strtol(start, &invalid, 0);
+			if ((*invalid && *invalid != '\n' && *invalid != '\r')
+					|| errno == EINVAL) {
+				return PARCINI_VALUE_PARSE_ERROR;
+			}
+			if (errno == ERANGE) {
+				return PARCINI_VALUE_RANGE_ERROR;
+			}
+			parsed->value.type = PARCINI_VALUE_INTEGER;
+			parsed->value.value.integer = no;
+			return PARCINI_KEYVALUE;
+		}
+
+		lskip(&start);
+		if (*start) {
+			return PARCINI_KEY_PARSE_ERROR;
+		}
+	}
+
+empty:
+	return PARCINI_EMPTY_LINE;
+}
+
+parcini_t *
+parcini_init(FILE *stream)
+{
+	parcini_t *parser = calloc(1, sizeof *parser);
+	if (parser != NULL) {
+		parser->stream = stream;
+		parser->last_section = strdup("");
+		parser->last_section_n = 2;
+	}
+
+	return parser;
+}
+
+parcini_t *
+parcini_from_file(const char *fpath)
+{
+	FILE *f = NULL;
+	f = fopen(fpath, "r");
+	if (f == NULL) {
+		return NULL;
+	}
+	return parcini_init(f);
+}
+
+parcini_t *
+parcini_from_string(const char *str, const size_t len)
+{
+	FILE *stream = fmemopen((void *)str, len, "r");
+	if (stream == NULL) {
+		return NULL;
+	}
+	return parcini_init(stream);
+}
+
+void
+parcini_destroy(parcini_t *parser)
+{
+	fclose(parser->stream);
+	free(parser->last_line);
+	free(parser->last_section);
+	free(parser);
+}
diff --git a/src/tests/parcini.c b/src/tests/parcini.c
new file mode 100644
index 0000000..f53ab09
--- /dev/null
+++ b/src/tests/parcini.c
@@ -0,0 +1,138 @@
+#include "tests/tests.h"
+#include "parcini.h"
+
+#include <string.h>
+
+#define PARCINI_TEST_FILE "test.ini"
+
+void
+test_parcini_parse_file(void)
+{
+	parcini_t *parser = parcini_from_file(PARCINI_TEST_FILE);
+	struct parcini_line line;
+	enum parcini_result res;
+
+	/* line 1 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 1);
+	asserteq(strcmp(line.section, ""), 0);
+	asserteq(strcmp(line.key, "key1"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_STRING);
+	asserteq(strcmp(line.value.value.string, "string"), 0);
+
+	/* line 2 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 2);
+	asserteq(strcmp(line.section, ""), 0);
+	asserteq(strcmp(line.key, "key2"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_INTEGER);
+	asserteq(line.value.value.integer, -1520);
+
+	/* line 3 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 3);
+	asserteq(strcmp(line.section, ""), 0);
+	asserteq(strcmp(line.key, "key3"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_BOOLEAN);
+	asserteq(line.value.value.boolean, false);
+
+	/* line 4 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_EMPTY_LINE);
+	asserteq(line.lineno, 4);
+
+	/* line 5 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_EMPTY_LINE);
+	asserteq(line.lineno, 5);
+
+	/* line 6 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_SECTION);
+	asserteq(line.lineno, 6);
+	asserteq(strcmp(line.section, "asection"), 0);
+	asserteq(line.key, NULL);
+	asserteq(line.value.type, PARCINI_VALUE_NONE);
+
+	/* line 7 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 7);
+	asserteq(strcmp(line.section, "asection"), 0);
+	asserteq(strcmp(line.key, "skey"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_STRING);
+	asserteq(strcmp(line.value.value.string, "ur 2 slow"), 0);
+
+	/* line 8 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_VALUE_PARSE_ERROR);
+	asserteq(line.lineno, 8);
+
+	/* line 9 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEY_PARSE_ERROR);
+	asserteq(line.lineno, 9);
+
+	/* line 10 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_VALUE_PARSE_ERROR);
+	asserteq(line.lineno, 10);
+
+	/* line 11 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_VALUE_RANGE_ERROR);
+	asserteq(line.lineno, 11);
+
+	/* line 12 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 12);
+	asserteq(strcmp(line.section, "asection"), 0);
+	asserteq(strcmp(line.key, "bool2"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_BOOLEAN);
+	asserteq(line.value.value.boolean, true);
+
+	/* line 13 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 13);
+	asserteq(strcmp(line.section, "asection"), 0);
+	asserteq(strcmp(line.key, "bool3"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_BOOLEAN);
+	asserteq(line.value.value.boolean, false);
+
+	/* line 14 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_KEYVALUE);
+	asserteq(line.lineno, 14);
+	asserteq(strcmp(line.section, "asection"), 0);
+	asserteq(strcmp(line.key, "bool3"), 0);
+	asserteq(line.value.type, PARCINI_VALUE_BOOLEAN);
+	asserteq(line.value.value.boolean, true);
+
+	/* line 15 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_EMPTY_LINE);
+	asserteq(line.lineno, 15);
+
+	/* line 16 */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_SECTION_PARSE_ERROR);
+	asserteq(line.lineno, 16);
+
+	/* EOF */
+	res = parcini_parse_next_line(parser, &line);
+	asserteq(res, PARCINI_EOF);
+
+	parcini_destroy(parser);
+}
+
+int
+main(void)
+{
+	INIT_TESTS();
+	RUN_TEST(test_parcini_parse_file);
+}
diff --git a/test.ini b/test.ini
new file mode 100644
index 0000000..f8823b6
--- /dev/null
+++ b/test.ini
@@ -0,0 +1,16 @@
+key1 = "string"
+key2= -1520
+key3=no
+
+# this is a comment
+[asection]
+skey="ur 2 slow" #with comment
+bad=#this is not good
+bad2$#this is also bad
+bad3 = 2 and this
+range=3000000000000000000000 #this should be enough
+bool2=yes
+bool3=false
+bool3 = true
+	 
+[bad section