From 621804989bdcc2683047bfa5e3e28de21a6b811e Mon Sep 17 00:00:00 2001 From: rexy712 Date: Sat, 24 Nov 2018 09:01:13 -0800 Subject: [PATCH] initial commit --- .gitignore | 7 + CMakeLists.txt | 23 ++ LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++ include/config.h.in | 26 ++ include/rjp.h | 96 +++++++ src/rjp.c | 589 ++++++++++++++++++++++++++++++++++++++ 6 files changed, 1415 insertions(+) create mode 100644 .gitignore create mode 100644 CMakeLists.txt create mode 100644 LICENSE create mode 100644 include/config.h.in create mode 100644 include/rjp.h create mode 100644 src/rjp.c diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d1adf5a --- /dev/null +++ b/.gitignore @@ -0,0 +1,7 @@ +*.o +*.d +tester +tester.exe +*.swp +build +include/config.h diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..f4e0109 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,23 @@ +include(CMakeDependentOption) +include(GNUInstallDirs) + +cmake_minimum_required(VERSION 3.0.2) +project(rjp) +set(rjp_VERSION_MAJOR 0) +set(rjp_VERSION_MINOR 1) +set(INCLUDE_PATH ${CMAKE_SOURCE_DIR}/include) +configure_file( + "${INCLUDE_PATH}/config.h.in" + "${INCLUDE_PATH}/config.h" +) +include_directories("${INCLUDE_PATH}") + +add_library (rjp STATIC src/rjp.c) +set_target_properties(rjp PROPERTIES PUBLIC_HEADER ${INCLUDE_PATH}/rjp.h) + +install(TARGETS rjp + ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} + PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} +) + +add_custom_target(uninstall cat install_manifest.txt | xargs rm) diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..a93e836 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. + diff --git a/include/config.h.in b/include/config.h.in new file mode 100644 index 0000000..43a5968 --- /dev/null +++ b/include/config.h.in @@ -0,0 +1,26 @@ +/** + rjp + Copyright (C) 2018 rexy712 + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#ifndef CONFIG_H +#define CONFIG_H + +#define RJP_VERSION_MAJOR @rjp_VERSION_MAJOR@ +#define RJP_VERSION_MINOR @rjp_VERSION_MINOR@ + +#endif + diff --git a/include/rjp.h b/include/rjp.h new file mode 100644 index 0000000..f14ace8 --- /dev/null +++ b/include/rjp.h @@ -0,0 +1,96 @@ +/** + rjp + Copyright (C) 2018 rexy712 + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#ifndef RJP_H +#define RJP_H + +#include //size_t + +#ifdef __cplusplus +extern "C"{ +#endif +//type of data +enum JSON_type{ + json_object, + json_string, + json_integer, + json_dfloat, + json_boolean, + json_array, + json_null +}; + +enum JSON_flags{ + json_flag_string = 1, //in a string + json_flag_comment = 2, //in a comment block + json_flag_search_name = 4, //looking for key/value pair + json_flag_escape = 16 //escaped character in a string +}; + +//keep track of string length +struct JSON_string{ + char* value; + size_t length; +}; + +//keep a linked list of all members of a given object +struct JSON_object{ + struct JSON_object_member* members; + size_t num_members; +}; + +//keep array plus length +struct JSON_array{ + struct JSON_array_element* elements; + size_t num_elements; +}; + +//hold any json data type +struct JSON_value{ + enum JSON_type type; + union{ + long integer; + double dfloat; + char boolean; + struct JSON_object object; + struct JSON_string string; + struct JSON_array array; + }; + struct JSON_value* parent; +}; + +struct JSON_array_element{ + struct JSON_value value; + struct JSON_array_element* next; +}; + +//A member of an object +struct JSON_object_member{ + struct JSON_string name; + struct JSON_value value; + struct JSON_object_member* next; +}; + +void free_json(struct JSON_value* root); +struct JSON_value* parse_json(const char* str); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/src/rjp.c b/src/rjp.c new file mode 100644 index 0000000..3f9a586 --- /dev/null +++ b/src/rjp.c @@ -0,0 +1,589 @@ +/** + rjp + Copyright (C) 2018 rexy712 + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +//TODO: Scientific notation +//TODO: \e escape sequence in strings + +#include "rjp.h" +#include //strncpy +#include //malloc, calloc +#include //fprintf, stderr + +#ifdef __GNUC__ +#define MAYBE_UNUSED __attribute__((unused)) +#else +#define MAYBE_UNUSED +#endif + +struct JSON_state{ + int in_array; + int search_target; +}; + +//types of searches in the text +enum json_search_target{ + json_key, + json_colon, + json_comma, + json_value +}; + +//Determine if the character is valid whitespace +static int is_whitespace(char c){ + return c == ' ' || c == '\n' || c == '\r' || c == '\t'; +} +//allocate a member of the object as a linked list member and assign a name +MAYBE_UNUSED static void add_member(struct JSON_value* j, const char* str, size_t len){ + ++j->object.num_members; + struct JSON_object_member* prev = j->object.members; + j->object.members = calloc(1, sizeof(struct JSON_object_member)); + j->object.members->name.value = malloc(len + 1); + j->object.members->name.length = len; + strncpy(j->object.members->name.value, str, len); + j->object.members->name.value[len] = 0; + j->object.members->next = prev; +} +//add an element to an array +static void add_element(struct JSON_value* j){ + ++j->array.num_elements; + struct JSON_array_element* prev = j->array.elements; + j->array.elements = calloc(1, sizeof(struct JSON_array_element)); + j->array.elements->next = prev; +} +//create member of the object as a linked list member and assign a name with no name allocation +static void add_member_no_alloc(struct JSON_value* j, char* str, size_t len){ + ++j->object.num_members; + struct JSON_object_member* prev = j->object.members; + j->object.members = calloc(1, sizeof(struct JSON_object_member)); + j->object.members->name.value = str; + j->object.members->name.length = len; + j->object.members->next = prev; +} + +static struct JSON_value* add_element_to_array(struct JSON_value* curr, struct JSON_state* state, struct JSON_value* element){ + struct JSON_value* tmp = &curr->object.members->value; + for(int i = state->in_array-1;i > 0;--i, tmp = &tmp->array.elements->value); + add_element(tmp); + tmp->array.elements->value = *element; + return &tmp->array.elements->value; +} + +//Assign object characteristics to previously allocated JSON_value +static struct JSON_value* add_object(struct JSON_value* curr, struct JSON_state* state){ + if(!curr){ + curr = calloc(1, sizeof(struct JSON_value)); + curr->type = json_object; + return curr; + } + struct JSON_value new_object = {.type = json_object, .integer = 0, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_object); + curr->object.members->value = new_object; + return &curr->object.members->value; +} +//Assign array characteristics to previously allocated JSON_value +static struct JSON_value* add_array(struct JSON_value* curr, struct JSON_state* state){ + struct JSON_value new_array = {.type = json_array, .array = {.num_elements = 0, .elements = NULL}, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_array); + curr->object.members->value = new_array; + return &curr->object.members->value; +} +//Assign string characteristics to previously allocated JSON_value with no string allocation +static struct JSON_value* add_string_no_alloc(struct JSON_value* curr, char* str, int len, struct JSON_state* state){ + struct JSON_value new_string = {.type = json_string, .string = {.value = str, .length = len}, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_string); + curr->object.members->value = new_string; + return &curr->object.members->value; +} +//Assign double characteristics to previously allocated JSON_value +static struct JSON_value* add_double(struct JSON_value* curr, double value, struct JSON_state* state){ + struct JSON_value new_double = {.type = json_dfloat, .dfloat = value, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_double); + curr->object.members->value = new_double; + return &curr->object.members->value; +} +//Assign integer characteristics to previously allocated JSON_value +static struct JSON_value* add_integer(struct JSON_value* curr, long value, struct JSON_state* state){ + struct JSON_value new_integer = {.type = json_integer, .integer = value, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_integer); + curr->object.members->value = new_integer; + return &curr->object.members->value; +} +static struct JSON_value* add_boolean(struct JSON_value* curr, int value, struct JSON_state* state){ + struct JSON_value new_boolean = {.type = json_boolean, .boolean = value, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_boolean); + curr->object.members->value = new_boolean; + return &curr->object.members->value; +} +static struct JSON_value* add_null(struct JSON_value* curr, struct JSON_state* state){ + struct JSON_value new_null = {.type = json_null, .integer = 0, .parent = curr}; + if(state->in_array) + return add_element_to_array(curr, state, &new_null); + curr->object.members->value = new_null; + return &curr->object.members->value; +} + +static void reverse_array_order(struct JSON_value* curr){ + struct JSON_array_element* tmp = curr->object.members->value.array.elements; + struct JSON_array_element* next = tmp->next; + struct JSON_array_element* new_start = next; + tmp->next = NULL; + while(new_start){ + next = next->next; + new_start->next = tmp; + tmp = new_start; + new_start = next; + } + curr->object.members->value.array.elements = tmp; +} +//since we save everything in reverse order, swap it around so it's all good +static void reverse_object_order(struct JSON_value* curr){ + struct JSON_object_member* tmp = curr->object.members; + struct JSON_object_member* next = tmp->next; + curr->object.members = next; + tmp->next = NULL; + while(curr->object.members){ + next = next->next; + curr->object.members->next = tmp; + tmp = curr->object.members; + curr->object.members = next; + } + curr->object.members = tmp; +} + +static void free_json_recurse(struct JSON_value* root); + +static void free_json_array(struct JSON_value* root){ + struct JSON_array_element* arr = root->array.elements; + for(struct JSON_array_element* i = arr;i != NULL;i = arr){ + arr = arr->next; + if(i->value.type == json_object){ + free_json_recurse(&i->value); + }else if(i->value.type == json_array){ + free_json_array(&i->value); + }else if(i->value.type == json_string){ + free(i->value.string.value); + } + free(i); + } +} +//Recursively free JSON objects +static void free_json_recurse(struct JSON_value* root){ + struct JSON_object_member* next; + for(struct JSON_object_member* m = root->object.members;m;m = next){ + next = m->next; + if(m->value.type == json_object) + free_json_recurse(&m->value); + else if(m->value.type == json_string) + free(m->value.string.value); + else if(m->value.type == json_array) + free_json_array(&m->value); + if(m->name.value) + free(m->name.value); + free(m); + } +} +//Same as recurse but also frees root node +void free_json(struct JSON_value* root){ + free_json_recurse(root); + free(root); +} + +MAYBE_UNUSED static int is_array_empty(struct JSON_value* curr){ + if(curr->object.members->value.type != json_array) + return 0; + return curr->object.members->value.array.num_elements == 0; +} + +#define syntax_error(msg, row, column)\ + do{fprintf(stderr, "Syntax error! %s (%i:%i)\n", msg, row, column);free_json(root);return NULL;}while(0) + +//Convert escape sequences in strings +static char* parse_string(struct JSON_value* root, const char* str, int* len, int* row, int* column){ + char* new_string; + ++(*column); //account for starting quotation mark + for(*len = 0;*(str+*len) != '"';++(*len), ++(*column)){ + if(*(str+*len) == '\\'){ + ++(*len); + ++(*column); + }else if(*(str+*len) == '\0'){ + *len = 1; + syntax_error("Unexpected EOF in string!", *row, *column); + }else if(*(str+*len) == '\n'){ + ++(*row); + *column = 0; + } + } + if(*len == 0){ + return NULL; + } + new_string = malloc(*len + 1); + new_string[*len] = 0; + for(int i = 0;*str != '"';++i,++str){ + if(*str == '\\'){ + ++str; + switch(*str){ + case '"': + new_string[i] = '"'; + break; + case 'n': + new_string[i] = '\n'; + break; + case 'r': + new_string[i] = '\r'; + break; + case 'b': + new_string[i] = '\b'; + break; + case '\\': + new_string[i] = '\\'; + break; + case 't': + new_string[i] = '\t'; + break; + case 'f': + new_string[i] = '\f'; + break; + default: + new_string[i] = *str; + break; + } + }else{ + new_string[i] = *str; + } + } + return new_string; +} + +#define MAX_DEPTH 16 +struct JSON_value* parse_json(const char* str){ + struct JSON_value* root = 0; + struct JSON_value* curr = 0; + int row = 1, column = 0; + int in_line_comment = 0; + int in_block_comment = 0; + + //keep track of where we are in a given subobject + struct JSON_state state_stack[MAX_DEPTH] = {0},*top = state_stack; + + //initially search for the root object + top->search_target = json_value; + top->in_array = 0; + + for(;*str != '\0';++str){ + char c = *str; + + //keep track of position in input file + if(c == '\n'){ + ++row; + column = 0; + }else{ + ++column; + } + + //Handle comments + if(in_line_comment){ + if(c == '\n') + in_line_comment = 0; + } + else if(in_block_comment){ + if(c == '*' && *(str+1) == '/'){ + in_block_comment = 0; + ++str; + } + } + else if(c == '/' && *(str+1) == '/'){ + in_line_comment = 1; + ++str; + } + else if(c == '/' && *(str+1) == '*'){ + in_block_comment = 1; + ++str; + } + + else if(top->search_target == json_key){ + //start of key + if(c == '"'){ + if(curr == NULL) + syntax_error("Key found outside of object definition!", row, column); + + int keylen; + char* new_string = parse_string(root, ++str, &keylen, &row, &column); + if(!new_string){ + if(!keylen) + syntax_error("Cannot have empty key name!", row, column); + return NULL; + } + add_member_no_alloc(curr, new_string, keylen); + str += keylen; + top->search_target = json_colon; + //end of this object (object is empty) + }else if(c == '}'){ + curr = curr->parent; + if(top != state_stack) + --top; + + //unrecognized character + }else if(!is_whitespace(c)){ + syntax_error("Unexpected character, expected '\"'!", row, column); + } + } + else if(top->search_target == json_colon){ + //colon after a key + if(c == ':'){ + top->search_target = json_value; + //unrecognized character + }else if(!is_whitespace(c)){ + syntax_error( "Unexpected character, expected ':'!", row, column); + } + } + else if(top->search_target == json_comma){ + //comma separating keys in an object or values in an array + if(c == ','){ + top->search_target = top->in_array ? json_value : json_key; + + //end of object + }else if(c == '}'){ + if(top->in_array){ + syntax_error("Unexpected end of object within array!", row, column); + } + reverse_object_order(curr); + curr = curr->parent; + if(top != state_stack) + --top; + //end of array + }else if(c == ']' && top->in_array){ + reverse_array_order(curr); + --top->in_array; + //unrecognized character + }else if(!is_whitespace(c)){ + syntax_error("Unexpected character, expected ','!", row, column); + } + } + else if(top->search_target == json_value){ + //object + if(c == '{'){ + if(!root){ + root = add_object(NULL, top); + curr = root; + top->search_target = json_key; + }else{ + curr = add_object(curr, top); + top->search_target = json_comma; + ++top; + top->in_array = 0; + top->search_target = json_key; + } + } + //something outside of any object + else if(!curr){ + syntax_error("Unexpected character outside of object definition!", row, column); + } + //arrays + else if(c == '['){ + add_array(curr, top); + ++top->in_array; + } + else if(c == ']' && top->in_array){ //empty array + --top->in_array; + top->search_target = json_comma; + } + //strings + else if(c == '"'){ + int vallen; + ++str; + char* new_string = parse_string(root, str, &vallen, &row, &column); + if(!new_string){ + if(vallen == 0){ + new_string = calloc(1, 1); + }else{ + return NULL; + } + } + add_string_no_alloc(curr, new_string, vallen, top); + str += vallen; + top->search_target = json_comma; + } + //numbers + else if((c >= '0' && c <= '9') || c == '-'){ + int numlen; + int floating = 0; //is an int or a double + for(numlen = 1;*(str+numlen) >= '0' && *(str+numlen) <= '9';++numlen); + if(*(str+numlen) == '.'){ //if we have a decimal, make it a double and continue parsing as a number + int i = ++numlen; + for(;*(str+numlen) >= '0' && *(str+numlen) <= '9';++numlen); + if(i == numlen){ //no number after decimal + syntax_error("Missing numerals after decimal place!", row, column); + } + floating = 1; + } + if(*(str+numlen) == '\0'){ //hit EOF early + syntax_error("Unexpected EOF before end of object!", row, column); + } + if(c == '-' && numlen == 1){ //only have a '-' with no numbers + syntax_error("Missing numerals ofter '-' sign!", row, column); + } + if(floating){ + add_double(curr, strtod(str, NULL), top); + }else{ + add_integer(curr, strtol(str, NULL, 10), top); + } + str += (numlen-1); + column += numlen; + top->search_target = json_comma; + } + //booleans and null + else if(!strncmp(str, "true", 4)){ + add_boolean(curr, 1, top); + str += 3; + top->search_target = json_comma; + }else if(!strncmp(str, "false", 5)){ + add_boolean(curr, 0, top); + str += 4; + top->search_target = json_comma; + }else if(!strncmp(str, "null", 4)){ + add_null(curr, top); + str += 3; + top->search_target = json_comma; + } + //unrecognized character + else if(!is_whitespace(c)){ + syntax_error("Unexpected character!", row, column); + } + } + } + return root; +} + +#undef syntax_error + +struct JSON_object_member* get_members(struct JSON_object* j){ + return j->members; +} +struct JSON_object_member* next_member(struct JSON_object_member* j){ + return j->next; +} +struct JSON_object* member_parent(struct JSON_object_member* j){ + return &j->value.parent->object; +} +struct JSON_value* get_member_value(struct JSON_object_member* j){ + return &j->value; +} +enum JSON_type get_member_type(struct JSON_object_member* j){ + return j->value.type; +} +enum JSON_type get_value_type(struct JSON_value* j){ + return j->type; +} + +void dump_json(struct JSON_object* root_obj); +void dump_array(struct JSON_array* root){ + struct JSON_array_element* element_list = root->elements; + for(;element_list != NULL;element_list = element_list->next){ + switch(element_list->value.type){ + case json_integer: + printf("integer: %li\n", element_list->value.integer); + break; + case json_dfloat: + printf("double: %lf\n", element_list->value.dfloat); + break; + case json_boolean: + printf("boolean: %i\n", element_list->value.boolean); + break; + case json_null: + printf("null\n"); + break; + case json_string: + printf("string: %s\n", element_list->value.string.value); + break; + case json_array: + printf("array\n"); + dump_array(&element_list->value.array); + break; + case json_object: + printf("object\n"); + dump_json(&element_list->value.object); + break; + }; + } +} +void dump_json(struct JSON_object* root_obj){ + struct JSON_object_member* member_list = get_members(root_obj); + for(;member_list != NULL;member_list = next_member(member_list)){ + switch(get_member_type(member_list)){ + case json_integer: + printf("integer: %li\n", member_list->value.integer); + break; + case json_dfloat: + printf("double: %lf\n", member_list->value.dfloat); + break; + case json_boolean: + printf("boolean: %i\n", member_list->value.boolean); + break; + case json_null: + printf("null\n"); + break; + case json_string: + printf("string: %s\n", member_list->value.string.value); + break; + case json_array: + printf("array\n"); + dump_array(&member_list->value.array); + break; + case json_object: + printf("object\n"); + dump_json(&member_list->value.object); + break; + }; + } +} + +int main(int argc, char** argv){ + char* filename = "example.json"; + if(argc > 1){ + filename = argv[1]; + } + FILE* fp = fopen(filename, "r"); + if(!fp){ + fprintf(stderr, "unable to open file\n"); + return -1; + } + size_t filelength; + fseek(fp, 0, SEEK_END); + filelength = ftell(fp) + 1; + fseek(fp, 0, SEEK_SET); + char* str = calloc(1,filelength + 1); + if(!str) + fprintf(stderr, "Unable to allocate memory!"); + fread(str, filelength, 1, fp); + fclose(fp); + + struct JSON_value* root = parse_json(str); + + struct JSON_object* root_obj = &root->object; + dump_json(root_obj); + + free(str); + if(root) + free_json(root); +}