Separated private and public methods
This commit is contained in:
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@ -1,132 +1,145 @@
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#ifndef EASYCSV_H
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#define EASYCSV_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/sendfile.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <time.h>
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#include <stdint.h>
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/* Flags for error messages */
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typedef enum {
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EASYCSV_ERRORSTDERR = 0, // default
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EASYCSV_ERROROFF,
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EASYCSV_ERRORSTDOUT
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} EASYCSV_ERRORMSG;
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/* Flags to facilitate changing modes during file copying phases */
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typedef enum {
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EASYCSV_UNKNOWNMODE = 0,
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EASYCSV_R,
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EASYCSV_W
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} EASYCSV_MODE;
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/* Flags to parameterise the easycsv_insertvalue */
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typedef enum {
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EASYCSV_REPLACE, /* (Default) Replaces word */
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EASYCSV_CONCAT, /* Concantates word at the end */
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EASYCSV_RCONCAT, /* Concantates word from the start */
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} EASYCSV_VALMODE;
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typedef enum {
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EASYCSV_ALPHA, /* sort alphabetically */
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EASYCSV_RALPHA, /* sort reverse alphabetically */
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EASYCSV_NUMER, /* sort numerically, from lowest value to highest */
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EASYCSV_RNUMER /* sort from highest value to lowest */
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} EASYCSV_SORT;
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#include "../src/_easycsv.h"
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typedef struct _easycsv _easycsv;
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/* Public easycsv members */
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/** Public easycsv members */
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typedef struct easycsv {
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EASYCSV_MODE mode; // end users able to easily modify mode to their needs
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_easycsv *_priv; // private members
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EASYCSV_MODE mode;
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_easycsv *_priv;
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} easycsv;
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/*
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* ============================
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* FUNCTION PROTOTYPES - PUBLIC
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* ============================
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/*** Constructors ***/
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/**
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* Initialise easycsv
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* @param[in] relative path to CSV file
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* @param[in] easycsv mode
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* @return pointer to easycsv structure
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*/
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/* CONSTRUCTORS AND DESTRUCTORS */
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/* (Constructor) Initialise easycsv */
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easycsv*
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easycsv_init(const char*,
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const EASYCSV_MODE);
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/* (Constructor) Initialise easycsv with error message option */
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/**
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* Initialise easycsv structure with a given error message mode
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* @param[in] relative path to CSV file
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* @param[in] easycsv mode
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* @param[in] easycsv error message mode
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* @return pointer to easycsv structure
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*/
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easycsv*
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easycsv_init_errormsg(const char*,
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const EASYCSV_MODE,
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const EASYCSV_ERRORMSG);
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/* (Destructor) Free easycsv memory */
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/**
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* Destroy easycsv structure
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* @param[in] Pointer to easycsv stucture
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*/
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void
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easycsv_free(easycsv*);
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/* GENERIC ALGORITHMS */
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/*** Access ***/
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/* Find value and returns row and column in unsigned int pointers */
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/**
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* Find value and returns row and column
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* @param[in] constant pointer to easycsv structure
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* @param[in] value to find
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* @param[out] row number
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* @param[out] column number
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* @return easycsv error code
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*/
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int
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easycsv_findvalue(const easycsv*,
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const char*,
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unsigned int*,
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unsigned int*);
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/* Find number of instances of value */
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/**
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* Find number of instances of value
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* @param[in] constant pointer to easycsv structure
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* @param[in] value to find
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* @return number of instances
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*/
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int
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easycsv_findnumvalue(const easycsv*,
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const char*);
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/**
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* Read string in a specific cell
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* @param[in] constant pointer to easycsv structure
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* @param[in] row number
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* @param[in] column number
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* @return string value of cell, NULL if empty cell
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*/
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char*
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easycsv_readvalue(const easycsv*,
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unsigned int,
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unsigned int);
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/**
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* Read string in a specific cell with named column in row 1
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* @param[in] constant pointer to easycsv structure
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* @param[in] row value
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* @param[in] column number
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* @return string value of cell, NULL if empty cell
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*/
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char*
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easycsv_readcolumnvalue(const easycsv*,
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const char*,
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unsigned int);
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/**
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* Return number of rows
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* @param[in] constant pointer to easycsv structure
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* @return number of rows
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*/
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int
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easycsv_printrows(const easycsv*);
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/**
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* Return number of columns
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* @param[in] constant pointer to easycsv structure
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* @return number of columns
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*/
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int
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easycsv_printcolumns(const easycsv*);
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/*** Modifications, sort ***/
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/**
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* Sort row
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* @param[in] pointer to easycsv structure
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* @param[in] row value
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* @param[in] easycsv sort mode
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* @return easycsv error code
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*/
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int
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easycsv_sortrow(easycsv*,
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const char*,
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const EASYCSV_SORT);
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/**
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* Sort column
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* @param[in] pointer to easycsv structure
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* @param[in] column value
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* @param[in] easycsv sort mode
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* @return easycsv error code
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*/
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int
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easycsv_sortcolumn(easycsv*,
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const char*,
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const EASYCSV_SORT);
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/* Append to CSV files */
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int
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easycsv_appendcsv(easycsv*,
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easycsv*);
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/*** Modifications, insert ***/
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int
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easycsv_compress(easycsv*);
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/* READ VALUE */
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/* Read string in a specific cell */
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char*
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easycsv_readvalue(const easycsv*,
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const unsigned int,
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const unsigned int);
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/* Read string in a specific cell with named column in row 1 */
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char*
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easycsv_readcolumnvalue(const easycsv*,
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easycsv_insertrow(easycsv*,
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const char*,
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const unsigned int);
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/* Number of rows in entire CSV file */
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int
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easycsv_printrows(const easycsv*);
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/* Number of columns in entire CSV file */
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int
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easycsv_printcolumns(const easycsv*);
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/* INSERT VALUE -- AT SPECIFIC ROW AND COLUMN */
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// int easycsv_insertrow(struct easycsv*, const char*, const int);
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const int);
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/* Insert string in a specific cell */
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int
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@ -158,7 +171,7 @@ easycsv_insertcolumnvaluemode(easycsv*,
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const char*,
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const EASYCSV_VALMODE);
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/* PUSH VALUE */
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/* Modifications, push */
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/* Create new column on the RHS of an existing one */
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int
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@ -171,7 +184,7 @@ easycsv_pushcolumnvalue(easycsv*,
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const char*,
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const char*);
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/* DELETE VALUES -- use INSERT VALUE with empty string*/
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/* Modifications, delete */
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/* Delete CSV value */
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int
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@ -193,4 +206,16 @@ easycsv_deletecolumnstr(easycsv*,
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/* Delete named row */
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/* Modifications, append */
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int
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easycsv_appendcsv(easycsv*,
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easycsv*);
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/*** Modifications, miscellenaeous ***/
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int
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easycsv_compress(easycsv*);
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#endif /* EASYCSV_H */
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@ -1,3 +1,6 @@
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lib_LTLIBRARIES = libeasycsv.la
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libeasycsv_la_SOURCES = easycsv.c
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libeasycsv_la_SOURCES = \
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_easycsv.c \
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_easycsv.h \
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easycsv.c
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include_HEADERS = ../include/easycsv.h
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506
src/_easycsv.c
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506
src/_easycsv.c
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@ -0,0 +1,506 @@
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#include "_easycsv.h"
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/* (Constructor) Initialise _easycsv */
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_easycsv*
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_easycsv_priv_init(const char *fp,
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const EASYCSV_MODE mode,
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const EASYCSV_ERRORMSG error)
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{
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_easycsv *_priv = malloc(sizeof(_easycsv));
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_priv->file = NULL;
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_priv->temp = NULL;
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_priv->fp = NULL;
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_priv->tmpfp = NULL;
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_priv->rows = 0;
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_priv->cols = 0;
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#ifdef EASYCSV_DEBUG
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_priv->start = 0;
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#endif
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_priv->error = error;
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/* Open file according to mode */
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switch (mode) {
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case EASYCSV_R: {
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_priv->file = fopen(fp, "r");
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break;
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}
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case EASYCSV_W: {
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_priv->file = fopen(fp, "w");
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break;
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}
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default: {
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_easycsv_printerror(_priv, EASYCSV_UNKNOWNIOMODE);
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_easycsv_priv_free(_priv);
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return NULL;
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}
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}
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if (_priv->file == NULL)
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{
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_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
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_easycsv_priv_free(_priv);
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return NULL;
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}
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size_t stfp = strlen(fp);
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/* Allocate memory for char* */
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_priv->fp = malloc(stfp + 1); // + 1 for null
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strcpy(_priv->fp, fp);
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/* Calculate rows and cols if file exists */
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if (access(_priv->fp, F_OK) == 0) {
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_priv->rows = _easycsv_rows(_priv, mode);
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_priv->cols = _easycsv_columns(_priv, mode);
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}
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if (mode == EASYCSV_W) {
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/* csv->tmpfp = malloc(16 + stfp + 1); */
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/* strncpy(csv->tmpfp, prefix, 16); */
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/* strncat(csv->tmpfp, fp, stfp); */
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do {
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/* Write to temporary file */
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unsigned int i = 1;
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char buffer[21] = "/tmp/easycsv-"; // 13 char, 3 for digits, 4 for .csv, 1 for NULL
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if (i < 100)
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strncat(buffer, "0", 1);
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if (i < 10)
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strncat(buffer, "0", 1);
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sprintf(buffer + strlen(buffer), "%i", i);
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strcat(buffer, ".csv");
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if (access(buffer, F_OK) < 0) {
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i++;
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}
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else {
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_priv->tmpfp = malloc(21);
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strncpy(_priv->tmpfp, buffer, 21);
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break;
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}
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} while (1);
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_priv->temp = fopen(_priv->tmpfp, "w");
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if (_priv->temp == NULL) {
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_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
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_easycsv_priv_free(_priv);
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return NULL;
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}
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/*
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#ifdef EASYCSV_DEBUG
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printf("[%i] easycsv_debug: temp file %s opened\n", clock() - csv->start, csv->tmpfp);
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#endif*/
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/*
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if (freopen(csv->fp, csv->mode, csv->file) == NULL) {
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fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
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return NULL;
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}
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if (freopen(csv->tmpfp, csv->mode, csv->temp) == NULL) {
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fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
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return NULL;
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}
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*/
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}
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return _priv;
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}
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/* (Destructor) Free _easycsv memory */
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void
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_easycsv_priv_free(_easycsv *_priv)
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{
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/* ARGS CHECK */
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if (_priv == NULL)
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return;
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/* ARGS CHECK */
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if (_priv->file != NULL)
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fclose(_priv->file);
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if (_priv->temp != NULL)
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fclose(_priv->temp);
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if (_priv->fp != NULL)
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free(_priv->fp);
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if (_priv->tmpfp != NULL)
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free(_priv->tmpfp);
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free(_priv);
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}
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int
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_easycsv_update(_easycsv *csv)
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{
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/* ARGS CHECK */
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if (csv == NULL) {
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_easycsv_printerror(csv, EASYCSV_NULLCSV);
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return -1;
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}
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/* ARGS CHECK */
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/* Set temp file to read binary */
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if (freopen(csv->tmpfp, "rb", csv->temp) == NULL) {
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_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
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easycsv_free(csv);
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return -1;
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}
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/* Set file to write binary */
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if (freopen(csv->fp, "wb", csv->file) == NULL) {
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_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
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easycsv_free(csv);
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return -1;
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}
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/* Copy entire file */
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char buf[BUFSIZ];
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size_t size;
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while (size = fread(buf, 1, BUFSIZ, csv->temp)) {
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fwrite(buf, 1, size, csv->file);
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}
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/* Set temp file back to write */
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if (freopen(csv->tmpfp, "w", csv->temp) == NULL) {
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_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
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easycsv_free(csv);
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return -1;
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}
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/* Set file back to read */
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if (freopen(csv->fp, "r", csv->file) == NULL) {
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_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
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easycsv_free(csv);
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return -1;
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}
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return 0;
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}
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int
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_easycsv_rows(_easycsv *_priv,
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const EASYCSV_MODE mode)
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{
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// no need to check _priv for NULL
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if (_easycsv_rewind(_priv, mode) < 0)
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return -1;
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int rows = 1;
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char c;
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/* Go through each character in the file and count the number of \n
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in it */
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while ((c = fgetc(_priv->file)) != EOF) {
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if (c == '\n') rows++;
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}
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return rows;
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}
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int
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_easycsv_columns(_easycsv *_priv,
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const EASYCSV_MODE mode)
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{
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// no need to check _priv for NULL
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/* Prepare it for reading */
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if (_easycsv_rewind(_priv, mode) < 0) return -1;
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/*
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1. check if empty file
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2. check if only one column -> 0 commas
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3. if >1 column, n commas = n+1 columns
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*/
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int col = 1;
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char c;
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while ((c = fgetc(_priv->file)) != '\n') {
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if (c == ',') col++;
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}
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return col;
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}
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char*
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_easycsv_getrow(const _easycsv *csv,
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const unsigned int row)
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{
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/* ARGS CHECK */
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if (csv == NULL) {
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_easycsv_printerror(csv, EASYCSV_NULLCSV);
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return NULL;
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}
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if (row > csv->rows) {
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_easycsv_printerror(csv, EASYCSV_OVERMAXROW);
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return NULL;
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}
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if (row == 0) {
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_easycsv_printerror(csv, EASYCSV_ZEROROW);
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return NULL;
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}
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/* END ARGS CHECK */
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/* Allocate memory */
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char *str = malloc(BUFSIZ);
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/* Set file pointer to start */
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rewind(csv->file);
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for (int i = 1; i < row; i++)
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{
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/* skip until row is reached */
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fscanf(csv->file, "%*[^\n]\n", NULL);
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}
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/* Grab the row and store it in str */
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fscanf(csv->file, "%s\n", str);
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||||
|
||||
// printf("row: %s\n", str);
|
||||
|
||||
return str;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_rewind(_easycsv *_priv,
|
||||
const EASYCSV_MODE mode)
|
||||
{
|
||||
/* Check if empty file */
|
||||
if (fscanf(_priv->file, "\n") == EOF) {
|
||||
_easycsv_printerror(_priv, EASYCSV_EMPTYCSV);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Check if file is readable */
|
||||
if (mode != EASYCSV_R) {
|
||||
_easycsv_printerror(_priv, EASYCSV_UNREADABLE);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set file pointer to the start */
|
||||
rewind(_priv->file);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_getcolumn(const _easycsv *csv,
|
||||
const char *col)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
|
||||
return -1;
|
||||
/* ARGS CHECK */
|
||||
|
||||
/* Grab str of row 1 */
|
||||
char *firstrow = _easycsv_getrow(csv, 1);
|
||||
|
||||
if (firstrow == NULL) {
|
||||
_easycsv_printerror(csv, EASYCSV_ROWNOTEXIST);
|
||||
return -1;
|
||||
}
|
||||
|
||||
unsigned int commas = 0;
|
||||
|
||||
// printf("FIRST COLUMN: %s\n", firstrow);
|
||||
|
||||
/* Find first occurance of col in firstrow */
|
||||
char *str = strstr(firstrow, col);
|
||||
|
||||
if (str == NULL) {
|
||||
_easycsv_printerror(csv, EASYCSV_COLNOTEXIST);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Count numbers of commas following str */
|
||||
char *c = strpbrk(str, ",");
|
||||
while (c != NULL) {
|
||||
commas++;
|
||||
c = strpbrk(c + 1, ",");
|
||||
}
|
||||
|
||||
/* no need to free c as it is already NULL at this point */
|
||||
// free((char*) str); apparently invalid pointer
|
||||
|
||||
// printf("ROW: %i\nCOL: %i\n", row, csv->cols - commas);
|
||||
/*
|
||||
#ifdef EASYCSV_DEBUG
|
||||
printf("[%i] rcv_commas: %i\n", clock() - csv->start, commas);
|
||||
#endif
|
||||
*/
|
||||
free(firstrow);
|
||||
|
||||
return csv->cols - commas;
|
||||
}
|
||||
|
||||
/*
|
||||
int _easycsv_checkifvalue(struct easycsv *csv, const int col, const int row)
|
||||
{
|
||||
const char *rowstr = _easycsv_getrow(csv, row);
|
||||
|
||||
return 0;
|
||||
}
|
||||
*/
|
||||
|
||||
char*
|
||||
_easycsv_getvalueinrow(const _easycsv *_priv,
|
||||
const char *row,
|
||||
const unsigned int col)
|
||||
{
|
||||
size_t st;
|
||||
char *pch = NULL;
|
||||
|
||||
/* If not first column */
|
||||
if (col != 1) {
|
||||
|
||||
/* Get first occurance of comma in str,
|
||||
the first value is ommited but not the comma */
|
||||
char *pch = strpbrk(row, ",");
|
||||
|
||||
/* Repeat until desired col is found */
|
||||
for (int i = 2; i < col; i++) {
|
||||
pch = strpbrk(pch + 1, ",");
|
||||
}
|
||||
}
|
||||
|
||||
/* Get span from start of string to first occurence
|
||||
of comma */
|
||||
st = strcspn(pch + 1, ",");
|
||||
|
||||
/* If 0, no string exists! */
|
||||
if (st == 0) {
|
||||
_easycsv_printerror(_priv, EASYCSV_EMPTYVALUE);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
char *val = malloc(st + 1);
|
||||
strncpy(val, pch + 1, st);
|
||||
strncat(val, "\0", 1);
|
||||
|
||||
return val;
|
||||
}
|
||||
|
||||
char*
|
||||
_easycsv_setcharptovalue(const _easycsv *_priv,
|
||||
const char *rowstr,
|
||||
const unsigned int col)
|
||||
{
|
||||
char *pch = rowstr;
|
||||
|
||||
for (unsigned int i = 1; i < col; i++) {
|
||||
pch = strchr(rowstr, ',');
|
||||
if (pch == NULL) {
|
||||
_easycsv_printerror(_priv, EASYCSV_NULLPTR);
|
||||
return NULL;
|
||||
}
|
||||
pch++;
|
||||
}
|
||||
|
||||
return pch;
|
||||
}
|
||||
|
||||
void
|
||||
_easycsv_printerror(const _easycsv *_priv,
|
||||
const EASYCSV_ERROR error)
|
||||
{
|
||||
switch (_priv->error) {
|
||||
case EASYCSV_ERROROFF: return;
|
||||
case EASYCSV_ERRORSTDOUT: _easycsv_geterror(_priv, error, stdout); break;
|
||||
case EASYCSV_ERRORSTDERR:
|
||||
default: _easycsv_geterror(_priv, error, stderr); return;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
_easycsv_geterror(const _easycsv *_priv,
|
||||
const EASYCSV_ERROR error,
|
||||
FILE *fs)
|
||||
{
|
||||
#ifdef EASYCSV_DEBUG
|
||||
fprintf(stderr, "[%i] ", clock() - _priv->start);
|
||||
#endif
|
||||
|
||||
fputs("easycsv: ", fs);
|
||||
|
||||
switch (error) {
|
||||
|
||||
/* Generic errors */
|
||||
case EASYCSV_NOERROR: fputs("no error", fs); break;
|
||||
case EASYCSV_NULLCSV: fputs("easycsv pointer is NULL", fs); break;
|
||||
case EASYCSV_NULLPTR: fputs("pointer is NULL", fs); break;
|
||||
case EASYCSV_EMPTYSTRING: fputs("string is empty", fs); break;
|
||||
case EASYCSV_EMPTYVALUE: fputs("value in CSV file is empty", fs); break;
|
||||
case EASYCSV_OVERMAXROW: fprintf(fs, "int exceeds row limit %i", _priv->rows); break;
|
||||
case EASYCSV_OVERMAXCOL: fprintf(fs, "int exceeds column limit %i", _priv->cols); break;
|
||||
case EASYCSV_ZEROROW: fputs("parameterised row number is zero", fs); break;
|
||||
case EASYCSV_ZEROCOL: fputs("parameterised column number is zero", fs); break;
|
||||
|
||||
/* File input/output errors */
|
||||
case EASYCSV_UNKNOWNIOMODE: fputs("unknown file IO mode", fs); break;
|
||||
case EASYCSV_OPENFAIL: fputs("failed to open file", fs); break;
|
||||
case EASYCSV_REOPENFAIL: fputs("failed to reopen file", fs); break;
|
||||
case EASYCSV_EMPTYCSV: fputs("CSV file is empty", fs); break;
|
||||
case EASYCSV_UNWRITABLE: fputs("CSV file is not in a writable mode", fs); break;
|
||||
case EASYCSV_UNREADABLE: fputs("CSV file is not in a readable mode", fs); break;
|
||||
case EASYCSV_UPDATEFAIL: fputs("CSV file has failed to update", fs); break;
|
||||
case EASYCSV_UPDATETEMPFAIL: fputs("failed to update temp CSV file", fs); break;
|
||||
case EASYCSV_FILEPTRFAIL: fputs("failed to move FILE pointer", fs); break;
|
||||
|
||||
/* Non-existant elements */
|
||||
case EASYCSV_ROWNOTEXIST: fputs("given row does not exist", fs); break;
|
||||
case EASYCSV_COLNOTEXIST: fputs("given column does not exist", fs); break;
|
||||
|
||||
/* User-facing failure */
|
||||
case EASYCSV_PUSHCOLFAIL: fputs("failed to push value under column", fs); break;
|
||||
case EASYCSV_COLNUMFAIL: fputs("failed to determine the column number of a value in the first row", fs); break;
|
||||
default: fputs("unknown error, easycsv* is possibly NULL", fs); break;
|
||||
}
|
||||
|
||||
if (_priv->fp != NULL)
|
||||
fprintf(fs, " in %s", _priv->fp);
|
||||
|
||||
fputc('\n', fs);
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_checkcsvandstring_one(const _easycsv *csv,
|
||||
const char *one)
|
||||
{
|
||||
if (csv == NULL) {
|
||||
_easycsv_printerror(csv, EASYCSV_NULLCSV);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (one == NULL) {
|
||||
_easycsv_printerror(csv, EASYCSV_EMPTYSTRING);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_checkcsvandstring_two(const _easycsv *csv,
|
||||
const char *one,
|
||||
const char *two)
|
||||
{
|
||||
if (_easycsv_checkcsvandstring_one(csv, one) < 0)
|
||||
return -1;
|
||||
|
||||
if (two == NULL) {
|
||||
_easycsv_printerror(csv, EASYCSV_EMPTYSTRING);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
178
src/_easycsv.h
Normal file
178
src/_easycsv.h
Normal file
@ -0,0 +1,178 @@
|
||||
#ifndef _EASYCSV
|
||||
#define _EASYCSV
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/sendfile.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <time.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include "easycsv_error.h"
|
||||
|
||||
/* Generic type definitions for internal use */
|
||||
|
||||
typedef uint32_t row_t; // max length of 2^32 - 1
|
||||
typedef uint32_t column_t;
|
||||
typedef char* rowstr; // non-const, to free it after usage
|
||||
|
||||
/** Flags for error messages */
|
||||
typedef enum {
|
||||
EASYCSV_ERRORSTDERR = 0,
|
||||
EASYCSV_ERROROFF,
|
||||
EASYCSV_ERRORSTDOUT
|
||||
} EASYCSV_ERRORMSG;
|
||||
|
||||
/** Flags to facilitate changing modes during file copying phases */
|
||||
typedef enum {
|
||||
EASYCSV_UNKNOWNMODE = 0,
|
||||
EASYCSV_R,
|
||||
EASYCSV_W
|
||||
} EASYCSV_MODE;
|
||||
|
||||
/** Flags to parameterise the easycsv_insertvalue */
|
||||
typedef enum {
|
||||
EASYCSV_REPLACE, ///< (default) replaces word
|
||||
EASYCSV_CONCAT, ///< concantates word at the end
|
||||
EASYCSV_RCONCAT, ///< concantates word from the start
|
||||
} EASYCSV_VALMODE;
|
||||
|
||||
/** Flags to parameterise sorting */
|
||||
typedef enum {
|
||||
EASYCSV_ALPHA, ///< sort alphabetically
|
||||
EASYCSV_RALPHA, ///< sort reverse alphabetically
|
||||
EASYCSV_NUMER, ///< sort numerically, from lowest value to highest
|
||||
EASYCSV_RNUMER ///< sort from highest value to lowest
|
||||
} EASYCSV_SORT;
|
||||
|
||||
/* Flags denoting cell type */
|
||||
typedef enum {
|
||||
EASYCSV_NONE,
|
||||
EASYCSV_STRING,
|
||||
EASYCSV_INT,
|
||||
EASYCSV_FLOAT,
|
||||
EASYCSV_UNKNOWNTYPE
|
||||
} _EASYCSV_TYPE;
|
||||
|
||||
/* Private easycsv members */
|
||||
typedef struct _easycsv {
|
||||
FILE *file; // original CSV file
|
||||
FILE *temp; // temporary CSV file for writing
|
||||
char *fp;
|
||||
char *tmpfp;
|
||||
unsigned int rows;
|
||||
unsigned int cols;
|
||||
EASYCSV_ERRORMSG error;
|
||||
#ifdef EASYCSV_DEBUG
|
||||
clock_t start;
|
||||
#endif
|
||||
} _easycsv;
|
||||
|
||||
/* (Constructor) Initialise _easycsv */
|
||||
_easycsv*
|
||||
_easycsv_priv_init(const char*,
|
||||
const EASYCSV_MODE,
|
||||
const EASYCSV_ERRORMSG);
|
||||
|
||||
/* (Destructor) Free _easycsv memory */
|
||||
void
|
||||
_easycsv_priv_free(_easycsv*);
|
||||
|
||||
/* Verifies mode of file */
|
||||
// int _easycsv_checkmode(struct easycsv*, const char);
|
||||
|
||||
/* Copies data from temp FILE to file FILE */
|
||||
int
|
||||
_easycsv_update(_easycsv*);
|
||||
|
||||
/* Rewind easycsv, checks for readability */
|
||||
int
|
||||
_easycsv_rewind(_easycsv*,
|
||||
const EASYCSV_MODE);
|
||||
|
||||
/* Returns string of a specific row,
|
||||
includes the '\n' character as well! */
|
||||
char*
|
||||
_easycsv_getrow(const _easycsv*,
|
||||
const unsigned int);
|
||||
|
||||
/* Return column number of a named column */
|
||||
int
|
||||
_easycsv_getcolumn(const _easycsv*,
|
||||
const char*);
|
||||
|
||||
/* Verifies the type of the value (eg: string or int) */
|
||||
_EASYCSV_TYPE
|
||||
_easycsv_checktype(const _easycsv*,
|
||||
const int,
|
||||
const int);
|
||||
|
||||
/* Verifies if there is a value or not */
|
||||
int
|
||||
_easycsv_checkifvalue(const _easycsv*,
|
||||
const int,
|
||||
const int);
|
||||
|
||||
/* Grab const char* in row */
|
||||
char*
|
||||
_easycsv_getvalueinrow(const _easycsv*,
|
||||
const char*,
|
||||
const unsigned int);
|
||||
|
||||
/* Returns char pointer to start of value in rowstr */
|
||||
char*
|
||||
_easycsv_setcharptovalue(const _easycsv*,
|
||||
const char*,
|
||||
const unsigned int);
|
||||
|
||||
/* Insert value in row in specific column */
|
||||
char*
|
||||
_easycsv_insertvalueinrow(const _easycsv*,
|
||||
const char*,
|
||||
const char*,
|
||||
const unsigned int);
|
||||
|
||||
/* Calculate rows */
|
||||
int
|
||||
_easycsv_rows(_easycsv*,
|
||||
const EASYCSV_MODE);
|
||||
|
||||
/* Calculate columns*/
|
||||
int
|
||||
_easycsv_columns(_easycsv*,
|
||||
const EASYCSV_MODE);
|
||||
|
||||
void
|
||||
_easycsv_printerror(const _easycsv*,
|
||||
const EASYCSV_ERROR);
|
||||
|
||||
/* Print error from _easycsv struct in stderr */
|
||||
void
|
||||
_easycsv_geterror(const _easycsv*,
|
||||
const EASYCSV_ERROR,
|
||||
FILE*);
|
||||
|
||||
/* Check if easycsv* and const char* are NULL */
|
||||
int
|
||||
_easycsv_checkcsvandstring_one(const _easycsv*,
|
||||
const char*);
|
||||
|
||||
/* Check if easycsv* and two const char* are NULL*/
|
||||
int
|
||||
_easycsv_checkcsvandstring_two(const _easycsv*,
|
||||
const char*,
|
||||
const char*);
|
||||
|
||||
/* Verifies if the string is not NULL or empty, returns 0 on success and -1 on failure */
|
||||
// int _easycsv_checkstring(const char*);
|
||||
|
||||
/* Verifies if easycsv is not NULL or unallocated */
|
||||
// int _easycsv_checkeasycsv(const struct easycsv*);
|
||||
|
||||
/* Verifies if int is */
|
||||
// int _easycsv_checkunsigned(const int);
|
||||
|
||||
#endif
|
||||
719
src/easycsv.c
719
src/easycsv.c
@ -1,185 +1,8 @@
|
||||
#include "_easycsv.h"
|
||||
#include "../include/easycsv.h"
|
||||
|
||||
/* Generic type definitions for internal use */
|
||||
|
||||
typedef uint32_t row_t; // max length of 2^32 - 1
|
||||
typedef uint32_t column_t;
|
||||
typedef char* rowstr; // non-const, to free it after usage
|
||||
|
||||
/* I may possibly need to make types for rows,
|
||||
iterators and columns */
|
||||
|
||||
/* Flags denoting cell type */
|
||||
typedef enum {
|
||||
EASYCSV_NONE,
|
||||
EASYCSV_STRING,
|
||||
EASYCSV_INT,
|
||||
EASYCSV_FLOAT,
|
||||
EASYCSV_UNKNOWNTYPE
|
||||
} _EASYCSV_TYPE;
|
||||
|
||||
/* Error flags */
|
||||
typedef enum {
|
||||
|
||||
/* Generic errors */
|
||||
EASYCSV_NOERROR, // no error
|
||||
EASYCSV_NULLCSV, // easycsv* is NULL
|
||||
EASYCSV_NULLPTR, // generic pointer is NULL
|
||||
EASYCSV_EMPTYSTRING, // empty string
|
||||
EASYCSV_EMPTYVALUE, // value is empty
|
||||
EASYCSV_OVERMAXROW, // int exceeds row limit
|
||||
EASYCSV_OVERMAXCOL, // int exceeds col limit
|
||||
EASYCSV_ZEROROW,
|
||||
EASYCSV_ZEROCOL,
|
||||
|
||||
/* File input/output errors */
|
||||
EASYCSV_UNKNOWNIOMODE, // unknown file IO mode
|
||||
EASYCSV_OPENFAIL, // fail to open
|
||||
EASYCSV_REOPENFAIL, // fail to reopen
|
||||
EASYCSV_EMPTYCSV, // csv is empty or does not exist
|
||||
EASYCSV_UNWRITABLE, // csv mode not at EASYCSV_W
|
||||
EASYCSV_UNREADABLE, // csv mode not at EASYCSV_R
|
||||
EASYCSV_UPDATEFAIL, // update file fail = temp -> file
|
||||
EASYCSV_UPDATETEMPFAIL, // update = -> temp
|
||||
EASYCSV_FILEPTRFAIL, // move file pointer fail
|
||||
|
||||
/* Non-existant elements */
|
||||
EASYCSV_ROWNOTEXIST, // row does not exist
|
||||
EASYCSV_COLNOTEXIST, // column does not exist
|
||||
|
||||
/* User-facing failure */
|
||||
EASYCSV_PUSHCOLFAIL, // push column value fail
|
||||
EASYCSV_COLNUMFAIL, // column number retrieval fail
|
||||
EASYCSV_READVALUEFAIL, // read value fail
|
||||
} EASYCSV_ERROR;
|
||||
|
||||
/* Private easycsv members */
|
||||
typedef struct _easycsv {
|
||||
FILE *file; // original CSV file
|
||||
FILE *temp; // temporary CSV file for writing
|
||||
char *fp;
|
||||
char *tmpfp;
|
||||
unsigned int rows;
|
||||
unsigned int cols;
|
||||
EASYCSV_ERRORMSG error;
|
||||
#ifdef EASYCSV_DEBUG
|
||||
clock_t start;
|
||||
#endif
|
||||
} _easycsv;
|
||||
|
||||
/* PRIVATE FUNCTIONS */
|
||||
|
||||
/* (Constructor) Initialise _easycsv */
|
||||
static _easycsv*
|
||||
_easycsv_priv_init(const char*,
|
||||
const EASYCSV_MODE,
|
||||
const EASYCSV_ERRORMSG);
|
||||
|
||||
/* (Destructor) Free _easycsv memory */
|
||||
static void
|
||||
_easycsv_priv_free(_easycsv*);
|
||||
|
||||
/* Verifies mode of file */
|
||||
// static int _easycsv_checkmode(struct easycsv*, const char);
|
||||
|
||||
/* Copies data from temp FILE to file FILE */
|
||||
static int
|
||||
_easycsv_update(easycsv*);
|
||||
|
||||
/* Rewind easycsv, checks for readability */
|
||||
static int
|
||||
_easycsv_rewind(_easycsv*,
|
||||
const EASYCSV_MODE);
|
||||
|
||||
/* Returns string of a specific row,
|
||||
includes the '\n' character as well! */
|
||||
static char*
|
||||
_easycsv_getrow(const easycsv*,
|
||||
const unsigned int);
|
||||
|
||||
/* Return column number of a named column */
|
||||
static int
|
||||
_easycsv_getcolumn(const easycsv*,
|
||||
const char*);
|
||||
|
||||
/* Verifies the type of the value (eg: string or int) */
|
||||
static _EASYCSV_TYPE
|
||||
_easycsv_checktype(const easycsv*,
|
||||
const int,
|
||||
const int);
|
||||
|
||||
/* Verifies if there is a value or not */
|
||||
static int
|
||||
_easycsv_checkifvalue(const easycsv*,
|
||||
const int,
|
||||
const int);
|
||||
|
||||
/* Grab const char* in row */
|
||||
static char*
|
||||
_easycsv_getvalueinrow(const _easycsv*,
|
||||
const char*,
|
||||
const unsigned int);
|
||||
|
||||
/* Returns char pointer to start of value in rowstr */
|
||||
static char*
|
||||
_easycsv_setcharptovalue(const _easycsv*,
|
||||
const char*,
|
||||
const unsigned int);
|
||||
|
||||
/* Insert value in row in specific column */
|
||||
static char*
|
||||
_easycsv_insertvalueinrow(const _easycsv*,
|
||||
const char*,
|
||||
const char*,
|
||||
const unsigned int);
|
||||
|
||||
/* Calculate rows */
|
||||
static int
|
||||
_easycsv_rows(_easycsv*,
|
||||
const EASYCSV_MODE);
|
||||
|
||||
/* Calculate columns*/
|
||||
static int
|
||||
_easycsv_columns(_easycsv*,
|
||||
const EASYCSV_MODE);
|
||||
|
||||
static void
|
||||
_easycsv_printerror(const _easycsv*,
|
||||
const EASYCSV_ERROR);
|
||||
|
||||
/* Print error from _easycsv struct in stderr */
|
||||
static void
|
||||
_easycsv_geterror(const _easycsv*,
|
||||
const EASYCSV_ERROR,
|
||||
FILE*);
|
||||
|
||||
/* Check if easycsv* and const char* are NULL */
|
||||
static int
|
||||
_easycsv_checkcsvandstring_one(const easycsv*,
|
||||
const char*);
|
||||
|
||||
/* Check if easycsv* and two const char* are NULL*/
|
||||
static int
|
||||
_easycsv_checkcsvandstring_two(const easycsv*,
|
||||
const char*,
|
||||
const char*);
|
||||
|
||||
/* Verifies if the string is not NULL or empty, returns 0 on success and -1 on failure */
|
||||
// static int _easycsv_checkstring(const char*);
|
||||
|
||||
/* Verifies if easycsv is not NULL or unallocated */
|
||||
// static int _easycsv_checkeasycsv(const struct easycsv*);
|
||||
|
||||
/* Verifies if int is */
|
||||
// static int _easycsv_checkunsigned(const int);
|
||||
|
||||
/*
|
||||
* ====================
|
||||
* FUNCTION DEFINITIONS
|
||||
* ====================
|
||||
*/
|
||||
|
||||
/* == PUBLIC FUNCTIONS == */
|
||||
// typedef struct _easycsv _easycsv;
|
||||
// _easycsv* _easycsv_priv_init(const char *fp, const EASYCSV_MODE mode, const EASYCSV_ERRORMSG error);
|
||||
|
||||
/* CONSTRUCTORS AND DESTRUCTORS */
|
||||
|
||||
@ -248,7 +71,7 @@ easycsv_readvalue(const easycsv *csv,
|
||||
}
|
||||
/* END ARGS CHECK */
|
||||
|
||||
char *str = _easycsv_getrow(csv, row);
|
||||
char *str = _easycsv_getrow(csv->_priv, row);
|
||||
if (str == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_ROWNOTEXIST);
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_READVALUEFAIL);
|
||||
@ -270,7 +93,7 @@ easycsv_readcolumnvalue(const easycsv *csv,
|
||||
const unsigned int row)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
|
||||
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
|
||||
return NULL;
|
||||
|
||||
if (row > csv->_priv->rows) {
|
||||
@ -279,7 +102,7 @@ easycsv_readcolumnvalue(const easycsv *csv,
|
||||
}
|
||||
/* END ARGS CHECK */
|
||||
|
||||
int i = _easycsv_getcolumn(csv, col);
|
||||
int i = _easycsv_getcolumn(csv->_priv, col);
|
||||
if (i < 1) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
|
||||
return NULL;
|
||||
@ -319,7 +142,7 @@ easycsv_insertvaluemode(easycsv *csv,
|
||||
const EASYCSV_VALMODE valmode)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_one(csv, val) < 0)
|
||||
if (_easycsv_checkcsvandstring_one(csv->_priv, val) < 0)
|
||||
return -1;
|
||||
|
||||
if (col == 0) {
|
||||
@ -337,7 +160,7 @@ easycsv_insertvaluemode(easycsv *csv,
|
||||
if (row > csv->_priv->rows) {
|
||||
}
|
||||
|
||||
char *rowstr = _easycsv_getrow(csv, row);
|
||||
char *rowstr = _easycsv_getrow(csv->_priv, row);
|
||||
if (rowstr == NULL)
|
||||
return -1;
|
||||
|
||||
@ -415,7 +238,7 @@ easycsv_insertvaluemode(easycsv *csv,
|
||||
|
||||
/* Copy rows before newstr in csv to temp */
|
||||
for (unsigned int i = 1; i < row; i++) {
|
||||
str = _easycsv_getrow(csv, i);
|
||||
str = _easycsv_getrow(csv->_priv, i);
|
||||
if (col > csv->_priv->cols) {
|
||||
str = realloc(str, strlen(str) + commas + 1);
|
||||
for (size_t j = 0; j < commas; j++) {
|
||||
@ -464,7 +287,7 @@ easycsv_insertvaluemode(easycsv *csv,
|
||||
}
|
||||
|
||||
/* Update csv */
|
||||
if (_easycsv_update(csv) < 0)
|
||||
if (_easycsv_update(csv->_priv) < 0)
|
||||
return -1;
|
||||
|
||||
/* END UPDATE CSV */
|
||||
@ -492,7 +315,7 @@ easycsv_insertcolumnvaluemode(easycsv *csv,
|
||||
const EASYCSV_VALMODE valmode)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_two(csv, col, val) < 0)
|
||||
if (_easycsv_checkcsvandstring_two(csv->_priv, col, val) < 0)
|
||||
return -1;
|
||||
|
||||
if (row == 0) {
|
||||
@ -501,7 +324,7 @@ easycsv_insertcolumnvaluemode(easycsv *csv,
|
||||
}
|
||||
/* END ARGS CHECK */
|
||||
|
||||
int colnum = _easycsv_getcolumn(csv, col);
|
||||
int colnum = _easycsv_getcolumn(csv->_priv, col);
|
||||
if (colnum < 0) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
|
||||
return -1;
|
||||
@ -517,7 +340,7 @@ easycsv_pushcolumn(easycsv *csv,
|
||||
const char *col)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
|
||||
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
|
||||
return -1;
|
||||
/* END ARGS CHECK */
|
||||
|
||||
@ -539,7 +362,7 @@ easycsv_pushcolumn(easycsv *csv,
|
||||
}
|
||||
|
||||
/* Grab first row */
|
||||
char *str = _easycsv_getrow(csv, 1);
|
||||
char *str = _easycsv_getrow(csv->_priv, 1);
|
||||
char *pch = NULL;
|
||||
size_t i;
|
||||
|
||||
@ -586,11 +409,11 @@ easycsv_pushcolumnvalue(easycsv *csv,
|
||||
const char *val)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_two(csv, col, val) < 0)
|
||||
if (_easycsv_checkcsvandstring_two(csv->_priv, col, val) < 0)
|
||||
return -1;
|
||||
/* ARGS CHECK */
|
||||
|
||||
int colnum = _easycsv_getcolumn(csv, col);
|
||||
int colnum = _easycsv_getcolumn(csv->_priv, col);
|
||||
if (colnum < 0) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
|
||||
return -1;
|
||||
@ -662,11 +485,11 @@ easycsv_deletecolumnstr(easycsv *csv,
|
||||
const char *col)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
|
||||
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
|
||||
return -1;
|
||||
/* END ARGS CHECK */
|
||||
|
||||
int colnum = _easycsv_getcolumn(csv, col);
|
||||
int colnum = _easycsv_getcolumn(csv->_priv, col);
|
||||
if (colnum < 0)
|
||||
return -1;
|
||||
|
||||
@ -679,509 +502,3 @@ easycsV_deleterowint(easycsv *csv,
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
/* PRIVATE FUNCTIONS */
|
||||
|
||||
/* (Constructor) Initialise _easycsv */
|
||||
_easycsv*
|
||||
_easycsv_priv_init(const char *fp,
|
||||
const EASYCSV_MODE mode,
|
||||
const EASYCSV_ERRORMSG error)
|
||||
{
|
||||
_easycsv *_priv = malloc(sizeof(_easycsv));
|
||||
|
||||
_priv->file = NULL;
|
||||
_priv->temp = NULL;
|
||||
_priv->fp = NULL;
|
||||
_priv->tmpfp = NULL;
|
||||
_priv->rows = 0;
|
||||
_priv->cols = 0;
|
||||
#ifdef EASYCSV_DEBUG
|
||||
_priv->start = 0;
|
||||
#endif
|
||||
|
||||
_priv->error = error;
|
||||
|
||||
/* Open file according to mode */
|
||||
switch (mode) {
|
||||
case EASYCSV_R: {
|
||||
_priv->file = fopen(fp, "r");
|
||||
break;
|
||||
}
|
||||
case EASYCSV_W: {
|
||||
_priv->file = fopen(fp, "w");
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
_easycsv_printerror(_priv, EASYCSV_UNKNOWNIOMODE);
|
||||
_easycsv_priv_free(_priv);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
if (_priv->file == NULL)
|
||||
{
|
||||
_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
|
||||
_easycsv_priv_free(_priv);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
size_t stfp = strlen(fp);
|
||||
|
||||
/* Allocate memory for char* */
|
||||
_priv->fp = malloc(stfp + 1); // + 1 for null
|
||||
|
||||
strcpy(_priv->fp, fp);
|
||||
|
||||
/* Calculate rows and cols if file exists */
|
||||
if (access(_priv->fp, F_OK) == 0) {
|
||||
_priv->rows = _easycsv_rows(_priv, mode);
|
||||
_priv->cols = _easycsv_columns(_priv, mode);
|
||||
}
|
||||
|
||||
if (mode == EASYCSV_W) {
|
||||
|
||||
/* csv->tmpfp = malloc(16 + stfp + 1); */
|
||||
/* strncpy(csv->tmpfp, prefix, 16); */
|
||||
|
||||
/* strncat(csv->tmpfp, fp, stfp); */
|
||||
|
||||
do {
|
||||
/* Write to temporary file */
|
||||
unsigned int i = 1;
|
||||
char buffer[21] = "/tmp/easycsv-"; // 13 char, 3 for digits, 4 for .csv, 1 for NULL
|
||||
|
||||
if (i < 100)
|
||||
strncat(buffer, "0", 1);
|
||||
|
||||
if (i < 10)
|
||||
strncat(buffer, "0", 1);
|
||||
|
||||
sprintf(buffer + strlen(buffer), "%i", i);
|
||||
strcat(buffer, ".csv");
|
||||
|
||||
if (access(buffer, F_OK) < 0) {
|
||||
i++;
|
||||
}
|
||||
else {
|
||||
_priv->tmpfp = malloc(21);
|
||||
strncpy(_priv->tmpfp, buffer, 21);
|
||||
break;
|
||||
}
|
||||
|
||||
} while (1);
|
||||
|
||||
_priv->temp = fopen(_priv->tmpfp, "w");
|
||||
if (_priv->temp == NULL) {
|
||||
_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
|
||||
_easycsv_priv_free(_priv);
|
||||
return NULL;
|
||||
}
|
||||
/*
|
||||
#ifdef EASYCSV_DEBUG
|
||||
printf("[%i] easycsv_debug: temp file %s opened\n", clock() - csv->start, csv->tmpfp);
|
||||
#endif*/
|
||||
/*
|
||||
|
||||
if (freopen(csv->fp, csv->mode, csv->file) == NULL) {
|
||||
fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (freopen(csv->tmpfp, csv->mode, csv->temp) == NULL) {
|
||||
fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
|
||||
return NULL;
|
||||
}
|
||||
*/
|
||||
|
||||
}
|
||||
|
||||
return _priv;
|
||||
}
|
||||
|
||||
/* (Destructor) Free _easycsv memory */
|
||||
void
|
||||
_easycsv_priv_free(_easycsv *_priv)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_priv == NULL)
|
||||
return;
|
||||
/* ARGS CHECK */
|
||||
if (_priv->file != NULL)
|
||||
fclose(_priv->file);
|
||||
if (_priv->temp != NULL)
|
||||
fclose(_priv->temp);
|
||||
if (_priv->fp != NULL)
|
||||
free(_priv->fp);
|
||||
if (_priv->tmpfp != NULL)
|
||||
free(_priv->tmpfp);
|
||||
free(_priv);
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_update(easycsv *csv)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (csv == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_NULLCSV);
|
||||
return -1;
|
||||
}
|
||||
/* ARGS CHECK */
|
||||
|
||||
/* Set temp file to read binary */
|
||||
if (freopen(csv->_priv->tmpfp, "rb", csv->_priv->temp) == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_REOPENFAIL);
|
||||
easycsv_free(csv);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set file to write binary */
|
||||
if (freopen(csv->_priv->fp, "wb", csv->_priv->file) == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_REOPENFAIL);
|
||||
easycsv_free(csv);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Copy entire file */
|
||||
char buf[BUFSIZ];
|
||||
size_t size;
|
||||
while (size = fread(buf, 1, BUFSIZ, csv->_priv->temp)) {
|
||||
fwrite(buf, 1, size, csv->_priv->file);
|
||||
}
|
||||
|
||||
/* Set temp file back to write */
|
||||
if (freopen(csv->_priv->tmpfp, "w", csv->_priv->temp) == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_REOPENFAIL);
|
||||
easycsv_free(csv);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set file back to read */
|
||||
if (freopen(csv->_priv->fp, "r", csv->_priv->file) == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_REOPENFAIL);
|
||||
easycsv_free(csv);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_rows(_easycsv *_priv,
|
||||
const EASYCSV_MODE mode)
|
||||
{
|
||||
// no need to check _priv for NULL
|
||||
|
||||
if (_easycsv_rewind(_priv, mode) < 0)
|
||||
return -1;
|
||||
|
||||
int rows = 1;
|
||||
char c;
|
||||
|
||||
/* Go through each character in the file and count the number of \n
|
||||
in it */
|
||||
while ((c = fgetc(_priv->file)) != EOF) {
|
||||
if (c == '\n') rows++;
|
||||
}
|
||||
|
||||
return rows;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_columns(_easycsv *_priv,
|
||||
const EASYCSV_MODE mode)
|
||||
{
|
||||
// no need to check _priv for NULL
|
||||
|
||||
/* Prepare it for reading */
|
||||
if (_easycsv_rewind(_priv, mode) < 0) return -1;
|
||||
|
||||
/*
|
||||
1. check if empty file
|
||||
2. check if only one column -> 0 commas
|
||||
3. if >1 column, n commas = n+1 columns
|
||||
*/
|
||||
|
||||
int col = 1;
|
||||
char c;
|
||||
|
||||
while ((c = fgetc(_priv->file)) != '\n') {
|
||||
if (c == ',') col++;
|
||||
}
|
||||
|
||||
return col;
|
||||
}
|
||||
|
||||
char*
|
||||
_easycsv_getrow(const easycsv *csv,
|
||||
const unsigned int row)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (csv == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_NULLCSV);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (row > csv->_priv->rows) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_OVERMAXROW);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (row == 0) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_ZEROROW);
|
||||
return NULL;
|
||||
}
|
||||
/* END ARGS CHECK */
|
||||
|
||||
/* Allocate memory */
|
||||
char *str = malloc(BUFSIZ);
|
||||
|
||||
/* Set file pointer to start */
|
||||
rewind(csv->_priv->file);
|
||||
|
||||
for (int i = 1; i < row; i++)
|
||||
{
|
||||
/* skip until row is reached */
|
||||
fscanf(csv->_priv->file, "%*[^\n]\n", NULL);
|
||||
}
|
||||
|
||||
/* Grab the row and store it in str */
|
||||
fscanf(csv->_priv->file, "%s\n", str);
|
||||
|
||||
// printf("row: %s\n", str);
|
||||
|
||||
return str;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_rewind(_easycsv *_priv,
|
||||
const EASYCSV_MODE mode)
|
||||
{
|
||||
/* Check if empty file */
|
||||
if (fscanf(_priv->file, "\n") == EOF) {
|
||||
_easycsv_printerror(_priv, EASYCSV_EMPTYCSV);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Check if file is readable */
|
||||
if (mode != EASYCSV_R) {
|
||||
_easycsv_printerror(_priv, EASYCSV_UNREADABLE);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set file pointer to the start */
|
||||
rewind(_priv->file);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_getcolumn(const easycsv *csv,
|
||||
const char *col)
|
||||
{
|
||||
/* ARGS CHECK */
|
||||
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
|
||||
return -1;
|
||||
/* ARGS CHECK */
|
||||
|
||||
/* Grab str of row 1 */
|
||||
char *firstrow = _easycsv_getrow(csv, 1);
|
||||
|
||||
if (firstrow == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_ROWNOTEXIST);
|
||||
return -1;
|
||||
}
|
||||
|
||||
unsigned int commas = 0;
|
||||
|
||||
// printf("FIRST COLUMN: %s\n", firstrow);
|
||||
|
||||
/* Find first occurance of col in firstrow */
|
||||
char *str = strstr(firstrow, col);
|
||||
|
||||
if (str == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_COLNOTEXIST);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Count numbers of commas following str */
|
||||
char *c = strpbrk(str, ",");
|
||||
while (c != NULL) {
|
||||
commas++;
|
||||
c = strpbrk(c + 1, ",");
|
||||
}
|
||||
|
||||
/* no need to free c as it is already NULL at this point */
|
||||
// free((char*) str); apparently invalid pointer
|
||||
|
||||
// printf("ROW: %i\nCOL: %i\n", row, csv->_priv->cols - commas);
|
||||
/*
|
||||
#ifdef EASYCSV_DEBUG
|
||||
printf("[%i] rcv_commas: %i\n", clock() - csv->_priv->start, commas);
|
||||
#endif
|
||||
*/
|
||||
free(firstrow);
|
||||
|
||||
return csv->_priv->cols - commas;
|
||||
}
|
||||
|
||||
/*
|
||||
int _easycsv_checkifvalue(struct easycsv *csv, const int col, const int row)
|
||||
{
|
||||
const char *rowstr = _easycsv_getrow(csv, row);
|
||||
|
||||
return 0;
|
||||
}
|
||||
*/
|
||||
|
||||
char*
|
||||
_easycsv_getvalueinrow(const _easycsv *_priv,
|
||||
const char *row,
|
||||
const unsigned int col)
|
||||
{
|
||||
size_t st;
|
||||
char *pch = NULL;
|
||||
|
||||
/* If not first column */
|
||||
if (col != 1) {
|
||||
|
||||
/* Get first occurance of comma in str,
|
||||
the first value is ommited but not the comma */
|
||||
char *pch = strpbrk(row, ",");
|
||||
|
||||
/* Repeat until desired col is found */
|
||||
for (int i = 2; i < col; i++) {
|
||||
pch = strpbrk(pch + 1, ",");
|
||||
}
|
||||
}
|
||||
|
||||
/* Get span from start of string to first occurence
|
||||
of comma */
|
||||
st = strcspn(pch + 1, ",");
|
||||
|
||||
/* If 0, no string exists! */
|
||||
if (st == 0) {
|
||||
_easycsv_printerror(_priv, EASYCSV_EMPTYVALUE);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
char *val = malloc(st + 1);
|
||||
strncpy(val, pch + 1, st);
|
||||
strncat(val, "\0", 1);
|
||||
|
||||
return val;
|
||||
}
|
||||
|
||||
static char*
|
||||
_easycsv_setcharptovalue(const _easycsv *_priv,
|
||||
const char *rowstr,
|
||||
const unsigned int col)
|
||||
{
|
||||
char *pch = rowstr;
|
||||
|
||||
for (unsigned int i = 1; i < col; i++) {
|
||||
pch = strchr(rowstr, ',');
|
||||
if (pch == NULL) {
|
||||
_easycsv_printerror(_priv, EASYCSV_NULLPTR);
|
||||
return NULL;
|
||||
}
|
||||
pch++;
|
||||
}
|
||||
|
||||
return pch;
|
||||
}
|
||||
|
||||
void
|
||||
_easycsv_printerror(const _easycsv *_priv,
|
||||
const EASYCSV_ERROR error)
|
||||
{
|
||||
switch (_priv->error) {
|
||||
case EASYCSV_ERROROFF: return;
|
||||
case EASYCSV_ERRORSTDOUT: _easycsv_geterror(_priv, error, stdout); break;
|
||||
case EASYCSV_ERRORSTDERR:
|
||||
default: _easycsv_geterror(_priv, error, stderr); return;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
_easycsv_geterror(const _easycsv *_priv,
|
||||
const EASYCSV_ERROR error,
|
||||
FILE *fs)
|
||||
{
|
||||
#ifdef EASYCSV_DEBUG
|
||||
fprintf(stderr, "[%i] ", clock() - _priv->start);
|
||||
#endif
|
||||
|
||||
fputs("easycsv: ", fs);
|
||||
|
||||
switch (error) {
|
||||
|
||||
/* Generic errors */
|
||||
case EASYCSV_NOERROR: fputs("no error", fs); break;
|
||||
case EASYCSV_NULLCSV: fputs("easycsv pointer is NULL", fs); break;
|
||||
case EASYCSV_NULLPTR: fputs("pointer is NULL", fs); break;
|
||||
case EASYCSV_EMPTYSTRING: fputs("string is empty", fs); break;
|
||||
case EASYCSV_EMPTYVALUE: fputs("value in CSV file is empty", fs); break;
|
||||
case EASYCSV_OVERMAXROW: fprintf(fs, "int exceeds row limit %i", _priv->rows); break;
|
||||
case EASYCSV_OVERMAXCOL: fprintf(fs, "int exceeds column limit %i", _priv->cols); break;
|
||||
case EASYCSV_ZEROROW: fputs("parameterised row number is zero", fs); break;
|
||||
case EASYCSV_ZEROCOL: fputs("parameterised column number is zero", fs); break;
|
||||
|
||||
/* File input/output errors */
|
||||
case EASYCSV_UNKNOWNIOMODE: fputs("unknown file IO mode", fs); break;
|
||||
case EASYCSV_OPENFAIL: fputs("failed to open file", fs); break;
|
||||
case EASYCSV_REOPENFAIL: fputs("failed to reopen file", fs); break;
|
||||
case EASYCSV_EMPTYCSV: fputs("CSV file is empty", fs); break;
|
||||
case EASYCSV_UNWRITABLE: fputs("CSV file is not in a writable mode", fs); break;
|
||||
case EASYCSV_UNREADABLE: fputs("CSV file is not in a readable mode", fs); break;
|
||||
case EASYCSV_UPDATEFAIL: fputs("CSV file has failed to update", fs); break;
|
||||
case EASYCSV_UPDATETEMPFAIL: fputs("failed to update temp CSV file", fs); break;
|
||||
case EASYCSV_FILEPTRFAIL: fputs("failed to move FILE pointer", fs); break;
|
||||
|
||||
/* Non-existant elements */
|
||||
case EASYCSV_ROWNOTEXIST: fputs("given row does not exist", fs); break;
|
||||
case EASYCSV_COLNOTEXIST: fputs("given column does not exist", fs); break;
|
||||
|
||||
/* User-facing failure */
|
||||
case EASYCSV_PUSHCOLFAIL: fputs("failed to push value under column", fs); break;
|
||||
case EASYCSV_COLNUMFAIL: fputs("failed to determine the column number of a value in the first row", fs); break;
|
||||
default: fputs("unknown error, easycsv* is possibly NULL", fs); break;
|
||||
}
|
||||
|
||||
if (_priv->fp != NULL)
|
||||
fprintf(fs, " in %s", _priv->fp);
|
||||
|
||||
fputc('\n', fs);
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_checkcsvandstring_one(const easycsv *csv,
|
||||
const char *one)
|
||||
{
|
||||
if (csv == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_NULLCSV);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (one == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_EMPTYSTRING);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
_easycsv_checkcsvandstring_two(const easycsv *csv,
|
||||
const char *one,
|
||||
const char *two)
|
||||
{
|
||||
if (_easycsv_checkcsvandstring_one(csv, one) < 0)
|
||||
return -1;
|
||||
|
||||
if (two == NULL) {
|
||||
_easycsv_printerror(csv->_priv, EASYCSV_EMPTYSTRING);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
39
src/easycsv_error.h
Normal file
39
src/easycsv_error.h
Normal file
@ -0,0 +1,39 @@
|
||||
#ifndef EASYCSV_ERROR
|
||||
#define EASYCSV_ERROR
|
||||
|
||||
/* Error flags */
|
||||
typedef enum {
|
||||
|
||||
/* Generic errors */
|
||||
EASYCSV_NOERROR, // no error
|
||||
EASYCSV_NULLCSV, // easycsv* is NULL
|
||||
EASYCSV_NULLPTR, // generic pointer is NULL
|
||||
EASYCSV_EMPTYSTRING, // empty string
|
||||
EASYCSV_EMPTYVALUE, // value is empty
|
||||
EASYCSV_OVERMAXROW, // int exceeds row limit
|
||||
EASYCSV_OVERMAXCOL, // int exceeds col limit
|
||||
EASYCSV_ZEROROW,
|
||||
EASYCSV_ZEROCOL,
|
||||
|
||||
/* File input/output errors */
|
||||
EASYCSV_UNKNOWNIOMODE, // unknown file IO mode
|
||||
EASYCSV_OPENFAIL, // fail to open
|
||||
EASYCSV_REOPENFAIL, // fail to reopen
|
||||
EASYCSV_EMPTYCSV, // csv is empty or does not exist
|
||||
EASYCSV_UNWRITABLE, // csv mode not at EASYCSV_W
|
||||
EASYCSV_UNREADABLE, // csv mode not at EASYCSV_R
|
||||
EASYCSV_UPDATEFAIL, // update file fail = temp -> file
|
||||
EASYCSV_UPDATETEMPFAIL, // update = -> temp
|
||||
EASYCSV_FILEPTRFAIL, // move file pointer fail
|
||||
|
||||
/* Non-existant elements */
|
||||
EASYCSV_ROWNOTEXIST, // row does not exist
|
||||
EASYCSV_COLNOTEXIST, // column does not exist
|
||||
|
||||
/* User-facing failure */
|
||||
EASYCSV_PUSHCOLFAIL, // push column value fail
|
||||
EASYCSV_COLNUMFAIL, // column number retrieval fail
|
||||
EASYCSV_READVALUEFAIL, // read value fail
|
||||
} EASYCSV_ERROR;
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user