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EasyCSV
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All private members are now public members. 

* Construction, destruction, print row, print columns all work in READ mode

Signed-off-by: Pradana AUMARS <paumars@courrier.dev>
This commit is contained in:
Pradana AUMARS 2021-07-16 18:46:36 +02:00
parent 1156c9debf
commit d4b53ede9b
10 changed files with 1160 additions and 1255 deletions
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349
include/easycsv.h
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@ -1,13 +1,73 @@
#ifndef EASYCSV_H
#define EASYCSV_H
#include "../src/_easycsv.h"
#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>
/** Public easycsv members */
typedef struct easycsv {
EASYCSV_MODE mode;
_easycsv *_priv;
} easycsv;
/*** 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 ***/
/** 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;
/*** Structures ***/
/**
* easycsv:
*
* A CSV file.
*/
typedef struct _easycsv easycsv;
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;
EASYCSV_MODE mode;
};
/*** Constructors ***/
@ -21,17 +81,17 @@ easycsv*
easycsv_init(const char*,
const EASYCSV_MODE);
/**
* Initialise easycsv structure with a given error message mode
* @param[in] relative path to CSV file
* @param[in] easycsv mode
* @param[in] easycsv error message mode
* @return pointer to easycsv structure
*/
easycsv*
easycsv_init_errormsg(const char*,
const EASYCSV_MODE,
const EASYCSV_ERRORMSG);
/* /\** */
/* * Initialise easycsv structure with a given error message mode */
/* * @param[in] relative path to CSV file */
/* * @param[in] easycsv mode */
/* * @param[in] easycsv error message mode */
/* * @return pointer to easycsv structure */
/* *\/ */
/* easycsv* */
/* easycsv_init_errormsg(const char*, */
/* const EASYCSV_MODE, */
/* const EASYCSV_ERRORMSG); */
/**
* Destroy easycsv structure
@ -40,6 +100,15 @@ easycsv_init_errormsg(const char*,
void
easycsv_free(easycsv*);
/*** Error handling ***/
/**
* Get error message
* @return easycsv error message
*/
char*
easycsv_get_error();
/*** Access, find ***/
/**
@ -51,7 +120,7 @@ easycsv_free(easycsv*);
* @return easycsv error code
*/
int
easycsv_findvalue(const easycsv*,
easycsv_find_value(const easycsv*,
const char*,
unsigned int*,
unsigned int*);
@ -63,7 +132,7 @@ easycsv_findvalue(const easycsv*,
* @return number of instances
*/
int
easycsv_findnumvalue(const easycsv*,
easycsv_find_num_value(const easycsv*,
const char*);
/*** Access, read ***/
@ -76,21 +145,21 @@ easycsv_findnumvalue(const easycsv*,
* @return string value of cell, NULL if empty cell
*/
char*
easycsv_readvalue(const easycsv*,
easycsv_read_value(const easycsv*,
unsigned int,
unsigned int);
/**
* Read string in a specific cell with named column in row 1
* @param[in] constant pointer to easycsv structure
* @param[in] row value
* @param[in] column number
* @return string value of cell, NULL if empty cell
*/
char*
easycsv_readcolumnvalue(const easycsv*,
const char*,
unsigned int);
/* /\** */
/* * Read string in a specific cell with named column in row 1 */
/* * @param[in] constant pointer to easycsv structure */
/* * @param[in] row value */
/* * @param[in] column number */
/* * @return string value of cell, NULL if empty cell */
/* *\/ */
/* char* */
/* easycsv_readcolumnvalue(const easycsv*, */
/* const char*, */
/* unsigned int); */
/*** Access, print ***/
@ -100,7 +169,7 @@ easycsv_readcolumnvalue(const easycsv*,
* @return number of rows
*/
int
easycsv_printrows(const easycsv*);
easycsv_print_rows(const easycsv*);
/**
* Return number of columns
@ -108,7 +177,7 @@ easycsv_printrows(const easycsv*);
* @return number of columns
*/
int
easycsv_printcolumns(const easycsv*);
easycsv_print_columns(const easycsv*);
/*** Modifications, sort ***/
@ -138,17 +207,17 @@ easycsv_sortcolumn(easycsv*,
/*** Modifications, insert ***/
/**
* Insert row into CSV file
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @return easycsv error code
*/
int
easycsv_insertrow(easycsv*,
const char*,
int);
/* /\** */
/* * Insert row into CSV file */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] cell value */
/* * @param[in] row number */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_insertrow(easycsv*, */
/* const char*, */
/* int); */
/**
* Insert string in a specific cell
@ -164,75 +233,75 @@ easycsv_insertvalue(easycsv*,
unsigned int,
unsigned int);
/**
* Insert string in a specific cell with specific mode
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column number
* @param[in] easycsv value mode
* @return easycsv error code
*/
int
easycsv_insertvaluemode(easycsv*,
const char*,
unsigned int,
unsigned int,
EASYCSV_VALMODE);
/* /\** */
/* * Insert string in a specific cell with specific mode */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] cell value */
/* * @param[in] row number */
/* * @param[in] column number */
/* * @param[in] easycsv value mode */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_insertvaluemode(easycsv*, */
/* const char*, */
/* unsigned int, */
/* unsigned int, */
/* EASYCSV_VALMODE); */
/**
* Insert string in a specific cell with named column in a given row
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column value
* @return easycsv error code
*/
int
easycsv_insertcolumnvalue(easycsv*,
const char*,
unsigned int,
const char*);
/* /\** */
/* * Insert string in a specific cell with named column in a given row */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] cell value */
/* * @param[in] row number */
/* * @param[in] column value */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_insertcolumnvalue(easycsv*, */
/* const char*, */
/* unsigned int, */
/* const char*); */
/**
* Insert string in a specific cell with named column in a given row with specific mode
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column value
* @param[in] easycsv value mode
* @return easycsv error code
*/
int
easycsv_insertcolumnvaluemode(easycsv*,
const char*,
unsigned int,
const char*,
EASYCSV_VALMODE);
/* /\** */
/* * Insert string in a specific cell with named column in a given row with specific mode */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] cell value */
/* * @param[in] row number */
/* * @param[in] column value */
/* * @param[in] easycsv value mode */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_insertcolumnvaluemode(easycsv*, */
/* const char*, */
/* unsigned int, */
/* const char*, */
/* EASYCSV_VALMODE); */
/*** Modifications, push ***/
/**
* Create new column on the right-hand side of an existing one
* @param[in] pointer to easycsv structure
* @param[in] column value
* @return easycsv error code
*/
int
easycsv_pushcolumn(easycsv*,
const char*);
/* /\** */
/* * Create new column on the right-hand side of an existing one */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] column value */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_pushcolumn(easycsv*, */
/* const char*); */
/**
* Insert string in a vacant cell under a named column
* @param[in] pointer to easycsv structure
* @param[in] column value
* @param[in] cell value
* @return easycsv error code
*/
int
easycsv_pushcolumnvalue(easycsv*,
const char*,
const char*);
/* /\** */
/* * Insert string in a vacant cell under a named column */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] column value */
/* * @param[in] cell value */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_pushcolumnvalue(easycsv*, */
/* const char*, */
/* const char*); */
/*** Modifications, delete ***/
@ -248,24 +317,24 @@ easycsv_deletevalue(easycsv*,
unsigned int,
unsigned int);
/**
* Delete numbered column
* @param[in] pointer to easycsv structure
* @param[in] column number
* @return easycsv error code
*/
int
easycsv_deletecolumnint(easycsv*,
unsigned int);
/* /\** */
/* * Delete numbered column */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] column number */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_deletecolumnint(easycsv*, */
/* unsigned int); */
/** Delete named column
* @param[in] pointer to easycsv structure
* @param[in] column value
* @return easycsv error code
*/
int
easycsv_deletecolumnstr(easycsv*,
const char*);
/* /\** Delete named column */
/* * @param[in] pointer to easycsv structure */
/* * @param[in] column value */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_deletecolumnstr(easycsv*, */
/* const char*); */
/* Delete numered row */
@ -273,24 +342,24 @@ easycsv_deletecolumnstr(easycsv*,
/*** Modifications, append ***/
/**
* Append two CSV files
* @param[in] destination CSV file
* @param[in] source CSV file
* @return easycsv error code
*/
int
easycsv_appendcsv(easycsv*,
easycsv*);
/* /\** */
/* * Append two CSV files */
/* * @param[in] destination CSV file */
/* * @param[in] source CSV file */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_appendcsv(easycsv*, */
/* easycsv*); */
/*** Modifications, miscellenaeous ***/
/**
* Compress a CSV file
* @param[in] pointer to easycsv structure
* @return easycsv error code
*/
int
easycsv_compress(easycsv*);
/* /\** */
/* * Compress a CSV file */
/* * @param[in] pointer to easycsv structure */
/* * @return easycsv error code */
/* *\/ */
/* int */
/* easycsv_compress(easycsv*); */
#endif /* EASYCSV_H */

8
src/Makefile.am
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@ -1,6 +1,8 @@
lib_LTLIBRARIES = libeasycsv.la
libeasycsv_la_SOURCES = \
_easycsv.c \
_easycsv.h \
easycsv.c
easycsv.c \
easycsv_error.h \
easycsv_error.c \
easycsv_p.h \
easycsv_p.c
include_HEADERS = ../include/easycsv.h

506
src/_easycsv.c
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@ -1,506 +0,0 @@
#include "_easycsv.h"
/* (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, EASYCSV_NULLCSV);
return -1;
}
/* ARGS CHECK */
/* Set temp file to read binary */
if (freopen(csv->tmpfp, "rb", csv->temp) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
/* Set file to write binary */
if (freopen(csv->fp, "wb", csv->file) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
/* Copy entire file */
char buf[BUFSIZ];
size_t size;
while (size = fread(buf, 1, BUFSIZ, csv->temp)) {
fwrite(buf, 1, size, csv->file);
}
/* Set temp file back to write */
if (freopen(csv->tmpfp, "w", csv->temp) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
/* Set file back to read */
if (freopen(csv->fp, "r", csv->file) == NULL) {
_easycsv_printerror(csv, 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, EASYCSV_NULLCSV);
return NULL;
}
if (row > csv->rows) {
_easycsv_printerror(csv, EASYCSV_OVERMAXROW);
return NULL;
}
if (row == 0) {
_easycsv_printerror(csv, EASYCSV_ZEROROW);
return NULL;
}
/* END ARGS CHECK */
/* Allocate memory */
char *str = malloc(BUFSIZ);
/* Set file pointer to start */
rewind(csv->file);
for (int i = 1; i < row; i++)
{
/* skip until row is reached */
fscanf(csv->file, "%*[^\n]\n", NULL);
}
/* Grab the row and store it in str */
fscanf(csv->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, 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
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@ -1,178 +0,0 @@
#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

867
src/easycsv.c
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@ -1,504 +1,559 @@
#include "_easycsv.h"
#include "../include/easycsv.h"
#include "easycsv_p.h"
#include "easycsv_error.h"
// typedef struct _easycsv _easycsv;
// _easycsv* _easycsv_priv_init(const char *fp, const EASYCSV_MODE mode, const EASYCSV_ERRORMSG error);
/*** Constructors ***/
/* CONSTRUCTORS AND DESTRUCTORS */
/* (Constructor) Initialise easycsv */
easycsv*
easycsv_init(const char *fp,
const EASYCSV_MODE mode)
EASYCSV_MODE mode)
{
return easycsv_init_errormsg(fp, mode, EASYCSV_ERRORSTDERR);
}
/* (Constructor) Initialise easycsv with error message option */
easycsv*
easycsv_init_errormsg(const char *fp,
const EASYCSV_MODE mode,
const EASYCSV_ERRORMSG error)
{
#ifdef EASYCSV_DEBUG
csv->start = clock();
#endif
easycsv *csv = NULL;
int csv_exist = -1;
csv = malloc(sizeof(easycsv));
easycsv *csv = malloc(sizeof(easycsv));
csv->mode = mode;
csv->_priv = _easycsv_priv_init(fp, mode, error);
csv->file = NULL;
csv->temp = NULL;
csv->fp = NULL;
csv->tmpfp = NULL;
csv->rows = 0;
csv->cols = 0;
if (csv->_priv == NULL) {
/* Open file according to mode */
switch (csv->mode) {
case EASYCSV_R:
csv->file = fopen(fp, "r");
break;
case EASYCSV_W:
csv->file = fopen(fp, "w");
break;
default:
easycsv_error(EASYCSV_UNKNOWNIOMODE, NULL);
easycsv_free(csv);
return NULL;
}
if (csv->file == NULL) {
easycsv_error(EASYCSV_OPENFAIL, NULL);
easycsv_free(csv);
return NULL;
}
csv_exist = access(csv->fp, F_OK);
size_t stfp = strlen(fp);
/* Allocate memory for char* */
csv->fp = malloc(stfp + 1); // + 1 for null
strcpy(csv->fp, fp);
/* Calculate rows and cols if file exists */
if (csv_exist) {
csv->rows = easycsv_rows(csv);
csv->cols = easycsv_columns(csv);
}
if (mode == EASYCSV_W) {
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 {
csv->tmpfp = malloc(21);
strncpy(csv->tmpfp, buffer, 21);
break;
}
} while (1);
csv->temp = fopen(csv->tmpfp, "w");
if (csv->temp == NULL) {
easycsv_error(EASYCSV_OPENFAIL, NULL);
easycsv_free(csv);
return NULL;
}
}
return csv;
}
/* (Destructor) Free easycsv memory */
void
easycsv_free(easycsv *csv)
{
/* ARGS CHECK */
if (csv == NULL)
return;
/* END ARGS CHECK */
_easycsv_priv_free(csv->_priv);
free(csv);
if (csv == NULL) free(csv);
}
/* GENERIC ALGORITHMS */
/*** Acces, find ***/
/* READ VALUE */
char*
easycsv_readvalue(const easycsv *csv,
const unsigned int col,
const unsigned int row)
/*** Acces, read ***/
/* char* */
/* easycsv_readvalue(const easycsv *csv, */
/* const unsigned int col, */
/* const unsigned int row) */
/* { */
/* /\* ARGS CHECK *\/ */
/* if (row == 0) { */
/* _easycsv_printerror(csv->csv, EASYCSV_ZEROROW); */
/* _easycsv_printerror(csv->csv, EASYCSV_READVALUEFAIL); */
/* return NULL; */
/* } */
/* if (col == 0) { */
/* _easycsv_printerror(csv->csv, EASYCSV_ZEROCOL); */
/* _easycsv_printerror(csv->csv, EASYCSV_READVALUEFAIL); */
/* return NULL; */
/* } */
/* /\* END ARGS CHECK *\/ */
/* char *str = _easycsv_getrow(csv->csv, row); */
/* if (str == NULL) { */
/* _easycsv_printerror(csv->csv, EASYCSV_ROWNOTEXIST); */
/* _easycsv_printerror(csv->csv, EASYCSV_READVALUEFAIL); */
/* return NULL; */
/* } */
/* char *val = _easycsv_getvalueinrow(csv->csv, str, col); */
/* if (val == NULL) { */
/* _easycsv_printerror(csv->csv, EASYCSV_READVALUEFAIL); */
/* return NULL; */
/* } */
/* return val; */
/* } */
/* char* */
/* easycsv_readcolumnvalue(const easycsv *csv, */
/* const char *col, */
/* const unsigned int row) */
/* { */
/* /\* ARGS CHECK *\/ */
/* if (_easycsv_checkcsvandstring_one(csv->csv, col) < 0) */
/* return NULL; */
/* if (row > csv->csv->rows) { */
/* _easycsv_printerror(csv->csv, EASYCSV_OVERMAXROW); */
/* return NULL; */
/* } */
/* /\* END ARGS CHECK *\/ */
/* int i = _easycsv_getcolumn(csv->csv, col); */
/* if (i < 1) { */
/* _easycsv_printerror(csv->csv, EASYCSV_COLNUMFAIL); */
/* return NULL; */
/* } */
/* return easycsv_readvalue(csv, i, row); */
/* } */
/*** Acces, print ***/
int
easycsv_print_rows(const easycsv *csv)
{
/* ARGS CHECK */
if (row == 0) {
_easycsv_printerror(csv->_priv, EASYCSV_ZEROROW);
_easycsv_printerror(csv->_priv, EASYCSV_READVALUEFAIL);
return NULL;
}
if (col == 0) {
_easycsv_printerror(csv->_priv, EASYCSV_ZEROCOL);
_easycsv_printerror(csv->_priv, EASYCSV_READVALUEFAIL);
return NULL;
}
/* END ARGS CHECK */
char *str = _easycsv_getrow(csv->_priv, row);
if (str == NULL) {
_easycsv_printerror(csv->_priv, EASYCSV_ROWNOTEXIST);
_easycsv_printerror(csv->_priv, EASYCSV_READVALUEFAIL);
return NULL;
}
char *val = _easycsv_getvalueinrow(csv->_priv, str, col);
if (val == NULL) {
_easycsv_printerror(csv->_priv, EASYCSV_READVALUEFAIL);
return NULL;
}
return val;
}
char*
easycsv_readcolumnvalue(const easycsv *csv,
const char *col,
const unsigned int row)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
return NULL;
if (row > csv->_priv->rows) {
_easycsv_printerror(csv->_priv, EASYCSV_OVERMAXROW);
return NULL;
}
/* END ARGS CHECK */
int i = _easycsv_getcolumn(csv->_priv, col);
if (i < 1) {
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
return NULL;
}
return easycsv_readvalue(csv, i, row);
return csv->rows;
}
int
easycsv_printrows(const easycsv *csv)
easycsv_print_columns(const easycsv *csv)
{
return csv->_priv->rows;
return csv->cols;
}
int
easycsv_printcolumns(const easycsv *csv)
{
return csv->_priv->cols;
}
/*** Modifications, sort ***/
/* INSERT VALUE -- AT SPECIFIC ROW AND COLUMN */
/*** Modifications, insert ***/
int
easycsv_insertvalue(easycsv *csv,
const char *val,
const unsigned int col,
const unsigned int row)
{
return easycsv_insertvaluemode(csv, val, col, row, EASYCSV_REPLACE);
}
/* int */
/* easycsv_insertvalue(easycsv *csv, */
/* const char *val, */
/* const unsigned int col, */
/* const unsigned int row) */
/* { */
/* return easycsv_insertvaluemode(csv, val, col, row, EASYCSV_REPLACE); */
/* } */
int
easycsv_insertvaluemode(easycsv *csv,
const char *val,
const unsigned int col,
const unsigned int row,
const EASYCSV_VALMODE valmode)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv->_priv, val) < 0)
return -1;
/* int */
/* easycsv_insertvaluemode(easycsv *csv, */
/* const char *val, */
/* const unsigned int col, */
/* const unsigned int row, */
/* const EASYCSV_VALMODE valmode) */
/* { */
/* /\* ARGS CHECK *\/ */
/* if (_easycsv_checkcsvandstring_one(csv->csv, val) < 0) */
/* return -1; */
if (col == 0) {
_easycsv_printerror(csv->_priv, EASYCSV_ZEROCOL);
return -1;
}
/* if (col == 0) { */
/* _easycsv_printerror(csv->csv, EASYCSV_ZEROCOL); */
/* return -1; */
/* } */
if (row == 0) {
_easycsv_printerror(csv->_priv, EASYCSV_ZEROROW);
return -1;
}
/* END ARGS CHECK */
/* if (row == 0) { */
/* _easycsv_printerror(csv->csv, EASYCSV_ZEROROW); */
/* return -1; */
/* } */
/* /\* END ARGS CHECK *\/ */
/* row extends max */
if (row > csv->_priv->rows) {
}
/* /\* row extends max *\/ */
/* if (row > csv->csv->rows) { */
/* } */
char *rowstr = _easycsv_getrow(csv->_priv, row);
if (rowstr == NULL)
return -1;
/* char *rowstr = _easycsv_getrow(csv->csv, row); */
/* if (rowstr == NULL) */
/* return -1; */
size_t rowstrst = strlen(rowstr);
size_t st = 0;
size_t commas = 0;
char *pch = NULL;
char *newstr = NULL;
/* size_t rowstrst = strlen(rowstr); */
/* size_t st = 0; */
/* size_t commas = 0; */
/* char *pch = NULL; */
/* char *newstr = NULL; */
/* column is within limit */
if (col <= csv->_priv->cols) {
/* /\* column is within limit *\/ */
/* if (col <= csv->csv->cols) { */
/* Set pch to start of value in rowstr */
pch = _easycsv_setcharptovalue(csv->_priv, rowstr, col);
if (pch == NULL)
return -1;
/* /\* Set pch to start of value in rowstr *\/ */
/* pch = _easycsv_setcharptovalue(csv->csv, rowstr, col); */
/* if (pch == NULL) */
/* return -1; */
/* Calculate size of existing value */
st = strcspn(pch, ",");
/* /\* Calculate size of existing value *\/ */
/* st = strcspn(pch, ","); */
newstr = malloc(rowstrst - st + strlen(val) + 1);
/* newstr = malloc(rowstrst - st + strlen(val) + 1); */
/* Copy char to newstr before value (pch) */
strncpy(newstr, rowstr, pch - rowstr);
/* /\* Copy char to newstr before value (pch) *\/ */
/* strncpy(newstr, rowstr, pch - rowstr); */
/* Insert value */
if (st != 0) { /* Occupied cell */
switch (valmode) {
case EASYCSV_CONCAT: {
strncat(newstr, pch, st);
strcat(newstr, val);
break;
}
case EASYCSV_RCONCAT: {
strcat(newstr, val);
strncat(newstr, pch, st);
break;
}
case EASYCSV_REPLACE:
default: {
strcat(newstr, val);
break;
}
}