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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct lineData{
int lineNumber;
int occurrences;
int *positionList;
} lineData;
typedef struct Data{
char *name;
int lines;
lineData *lineList;
} Data;
typedef struct dataNode{
Data *data;
struct dataNode *next;
} dataNode;
typedef dataNode* dataHead;
lineData *createLineData(int lineNumber, int occurrences, int *positionList){
lineData *newLineData = malloc(sizeof(lineData));
newLineData->lineNumber = lineNumber;
newLineData->occurrences = occurrences;
newLineData->positionList = positionList;
return newLineData;
}
Data *createData(char *name, int lines, lineData *lineList){
Data *newData = malloc(sizeof(Data));
newData->name = name;
newData->lines = lines;
newData->lineList = lineList;
return newData;
}
dataNode *createNode(Data *data, dataNode *next){
dataNode *newNode = malloc(sizeof(dataNode));
newNode->data = data;
newNode->next = next;
return newNode;
}
void addNode(dataHead *head, Data *data){
dataNode *newNode = createNode(data, NULL);
if(*head){
dataNode *temp = *head;
while(temp->next){
temp = temp->next;
}
temp->next = newNode;
}else{
(*head) = newNode;
}
}
int printLineData(lineData lineData){
for(int i = 0; i < lineData.occurrences; i++){
printf("\t\t-At position %d\n", lineData.positionList[i]);
}
return lineData.occurrences;
}
int printData(Data data){
int count = 0;
printf("Found \"%s\" in %d line%s:\n", data.name, data.lines, (data.lines>1)?"s":"");
for(int i = 0; i < data.lines; i++){
printf("\t-At line %d:\n", data.lineList[i].lineNumber);
count += printLineData(data.lineList[i]);
}
return count;
}
int printNodes(dataHead head){
int count = 0;
dataNode *node = head;
while(node){
count += printData(*node->data);
node = node->next;
}
free(node);
return count;
}
size_t getLineCount(FILE *fp){
size_t lines = 0;
while(!feof(fp)){
char ch = fgetc(fp);
if(ch == '\n') lines++;
}
rewind(fp);
return ++lines;
}
char **fileToLineArray(FILE *fp, int *fileLines){
size_t len, l = 0;
(*fileLines) = getLineCount(fp);
char **lineArray = (char**)malloc((*fileLines)*sizeof(char*)), *line = NULL;
while((len = getline(&line, &len, fp)) != -1){
if(len > 0 && line[len-1] == '\n'){
line[len-1] = '\0';
}else if(line[len-1] != '\n'){
line = (char*)realloc(line, len+1);
line[len] = '\0';
}
lineArray[l++] = line;
line = NULL;
}
rewind(fp);
return lineArray;
}
int main(int argc, char **argv){
if(argc < 3){
printf("Usage : wordfinder <document> <list>");
return 0;
}
char *docName = argv[1], *listName = argv[2];
FILE *document = fopen(docName, "r"), *list = fopen(listName, "r");
if(!document) printf("Error: \"%s\" not found\n", docName);
if(!list) printf("Error: \"%s\" not found\n", listName);
if(!document || !list){
return 0;
}
size_t docLines = 0, listLines = 0;
char **fdocument = fileToLineArray(document, &docLines);
char **flist = fileToLineArray(list, &listLines);
fclose(document);
fclose(list);
dataNode *head = NULL;
for(int i = 0; i < listLines; i++){
int lineCount = 0;
lineData *lines = malloc(sizeof(lines));
for(int j = 0; j < docLines; j++){
char *p1 = fdocument[j], *p2 = fdocument[j];
int positionCount = 0;
int *positions = malloc(sizeof(int));
while(p2 = strstr(p2, flist[i])){
positions = realloc(positions, (positionCount+1)*sizeof(int));
int pos = p2 - fdocument[j];
positions[positionCount++] = pos;
p2 += strlen(flist[i]);
}
if(positionCount){
lineData *line = createLineData(j+1, positionCount, positions);
lines = realloc(lines, (lineCount+1)*sizeof(lineData));
lines[lineCount++] = (*line);
}
}
if(lineCount){
Data *data = createData(flist[i], lineCount, lines);
addNode(&head, data);
}
}
printf("\n%d total occurrences found\n", printNodes(head));
free(head);
free(fdocument);
free(flist);
return 0;
}
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