Refactored method naming / ordering

src/common/properties.c

@@ -0,0 +1,202 @@
+#include "fastfetch.h"
+
+static bool parsePropLinePointer(const char** line, const char* start, FFstrbuf* buffer)
+{
+    if(**line == '\0')
+        return false;
+
+    //Skip any amount of whitespace at the begin of line
+    while(**line == ' ' || **line == '\t')
+        ++(*line);
+
+    while(*start != '\0')
+    {
+        // Any amount of whitespace in the format string matches any amount of whitespace in the line, even none
+        if(*start == ' ' || *start == '\t')
+        {
+            while(*start == ' ' || *start == '\t')
+                ++start;
+
+            while(**line == ' ' || **line == '\t')
+                ++(*line);
+
+            continue;
+        }
+
+        //Line doesn't match start, skip it
+        if(**line != *start || **line == '\0')
+            return false;
+
+        //Line and start match, continue testing
+        ++(*line);
+        ++start;
+    }
+
+    char valueEnd = '\n';
+
+    //Allow faster parsing of XML
+    if(*(*line - 1) == '>')
+        valueEnd = '<';
+
+    //Skip any amount of whitespace at the begin of the value
+    while(**line == ' ' || **line == '\t')
+        ++(*line);
+
+    //Allow faster parsing of quotet values
+    if(**line == '"' || **line == '\'')
+    {
+        valueEnd = **line;
+        ++(*line);
+    }
+
+    //Copy the value to the buffer
+    while(**line != valueEnd && **line != '\n' && **line != '\0')
+    {
+        ffStrbufAppendC(buffer, **line);
+        ++(*line);
+    }
+
+    ffStrbufTrimRight(buffer, ' ');
+
+    return true;
+}
+
+bool ffParsePropLine(const char* line, const char* start, FFstrbuf* buffer)
+{
+    return parsePropLinePointer(&line, start, buffer);
+}
+
+bool ffParsePropLines(const char* lines, const char* start, FFstrbuf* buffer)
+{
+    while(!parsePropLinePointer(&lines, start, buffer))
+    {
+        while(*lines != '\0' && *lines != '\n')
+            ++lines;
+
+        if(*lines == '\0')
+            return false;
+
+        //Skip '\n'
+        ++lines;
+    }
+
+    return true;
+}
+
+// The following functions return true if the file was found, independently if start was found
+// Buffers which already contain content are not overwritten
+// The last occurence of start in the first file will be the one used
+// The *Values methods always return true, if all properties were already found before, without testing if the file exists
+
+bool ffParsePropFileValues(const char* filename, uint32_t numQueries, FFpropquery* queries)
+{
+    bool* searchedValues = malloc(sizeof(bool) * numQueries);
+    bool allSet = true;
+    for(uint32_t i = 0; i < numQueries; i++)
+    {
+        if((searchedValues[i] = queries[i].buffer->length == 0))
+            allSet = false;
+    }
+
+    if(allSet)
+    {
+        free(searchedValues);
+        return true;
+    }
+
+    FILE* file = fopen(filename, "r");
+    if(file == NULL)
+        return false;
+
+    char* line = NULL;
+    size_t len = 0;
+
+    while (getline(&line, &len, file) != -1)
+    {
+        for(uint32_t i = 0; i < numQueries; i++)
+        {
+            if(!searchedValues[i])
+                continue;
+
+            uint32_t currentLength = queries[i].buffer->length;
+            queries[i].buffer->length = 0;
+            if(!ffParsePropLine(line, queries[i].start, queries[i].buffer))
+                queries[i].buffer->length = currentLength;
+        }
+    }
+
+    free(searchedValues);
+
+    if(line != NULL)
+        free(line);
+
+    fclose(file);
+
+    return true;
+}
+
+bool ffParsePropFile(const char* filename, const char* start, FFstrbuf* buffer)
+{
+    return ffParsePropFileValues(filename, 1, (FFpropquery[]){{start, buffer}});
+}
+
+bool ffParsePropFileHomeValues(const FFinstance* instance, const char* relativeFile, uint32_t numQueries, FFpropquery* queries)
+{
+    FFstrbuf absolutePath;
+    ffStrbufInitA(&absolutePath, 64);
+    ffStrbufAppendS(&absolutePath, instance->state.passwd->pw_dir);
+    ffStrbufAppendC(&absolutePath, '/');
+    ffStrbufAppendS(&absolutePath, relativeFile);
+
+    bool result = ffParsePropFileValues(absolutePath.chars, numQueries, queries);
+
+    ffStrbufDestroy(&absolutePath);
+
+    return result;
+}
+
+bool ffParsePropFileHome(const FFinstance* instance, const char* relativeFile, const char* start, FFstrbuf* buffer)
+{
+    return ffParsePropFileHomeValues(instance, relativeFile, 1, (FFpropquery[]){{start, buffer}});
+}
+
+bool ffParsePropFileConfigValues(const FFinstance* instance, const char* relativeFile, uint32_t numQueries, FFpropquery* queries)
+{
+    bool foundAFile = false;
+
+    for(uint32_t i = 0; i < instance->state.configDirs.length; i++)
+    {
+        FFstrbuf* baseDir = (FFstrbuf*) ffListGet(&instance->state.configDirs, i);
+        uint32_t baseDirLength = baseDir->length;
+
+        if(*relativeFile != '/')
+            ffStrbufAppendC(baseDir, '/');
+
+        ffStrbufAppendS(baseDir, relativeFile);
+
+        if(ffParsePropFileValues(baseDir->chars, numQueries, queries))
+            foundAFile = true;
+
+        ffStrbufSubstrBefore(baseDir, baseDirLength);
+
+        bool allSet = true;
+        for(uint32_t k = 0; k < numQueries; k++)
+        {
+            if(queries[k].buffer->length == 0)
+            {
+                allSet = false;
+                break;
+            }
+        }
+
+        if(allSet)
+            break;
+    }
+
+    return foundAFile;
+}
+
+bool ffParsePropFileConfig(const FFinstance* instance, const char* relativeFile, const char* start, FFstrbuf* buffer)
+{
+    return ffParsePropFileConfigValues(instance, relativeFile, 1, (FFpropquery[]){{start, buffer}});
+}